ci: harden rsync-ssl socat fake helpers

The regression test honestly skips when it cannot force the receiver's
output mkstemp() to fail -- as root (root bypasses DAC) and on Cygwin
(chmod 0555 does not deny the owner a write). The ubuntu, ubuntu-22.04,
almalinux and macOS jobs run `make check` as root, and Cygwin can't
enforce the unwritable directory, so the test skips on all of them.
runtests.py fails a run on any skip-set mismatch, so add the test to
those jobs' RSYNC_EXPECT_SKIPPED lists; the BSD/Solaris jobs run as root
too but enforce no expected-skip set, so they need no change.

Also tighten the pass condition. The post-chmod writability probe already
guarantees the receiver discards (mkstemp must fail), so an exit 0 would
mean the file actually transferred and the discard path was never
exercised -- a silent false-pass. Require exactly exit 23 (the forced
discard leaves the file untransferred); 12 remains the pre-fix crash.

.cvsignore

@@ -1,25 +0,0 @@
-ID
-Makefile
-autom4te*.cache
-confdefs.h
-config.cache
-config.h
-config.log
-config.status
-conftest*
-dox
-getgroups
-gmon.out
-rsync
-shconfig
-testdir
-tests-dont-exist
-testtmp
-tls
-trimslash
-t_unsafe
-wildtest
-getfsdev
-.rsync-filter
-mkrounding
-rounding.h

.gitattributes

@@ -0,0 +1,17 @@
+* text=auto eol=lf
+
+# The rsync-web/ subdirectory holds the project website source content
+# (mirrors what gets pushed to https://rsync.samba.org).  Exclude it from
+# `git archive` output so the release source tarball produced by
+# packaging/release.py step_7_tarball does not bloat with HTML the
+# tarball doesn't need.
+/rsync-web/ export-ignore
+
+# old_versions/ holds static binaries of historical rsync releases, used by the
+# version-mixing test suite (.github/workflows/ubuntu-version-mix.yml) to run
+# the current code against a real old peer over the daemon / remote-shell.
+# Mark the binaries as binary so the `text=auto eol=lf` rule above can't try to
+# normalise line endings and corrupt them; export-ignore keeps them out of the
+# release source tarball.
+/old_versions/rsync_* binary
+/old_versions/rsync_* export-ignore

.github/workflows/actionlint.yml

@@ -0,0 +1,43 @@
+name: Lint GitHub Actions workflows
+
+# Static-check the workflow YAML with rhysd/actionlint.  Catches missing
+# secrets, bad expressions, expression-type errors, unsupported runner
+# images, and (via embedded shellcheck) common pitfalls in `run:` scripts.
+# Trigger only on changes under .github/workflows/ so the rest of the
+# matrix isn't billed when nothing here moves.
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - '.github/workflows/*.yml'
+      - '.github/actionlint.yaml'
+      - '.github/actionlint.yml'
+  pull_request:
+    branches: [ master ]
+    paths:
+      - '.github/workflows/*.yml'
+      - '.github/actionlint.yaml'
+      - '.github/actionlint.yml'
+
+permissions:
+  contents: read
+
+jobs:
+  actionlint:
+    runs-on: ubuntu-latest
+    name: actionlint
+    steps:
+      - uses: actions/checkout@v4
+      - name: install actionlint
+        # Pin a version so this job is reproducible; bump deliberately.
+        # The download script verifies a SHA256 of the release tarball.
+        run: |
+          bash <(curl --proto '=https' --tlsv1.2 -fsSL \
+              https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash) \
+              1.7.12
+          echo "$PWD" >>"$GITHUB_PATH"
+      - name: actionlint --version
+        run: actionlint -version
+      - name: actionlint .github/workflows/*.yml
+        run: actionlint -color

.github/workflows/almalinux-8-build.yml

@@ -0,0 +1,83 @@
+name: Test rsync on AlmaLinux 8
+
+# Older-LTS coverage on the Fedora/RHEL family to help with backporting
+# security fixes. AlmaLinux 8 is the RHEL 8 rebuild and is the oldest
+# active LTS in this family (RHEL 8 full support runs to 2029).
+# GitHub Actions has no native runner for this family, so the job runs
+# inside an almalinux:8 container hosted on ubuntu-latest.
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/almalinux-8-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/almalinux-8-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    container:
+      image: almalinux:8
+    name: Test rsync on AlmaLinux 8
+    steps:
+    - name: install git
+      # actions/checkout needs git in the container before the checkout step.
+      run: dnf -y install git
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: prep
+      # PowerTools is needed for libzstd-devel etc; xxhash and lz4 dev
+      # headers live in EPEL on RHEL 8. The default python3 on RHEL 8
+      # is 3.6, which is too old for runtests.py (uses capture_output=
+      # / text= introduced in 3.7), so install python39 and point
+      # /usr/bin/python3 at it.
+      run: |
+        dnf -y install epel-release
+        dnf config-manager --set-enabled powertools
+        dnf -y install gcc gcc-c++ make autoconf automake m4 \
+            python39 python39-pip diffutils \
+            openssl openssl-devel \
+            attr libattr-devel acl libacl-devel \
+            zstd libzstd-devel \
+            lz4 lz4-devel \
+            xxhash xxhash-devel
+        alternatives --set python3 /usr/bin/python3.9
+        pip3 install commonmark
+    - name: configure
+      run: ./configure --with-rrsync
+    - name: make
+      run: make
+    - name: info
+      run: ./rsync --version
+    - name: check
+      # In the container we already run as root, so no sudo. The
+      # crtimes-not-supported skip matches the other Linux jobs;
+      # daemon-chroot-acl and proxy-response-line-too-long skip because
+      # the default (secure) transport opens no listening socket.
+      run: RSYNC_EXPECT_SKIPPED=crtimes,daemon-access-ip,daemon-chroot-acl,proxy-response-line-too-long,recv-discard-nullderef make check
+    - name: check (TCP daemon transport)
+      # Second run exercising the real loopback-TCP daemon path.
+      run: ./runtests.py --rsync-bin="$PWD/rsync" --use-tcp -j 8
+    - name: ssl file list
+      run: ./rsync-ssl --no-motd download.samba.org::rsyncftp/ || true
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: almalinux-8-bin
+        path: |
+          rsync
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/android-static-build.yml

@@ -0,0 +1,121 @@
+name: Build static rsync for Android
+
+# Cross-compiles statically-linked rsync binaries with the Android NDK,
+# suitable for dropping onto a phone (adb push / Termux) with no shared
+# libraries. arm64-v8a covers all modern phones; armeabi-v7a covers older
+# 32-bit devices. The binaries are uploaded as workflow artifacts.
+#
+# These are cross-compiled, so the test suite can't run here; we sanity
+# check that each binary is the right architecture, is static, and that
+# it executes (`--version`) under qemu-user.
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/android-static-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/android-static-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+  workflow_dispatch:
+
+env:
+  # Minimum supported API level. 24 (Android 7.0) runs on every modern
+  # phone while keeping broad reach; bump if you need newer Bionic APIs.
+  ANDROID_API: 24
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: ${{ matrix.abi }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - abi: arm64-v8a       # modern phones
+            triple: aarch64-linux-android
+            qemu: qemu-aarch64-static
+          - abi: armeabi-v7a     # older 32-bit phones
+            triple: armv7a-linux-androideabi
+            qemu: qemu-arm-static
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Install build prerequisites
+        run: sudo apt-get update && sudo apt-get install -y autoconf automake gawk qemu-user-static
+
+      - name: Configure and build (${{ matrix.abi }})
+        shell: bash
+        run: |
+          set -euo pipefail
+          NDK="${ANDROID_NDK_LATEST_HOME:-$ANDROID_NDK_ROOT}"
+          TC="$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin"
+          export CC="$TC/${{ matrix.triple }}${ANDROID_API}-clang"
+          export AR="$TC/llvm-ar" RANLIB="$TC/llvm-ranlib" STRIP="$TC/llvm-strip"
+          export CFLAGS="-O2" LDFLAGS="-static"
+
+          # Bionic doesn't declare lchmod()/lutimes() until API 36, but the
+          # symbols link, so configure mis-detects them -- force them off so
+          # rsync uses its fallbacks. The other cache vars restore values
+          # that configure can't probe when cross-compiling (Android runs a
+          # normal Linux kernel, so these match the native Linux result).
+          export ac_cv_func_lchmod=no ac_cv_func_lutimes=no \
+                 rsync_cv_HAVE_SOCKETPAIR=yes \
+                 rsync_cv_MKNOD_CREATES_FIFOS=yes \
+                 rsync_cv_MKNOD_CREATES_SOCKETS=yes
+
+          # Self-contained build: drop optional external libraries so the
+          # static binary needs nothing at runtime. rsync keeps md5/md4
+          # checksums and its bundled zlib.
+          ./configure --host=${{ matrix.triple }} --build=x86_64-pc-linux-gnu \
+            --enable-ipv6 \
+            --disable-zstd --disable-lz4 --disable-xxhash --disable-openssl \
+            --disable-iconv --disable-iconv-open \
+            --disable-acl-support --disable-xattr-support \
+            --disable-md2man --disable-roll-simd \
+            --with-included-popt --with-included-zlib
+
+          # Generate the awk-built headers serially first so the parallel
+          # build can't race on proto.h <- daemon-parm.h.
+          make proto.h
+          make -j"$(nproc)" rsync
+          "$STRIP" rsync
+
+      - name: Verify binary
+        shell: bash
+        run: |
+          set -euo pipefail
+          file rsync
+          # Gate: must be a statically-linked executable (no interpreter).
+          file rsync | grep -q "statically linked"
+          if file rsync | grep -q "dynamically linked"; then
+            echo "ERROR: binary is not static" >&2; exit 1
+          fi
+          # Best-effort: confirm it actually runs under qemu-user.
+          ${{ matrix.qemu }} ./rsync --version | head -3 || \
+            echo "WARNING: qemu smoke test did not run cleanly (check on a real device)"
+
+      - name: Package
+        shell: bash
+        run: |
+          set -euo pipefail
+          VER=$(sed -n 's/.*RSYNC_VERSION "\([^"]*\)".*/\1/p' version.h)
+          out="rsync-${VER}-android-${{ matrix.abi }}"
+          mkdir -p dist
+          cp rsync "dist/$out"
+          ( cd dist && sha256sum "$out" > "$out.sha256" )
+          echo "ARTIFACT_NAME=rsync-android-${{ matrix.abi }}" >>"$GITHUB_ENV"
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          retention-days: 45
+          name: ${{ env.ARTIFACT_NAME }}
+          path: dist/

.github/workflows/coverage.yml

@@ -0,0 +1,72 @@
+name: Coverage (Ubuntu)
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/coverage.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/coverage.yml'
+  schedule:
+    - cron: '42 9 * * *'
+  workflow_dispatch:
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    name: gcov coverage
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: prep
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y acl libacl1-dev attr libattr1-dev liblz4-dev libzstd-dev libxxhash-dev python3-cmarkgfm openssl gcovr
+        echo "/usr/local/bin" >>"$GITHUB_PATH"
+    - name: configure
+      run: ./configure --enable-coverage --with-rrsync
+    - name: make
+      run: make
+    - name: info
+      run: rsync --version
+    # Two coverage runs: the default pipe transport, then a second pass over a
+    # real loopback rsyncd (--use-tcp) which also exercises the require_tcp-only
+    # tests. gcovr's --print-summary line/branch/decision totals go to the step
+    # log (and the job summary below), so the numbers are visible in CI.
+    # `make coverage` exits with the suite's status, so a regression fails CI.
+    - name: coverage (pipe transport)
+      run: |
+        set -o pipefail
+        sudo make coverage 2>&1 | tee cov-pipe.log
+    - name: coverage (TCP transport)
+      run: |
+        set -o pipefail
+        sudo make coverage-tcp 2>&1 | tee cov-tcp.log
+    - name: coverage summary
+      if: always()
+      run: |
+        {
+          echo "## gcov coverage"
+          echo "### Pipe transport (\`make coverage\`)"
+          echo '```'
+          grep -E '^(lines|functions|branches|decisions):' cov-pipe.log || echo '(no summary -- see step log)'
+          echo '```'
+          echo "### TCP transport (\`make coverage-tcp\`)"
+          echo '```'
+          grep -E '^(lines|functions|branches|decisions):' cov-tcp.log || echo '(no summary -- see step log)'
+          echo '```'
+        } >> "$GITHUB_STEP_SUMMARY"
+    - name: upload HTML reports
+      if: always()
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: coverage-html
+        path: |
+          coverage
+          coverage-tcp

.github/workflows/cygwin-build.yml

@@ -0,0 +1,68 @@
+name: Test rsync on Cygwin
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/cygwin-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/cygwin-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: windows-2022
+    name: Test rsync on Cygwin
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: cygwin
+      run: choco install -y --no-progress cygwin cyg-get
+    - name: prep
+      run: |
+        cyg-get make autoconf automake gcc-core attr libattr-devel python39 python39-pip libzstd-devel liblz4-devel libssl-devel libxxhash0 libxxhash-devel
+        echo "C:/tools/cygwin/bin" >>$Env:GITHUB_PATH
+    - name: commonmark
+      run: bash -c 'python3 -mpip install --user commonmark'
+    - name: configure
+      run: bash -c './configure --with-rrsync'
+    - name: make
+      run: bash -c 'make'
+    - name: install
+      run: bash -c 'make install'
+    - name: info
+      run: bash -c '/usr/local/bin/rsync --version'
+    - name: check
+      # chown-fake / devices-fake / xattrs / xattrs-hlink now RUN on Cygwin
+      # (rsyncfns.py drives xattrs via getfattr/setfattr from the `attr`
+      # package installed above), verified on a real Cygwin host. The real
+      # chown/devices tests still skip (need root/mknod), as do the
+      # RESOLVE_BENEATH symlink-race tests.  symlink-dirlink-basis also now
+      # RUNS (the #915 non-daemon basis open uses a plain do_open, restoring
+      # following an in-tree dir-symlink basis without RESOLVE_BENEATH).
+      run: bash -c 'RSYNC_EXPECT_SKIPPED=acls-default,acls-depth,acls,bare-do-open-symlink-race,chdir-symlink-race,chown,daemon-access-ip,daemon-chroot-acl,devices,dir-sgid,open-noatime,protected-regular,proxy-response-line-too-long,recv-discard-nullderef,sender-flist-symlink-leak,simd-checksum make check'
+    - name: check (TCP daemon transport)
+      # Second run with daemon tests over a real loopback rsyncd; the default
+      # 'make check' above uses the secure stdio-pipe transport.
+      run: bash -c './runtests.py --rsync-bin=`pwd`/rsync.exe --use-tcp -j 8'
+    - name: ssl file list
+      run: bash -c 'PATH="/usr/local/bin:$PATH" rsync-ssl --no-motd download.samba.org::rsyncftp/ || true'
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: cygwin-bin
+        path: |
+          rsync.exe
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/fleettest.yml

@@ -0,0 +1,64 @@
+name: Test fleettest harness
+
+# Bitrot check for testsuite/fleettest.py (the developer fleet CI harness).
+# fleettest is meant to be run by developers on a modern Ubuntu box, so this
+# job runs only on ubuntu-latest: it stands up a one-host "fleet" of two
+# targets that both ssh to localhost and runs a real fleettest pass against it.
+# It does not run on the BSD/Solaris/macOS/Cygwin matrix.
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'testsuite/fleettest.py'
+      - '.github/workflows/fleettest.yml'
+  pull_request:
+    branches: [ master ]
+    paths:
+      - 'testsuite/fleettest.py'
+      - '.github/workflows/fleettest.yml'
+  workflow_dispatch:
+  schedule:
+    - cron: '17 7 * * 1'
+
+jobs:
+  fleettest:
+    runs-on: ubuntu-latest
+    name: fleettest against localhost
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: prep
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y gcc g++ gawk autoconf automake \
+          acl libacl1-dev attr libattr1-dev liblz4-dev libzstd-dev libxxhash-dev \
+          python3-cmarkgfm openssl rsync openssh-server
+    - name: set up ssh to localhost
+      run: |
+        mkdir -p ~/.ssh && chmod 700 ~/.ssh
+        ssh-keygen -t ed25519 -N '' -f ~/.ssh/id_ed25519
+        cat ~/.ssh/id_ed25519.pub >> ~/.ssh/authorized_keys
+        chmod 600 ~/.ssh/authorized_keys
+        sudo systemctl start ssh || sudo service ssh start
+        # fleettest connects with `ssh -o BatchMode=yes localhost`, which won't
+        # answer a host-key prompt -- so pre-trust localhost in known_hosts.
+        ssh-keyscan -H localhost 127.0.0.1 >> ~/.ssh/known_hosts 2>/dev/null
+        ssh -o BatchMode=yes -o ConnectTimeout=15 localhost 'echo ssh-to-localhost-ok'
+    - name: write localhost fleet config
+      run: |
+        cat > fleettest-ci.json <<'EOF'
+        { "targets": [
+          { "name": "local-a", "ssh_host": "localhost", "workflow": "none.yml",
+            "configure_flags": [], "builddir": "rsync-citest-a", "privilege": "sudo" },
+          { "name": "local-b", "ssh_host": "localhost", "workflow": "none.yml",
+            "configure_flags": [], "builddir": "rsync-citest-b", "privilege": "sudo" }
+        ] }
+        EOF
+    - name: fleettest --list (config sanity)
+      run: python3 testsuite/fleettest.py --fleet fleettest-ci.json --list
+    - name: run fleettest against localhost
+      # Two targets both on localhost exercise the parallel multi-target path
+      # and the per-run dir / port isolation; exit 0 iff every cell is OK.
+      run: python3 testsuite/fleettest.py --fleet fleettest-ci.json --timing

.github/workflows/freebsd-build.yml

@@ -0,0 +1,52 @@
+name: Test rsync on FreeBSD
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/freebsd-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/freebsd-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Test rsync on FreeBSD
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Test in FreeBSD VM
+      id: test
+      uses: vmactions/freebsd-vm@v1
+      with:
+        usesh: true
+        prepare: |
+          pkg install -y bash autotools m4 devel/xxhash zstd liblz4 python3 archivers/liblz4 git
+        run: |
+          freebsd-version
+          ./configure --with-rrsync -disable-zstd --disable-md2man --disable-xxhash --disable-lz4
+          make
+          ./rsync --version
+          make check
+          ./runtests.py --rsync-bin=`pwd`/rsync --use-tcp -j 8
+          ./rsync-ssl --no-motd download.samba.org::rsyncftp/ || true
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: freebsd-bin
+        path: |
+          rsync
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/macos-build.yml

@@ -0,0 +1,66 @@
+name: Test rsync on macOS
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/macos-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/macos-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: macos-latest
+    name: Test rsync on macOS
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: prep
+      run: |
+        brew install automake openssl xxhash zstd lz4
+        pip3 install --user --break-system-packages commonmark
+        echo "$(brew --prefix)/bin" >>"$GITHUB_PATH"
+    - name: configure
+      run: |
+        BREW_PREFIX=$(brew --prefix)
+        OPENSSL_PREFIX=$(brew --prefix openssl)
+        CPPFLAGS="-I${BREW_PREFIX}/include -I${OPENSSL_PREFIX}/include" \
+        LDFLAGS="-L${BREW_PREFIX}/lib -L${OPENSSL_PREFIX}/lib" \
+        ./configure --with-rrsync
+    - name: make
+      run: make
+    - name: install
+      run: sudo make install
+    - name: info
+      run: rsync --version
+    - name: check
+      # chown-fake / devices-fake / xattrs / xattrs-hlink now RUN on macOS
+      # (rsyncfns.py drives xattrs via the `xattr` command), verified on a
+      # real macOS host, so they're no longer in the skip set.
+      run: sudo RSYNC_EXPECT_SKIPPED=acls-default,acls-depth,chmod-temp-dir,daemon-access-ip,daemon-chroot-acl,dir-sgid,open-noatime,preallocate,protected-regular,proxy-response-line-too-long,recv-discard-nullderef,simd-checksum,sparse make check
+    - name: check (TCP daemon transport)
+      # Second run with daemon tests over a real loopback rsyncd; the default
+      # 'make check' above uses the secure stdio-pipe transport.
+      run: sudo ./runtests.py --rsync-bin="$PWD/rsync" --use-tcp -j 8
+    - name: ssl file list
+      run: rsync-ssl --no-motd download.samba.org::rsyncftp/ || true
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: macos-bin
+        path: |
+          rsync
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/netbsd-build.yml

@@ -0,0 +1,53 @@
+name: Test rsync on NetBSD
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/netbsd-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/netbsd-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Test rsync on NetBSD
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Test in NetBSD VM
+      id: test
+      uses: vmactions/netbsd-vm@v1
+      with:
+        usesh: true
+        prepare: |
+          PATH=/usr/sbin:$PATH pkg_add autoconf automake python312
+          ln -sf /usr/pkg/bin/python3.12 /usr/pkg/bin/python3
+        run: |
+          uname -a
+          ./configure --with-rrsync --disable-zstd --disable-md2man --disable-xxhash --disable-lz4
+          make
+          ./rsync --version
+          make check
+          ./runtests.py --rsync-bin=`pwd`/rsync --use-tcp -j 8
+          ./rsync-ssl --no-motd download.samba.org::rsyncftp/ || true
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: netbsd-bin
+        path: |
+          rsync
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/openbsd-build.yml

@@ -0,0 +1,62 @@
+name: Test rsync on OpenBSD
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/openbsd-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/openbsd-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Test rsync on OpenBSD
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Test in OpenBSD VM
+      id: test
+      uses: vmactions/openbsd-vm@v1
+      with:
+        usesh: true
+        prepare: |
+          pkg_add -I bash autoconf%2.71 automake%1.16
+        run: |
+          uname -a
+          export AUTOCONF_VERSION=2.71
+          export AUTOMAKE_VERSION=1.16
+          ./configure --with-rrsync --disable-zstd --disable-md2man --disable-xxhash --disable-lz4
+          make
+          ./rsync --version
+          make check
+          # The --use-tcp daemon tests run at -j2 here (vs -j8 elsewhere): this
+          # job runs inside a nested VM, and at -j8 the many concurrent loopback
+          # daemons occasionally lose a connection-handshake timing race under
+          # that resource pressure, hanging one test to the 300s timeout. It is
+          # an environment artifact, not an rsync bug (the handshake is
+          # deadlock-free and unreproducible elsewhere, even pinned to 1 CPU at
+          # -j8); -j2 keeps the VM from over-subscribing. The pipe `make check`
+          # above stays at the default parallelism.
+          ./runtests.py --rsync-bin=`pwd`/rsync --use-tcp -j 2
+          ./rsync-ssl --no-motd download.samba.org::rsyncftp/ || true
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: openbsd-bin
+        path: |
+          rsync
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/solaris-build.yml

@@ -0,0 +1,52 @@
+name: Test rsync on Solaris
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/solaris-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/solaris-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Test rsync on Solaris
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Test in Solaris VM
+      id: test
+      uses: vmactions/solaris-vm@v1
+      with:
+        usesh: true
+        prepare: |
+          pkg install bash automake gnu-m4 pkg://solaris/runtime/python-35 autoconf gcc git
+        run: |
+          uname -a
+          ./configure --with-rrsync -disable-zstd --disable-md2man --disable-xxhash --disable-lz4
+          make
+          ./rsync --version
+          make check
+          ./runtests.py --rsync-bin=`pwd`/rsync --use-tcp -j 8
+          ./rsync-ssl --no-motd download.samba.org::rsyncftp/ || true
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: solaris-bin
+        path: |
+          rsync
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/ubuntu-22.04-build.yml

@@ -0,0 +1,65 @@
+name: Test rsync on Ubuntu 22.04
+
+# Older-LTS coverage to help with backporting security fixes. ubuntu-22.04
+# is currently the oldest GitHub Actions runner image (20.04 was retired
+# in April 2025).
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/ubuntu-22.04-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/ubuntu-22.04-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-22.04
+    name: Test rsync on Ubuntu 22.04
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: prep
+      run: |
+        sudo apt-get install acl libacl1-dev attr libattr1-dev liblz4-dev libzstd-dev libxxhash-dev python3-cmarkgfm openssl
+        echo "/usr/local/bin" >>"$GITHUB_PATH"
+    - name: configure
+      run: ./configure --with-rrsync
+    - name: make
+      run: make
+    - name: install
+      run: sudo make install
+    - name: info
+      run: rsync --version
+    - name: check
+      run: sudo RSYNC_EXPECT_SKIPPED=crtimes,daemon-access-ip,daemon-chroot-acl,proxy-response-line-too-long,recv-discard-nullderef make check
+    - name: check30
+      run: sudo RSYNC_EXPECT_SKIPPED=crtimes,daemon-access-ip,daemon-chroot-acl,proxy-response-line-too-long,recv-discard-nullderef make check30
+    - name: check29
+      run: sudo RSYNC_EXPECT_SKIPPED=crtimes,daemon-access-ip,daemon-chroot-acl,proxy-response-line-too-long,recv-discard-nullderef make check29
+    - name: check (TCP daemon transport)
+      # Second run with daemon tests over a real loopback rsyncd; the default
+      # 'make check' above uses the secure stdio-pipe transport.
+      run: sudo ./runtests.py --rsync-bin="$PWD/rsync" --use-tcp -j 8
+    - name: ssl file list
+      run: rsync-ssl --no-motd download.samba.org::rsyncftp/ || true
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: ubuntu-22.04-bin
+        path: |
+          rsync
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/ubuntu-build.yml

@@ -0,0 +1,91 @@
+name: Test rsync on Ubuntu
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/ubuntu-build.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/ubuntu-build.yml'
+  schedule:
+    - cron: '42 8 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    name: Test rsync on Ubuntu
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: prep
+      run: |
+        sudo apt-get install acl libacl1-dev attr libattr1-dev liblz4-dev libzstd-dev libxxhash-dev python3-cmarkgfm openssl
+        echo "/usr/local/bin" >>"$GITHUB_PATH"
+    - name: configure
+      run: ./configure --with-rrsync
+    - name: make
+      run: make
+    - name: install/uninstall DESTDIR smoke test
+      run: |
+        set -e
+        tmp="$(mktemp -d)"
+        trap 'rm -rf "$tmp"' EXIT
+
+        make install-all DESTDIR="$tmp"
+
+        for path in \
+          /usr/local/bin/rsync \
+          /usr/local/bin/rsync-ssl \
+          /usr/local/bin/rrsync \
+          /usr/local/share/man/man1/rsync.1 \
+          /usr/local/share/man/man1/rsync-ssl.1 \
+          /usr/local/share/man/man1/rrsync.1 \
+          /usr/local/share/man/man5/rsyncd.conf.5 \
+          /etc/stunnel/rsyncd.conf
+        do
+          test -e "$tmp$path"
+        done
+
+        make uninstall-all DESTDIR="$tmp"
+
+        leftover="$(find "$tmp" -type f -print)"
+        if [ -n "$leftover" ]; then
+          printf '%s\n' "$leftover"
+          exit 1
+        fi
+    - name: install
+      run: sudo make install
+    - name: info
+      run: rsync --version
+    - name: check
+      run: sudo RSYNC_EXPECT_SKIPPED=crtimes,daemon-access-ip,daemon-chroot-acl,proxy-response-line-too-long,recv-discard-nullderef make check
+    - name: check30
+      run: sudo RSYNC_EXPECT_SKIPPED=crtimes,daemon-access-ip,daemon-chroot-acl,proxy-response-line-too-long,recv-discard-nullderef make check30
+    - name: check29
+      run: sudo RSYNC_EXPECT_SKIPPED=crtimes,daemon-access-ip,daemon-chroot-acl,proxy-response-line-too-long,recv-discard-nullderef make check29
+    - name: check (TCP daemon transport)
+      # Second run with daemon tests over a real loopback rsyncd. The default
+      # 'make check' above uses the secure stdio-pipe transport (no listening
+      # sockets); this run exercises the real TCP accept/auth path. Skip-set
+      # is env-dependent here (chroot-acl), so leave RSYNC_EXPECT_SKIPPED unset.
+      run: sudo ./runtests.py --rsync-bin="$PWD/rsync" --use-tcp -j 8
+    - name: ssl file list
+      run: rsync-ssl --no-motd download.samba.org::rsyncftp/ || true
+    - name: save artifact
+      uses: actions/upload-artifact@v4
+      with:
+        retention-days: 45
+        name: ubuntu-bin
+        path: |
+          rsync
+          rsync-ssl
+          rsync.1
+          rsync-ssl.1
+          rsyncd.conf.5
+          rrsync.1
+          rrsync

.github/workflows/ubuntu-version-mix.yml

@@ -0,0 +1,77 @@
+name: Test rsync version mixing on Ubuntu
+
+# Runs the CURRENT test suite with two different rsync binaries: the freshly
+# built ./rsync as the client/driver, and a committed OLD static binary
+# (old_versions/rsync_<ver>) as the daemon / remote-shell peer. This exercises
+# real version mixing over the wire -- more convincing than --protocol forcing,
+# which only makes the current binary speak an old protocol.
+#
+# Direction is fixed: the current binary always drives (only it understands the
+# new test scripts); the old binary is only ever the server/daemon side. The
+# reverse (old client driving new scripts) is not possible -- but one test,
+# reverse-daemon-delta, swaps the roles internally (current build as the daemon,
+# old binary as the client) to cover the backward-compat direction: a current
+# daemon serving the installed base of old clients.
+#
+# The per-version manifest testsuite/expect/rsync_<ver>.expect lists exactly
+# which tests run and each one's expected outcome (pass/skip/fail/xfail), so an
+# old peer's known feature gaps are recorded rather than treated as breakage.
+#
+# All peers run in a SINGLE job (looped, not a matrix) so the PR shows one check
+# line rather than one per version. Each peer/transport is a foldable ::group::
+# in the log, and a failure annotates which peer/transport broke.
+
+on:
+  push:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/ubuntu-version-mix.yml'
+  pull_request:
+    branches: [ master ]
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/ubuntu-version-mix.yml'
+  schedule:
+    - cron: '52 8 * * *'
+
+jobs:
+  version-mix:
+    runs-on: ubuntu-latest
+    name: rsync version-mix
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: prep
+      run: |
+        sudo apt-get install acl libacl1-dev attr libattr1-dev liblz4-dev libzstd-dev libxxhash-dev python3-cmarkgfm openssl
+        echo "/usr/local/bin" >>"$GITHUB_PATH"
+    - name: configure
+      run: ./configure --with-rrsync
+    - name: make
+      # check-progs builds rsync AND the test helper programs (tls, trimslash,
+      # t_unsafe, ...) that runtests.py requires; plain `make` does not.
+      run: make check-progs
+    - name: info
+      run: ./rsync --version | head -1
+    - name: version mixing (all peers, pipe + TCP transports)
+      run: |
+        rc=0
+        for peer in old_versions/rsync_*; do
+          chmod +x "$peer"
+          name=$(basename "$peer")
+          expect="testsuite/expect/$name.expect"
+          for transport in pipe tcp; do
+            tcp=()
+            [ "$transport" = tcp ] && tcp=(--use-tcp)
+            echo "::group::$name ($transport): $("$peer" --version | head -1)"
+            if ! ./runtests.py --rsync-bin="$PWD/rsync" --rsync-bin2="$PWD/$peer" \
+                  --expect-result "$expect" "${tcp[@]}" -j 8; then
+              echo "::error::version-mix failed: $name ($transport)"
+              rc=1
+            fi
+            echo "::endgroup::"
+          done
+        done
+        exit $rc

.gitignore

@@ -0,0 +1,62 @@
+*.[oa]
+*~
+dummy
+ID
+Makefile
+Makefile.old
+configure.sh
+configure.sh.old
+config.cache
+config.h
+config.h.in
+config.h.in.old
+config.log
+config.status
+aclocal.m4
+/proto.h
+/proto.h-tstamp
+/rsync*.[15]
+/rrsync
+/rrsync*.1
+/rsync*.html
+/rrsync*.html
+/help-rsync*.h
+/default-cvsignore.h
+/default-dont-compress.h
+/daemon-parm.h
+/.md2man-works
+/autom4te*.cache
+/confdefs.h
+/conftest*
+/dox
+/getgroups
+/gists
+/gmon.out
+/rsync
+/stunnel-rsyncd.conf
+/shconfig
+/git-version.h
+/testdir
+/tests-dont-exist
+/testtmp
+/tls
+/testrun
+/trimslash
+/t_unsafe
+/wildtest
+/getfsdev
+/rounding.h
+/doc/rsync.pdf
+/doc/rsync.ps
+/support/savetransfer
+/testsuite/chown-fake.test
+/testsuite/devices-fake.test
+/testsuite/xattrs-hlink.test
+/testsuite/fleettest.json
+/patches
+/patches.gen
+/build
+/auto-build-save
+.deps
+/*.exe
+*.dSYM/

COPYING

@@ -1,7 +1,16 @@
+REGARDING OPENSSL AND XXHASH
+
+In addition, as a special exception, the copyright holders give
+permission to dynamically link rsync with the OpenSSL and xxhash
+libraries when those libraries are being distributed in compliance
+with their license terms, and to distribute a dynamically linked
+combination of rsync and these libraries.  This is also considered
+to be covered under the GPL's System Libraries exception.
+
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -645,7 +654,7 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -664,11 +673,11 @@ might be different; for a GUI interface, you would use an "about box".
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
+<https://www.gnu.org/licenses/>.
 
   The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

INSTALL

@@ -1,63 +0,0 @@
-To build and install rsync:
-
-  $ ./configure
-  $ make
-  # make install
-
-You may set the installation directory and other parameters by options
-to ./configure.  To see them, use:
-
-  $ ./configure --help
-
-Configure tries to figure out if the local system uses group "nobody" or
-"nogroup" by looking in the /etc/group file.  (This is only used for the
-default group of an rsync daemon, which attempts to run with "nobody"
-user and group permissions.)  You can change the default user and group
-for the daemon by editing the NOBODY_USER and NOBODY_GROUP defines in
-config.h, or just override them in your /etc/rsyncd.conf file.
-
-As of 2.4.7, rsync uses Eric Troan's popt option-parsing library.  A
-cut-down copy of release 1.6.4 is included in the rsync distribution,
-and will be used if there is no popt library on your build host, or if
-the --with-included-popt option is passed to ./configure.
-
-If you configure using --enable-maintainer-mode, then rsync will try
-to pop up an xterm on DISPLAY=:0 if it crashes.  You might find this
-useful, but it should be turned off for production builds.
-
-RPM NOTES
----------
-
-Under packaging you will find .spec files for several distributions.
-The .spec file in packaging/lsb can be used for Linux systems that
-adhere to the Linux Standards Base (e.g., RedHat and others).
-
-HP-UX NOTES
------------
-
-The HP-UX 10.10 "bundled" C compiler seems not to be able to cope with
-ANSI C.  You may see this error message in config.log if ./configure
-fails:
-
-  (Bundled) cc: "configure", line 2162: error 1705: Function prototypes are an ANSI feature.
-
-Install gcc or HP's "ANSI/C Compiler".
-
-MAC OSX NOTES
--------------
-
-Some versions of Mac OS X (Darwin) seem to have an IPv6 stack, but do
-not completely implement the "New Sockets" API.  
-
-<http://www.ipv6.org/impl/mac.html> says that Apple started to support
-IPv6 in 10.2 (Jaguar).  If your build fails, try again after running
-configure with --disable-ipv6.
-
-IBM AIX NOTES
--------------
-
-IBM AIX has a largefile problem with mkstemp.  See IBM PR-51921.
-The workaround is to append the below to config.h
-	#ifdef _LARGE_FILES
-	#undef HAVE_SECURE_MKSTEMP
-	#endif

INSTALL.md

@@ -0,0 +1,275 @@
+# How to build and install rsync
+
+When building rsync, you'll want to install various libraries in order to get
+all the features enabled.  The configure script will alert you when the
+newest libraries are missing and tell you the appropriate `--disable-LIB`
+option to use if you want to just skip that feature.  What follows are various
+support libraries that you may want to install to build rsync with the maximum
+features (the impatient can skip down to the package summary):
+
+## Ubuntu users: skip the build, use the PPA
+
+If you are on a currently supported Ubuntu series (jammy 22.04 LTS, noble
+24.04 LTS, questing 25.10, resolute 26.04 LTS) and just want the latest
+upstream rsync, the rsync project maintains a Launchpad PPA that tracks
+stable releases:
+
+>     sudo add-apt-repository ppa:rsyncproject/rsync
+>     sudo apt update && sudo apt install rsync
+
+See [the PPA page][ppa] for current build status across architectures.
+
+[ppa]: https://launchpad.net/~rsyncproject/+archive/ubuntu/rsync
+
+To test the upcoming release instead, there is also a [`rsync-latest`
+PPA][ppa-latest] that is rebuilt from the tip of the git master branch.  These
+are development snapshots whose version numbers (such as
+`3.5.0~git20260601...`) deliberately sort below the matching stable release, so
+the stable PPA above will never silently move you from a release onto a
+snapshot.  Use it for testing only -- it may contain unreleased changes:
+
+>     sudo add-apt-repository ppa:rsyncproject/rsync-latest
+>     sudo apt update && sudo apt install rsync
+
+[ppa-latest]: https://launchpad.net/~rsyncproject/+archive/ubuntu/rsync-latest
+
+The rest of this document covers building from source.
+
+## The basic setup
+
+You need to have a C compiler installed and optionally a C++ compiler in order
+to try to build some hardware-accelerated checksum routines.  Rsync also needs
+a modern awk, which might be provided via gawk or nawk on some OSes.
+
+## Autoconf & manpages
+
+If you're installing from the git repo (instead of a release tar file) you'll
+also need the GNU autotools (autoconf & automake) and your choice of 2 python3
+markdown libraries: cmarkgfm or commonmark (needed to generate the manpages).
+If your OS doesn't provide a python3-cmarkgfm or python3-commonmark package,
+you can run the following to install the commonmark python library for your
+build user (after installing python3's pip package):
+
+>     python3 -mpip install --user commonmark
+
+You can test if you've got it fixed by running (from the rsync checkout):
+
+>     ./md-convert --test rsync-ssl.1.md
+
+Alternately, you can avoid generating the manpages by fetching the very latest
+versions (that match the latest git source) from the [generated-files][6] dir.
+One way to do that is to run:
+
+>     ./prepare-source fetchgen
+
+[6]: https://download.samba.org/pub/rsync/generated-files/
+
+## ACL support
+
+To support copying ACL file information, make sure you have an acl
+development library installed. It also helps to have the helper programs
+installed to manipulate ACLs and to run the rsync testsuite.
+
+## Xattr support
+
+To support copying xattr file information, make sure you have an attr
+development library installed. It also helps to have the helper programs
+installed to manipulate xattrs and to run the rsync testsuite.
+
+## xxhash
+
+The [xxHash library][1] provides extremely fast checksum functions that can
+make the "rsync algorithm" run much more quickly, especially when matching
+blocks in large files.  Installing this development library adds xxhash
+checksums as the default checksum algorithm.  You'll need at least v0.8.0
+if you want rsync to include the full range of its checksum algorithms.
+
+[1]: https://cyan4973.github.io/xxHash/
+
+## zstd
+
+The [zstd library][2] compression algorithm that uses less CPU than
+the default zlib algorithm at the same compression level.  Note that you
+need at least version 1.4, so you might need to skip the zstd compression if
+you can only install a 1.3 release.  Installing this development library
+adds zstd compression as the default compression algorithm.
+
+[2]: http://facebook.github.io/zstd/
+
+## lz4
+
+The [lz4 library][3] compression algorithm that uses very little CPU, though
+it also has the smallest compression ratio of other algorithms.  Installing
+this development library adds lz4 compression as an available compression
+algorithm.
+
+[3]: https://lz4.github.io/lz4/
+
+## openssl crypto
+
+The [openssl crypto library][4] provides some hardware accelerated checksum
+algorithms for MD4 and MD5.  Installing this development library makes rsync
+use the (potentially) faster checksum routines when computing MD4 & MD5
+checksums.
+
+[4]: https://www.openssl.org/docs/man1.0.2/man3/crypto.html
+
+## Package summary
+
+To help you get the libraries installed, here are some package install commands
+for various OSes.  The commands are split up to correspond with the above
+items, but feel free to combine the package names into a single install, if you
+like.
+
+ -  For Debian and Ubuntu (Debian Buster users may want to briefly(?) enable
+    buster-backports to update zstd from 1.3 to 1.4):
+
+    >     sudo apt install -y gcc g++ gawk autoconf automake python3-cmarkgfm
+    >     sudo apt install -y acl libacl1-dev
+    >     sudo apt install -y attr libattr1-dev
+    >     sudo apt install -y libxxhash-dev
+    >     sudo apt install -y libzstd-dev
+    >     sudo apt install -y liblz4-dev
+    >     sudo apt install -y libssl-dev
+
+Or run support/install_deps_ubuntu.sh
+
+ -  For CentOS (use EPEL for python3-pip):
+
+    >     sudo yum -y install epel-release
+    >     sudo yum -y install gcc g++ gawk autoconf automake python3-pip
+    >     sudo yum -y install acl libacl-devel
+    >     sudo yum -y install attr libattr-devel
+    >     sudo yum -y install xxhash-devel
+    >     sudo yum -y install libzstd-devel
+    >     sudo yum -y install lz4-devel
+    >     sudo yum -y install openssl-devel
+    >     python3 -mpip install --user commonmark
+
+ -  For Fedora 33:
+
+    >     sudo dnf -y install acl libacl-devel
+    >     sudo dnf -y install attr libattr-devel
+    >     sudo dnf -y install xxhash-devel
+    >     sudo dnf -y install libzstd-devel
+    >     sudo dnf -y install lz4-devel
+    >     sudo dnf -y install openssl-devel
+
+ -  For FreeBSD (this assumes that the python3 version is 3.7):
+
+    >     sudo pkg install -y autotools python3 py37-CommonMark
+    >     sudo pkg install -y xxhash
+    >     sudo pkg install -y zstd
+    >     sudo pkg install -y liblz4
+
+ -  For macOS:
+
+    >     brew install automake
+    >     brew install xxhash
+    >     brew install zstd
+    >     brew install lz4
+    >     brew install openssl
+
+ -  For Cygwin (with all cygwin programs stopped, run the appropriate setup program from a cmd shell):
+
+    >     setup-x86_64 --quiet-mode -P make,gawk,autoconf,automake,gcc-core,python38,python38-pip
+    >     setup-x86_64 --quiet-mode -P attr,libattr-devel
+    >     setup-x86_64 --quiet-mode -P libzstd-devel
+    >     setup-x86_64 --quiet-mode -P liblz4-devel
+    >     setup-x86_64 --quiet-mode -P libssl-devel
+
+    Sometimes cygwin has commonmark packaged and sometimes it doesn't. Now that
+    its python38 has stabilized, you could install python38-commonmark. Or just
+    avoid the issue by running this from a bash shell as your build user:
+
+    >     python3 -mpip install --user commonmark
+
+## Build and install
+
+After installing the various libraries, you need to configure, build, and
+install the source:
+
+>      ./configure
+>      make
+>      sudo make install
+
+The default install path is /usr/local/bin, but you can set the installation
+directory and other parameters using options to ./configure.  To see them, use:
+
+>     ./configure --help
+
+Configure tries to figure out if the local system uses group "nobody" or
+"nogroup" by looking in the /etc/group file.  (This is only used for the
+default group of an rsync daemon, which attempts to run with "nobody"
+user and group permissions.)  You can change the default user and group
+for the daemon by editing the NOBODY_USER and NOBODY_GROUP defines in
+config.h, or just override them in your /etc/rsyncd.conf file.
+
+As of 2.4.7, rsync uses Eric Troan's popt option-parsing library.  A
+cut-down copy of a recent release is included in the rsync distribution,
+and will be used if there is no popt library on your build host, or if
+the `--with-included-popt` option is passed to ./configure.
+
+If you configure using `--enable-maintainer-mode`, then rsync will try
+to pop up an xterm on DISPLAY=:0 if it crashes.  You might find this
+useful, but it should be turned off for production builds.
+
+If you want to automatically use a separate "build" directory based on
+the current git branch name, start with a pristine git checkout and run
+"mkdir auto-build-save" before you run the first ./configure command.
+That will cause a fresh build dir to spring into existence along with a
+special Makefile symlink that allows you to run "make" and "./configure"
+from the source dir (the "build" dir gets auto switched based on branch).
+This is helpful when using the branch-from-patch and patch-update scripts
+to maintain the official rsync patches.  If you ever need to build from
+a "detached head" git position then you'll need to manually chdir into
+the build dir to run make.  I also like to create 2 more symlinks in the
+source dir:  `ln -s build/rsync . ; ln -s build/testtmp .`
+
+## Make compatibility
+
+Note that Makefile.in has a rule that uses a wildcard in a prerequisite.  If
+your make has a problem with this rule, you will see an error like this:
+
+    Don't know how to make ./*.c
+
+You can change the "proto.h-tstamp" target in Makefile.in to list all the \*.c
+filenames explicitly in order to avoid this issue.
+
+## RPM notes
+
+Under packaging you will find .spec files for several distributions.
+The .spec file in packaging/lsb can be used for Linux systems that
+adhere to the Linux Standards Base (e.g., RedHat and others).
+
+## HP-UX notes
+
+The HP-UX 10.10 "bundled" C compiler seems not to be able to cope with
+ANSI C.  You may see this error message in config.log if ./configure
+fails:
+
+    (Bundled) cc: "configure", line 2162: error 1705: Function prototypes are an ANSI feature.
+
+Install gcc or HP's "ANSI/C Compiler".
+
+## Mac OS X notes
+
+Some versions of Mac OS X (Darwin) seem to have an IPv6 stack, but do
+not completely implement the "New Sockets" API.
+
+[This site][5] says that Apple started to support IPv6 in 10.2 (Jaguar).  If
+your build fails, try again after running configure with `--disable-ipv6`.
+
+Apple Silicon macs may install packages in a slightly different location and require flags.
+CFLAGS="-I /opt/homebrew/include" LDFLAGS="-L /opt/homebrew/lib"
+
+[5]: http://www.ipv6.org/impl/mac.html
+
+## IBM AIX notes
+
+IBM AIX has a largefile problem with mkstemp.  See IBM PR-51921.
+The workaround is to append the following to config.h:
+
+>     #ifdef _LARGE_FILES
+>     #undef HAVE_SECURE_MKSTEMP
+>     #endif

Makefile.in

@@ -1,56 +1,70 @@
-# Makefile for rsync. This is processed by configure to produce the final
-# Makefile
+# The Makefile for rsync (configure creates it from Makefile.in).
 
 prefix=@prefix@
 datarootdir=@datarootdir@
 exec_prefix=@exec_prefix@
 bindir=@bindir@
+libdir=@libdir@/rsync
 mandir=@mandir@
+with_rrsync=@with_rrsync@
 
 LIBS=@LIBS@
 CC=@CC@
+AWK=@AWK@
 CFLAGS=@CFLAGS@
 CPPFLAGS=@CPPFLAGS@
+CXX=@CXX@
+CXXFLAGS=@CXXFLAGS@
 EXEEXT=@EXEEXT@
 LDFLAGS=@LDFLAGS@
+LIBOBJDIR=lib/
 
 INSTALLCMD=@INSTALL@
 INSTALLMAN=@INSTALL@
 
 srcdir=@srcdir@
+MKDIR_P=@MKDIR_P@
 VPATH=$(srcdir)
 SHELL=/bin/sh
 
-VERSION=@VERSION@
-
 .SUFFIXES:
 .SUFFIXES: .c .o
 
-HEADERS=byteorder.h config.h errcode.h proto.h rsync.h ifuncs.h lib/pool_alloc.h
+ROLL_SIMD_x86_64=simd-checksum-x86_64.o
+ROLL_ASM_x86_64=simd-checksum-avx2.o
+MD5_ASM_x86_64=lib/md5-asm-x86_64.o
+
+GENFILES=configure.sh aclocal.m4 config.h.in rsync.1 rsync.1.html \
+	 rsync-ssl.1 rsync-ssl.1.html rsyncd.conf.5 rsyncd.conf.5.html \
+	 @GEN_RRSYNC@
+HEADERS=byteorder.h config.h errcode.h proto.h rsync.h ifuncs.h itypes.h inums.h \
+	lib/pool_alloc.h lib/mdigest.h lib/md-defines.h
 LIBOBJ=lib/wildmatch.o lib/compat.o lib/snprintf.o lib/mdfour.o lib/md5.o \
 	lib/permstring.o lib/pool_alloc.o lib/sysacls.o lib/sysxattrs.o @LIBOBJS@
-ZLIBOBJ=zlib/deflate.o zlib/inffast.o zlib/inflate.o zlib/inftrees.o \
+zlib_OBJS=zlib/deflate.o zlib/inffast.o zlib/inflate.o zlib/inftrees.o \
 	zlib/trees.o zlib/zutil.o zlib/adler32.o zlib/compress.o zlib/crc32.o
 OBJS1=flist.o rsync.o generator.o receiver.o cleanup.o sender.o exclude.o \
-	util.o main.o checksum.o match.o syscall.o log.o backup.o
+	util1.o util2.o main.o checksum.o match.o syscall.o android.o log.o backup.o delete.o
 OBJS2=options.o io.o compat.o hlink.o token.o uidlist.o socket.o hashtable.o \
-	fileio.o batch.o clientname.o chmod.o acls.o xattrs.o
-OBJS3=progress.o pipe.o
+	usage.o fileio.o batch.o clientname.o chmod.o acls.o xattrs.o
+OBJS3=progress.o pipe.o @MD5_ASM@ @ROLL_SIMD@ @ROLL_ASM@
 DAEMON_OBJ = params.o loadparm.o clientserver.o access.o connection.o authenticate.o
-popt_OBJS=popt/findme.o  popt/popt.o  popt/poptconfig.o \
-	popt/popthelp.o popt/poptparse.o
-OBJS=$(OBJS1) $(OBJS2) $(OBJS3) $(DAEMON_OBJ) $(LIBOBJ) $(ZLIBOBJ) @BUILD_POPT@
+popt_OBJS= popt/popt.o  popt/poptconfig.o \
+	popt/popthelp.o popt/poptparse.o popt/poptint.o
+OBJS=$(OBJS1) $(OBJS2) $(OBJS3) $(DAEMON_OBJ) $(LIBOBJ) @BUILD_ZLIB@ @BUILD_POPT@
 
-TLS_OBJ = tls.o syscall.o lib/compat.o lib/snprintf.o lib/permstring.o lib/sysxattrs.o @BUILD_POPT@
+TLS_OBJ = tls.o syscall.o android.o util2.o t_stub.o lib/compat.o lib/snprintf.o lib/permstring.o lib/sysxattrs.o @BUILD_POPT@
 
 # Programs we must have to run the test cases
 CHECK_PROGS = rsync$(EXEEXT) tls$(EXEEXT) getgroups$(EXEEXT) getfsdev$(EXEEXT) \
-	trimslash$(EXEEXT) t_unsafe$(EXEEXT) wildtest$(EXEEXT)
+	testrun$(EXEEXT) trimslash$(EXEEXT) t_unsafe$(EXEEXT) t_chmod_secure$(EXEEXT) \
+	t_secure_relpath$(EXEEXT) wildtest$(EXEEXT) simdtest$(EXEEXT)
 
-CHECK_SYMLINKS = testsuite/chown-fake.test testsuite/devices-fake.test
+CHECK_SYMLINKS = testsuite/chown-fake_test.py testsuite/devices-fake_test.py \
+	testsuite/xattrs-hlink_test.py testsuite/exclude-lsh_test.py
 
 # Objects for CHECK_PROGS to clean
-CHECK_OBJS=getgroups.o getfsdev.o t_stub.o t_unsafe.o trimslash.o wildtest.o
+CHECK_OBJS=tls.o testrun.o getgroups.o getfsdev.o t_stub.o t_unsafe.o t_chmod_secure.o t_secure_relpath.o trimslash.o wildtest.o
 
 # note that the -I. is needed to handle config.h when using VPATH
 .c.o:
@@ -58,90 +72,266 @@ CHECK_OBJS=getgroups.o getfsdev.o t_stub.o t_unsafe.o trimslash.o wildtest.o
 	$(CC) -I. -I$(srcdir) $(CFLAGS) $(CPPFLAGS) -c $< @CC_SHOBJ_FLAG@
 @OBJ_RESTORE@
 
-all: rsync$(EXEEXT)
+# NOTE: consider running "packaging/smart-make" instead of "make" to auto-handle
+# any changes to configure.sh and the main Makefile prior to a "make all".
+all: Makefile rsync$(EXEEXT) stunnel-rsyncd.conf @MAKE_RRSYNC@ @MAKE_MAN@
+.PHONY: all
 
+.PHONY: install
 install: all
-	-mkdir -p ${DESTDIR}${bindir}
-	${INSTALLCMD} ${INSTALL_STRIP} -m 755 rsync$(EXEEXT) ${DESTDIR}${bindir}
-	-mkdir -p ${DESTDIR}${mandir}/man1
-	-mkdir -p ${DESTDIR}${mandir}/man5
-	${INSTALLMAN} -m 644 $(srcdir)/rsync.1 ${DESTDIR}${mandir}/man1
-	${INSTALLMAN} -m 644 $(srcdir)/rsyncd.conf.5 ${DESTDIR}${mandir}/man5
+	-$(MKDIR_P) $(DESTDIR)$(bindir)
+	$(INSTALLCMD) $(INSTALL_STRIP) -m 755 rsync$(EXEEXT) $(DESTDIR)$(bindir)
+	$(INSTALLCMD) -m 755 $(srcdir)/rsync-ssl $(DESTDIR)$(bindir)
+	-$(MKDIR_P) $(DESTDIR)$(mandir)/man1
+	-$(MKDIR_P) $(DESTDIR)$(mandir)/man5
+	for fn in rsync.1 rsync-ssl.1; do \
+	    if test -f $$fn; then $(INSTALLMAN) -m 644 $$fn $(DESTDIR)$(mandir)/man1; \
+	    elif test -f $(srcdir)/$$fn; then $(INSTALLMAN) -m 644 $(srcdir)/$$fn $(DESTDIR)$(mandir)/man1; fi; \
+	done
+	for fn in rsyncd.conf.5; do \
+	    if test -f $$fn; then $(INSTALLMAN) -m 644 $$fn $(DESTDIR)$(mandir)/man5; \
+	    elif test -f $(srcdir)/$$fn; then $(INSTALLMAN) -m 644 $(srcdir)/$$fn $(DESTDIR)$(mandir)/man5; fi; \
+	done
+	if test "$(with_rrsync)" = yes; then \
+	    $(INSTALLCMD) -m 755 rrsync $(DESTDIR)$(bindir); \
+	    fn=rrsync.1; \
+	    if test -f $$fn; then $(INSTALLMAN) -m 644 $$fn $(DESTDIR)$(mandir)/man1; \
+	    elif test -f $(srcdir)/$$fn; then $(INSTALLMAN) -m 644 $(srcdir)/$$fn $(DESTDIR)$(mandir)/man1; fi; \
+	fi
+
+install-ssl-daemon: stunnel-rsyncd.conf
+	-$(MKDIR_P) $(DESTDIR)/etc/stunnel
+	$(INSTALLCMD) -m 644 stunnel-rsyncd.conf $(DESTDIR)/etc/stunnel/rsyncd.conf
+	@if ! ls /etc/rsync-ssl/certs/server.* >/dev/null 2>/dev/null; then \
+	    echo "Note that you'll need to install the certificate used by /etc/stunnel/rsyncd.conf"; \
+	fi
+
+install-all: install install-ssl-daemon
 
 install-strip:
 	$(MAKE) INSTALL_STRIP='-s' install
 
+.PHONY: uninstall
+uninstall:
+	rm -f $(DESTDIR)$(bindir)/rsync$(EXEEXT) $(DESTDIR)$(bindir)/rsync-ssl
+	rm -f $(DESTDIR)$(bindir)/rrsync
+	rm -f $(DESTDIR)$(mandir)/man1/rsync.1 $(DESTDIR)$(mandir)/man1/rsync-ssl.1
+	rm -f $(DESTDIR)$(mandir)/man1/rrsync.1
+	rm -f $(DESTDIR)$(mandir)/man5/rsyncd.conf.5
+
+.PHONY: uninstall-ssl-daemon
+uninstall-ssl-daemon:
+	rm -f $(DESTDIR)/etc/stunnel/rsyncd.conf
+
+.PHONY: uninstall-all
+uninstall-all: uninstall uninstall-ssl-daemon
+
 rsync$(EXEEXT): $(OBJS)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)
 
+rrsync: support/rrsync
+	cp -p $(srcdir)/support/rrsync rrsync
+
 $(OBJS): $(HEADERS)
+$(CHECK_OBJS): $(HEADERS)
+tls.o xattrs.o: lib/sysxattrs.h
+usage.o: version.h latest-year.h help-rsync.h help-rsyncd.h git-version.h default-cvsignore.h
+loadparm.o: default-dont-compress.h daemon-parm.h
 
 flist.o: rounding.h
 
-rounding.h: mkrounding$(EXEEXT)
-	./mkrounding$(EXEEXT) >rounding.h
+default-cvsignore.h default-dont-compress.h: rsync.1.md define-from-md.awk
+	$(AWK) -f $(srcdir)/define-from-md.awk -v hfile=$@ $(srcdir)/rsync.1.md
 
-mkrounding$(EXEEXT): mkrounding.c rsync.h
-	@sed '1,/^struct file_struct/d; /^}/,$$d' <$(srcdir)/rsync.h >mkrounding.h
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ -I. $(srcdir)/mkrounding.c
-	@rm mkrounding.h
+help-rsync.h help-rsyncd.h: rsync.1.md help-from-md.awk
+	$(AWK) -f $(srcdir)/help-from-md.awk -v hfile=$@ $(srcdir)/rsync.1.md
+
+daemon-parm.h: daemon-parm.txt daemon-parm.awk
+	$(AWK) -f $(srcdir)/daemon-parm.awk $(srcdir)/daemon-parm.txt
+
+rounding.h: rounding.c rsync.h proto.h
+	@for r in 0 1 3; do \
+	    if $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o rounding -DEXTRA_ROUNDING=$$r -I. $(srcdir)/rounding.c >rounding.out 2>&1; then \
+		echo "#define EXTRA_ROUNDING $$r" >rounding.h; \
+		if test -f "$$HOME/build_farm/build_test.fns"; then \
+		    echo "EXTRA_ROUNDING is $$r" >&2; \
+		fi; \
+		break; \
+	    fi; \
+	done
+	@rm -f rounding
+	@if test -f rounding.h; then : ; else \
+	    cat rounding.out 1>&2; \
+	    echo "Failed to create rounding.h!" 1>&2; \
+	    exit 1; \
+	fi
+	@rm -f rounding.out
+
+git-version.h: ALWAYS_RUN
+	$(srcdir)/mkgitver
+
+.PHONY: ALWAYS_RUN
+ALWAYS_RUN:
+
+simd-checksum-x86_64.o: simd-checksum-x86_64.cpp
+	@$(srcdir)/cmd-or-msg disable-roll-simd $(CXX) -I. $(CXXFLAGS) $(CPPFLAGS) -c -o $@ $(srcdir)/simd-checksum-x86_64.cpp
+
+simd-checksum-avx2.o: simd-checksum-avx2.S
+	@$(srcdir)/cmd-or-msg disable-roll-asm $(CC) $(CFLAGS) -I. @NOEXECSTACK@ -c -o $@ $(srcdir)/simd-checksum-avx2.S
+
+lib/md5-asm-x86_64.o: lib/md5-asm-x86_64.S lib/md-defines.h
+	@$(srcdir)/cmd-or-msg disable-md5-asm $(CC) -I. @NOEXECSTACK@ -c -o $@ $(srcdir)/lib/md5-asm-x86_64.S
 
 tls$(EXEEXT): $(TLS_OBJ)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(TLS_OBJ) $(LIBS)
 
+testrun$(EXEEXT): testrun.o
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ testrun.o
+
 getgroups$(EXEEXT): getgroups.o
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ getgroups.o $(LIBS)
 
 getfsdev$(EXEEXT): getfsdev.o
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ getfsdev.o $(LIBS)
 
-TRIMSLASH_OBJ = trimslash.o syscall.o lib/compat.o lib/snprintf.o
+TRIMSLASH_OBJ = trimslash.o syscall.o android.o util2.o t_stub.o lib/compat.o lib/snprintf.o
 trimslash$(EXEEXT): $(TRIMSLASH_OBJ)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(TRIMSLASH_OBJ) $(LIBS)
 
-T_UNSAFE_OBJ = t_unsafe.o syscall.o util.o t_stub.o lib/compat.o lib/snprintf.o
+T_UNSAFE_OBJ = t_unsafe.o syscall.o android.o util1.o util2.o t_stub.o lib/compat.o lib/snprintf.o lib/wildmatch.o
 t_unsafe$(EXEEXT): $(T_UNSAFE_OBJ)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(T_UNSAFE_OBJ) $(LIBS)
 
-gen:
-	cd $(srcdir) && $(MAKE) -f prepare-source.mak gen
+T_CHMOD_SECURE_OBJ = t_chmod_secure.o syscall.o android.o util1.o util2.o t_stub.o lib/compat.o lib/snprintf.o lib/wildmatch.o lib/permstring.o
+t_chmod_secure$(EXEEXT): $(T_CHMOD_SECURE_OBJ)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(T_CHMOD_SECURE_OBJ) $(LIBS)
 
-man:
-	cd $(srcdir) && $(MAKE) -f prepare-source.mak man
+T_SECURE_RELPATH_OBJ = t_secure_relpath.o syscall.o android.o util1.o util2.o t_stub.o lib/compat.o lib/snprintf.o lib/wildmatch.o lib/permstring.o
+t_secure_relpath$(EXEEXT): $(T_SECURE_RELPATH_OBJ)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(T_SECURE_RELPATH_OBJ) $(LIBS)
 
-proto:
-	cd $(srcdir) && $(MAKE) -f prepare-source.mak proto.h
+.PHONY: conf
+conf: configure.sh config.h.in
 
+.PHONY: gen
+gen: conf proto.h man git-version.h
+
+aclocal.m4: $(srcdir)/m4/*.m4
+	aclocal -I $(srcdir)/m4
+
+configure.sh config.h.in: configure.ac aclocal.m4
+	@if test -f configure.sh; then cp -p configure.sh configure.sh.old; else touch configure.sh.old; fi
+	@if test -f config.h.in; then cp -p config.h.in config.h.in.old; else touch config.h.in.old; fi
+	autoconf -o configure.sh
+	autoheader && touch config.h.in
+	@if diff configure.sh configure.sh.old >/dev/null 2>&1; then \
+	    echo "configure.sh is unchanged."; \
+	    rm configure.sh.old; \
+	else \
+	    echo "configure.sh has CHANGED."; \
+	fi
+	@if diff config.h.in config.h.in.old >/dev/null 2>&1; then \
+	    echo "config.h.in is unchanged."; \
+	    rm config.h.in.old; \
+	else \
+	    echo "config.h.in has CHANGED."; \
+	fi
+	@if test -f configure.sh.old || test -f config.h.in.old; then \
+	    if test "$(MAKECMDGOALS)" = reconfigure; then \
+		echo 'Continuing with "make reconfigure".'; \
+	    else \
+		echo 'You may need to run:'; \
+		echo '  make reconfigure'; \
+		exit 1; \
+	    fi \
+	fi
+
+.PHONY: reconfigure
+reconfigure: configure.sh
+	./config.status --recheck
+	./config.status
+
+.PHONY: restatus
+restatus:
+	./config.status
+
+Makefile: Makefile.in config.status configure.sh config.h.in
+	@if test -f Makefile; then cp -p Makefile Makefile.old; else touch Makefile.old; fi
+	@./config.status
+	@if diff Makefile Makefile.old >/dev/null 2>&1; then \
+	    echo "Makefile is unchanged."; \
+	    rm Makefile.old; \
+	else \
+	    if test "$(MAKECMDGOALS)" = reconfigure; then \
+		echo 'Continuing with "make reconfigure".'; \
+	    else \
+		echo "Makefile updated -- rerun your make command."; \
+		exit 1; \
+	    fi \
+	fi
+
+stunnel-rsyncd.conf: $(srcdir)/stunnel-rsyncd.conf.in Makefile
+	sed 's;\@bindir\@;$(bindir);g' <$(srcdir)/stunnel-rsyncd.conf.in >stunnel-rsyncd.conf
+
+.PHONY: proto
+proto: proto.h-tstamp
+
+proto.h: proto.h-tstamp
+	@if test -f proto.h; then :; else cp -p $(srcdir)/proto.h .; fi
+
+proto.h-tstamp: $(srcdir)/*.c $(srcdir)/lib/compat.c daemon-parm.h
+	$(AWK) -f $(srcdir)/mkproto.awk $(srcdir)/*.c $(srcdir)/lib/compat.c daemon-parm.h
+
+.PHONY: man
+man: rsync.1 rsync-ssl.1 rsyncd.conf.5 @MAKE_RRSYNC_1@
+
+rsync.1: rsync.1.md md-convert version.h Makefile
+	@$(srcdir)/maybe-make-man rsync.1.md
+
+rsync-ssl.1: rsync-ssl.1.md md-convert version.h Makefile
+	@$(srcdir)/maybe-make-man rsync-ssl.1.md
+
+rsyncd.conf.5: rsyncd.conf.5.md md-convert version.h Makefile
+	@$(srcdir)/maybe-make-man rsyncd.conf.5.md
+
+rrsync.1: support/rrsync.1.md md-convert Makefile
+	@$(srcdir)/maybe-make-man support/rrsync.1.md
+
+.PHONY: clean
 clean: cleantests
-	rm -f *~ $(OBJS) $(TLS_OBJ) $(CHECK_PROGS) $(CHECK_OBJS) $(CHECK_SYMLINKS) \
-		mkrounding mkrounding.h rounding.h
+	rm -f *~ $(OBJS) $(CHECK_PROGS) $(CHECK_OBJS) $(CHECK_SYMLINKS) @MAKE_RRSYNC@ \
+		git-version.h rounding rounding.h *.old rsync*.1 rsync*.5 @MAKE_RRSYNC_1@ \
+		*.html daemon-parm.h help-*.h default-*.h proto.h proto.h-tstamp
+	rm -f *.gcno *.gcda lib/*.gcno lib/*.gcda zlib/*.gcno zlib/*.gcda popt/*.gcno popt/*.gcda
+	rm -rf coverage coverage-tcp coverage-all coverage-fallback
 
+.PHONY: cleantests
 cleantests:
 	rm -rf ./testtmp*
 
 # We try to delete built files from both the source and build
 # directories, just in case somebody previously configured things in
 # the source directory.
+.PHONY: distclean
 distclean: clean
-	rm -f Makefile config.h config.status
-	rm -f $(srcdir)/Makefile $(srcdir)/config.h $(srcdir)/config.status
-
-	rm -f config.cache config.log
-	rm -f $(srcdir)/config.cache $(srcdir)/config.log
-
-	rm -f shconfig $(srcdir)/shconfig
+	for dir in $(srcdir) . ; do \
+	    (cd "$$dir" && rm -rf Makefile config.h config.status stunnel-rsyncd.conf \
+	     lib/dummy popt/dummy zlib/dummy config.cache config.log shconfig \
+	     $(GENFILES) autom4te.cache) ; \
+	done
 
 # this target is really just for my use. It only works on a limited
 # range of machines and is used to produce a list of potentially
 # dead (ie. unused) functions in the code. (tridge)
+.PHONY: finddead
 finddead:
 	nm *.o */*.o |grep 'U ' | awk '{print $$2}' | sort -u > nmused.txt
 	nm *.o */*.o |grep 'T ' | awk '{print $$3}' | sort -u > nmfns.txt
 	comm -13 nmused.txt nmfns.txt
+	@rm nmused.txt nmfns.txt
 
 # 'check' is the GNU name, 'test' is the name for everybody else :-)
-.PHONY: check test
-
+.PHONY: test
 test: check
 
 # There seems to be no standard way to specify some variables as
@@ -154,28 +344,147 @@ test: check
 # catch Bash-isms earlier even if we're running on GNU.  Of course, we
 # might lose in the future where POSIX diverges from old sh.
 
+# `make check` runs tests in parallel by default. Override with
+# `make check CHECK_J=1` (serial) or any other value.
+CHECK_J = 8
+
+# Parallelism for `make coverage`. Defaults to the same as CHECK_J: the
+# coverage build sets -fprofile-update=atomic (atomic in-memory counters) and
+# gcc's libgcov serializes the per-source .gcda read-modify-write merge with a
+# file lock, so concurrent rsync processes (incl. the forked sender/generator/
+# receiver) accumulate exactly -- verified by a count-linearity check (a hot
+# line accumulates identically at -j1 and -P16). Override with
+# `make coverage COVERAGE_J=1` if your libgcov does not lock .gcda merges.
+COVERAGE_J = $(CHECK_J)
+
+# Output directory and extra runtests.py flags for `make coverage`. The
+# `coverage-tcp` target reuses the coverage recipe with --use-tcp (real
+# loopback rsyncd, which exercises the TCP accept/auth path and the
+# require_tcp-only tests) and a separate output directory.
+COVERAGE_DIR = coverage
+COVERAGE_RUNFLAGS =
+
+# Bundled third-party code that rsync ships but does not own; excluded from the
+# coverage report so the percentages reflect rsync's own source. zlib/ and popt/
+# are wholly vendored; the named lib/ files are PostgreSQL (getaddrinfo) and ISC
+# (inet_ntop/inet_pton) / standalone (getpass) imports. The other lib/*.c
+# (md5, mdfour, wildmatch, permstring, pool_alloc, snprintf, sysacls, sysxattrs,
+# compat) are rsync's own and stay in the report.
+COVERAGE_EXCLUDE = -e '(^|/)zlib/' -e '(^|/)popt/' \
+	-e '(^|/)lib/(getaddrinfo|getpass|inet_ntop|inet_pton)\.'
+
+# Build everything the test suite needs (rsync + helper programs + symlinks)
+# WITHOUT running it. Used by CI jobs that invoke runtests.py directly with
+# custom options (e.g. the version-mix workflow's --rsync-bin2/--expect-result).
+.PHONY: check-progs
+check-progs: all $(CHECK_PROGS) $(CHECK_SYMLINKS)
+
+.PHONY: check
 check: all $(CHECK_PROGS) $(CHECK_SYMLINKS)
-	rsync_bin=`pwd`/rsync$(EXEEXT) $(srcdir)/runtests.sh
+	$(srcdir)/runtests.py --rsync-bin=`pwd`/rsync$(EXEEXT) -j $(CHECK_J)
 
+.PHONY: check29
 check29: all $(CHECK_PROGS) $(CHECK_SYMLINKS)
-	rsync_bin=`pwd`/rsync$(EXEEXT) $(srcdir)/runtests.sh --protocol=29
+	$(srcdir)/runtests.py --rsync-bin=`pwd`/rsync$(EXEEXT) -j $(CHECK_J) --protocol=29
 
-wildtest.o: wildtest.c lib/wildmatch.c rsync.h
+.PHONY: check30
+check30: all $(CHECK_PROGS) $(CHECK_SYMLINKS)
+	$(srcdir)/runtests.py --rsync-bin=`pwd`/rsync$(EXEEXT) -j $(CHECK_J) --protocol=30
+
+# Whole-suite gcov coverage report (HTML, with branch + decision coverage).
+# Requires a build configured with --enable-coverage and the `gcovr` tool
+# (pip install gcovr). Runs the suite in parallel (COVERAGE_J, default CHECK_J):
+# this is safe because the coverage build uses -fprofile-update=atomic and
+# libgcov locks the per-source .gcda during its merge, so concurrent rsync
+# processes accumulate exactly (see COVERAGE_J above). Use COVERAGE_J=1 if your
+# toolchain's libgcov does not lock .gcda merges.
+.PHONY: coverage
+coverage: all $(CHECK_PROGS) $(CHECK_SYMLINKS)
+	@case '$(CFLAGS)' in *--coverage*) ;; \
+	  *) echo "*** not a coverage build; reconfigure with --enable-coverage"; exit 1 ;; esac
+	@command -v gcovr >/dev/null 2>&1 || { echo "*** gcovr not found (pip install gcovr)"; exit 1; }
+	find . -name '*.gcda' -delete
+	@rc=0; $(srcdir)/runtests.py --rsync-bin=`pwd`/rsync$(EXEEXT) -j $(COVERAGE_J) $(COVERAGE_RUNFLAGS) || rc=$$?; \
+	  rm -rf $(COVERAGE_DIR) && mkdir -p $(COVERAGE_DIR); \
+	  gcovr --root $(srcdir) $(COVERAGE_EXCLUDE) --decisions --print-summary \
+	      --html-details -o $(COVERAGE_DIR)/index.html . || exit $$?; \
+	  echo "Coverage report written to $(COVERAGE_DIR)/index.html"; \
+	  if test $$rc != 0; then \
+	    echo "*** test suite FAILED (status $$rc) -- coverage report still written above"; \
+	  fi; \
+	  exit $$rc
+
+# Same as `make coverage` but with the daemon tests run over a real loopback
+# rsyncd (--use-tcp), into a separate report directory.
+.PHONY: coverage-tcp
+coverage-tcp:
+	$(MAKE) coverage COVERAGE_RUNFLAGS=--use-tcp COVERAGE_DIR=coverage-tcp
+
+# Comprehensive single report: run the suite under several configurations,
+# accumulating into the shared .gcda counters (NOT cleared between runs), then
+# emit one merged, rsync-scoped report. Covers the default (pipe) transport, the
+# protocol-29/30 compat branches, and the real-TCP daemon path (which also runs
+# the require_tcp-only tests). Run under sudo to additionally cover root-only
+# paths (devices, chown, use-chroot, protected-regular). Local target -- CI uses
+# the plain `coverage`/`coverage-tcp` targets.
+.PHONY: coverage-all
+coverage-all: all $(CHECK_PROGS) $(CHECK_SYMLINKS)
+	@case '$(CFLAGS)' in *--coverage*) ;; \
+	  *) echo "*** not a coverage build; reconfigure with --enable-coverage"; exit 1 ;; esac
+	@command -v gcovr >/dev/null 2>&1 || { echo "*** gcovr not found (pip install gcovr)"; exit 1; }
+	find . -name '*.gcda' -delete
+	@rc=0; \
+	  for cfg in '' '--protocol=30' '--protocol=29' '--use-tcp'; do \
+	    echo "===== coverage-all: runtests.py $$cfg ====="; \
+	    $(srcdir)/runtests.py --rsync-bin=`pwd`/rsync$(EXEEXT) -j $(COVERAGE_J) $$cfg || rc=$$?; \
+	  done; \
+	  rm -rf coverage-all && mkdir -p coverage-all; \
+	  gcovr --root $(srcdir) $(COVERAGE_EXCLUDE) --decisions --print-summary \
+	      --html-details -o coverage-all/index.html . || exit $$?; \
+	  echo "Merged coverage report written to coverage-all/index.html"; \
+	  if test $$rc != 0; then \
+	    echo "*** some suite runs FAILED (status $$rc) -- report still written above"; \
+	  fi; \
+	  exit $$rc
+
+# Coverage for the portable (non-openat2) resolver tier. Requires a SEPARATE
+# build configured with --enable-coverage --disable-openat2: its .gcno differ
+# from the openat2 build, so this report cannot be merged with the others.
+.PHONY: coverage-fallback
+coverage-fallback:
+	$(MAKE) coverage COVERAGE_DIR=coverage-fallback
+
+wildtest.o: wildtest.c t_stub.o lib/wildmatch.c rsync.h config.h
 wildtest$(EXEEXT): wildtest.o lib/compat.o lib/snprintf.o @BUILD_POPT@
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ wildtest.o lib/compat.o lib/snprintf.o @BUILD_POPT@ $(LIBS)
 
-testsuite/chown-fake.test:
-	ln -s chown.test $(srcdir)/testsuite/chown-fake.test
+simdtest$(EXEEXT): simd-checksum-x86_64.cpp $(HEADERS)
+	@if test x"@ROLL_SIMD@" != x; then \
+	    $(CXX) -I. $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS) -DTEST_SIMD_CHECKSUM1 \
+	        -o $@ $(srcdir)/simd-checksum-x86_64.cpp @ROLL_ASM@ $(LIBS); \
+	else \
+	    touch $@; \
+	fi
 
-testsuite/devices-fake.test:
-	ln -s devices.test $(srcdir)/testsuite/devices-fake.test
+testsuite/chown-fake_test.py:
+	ln -s chown_test.py $(srcdir)/testsuite/chown-fake_test.py
+
+testsuite/devices-fake_test.py:
+	ln -s devices_test.py $(srcdir)/testsuite/devices-fake_test.py
+
+testsuite/xattrs-hlink_test.py:
+	ln -s xattrs_test.py $(srcdir)/testsuite/xattrs-hlink_test.py
+
+testsuite/exclude-lsh_test.py:
+	ln -s exclude_test.py $(srcdir)/testsuite/exclude-lsh_test.py
 
 # This does *not* depend on building or installing: you can use it to
 # check a version installed from a binary or some other source tree,
 # if you want.
 
+.PHONY: installcheck
 installcheck: $(CHECK_PROGS) $(CHECK_SYMLINKS)
-	POSIXLY_CORRECT=1 TOOLDIR=`pwd` rsync_bin="$(bindir)/rsync$(EXEEXT)" srcdir="$(srcdir)" $(srcdir)/runtests.sh
+	$(srcdir)/runtests.py --rsync-bin="$(bindir)/rsync$(EXEEXT)" --srcdir="$(srcdir)" --tooldir=`pwd` -j $(CHECK_J)
 
 # TODO: Add 'dist' target; need to know which files will be included
 
@@ -184,21 +493,12 @@ installcheck: $(CHECK_PROGS) $(CHECK_SYMLINKS)
 splint:
 	splint +unixlib +gnuextensions -weak rsync.c
 
-
-rsync.dvi: doc/rsync.texinfo
-	texi2dvi -o $@ $<
-
-rsync.ps: rsync.dvi
-	dvips -ta4 -o $@ $<
-
-rsync.pdf: doc/rsync.texinfo
-	texi2dvi -o $@ --pdf $<
-
-
+.PHONY: doxygen
 doxygen:
 	cd $(srcdir) && rm dox/html/* && doxygen
 
 # for maintainers only
+.PHONY: doxygen-upload
 doxygen-upload:
 	rsync -avzv $(srcdir)/dox/html/ --delete \
-	samba.org:/home/httpd/html/rsync/doxygen/head/
+	$${RSYNC_SAMBA_HOST-samba.org}:/home/httpd/html/rsync/doxygen/head/

NEWS

@@ -1,223 +0,0 @@
-NEWS for rsync 3.0.0 (UNRELEASED)
-Protocol: 30 (changed)
-Changes since 2.6.9:
-
-  NOTABLE CHANGE IN BEHAVIOR:
-
-   - The handling of implied directories when using --relative has changed
-     to send them as directories (e.g. no implied dir is ever sent as a
-     symlink).  This avoids unexpected behavior and should not adversely
-     affect most people.  If you're one of those rare people who relied
-     upon having an implied dir be duplicated as a symlink, either specify
-     --keep-dirlinks or --no-implied-dirs.
-
-  BUG FIXES:
-
-    - Fixed the output of -ii when combined with one of the --*-dest options:
-      it now itemizes all the items, not just the changed ones.
-
-    - Made the output of all file types consistent when using a --*-dest
-      option.  Prior versions used to output too many creation events for
-      matching items.
-
-    - The code that waits for a child pid now handles being interrupted by a
-      signal.  This fixes a problem with the pre-xfer exec function not being
-      able to get the exit status from the script.
-
-    - A negated filter rule (with a '!' modifier) no longer loses the negation
-      when sending the filter rules to the remote rsync.
-
-    - Fixed a problem with the --out-format (aka --log-format) option %f:  it
-      would output superfluous directory information for a non-daemon rsync.
-
-    - Fixed a problem with -vv (double --verbose) and --stats when "pushing"
-      files (which includes local copies).  Version 2.6.9 would complete the
-      copy, but exit with an error when the receiver output its memory stats.
-
-    - If --password-file is used on a non-daemon transfer, rsync now complains
-      and exits.  This should help users figure out that they can't use this
-      option to control a remote shell's password prompt.
-
-    - Make sure that directory permissions of a newly-created destination
-      directory are handled right when --perms is left off.
-
-    - The itemized output of a newly-created destination directory is now
-      output as a creation event, not a change event.
-
-    - Improved --hard-link so that more corner cases are handled correctly
-      when combined with options such as --link-dest and/or --ignore-existing.
-
-    - The --append option no longer updates a file that has the same size.
-
-    - Fixed a bug when combining --backup and --backup-dir with --inplace:
-      any missing backup directories are now created.
-
-    - Fixed a bug when using --backup and --inplace with --whole-file or
-      --read-batch: backup files are actually created now.
-
-    - Starting up an extra copy of an rsync daemon does not delete the pidfile
-      for the running daemon -- if the pidfile exists, the extra program will
-      exit with an error.
-
-    - The daemon pidfile is checked and created sooner in the startup sequence.
-
-  ENHANCEMENTS:
-
-    - A new incremental-recursion algorithm is now used when rsync is talking
-      to another 3.x version.  This starts the transfer going more quickly
-      (before all the files have been found), and requires much less memory.
-      See the --recursive option in the manpage for some restrictions.
-
-    - Saved memory in the non-incremental-recursion algorithm for typical
-      option values (usually saving from 21-29 bytes per file).
-
-    - The default --delete algorithm is now --delete-during when talking to a
-      3.x rsync.  This is a faster scan than using --delete-before (which is
-      the default when talking to older rsync versions), and is compatible with
-      the new incremental recursion mode.
-
-    - Rsync now allows multiple remote-source args to be specified rather than
-      having to rely on a special space-splitting side-effect of the remote-
-      shell.  Additional remote args must specify the same host or have an
-      empty hostname, as seen here:  :file1  ::module/file2.  This means that
-      local use of brace expansion now works:  rsync -av host:path/{f1,f2} .
-
-    - Added the --delete-delay option, which is a more efficient way to delete
-      files at the end of the transfer without needing a separate delete pass.
-
-    - Added the --acls (-A) option to preserve Access Control Lists.  This is
-      an improved version of the prior patch that was available, and it even
-      supports OS X ACLs.  (If you need to have backward compatibility with
-      old, patched versions of rsync, apply the acls.diff file from the patches
-      dir.)
-
-    - Added the --xattrs (-X) option to preserver extended attributes.  This is
-      an improved version of the prior patch that was available.  (If you need
-      to have backward compatibility with old, patched versions of rsync, apply
-      the xattrs.diff file from the patches dir.)
-
-    - Added the --fake-super option that allows a non-super user to preserve
-      all attributes of a file by using a special extended-attribute idiom.
-      There is also an analogous "fake super" option for an rsync daemon.
-
-    - Added the --iconv option, which allows rsync to convert filenames from
-      one character-set to another during the transfer.  The default is to make
-      this feature available as long as your system has iconv_open().  If
-      compilation fails, specify --disable-iconv to configure, and then
-      rebuild.  If you want rsync to perform character-set conversions by
-      default, you can specify --enable-iconv=CONVERT_STRING with the default
-      value for the --iconv option that you wish to use.  For example,
-      --enable-iconv=. is a good choice.  See the rsync manpage for an
-      explanation of the --iconv option's settings.
-
-    - Added the --skip-compress=LIST option to override of the default list of
-      file suffixes that will not be compressed when using --compress.
-      
-    - The daemon's default for "dont compress" was extended to include:
-	  *.7z *.mp[34] *.mov *.avi *.ogg *.jpg *.jpeg
-      The matching routine was also optimized to run more quickly.
-
-    - The --max-delete option now outputs a warning if it skipped any file
-      deletions, including a count of how many deletions were skipped.  (Older
-      versions just silently stopped deleting things.)
-
-    - You may specify --max-delete=0 to a 3.0.0 client to request that it warn
-      about extraneous files without deleting anything.  If you're not sure
-      what version the client is, you can use the less-obvious --max-delete=-1,
-      as both old and new versions will treat that as the same request (though
-      older versions don't warn).
-
-    - The --hard-link option now uses less memory on both the sending and
-      receiving side for all protocol versions.  For protocol 30, the use of a
-      hashtable on the sending side allows us to more efficiently convey to the
-      receiver what files are linked together.  This reduces the amount of data
-      sent over the socket by a considerable margin (rather than adding more
-      data), and limits the in-memory storage of the device+inode information
-      to just the sending side for the new protocol 30, or to the receiving
-      side when speaking an older protocol (note that older rsync versions kept
-      the device+inode information on both sides).
-
-    - The filter rules now support a perishable ("p") modifier that marks rules
-      that should not have an effect in a directory that is being deleted.  e.g.
-      -f '-p .svn/' would only affect "live" .svn directories.
-
-    - If we get an error setting the time on a symlink, we don't complain about
-      it anymore (since some operating systems don't support that, and it's not
-      that important).
-
-    - Protocol 30 now uses MD5 checksums instead of MD4.
-
-    - If a daemon module's "path" value is not an absolute pathname, the code
-      now makes it absolute internally (making it work properly).
-
-    - Changed the --append option to not checksum the existing data in the
-      destination file, which speeds up file appending.
-
-    - Added the --append-verify option, which works like the older --append
-      option (verifying the existing data in the destination file).  For
-      compatibility with older rsync versions, any use of --append that is
-      talking protocol 29 or older will revert to the --append-verify method.
-
-    - Documented and extended the support for the RSYNC_CONNECT_PROG variable
-      that can be used to enhance the client side of a daemon connection.
-
-    - Added the --protect-args (-s) option, that tells rsync to send most of
-      the command-line args at the start of the transfer rather than as args
-      to the remote-shell command.  This protects them from space-splitting,
-      and only interprets basic wildcard special shell characters (*?[).
-
-    - Improved the dashes and double-quotes in the nroff manpage output.
-
-    - We now support a lot more --no-OPTION override options.
-
-  INTERNAL:
-
-    - The file-list sorting algorithm now uses a sort that keeps any same-
-      named items in the same order as they were specified.  This allows
-      rsync to always ensure that the first of the duplicates is the one
-      that will be included in the copy.  The new sort was also faster
-      than the glibc version of qsort() and mergesort() in my testing.
-
-    - Rsync now supports the transfer of 64-bit timestamps (time_t values).
-
-    - Fixed a build problem with older (2.x) versions of gcc.
-
-    - Added some isType() functions that make dealing with signed characters
-      easier without forcing variables via casts.
-
-    - Changed strcat/strcpy/sprintf function calls to use safer versions.
-
-    - Upgraded the included popt version to 1.10.2 and improved its use of
-      string-handling functions.
-
-    - Added missing prototypes for compatibility functions from the lib dir.
-
-    - Configure determines if iconv() has a const arg, allowing us to avoid a
-      compiler warning.
-
-    - Made the sending of some numbers more efficient for protocol 30.
-
-    - Make sure that a daemon process doesn't mind if the client was weird and
-      omitted the --server option.
-
-    - Improved the use of "const" on pointers.
-
-    - Improved J.W.'s pool_alloc routines to add a way of freeing older
-      sections of a pool's memory.
-
-  DEVELOPER RELATED:
-
-    - Rsync is now licensed under the GPLv3 or later.
-
-    - When running the tests, we now put our per-test temp dirs into a sub-
-      directory named testtmp (which is created, if missing).  This allows
-      someone to symlink the testtmp directory to another filesystem (which is
-      useful if the build dir's filesystem does not support ACLs and xattrs,
-      and another file system does).
-
-    - Rsync now has a way of handling protocol-version changes during the
-      development of a new protocol version.  This exchange of sub-version
-      info does not interfere with the {MIN,MAX}_PROTOCOL_VERSION checking
-      in older versions (since we'd quickly exceed the MAX_PROTOCOL_VERSION
-      if we incremented the main PROTOCOL_VERSION value for every minor
-      change during development).

README

@@ -1,127 +0,0 @@
-WHAT IS RSYNC?
---------------
-
-rsync is a replacement for scp/rcp that has many more features.
-
-rsync uses the "rsync algorithm" which provides a very fast method for
-bringing remote files into sync. It does this by sending just the
-differences in the files across the link, without requiring that both
-sets of files are present at one of the ends of the link beforehand.
-At first glance this may seem impossible because the calculation of
-diffs between two files normally requires local access to both
-files. 
-
-A technical report describing the rsync algorithm is included with
-this package. 
-
-
-USAGE
------
-
-Basically you use rsync just like rcp, but rsync has many additional
-options.  To get a complete list of supported options type
-
-  rsync --help
-
-and see the manual for more information.
-
-
-SETUP
------
-
-Rsync normally uses ssh or rsh for communication.  It does not need to
-be setuid and requires no special privileges for installation.  You
-must, however, have a working ssh or rsh system.  Using ssh is
-recommended for its security features.
-
-Alternatively, rsync can run in `daemon' mode, listening on a socket.
-This is generally used for public file distribution, although
-authentication and access control are available.
-
-To install rsync, first run the "configure" script. This will create a
-Makefile and config.h appropriate for your system. Then type
-"make". 
-
-Note that on some systems you will have to force configure not to use
-gcc because gcc may not support some features (such as 64 bit file
-offsets) that your system may support. Set the environment variable CC
-to the name of your native compiler before running configure in this
-case. 
-
-Once built put a copy of rsync in your search path on the local and
-remote systems (or use "make install"). That's it!
-
-RSYNC DAEMONS
--------------
-
-rsync can also talk to "rsync daemons" which can provide anonymous or
-authenticated rsync. See the rsyncd.conf(5) man page for details on how
-to setup an rsync daemon. See the rsync(1) man page for info on how to
-connect to an rsync daemon.
-
-
-MAILING LIST
-------------
-
-There is a mailing list for the discussion of rsync and its
-applications. It is open to anyone to join. I will announce new
-versions on this list. 
-
-To join the mailing list see the web page at http://lists.samba.org/
-
-To send mail to everyone on the list send it to rsync@lists.samba.org
-
-
-BUG REPORTS
------------
-
-If you have web access then please look at
-
-  http://rsync.samba.org/
-
-That page contains links to the current bug list, and information on
-how to report a bug well.  You might also like to try searching the
-internet for the error message you've received, or looking in the
-mailing list archives at
-
-  http://mail-archive.com/rsync@lists.samba.org/
-
-To send a bug report, follow the instructions on the bug-tracking
-page of the web site.
-
-If you don't have web access, email your bug report to
-rsync@lists.samba.org.
-
-
-CVS TREE
---------
-
-If you want to get the very latest version of rsync direct from the
-source code repository then you can use anonymous cvs. You will need a
-recent version of cvs then use the following commands:
-
-	cvs -d :pserver:cvs@pserver.samba.org:/cvsroot login
-	Password: cvs
-
-	cvs -d :pserver:cvs@pserver.samba.org:/cvsroot co rsync
-
-Look at the cvs documentation for more details.
-
-
-COPYRIGHT
----------
-
-rsync was originally written by Andrew Tridgell and has been improved
-by many developers around the world.  rsync may be used, modified and
-redistributed only under the terms of the GNU General Public License,
-found in the file COPYING in this distribution, or at 
-
-  http://www.fsf.org/licenses/gpl.html
-
-
-AVAILABILITY
-------------
-
-The main web site for rsync is http://rsync.samba.org/
-The main ftp site is ftp://rsync.samba.org/pub/rsync/
-This is also available as rsync://rsync.samba.org/rsyncftp/

README.md

@@ -0,0 +1,153 @@
+WHAT IS RSYNC?
+--------------
+
+Rsync is a fast and extraordinarily versatile file copying tool for
+both remote and local files.
+
+Rsync uses a delta-transfer algorithm which provides a very fast method
+for bringing remote files into sync.  It does this by sending just the
+differences in the files across the link, without requiring that both
+sets of files are present at one of the ends of the link beforehand.  At
+first glance this may seem impossible because the calculation of diffs
+between two files normally requires local access to both files.
+
+A technical report describing the rsync algorithm is included with this
+package.
+
+
+USAGE
+-----
+
+Basically you use rsync just like scp, but rsync has many additional
+options.  To get a complete list of supported options type:
+
+    rsync --help
+
+See the [manpage][0] for more detailed information.
+
+[0]: https://download.samba.org/pub/rsync/rsync.1
+
+BUILDING AND INSTALLING
+-----------------------
+
+If you need to build rsync yourself, check out the [INSTALL][1] page for
+information on what libraries and packages you can use to get the maximum
+features in your build.
+
+[1]: https://github.com/RsyncProject/rsync/blob/master/INSTALL.md
+
+SETUP
+-----
+
+Rsync normally uses ssh or rsh for communication with remote systems.
+It does not need to be setuid and requires no special privileges for
+installation.  You must, however, have a working ssh or rsh system.
+Using ssh is recommended for its security features.
+
+Alternatively, rsync can run in `daemon' mode, listening on a socket.
+This is generally used for public file distribution, although
+authentication and access control are available.
+
+To install rsync, first run the "configure" script.  This will create a
+Makefile and config.h appropriate for your system.  Then type "make".
+
+Note that on some systems you will have to force configure not to use
+gcc because gcc may not support some features (such as 64 bit file
+offsets) that your system may support.  Set the environment variable CC
+to the name of your native compiler before running configure in this
+case.
+
+Once built put a copy of rsync in your search path on the local and
+remote systems (or use "make install").  That's it!
+
+
+RSYNC DAEMONS
+-------------
+
+Rsync can also talk to "rsync daemons" which can provide anonymous or
+authenticated rsync.  See the rsyncd.conf(5) manpage for details on how
+to setup an rsync daemon.  See the rsync(1) manpage for info on how to
+connect to an rsync daemon.
+
+
+WEB SITE
+--------
+
+For more information, visit the [main rsync web site][2].
+
+[2]: https://rsync.samba.org/
+
+You'll find a FAQ list, downloads, resources, HTML versions of the
+manpages, etc.
+
+
+MAILING LISTS
+-------------
+
+There is a mailing list for the discussion of rsync and its applications
+that is open to anyone to join.  New releases are announced on this
+list, and there is also an announcement-only mailing list for those that
+want official announcements.  See the [mailing-list page][3] for full
+details.
+
+[3]: https://rsync.samba.org/lists.html
+
+
+DISCORD
+-------
+
+There is also an rsync [Discord server][d] for real-time chat about rsync
+and its development.
+
+[d]: https://discord.gg/Avfvy9zhdp
+
+
+BUG REPORTS
+-----------
+
+The [bug-tracking web page][4] has full details on bug reporting.
+
+[4]: https://rsync.samba.org/bug-tracking.html
+
+That page contains links to the current bug list, and information on how to
+do a good job when reporting a bug.  You might also like to try searching
+the Internet for the error message you've received, or looking in the
+[mailing list archives][5].
+
+[5]: https://mail-archive.com/rsync@lists.samba.org/
+
+To send a bug report, follow the instructions on the bug-tracking
+page of the web site.
+
+Alternately, email your bug report to <rsync@lists.samba.org>.
+
+For security issues please email details of the issue to <rsync.project@gmail.com>.
+
+GIT REPOSITORY
+--------------
+
+If you want to get the very latest version of rsync direct from the
+source code repository, then you will need to use git.  The git repo
+is hosted [on GitHub][6] and [on Samba's site][7].
+
+[6]: https://github.com/RsyncProject/rsync
+[7]: https://git.samba.org/?p=rsync.git;a=summary
+
+See [the download page][8] for full details on all the ways to grab the
+source.
+
+[8]: https://rsync.samba.org/download.html
+
+
+COPYRIGHT
+---------
+
+Rsync was originally written by Andrew Tridgell and Paul Mackerras.  Many
+people from around the world have helped to maintain and improve it.
+
+Rsync may be used, modified and redistributed only under the terms of
+the GNU General Public License, found in the file [COPYING][9] in this
+distribution, or at [the Free Software Foundation][10].
+
+[9]: https://github.com/RsyncProject/rsync/blob/master/COPYING
+[10]: https://www.fsf.org/licenses/gpl.html

SECURITY.md

@@ -0,0 +1,13 @@
+# Security Policy
+
+## Supported Versions
+
+Only the current release of the software is actively supported.  If you need
+help backporting fixes into an older release, feel free to ask.
+
+## Reporting a Vulnerability
+
+Email your vulnerability information to rsync's maintainer:
+
+  Rsync Project <rsync.project@gmail.com>
+

TODO

@@ -15,7 +15,6 @@ Create more granular verbosity					2003/05/15
 
 DOCUMENTATION --------------------------------------------------------
 Keep list of open issues and todos on the web site
-Perhaps redo manual as SGML
 
 LOGGING --------------------------------------------------------------
 Memory accounting
@@ -49,7 +48,7 @@ Create test makefile target for some tests
 
 RELATED PROJECTS -----------------------------------------------------
 rsyncsh
-http://rsync.samba.org/rsync-and-debian/
+https://rsync.samba.org/rsync-and-debian/
 rsyncable gzip patch
 rsyncsplit as alternative to real integration with gzip?
 reverse rsync over HTTP Range
@@ -66,8 +65,8 @@ Use chroot only if supported
   If running as non-root, then don't fail, just give a warning.
   (There was a thread about this a while ago?)
 
-    http://lists.samba.org/pipermail/rsync/2001-August/thread.html
-    http://lists.samba.org/pipermail/rsync/2001-September/thread.html
+    https://lists.samba.org/pipermail/rsync/2001-August/thread.html
+    https://lists.samba.org/pipermail/rsync/2001-September/thread.html
 
                       --          --
 
@@ -94,7 +93,7 @@ Handling IPv6 on old machines
   platforms that have a half-working implementation, so redefining
   these functions clashes with system headers, and leaving them out
   breaks.  This affects at least OSF/1, RedHat 5, and Cobalt, which
-  are moderately improtant.
+  are moderately important.
 
   Perhaps the simplest solution would be to have two different files
   implementing the same interface, and choose either the new or the
@@ -204,7 +203,7 @@ Create more granular verbosity					2003/05/15
   fine grained selection of statistical reporting and what
   actions are logged.
 
-  http://lists.samba.org/archive/rsync/2003-May/006059.html
+  https://lists.samba.org/archive/rsync/2003-May/006059.html
 
                       --          --
 
@@ -213,16 +212,6 @@ DOCUMENTATION --------------------------------------------------------
 
 Keep list of open issues and todos on the web site
 
-                      --          --
-
-
-Perhaps redo manual as SGML
-
-  The man page is getting rather large, and there is more information
-  that ought to be added.
-
-  TexInfo source is probably a dying format.
-
   Linuxdoc looks like the most likely contender.  I know DocBook is
   favoured by some people, but it's so bloody verbose, even with emacs
   support.
@@ -236,7 +225,7 @@ Memory accounting
 
   At exit, show how much memory was used for the file list, etc.
 
-  Also we do a wierd exponential-growth allocation in flist.c.  I'm
+  We also do a weird exponential-growth allocation in flist.c.  I'm
   not sure this makes sense with modern mallocs.  At any rate it will
   make us allocate a huge amount of memory for large file lists.
 
@@ -287,7 +276,7 @@ Perhaps flush stdout like syslog
 
   Perhaps flush stdout after each filename, so that people trying to
   monitor progress in a log file can do so more easily.  See
-  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=48108
+  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=48108
 
                       --          --
 
@@ -495,7 +484,7 @@ rsyncsh
                       --          --
 
 
-http://rsync.samba.org/rsync-and-debian/
+https://rsync.samba.org/rsync-and-debian/
 
 
                       --          --

access.c

@@ -2,7 +2,7 @@
  * Routines to authenticate access to a daemon (hosts allow/deny).
  *
  * Copyright (C) 1998 Andrew Tridgell
- * Copyright (C) 2004-2007 Wayne Davison
+ * Copyright (C) 2004-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,15 +19,58 @@
  */
 
 #include "rsync.h"
+#include "ifuncs.h"
+#ifdef HAVE_NETGROUP_H
+#include <netgroup.h>
+#endif
 
-static int match_hostname(char *host, char *tok)
+static int allow_forward_dns;
+
+extern const char undetermined_hostname[];
+
+static int match_hostname(const char **host_ptr, const char *addr, const char *tok)
 {
+	struct hostent *hp;
+	unsigned int i;
+	const char *host = *host_ptr;
+
 	if (!host || !*host)
 		return 0;
-	return wildmatch(tok, host);
+
+#ifdef HAVE_INNETGR
+	if (*tok == '@' && tok[1])
+		return innetgr(tok + 1, host, NULL, NULL);
+#endif
+
+	/* First check if the reverse-DNS-determined hostname matches. */
+	if (iwildmatch(tok, host))
+		return 1;
+
+	if (!allow_forward_dns)
+		return 0;
+
+	/* Fail quietly if tok is an address or wildcarded entry, not a simple hostname. */
+	if (!tok[strspn(tok, ".0123456789")] || tok[strcspn(tok, ":/*?[")])
+		return 0;
+
+	/* Now try forward-DNS on the token (config-specified hostname) and see if the IP matches. */
+	if (!(hp = gethostbyname(tok)))
+		return 0;
+
+	for (i = 0; hp->h_addr_list[i] != NULL; i++) {
+		if (strcmp(addr, inet_ntoa(*(struct in_addr*)(hp->h_addr_list[i]))) == 0) {
+			/* If reverse lookups are off, we'll use the conf-specified
+			 * hostname in preference to UNDETERMINED. */
+			if (host == undetermined_hostname)
+				*host_ptr = strdup(tok);
+			return 1;
+		}
+	}
+
+	return 0;
 }
 
-static int match_binary(char *b1, char *b2, char *mask, int addrlen)
+static int match_binary(const char *b1, const char *b2, const char *mask, int addrlen)
 {
 	int i;
 
@@ -56,7 +99,7 @@ static void make_mask(char *mask, int plen, int addrlen)
 	return;
 }
 
-static int match_address(char *addr, char *tok)
+static int match_address(const char *addr, char *tok)
 {
 	char *p;
 	struct addrinfo hints, *resa, *rest;
@@ -70,24 +113,16 @@ static int match_address(char *addr, char *tok)
 #endif
 	char mask[16];
 	char *a = NULL, *t = NULL;
-	unsigned int len;
 
 	if (!addr || !*addr)
 		return 0;
 
 	p = strchr(tok,'/');
-	if (p) {
+	if (p)
 		*p = '\0';
-		len = p - tok;
-	} else
-		len = strlen(tok);
 
-	/* Fail quietly if tok is a hostname (not an address) */
-	if (strspn(tok, ".0123456789") != len
-#ifdef INET6
-	    && strchr(tok, ':') == NULL
-#endif
-	) {
+	/* Fail quietly if tok is a hostname, not an address. */
+	if (tok[strspn(tok, ".0123456789")] && strchr(tok, ':') == NULL) {
 		if (p)
 			*p = '/';
 		return 0;
@@ -130,8 +165,7 @@ static int match_address(char *addr, char *tok)
 		break;
 
 #ifdef INET6
-	case PF_INET6:
-	    {
+	case PF_INET6: {
 		struct sockaddr_in6 *sin6a, *sin6t;
 
 		sin6a = (struct sockaddr_in6 *)resa->ai_addr;
@@ -143,20 +177,19 @@ static int match_address(char *addr, char *tok)
 		addrlen = 16;
 
 #ifdef HAVE_SOCKADDR_IN6_SCOPE_ID
-		if (sin6t->sin6_scope_id &&
-		    sin6a->sin6_scope_id != sin6t->sin6_scope_id) {
+		if (sin6t->sin6_scope_id && sin6a->sin6_scope_id != sin6t->sin6_scope_id) {
 			ret = 0;
 			goto out;
 		}
 #endif
 
 		break;
-	    }
+	}
 #endif
 	default:
-	    rprintf(FLOG, "unknown family %u\n", rest->ai_family);
-	    ret = 0;
-	    goto out;
+		rprintf(FLOG, "unknown family %u\n", rest->ai_family);
+		ret = 0;
+		goto out;
 	}
 
 	bits = -1;
@@ -210,20 +243,15 @@ static int match_address(char *addr, char *tok)
 	return ret;
 }
 
-static int access_match(char *list, char *addr, char *host)
+static int access_match(const char *list, const char *addr, const char **host_ptr)
 {
 	char *tok;
 	char *list2 = strdup(list);
 
-	if (!list2)
-		out_of_memory("access_match");
-
 	strlower(list2);
-	if (host)
-		strlower(host);
 
 	for (tok = strtok(list2, " ,\t"); tok; tok = strtok(NULL, " ,\t")) {
-		if (match_hostname(host, tok) || match_address(addr, tok)) {
+		if (match_hostname(host_ptr, addr, tok) || match_address(addr, tok)) {
 			free(list2);
 			return 1;
 		}
@@ -233,16 +261,21 @@ static int access_match(char *list, char *addr, char *host)
 	return 0;
 }
 
-int allow_access(char *addr, char *host, char *allow_list, char *deny_list)
+int allow_access(const char *addr, const char **host_ptr, int i)
 {
+	const char *allow_list = lp_hosts_allow(i);
+	const char *deny_list = lp_hosts_deny(i);
+
 	if (allow_list && !*allow_list)
 		allow_list = NULL;
 	if (deny_list && !*deny_list)
 		deny_list = NULL;
 
+	allow_forward_dns = lp_forward_lookup(i);
+
 	/* If we match an allow-list item, we always allow access. */
 	if (allow_list) {
-		if (access_match(allow_list, addr, host))
+		if (access_match(allow_list, addr, host_ptr))
 			return 1;
 		/* For an allow-list w/o a deny-list, disallow non-matches. */
 		if (!deny_list)
@@ -251,7 +284,7 @@ int allow_access(char *addr, char *host, char *allow_list, char *deny_list)
 
 	/* If we match a deny-list item (and got past any allow-list
 	 * items), we always disallow access. */
-	if (deny_list && access_match(deny_list, addr, host))
+	if (deny_list && access_match(deny_list, addr, host_ptr))
 		return 0;
 
 	/* Allow all other access. */

acls.c

@@ -3,7 +3,7 @@
  *
  * Copyright (C) 1996 Andrew Tridgell
  * Copyright (C) 1996 Paul Mackerras
- * Copyright (C) 2006 Wayne Davison
+ * Copyright (C) 2006-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -28,9 +28,11 @@ extern int dry_run;
 extern int am_root;
 extern int read_only;
 extern int list_only;
-extern int orig_umask;
+extern mode_t orig_umask;
 extern int numeric_ids;
 extern int inc_recurse;
+extern int preserve_devices;
+extern int preserve_specials;
 
 /* Flags used to indicate what items are being transmitted for an entry. */
 #define XMIT_USER_OBJ (1<<0)
@@ -46,7 +48,7 @@ extern int inc_recurse;
 /* When we send the access bits over the wire, we shift them 2 bits to the
  * left and use the lower 2 bits as flags (relevant only to a name entry).
  * This makes the protocol more efficient than sending a value that would
- * be likely to have its hightest bits set. */
+ * be likely to have its highest bits set. */
 #define XFLAG_NAME_FOLLOWS 0x0001u
 #define XFLAG_NAME_IS_USER 0x0002u
 
@@ -88,13 +90,26 @@ static const rsync_acl empty_rsync_acl = {
 static item_list access_acl_list = EMPTY_ITEM_LIST;
 static item_list default_acl_list = EMPTY_ITEM_LIST;
 
+static size_t prior_access_count = (size_t)-1;
+static size_t prior_default_count = (size_t)-1;
+
 /* === Calculations on ACL types === */
 
 static const char *str_acl_type(SMB_ACL_TYPE_T type)
 {
-	return type == SMB_ACL_TYPE_ACCESS ? "SMB_ACL_TYPE_ACCESS"
-	     : type == SMB_ACL_TYPE_DEFAULT ? "SMB_ACL_TYPE_DEFAULT"
-	     : "unknown SMB_ACL_TYPE_T";
+	switch (type) {
+	case SMB_ACL_TYPE_ACCESS:
+#ifdef HAVE_OSX_ACLS
+		return "ACL_TYPE_EXTENDED";
+#else
+		return "ACL_TYPE_ACCESS";
+#endif
+	case SMB_ACL_TYPE_DEFAULT:
+		return "ACL_TYPE_DEFAULT";
+	default:
+		break;
+	}
+	return "unknown ACL type!";
 }
 
 static int calc_sacl_entries(const rsync_acl *racl)
@@ -102,10 +117,11 @@ static int calc_sacl_entries(const rsync_acl *racl)
 	/* A System ACL always gets user/group/other permission entries. */
 	return racl->names.count
 #ifdef ACLS_NEED_MASK
-	     + 4;
+	     + 1
 #else
-	     + (racl->mask_obj != NO_ENTRY) + 3;
+	     + (racl->mask_obj != NO_ENTRY)
 #endif
+	     + 3;
 }
 
 /* Extracts and returns the permission bits from the ACL.  This cannot be
@@ -119,15 +135,21 @@ static int rsync_acl_get_perms(const rsync_acl *racl)
 
 /* Removes the permission-bit entries from the ACL because these
  * can be reconstructed from the file's mode. */
-static void rsync_acl_strip_perms(rsync_acl *racl)
+static void rsync_acl_strip_perms(stat_x *sxp)
 {
+	rsync_acl *racl = sxp->acc_acl;
+
 	racl->user_obj = NO_ENTRY;
 	if (racl->mask_obj == NO_ENTRY)
 		racl->group_obj = NO_ENTRY;
 	else {
-		if (racl->group_obj == racl->mask_obj)
+		int group_perms = (sxp->st.st_mode >> 3) & 7;
+		if (racl->group_obj == group_perms)
 			racl->group_obj = NO_ENTRY;
-		racl->mask_obj = NO_ENTRY;
+#ifndef HAVE_SOLARIS_ACLS
+		if (racl->names.count != 0 && racl->mask_obj == group_perms)
+			racl->mask_obj = NO_ENTRY;
+#endif
 	}
 	racl->other_obj = NO_ENTRY;
 }
@@ -146,8 +168,6 @@ static rsync_acl *create_racl(void)
 {
 	rsync_acl *racl = new(rsync_acl);
 
-	if (!racl)
-		out_of_memory("create_racl");
 	*racl = empty_rsync_acl;
 
 	return racl;
@@ -300,7 +320,7 @@ static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl)
 		ida->access = access;
 	}
 	if (rc) {
-		rsyserr(FERROR, errno, "unpack_smb_acl: %s()", errfun);
+		rsyserr(FERROR_XFER, errno, "unpack_smb_acl: %s()", errfun);
 		rsync_acl_free(racl);
 		return False;
 	}
@@ -310,14 +330,11 @@ static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl)
 	if (temp_ida_list.count) {
 #ifdef SMB_ACL_NEED_SORT
 		if (temp_ida_list.count > 1) {
-			qsort(temp_ida_list.items, temp_ida_list.count,
-			      sizeof (id_access), id_access_sorter);
+			qsort(temp_ida_list.items, temp_ida_list.count, sizeof (id_access), id_access_sorter);
 		}
 #endif
-		if (!(racl->names.idas = new_array(id_access, temp_ida_list.count)))
-			out_of_memory("unpack_smb_acl");
-		memcpy(racl->names.idas, temp_ida_list.items,
-		       temp_ida_list.count * sizeof (id_access));
+		racl->names.idas = new_array(id_access, temp_ida_list.count);
+		memcpy(racl->names.idas, temp_ida_list.items, temp_ida_list.count * sizeof (id_access));
 	} else
 		racl->names.idas = NULL;
 
@@ -326,15 +343,6 @@ static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl)
 	/* Truncate the temporary list now that its idas have been saved. */
 	temp_ida_list.count = 0;
 
-#ifdef ACLS_NEED_MASK
-	if (!racl->names.count && racl->mask_obj != NO_ENTRY) {
-		/* Throw away a superfluous mask, but mask off the
-		 * group perms with it first. */
-		racl->group_obj &= racl->mask_obj;
-		racl->mask_obj = NO_ENTRY;
-	}
-#endif
-
 	return True;
 }
 
@@ -356,7 +364,7 @@ static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl)
 static int store_access_in_entry(uint32 access, SMB_ACL_ENTRY_T entry)
 {
 	if (sys_acl_set_access_bits(entry, access)) {
-		rsyserr(FERROR, errno, "store_access_in_entry sys_acl_set_access_bits()");
+		rsyserr(FERROR_XFER, errno, "store_access_in_entry sys_acl_set_access_bits()");
 		return -1;
 	}
 	return 0;
@@ -375,7 +383,7 @@ static BOOL pack_smb_acl(SMB_ACL_T *smb_acl, const rsync_acl *racl)
 	SMB_ACL_ENTRY_T entry;
 
 	if (!(*smb_acl = sys_acl_init(calc_sacl_entries(racl)))) {
-		rsyserr(FERROR, errno, "pack_smb_acl: sys_acl_init()");
+		rsyserr(FERROR_XFER, errno, "pack_smb_acl: sys_acl_init()");
 		return False;
 	}
 
@@ -390,13 +398,10 @@ static BOOL pack_smb_acl(SMB_ACL_T *smb_acl, const rsync_acl *racl)
 			break;
 #endif
 		COE( sys_acl_create_entry,(smb_acl, &entry) );
-		COE( sys_acl_set_info,(entry,
-#ifdef SMB_ACL_NEED_SORT
-				       SMB_ACL_USER,
-#else
-				       ida->access & NAME_IS_USER ? SMB_ACL_USER : SMB_ACL_GROUP,
-#endif
-				       ida->access & ~NAME_IS_USER, ida->id) );
+		COE( sys_acl_set_info,
+		    (entry,
+		     ida->access & NAME_IS_USER ? SMB_ACL_USER : SMB_ACL_GROUP,
+		     ida->access & ~NAME_IS_USER, ida->id) );
 	}
 
 #ifndef HAVE_OSX_ACLS
@@ -413,7 +418,7 @@ static BOOL pack_smb_acl(SMB_ACL_T *smb_acl, const rsync_acl *racl)
 #ifdef ACLS_NEED_MASK
 	mask_bits = racl->mask_obj == NO_ENTRY ? racl->group_obj & ~NO_ENTRY : racl->mask_obj;
 	COE( sys_acl_create_entry,(smb_acl, &entry) );
-	COE( sys_acl_set_info,(entry, SMB_ACL_MASK, mask_bits, NULL) );
+	COE( sys_acl_set_info,(entry, SMB_ACL_MASK, mask_bits, 0) );
 #else
 	if (racl->mask_obj != NO_ENTRY) {
 		COE( sys_acl_create_entry,(smb_acl, &entry) );
@@ -427,14 +432,14 @@ static BOOL pack_smb_acl(SMB_ACL_T *smb_acl, const rsync_acl *racl)
 
 #ifdef DEBUG
 	if (sys_acl_valid(*smb_acl) < 0)
-		rprintf(FERROR, "pack_smb_acl: warning: system says the ACL I packed is invalid\n");
+		rprintf(FERROR_XFER, "pack_smb_acl: warning: system says the ACL I packed is invalid\n");
 #endif
 
 	return True;
 
   error_exit:
 	if (errfun) {
-		rsyserr(FERROR, errno, "pack_smb_acl %s()", errfun);
+		rsyserr(FERROR_XFER, errno, "pack_smb_acl %s()", errfun);
 	}
 	sys_acl_free_acl(*smb_acl);
 	return False;
@@ -479,19 +484,25 @@ static int get_rsync_acl(const char *fname, rsync_acl *racl,
 		if ((buf = get_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, &len)) == NULL)
 			return 0;
 		cnt = (len - 4*4) / (4+4);
-		if (len < 4*4 || len != (size_t)cnt*(4+4) + 4*4)
+		if (len < 4*4 || len != (size_t)cnt*(4+4) + 4*4) {
+			free(buf);
 			return -1;
+		}
 
 		racl->user_obj = IVAL(buf, 0);
+		if (racl->user_obj == NO_ENTRY)
+			racl->user_obj = (mode >> 6) & 7;
 		racl->group_obj = IVAL(buf, 4);
+		if (racl->group_obj == NO_ENTRY)
+			racl->group_obj = (mode >> 3) & 7;
 		racl->mask_obj = IVAL(buf, 8);
 		racl->other_obj = IVAL(buf, 12);
+		if (racl->other_obj == NO_ENTRY)
+			racl->other_obj = mode & 7;
 
 		if (cnt) {
 			char *bp = buf + 4*4;
-			id_access *ida;
-			if (!(ida = racl->names.idas = new_array(id_access, cnt)))
-				out_of_memory("get_rsync_acl");
+			id_access *ida = racl->names.idas = new_array(id_access, cnt);
 			racl->names.count = cnt;
 			for ( ; cnt--; ida++, bp += 4+4) {
 				ida->id = IVAL(bp, 0);
@@ -508,6 +519,7 @@ static int get_rsync_acl(const char *fname, rsync_acl *racl,
 
 		sys_acl_free_acl(sacl);
 		if (!ok) {
+			rsyserr(FERROR_XFER, errno, "get_acl: unpack_smb_acl(%s)", fname);
 			return -1;
 		}
 	} else if (no_acl_syscall_error(errno)) {
@@ -515,7 +527,7 @@ static int get_rsync_acl(const char *fname, rsync_acl *racl,
 		if (type == SMB_ACL_TYPE_ACCESS)
 			rsync_acl_fake_perms(racl, mode);
 	} else {
-		rsyserr(FERROR, errno, "get_acl: sys_acl_get_file(%s, %s)",
+		rsyserr(FERROR_XFER, errno, "get_acl: sys_acl_get_file(%s, %s)",
 			fname, str_acl_type(type));
 		return -1;
 	}
@@ -527,6 +539,24 @@ static int get_rsync_acl(const char *fname, rsync_acl *racl,
 int get_acl(const char *fname, stat_x *sxp)
 {
 	sxp->acc_acl = create_racl();
+
+	if (S_ISREG(sxp->st.st_mode) || S_ISDIR(sxp->st.st_mode)) {
+		/* Everyone supports this. */
+	} else if (S_ISLNK(sxp->st.st_mode)) {
+		return 0;
+	} else if (IS_SPECIAL(sxp->st.st_mode)) {
+#ifndef NO_SPECIAL_ACLS
+		if (!preserve_specials)
+#endif
+			return 0;
+	} else if (IS_DEVICE(sxp->st.st_mode)) {
+#ifndef NO_DEVICE_ACLS
+		if (!preserve_devices)
+#endif
+			return 0;
+	} else if (IS_MISSING_FILE(sxp->st))
+		return 0;
+
 	if (get_rsync_acl(fname, sxp->acc_acl, SMB_ACL_TYPE_ACCESS,
 			  sxp->st.st_mode) < 0) {
 		free_acl(sxp);
@@ -548,7 +578,7 @@ int get_acl(const char *fname, stat_x *sxp)
 /* === Send functions === */
 
 /* Send the ida list over the file descriptor. */
-static void send_ida_entries(const ida_entries *idal, int f)
+static void send_ida_entries(int f, const ida_entries *idal)
 {
 	id_access *ida;
 	size_t count = idal->count;
@@ -557,12 +587,12 @@ static void send_ida_entries(const ida_entries *idal, int f)
 
 	for (ida = idal->idas; count--; ida++) {
 		uint32 xbits = ida->access << 2;
-		char *name;
+		const char *name;
 		if (ida->access & NAME_IS_USER) {
 			xbits |= XFLAG_NAME_IS_USER;
-			name = add_uid(ida->id);
+			name = numeric_ids ? NULL : add_uid(ida->id);
 		} else
-			name = add_gid(ida->id);
+			name = numeric_ids ? NULL : add_gid(ida->id);
 		write_varint(f, ida->id);
 		if (inc_recurse && name) {
 			int len = strlen(name);
@@ -574,8 +604,8 @@ static void send_ida_entries(const ida_entries *idal, int f)
 	}
 }
 
-static void send_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type,
-			   item_list *racl_list, int f)
+static void send_rsync_acl(int f, rsync_acl *racl, SMB_ACL_TYPE_T type,
+			   item_list *racl_list)
 {
 	int ndx = find_matching_rsync_acl(racl, type, racl_list);
 
@@ -608,7 +638,7 @@ static void send_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type,
 		if (flags & XMIT_OTHER_OBJ)
 			write_varint(f, racl->other_obj);
 		if (flags & XMIT_NAME_LIST)
-			send_ida_entries(&racl->names, f);
+			send_ida_entries(f, &racl->names);
 
 		/* Give the allocated data to the new list object. */
 		*new_racl = *racl;
@@ -618,28 +648,28 @@ static void send_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type,
 
 /* Send the ACL from the stat_x structure down the indicated file descriptor.
  * This also frees the ACL data. */
-void send_acl(stat_x *sxp, int f)
+void send_acl(int f, stat_x *sxp)
 {
 	if (!sxp->acc_acl) {
 		sxp->acc_acl = create_racl();
 		rsync_acl_fake_perms(sxp->acc_acl, sxp->st.st_mode);
 	}
 	/* Avoid sending values that can be inferred from other data. */
-	rsync_acl_strip_perms(sxp->acc_acl);
+	rsync_acl_strip_perms(sxp);
 
-	send_rsync_acl(sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list, f);
+	send_rsync_acl(f, sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list);
 
 	if (S_ISDIR(sxp->st.st_mode)) {
 		if (!sxp->def_acl)
 			sxp->def_acl = create_racl();
 
-		send_rsync_acl(sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list, f);
+		send_rsync_acl(f, sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list);
 	}
 }
 
 /* === Receive functions === */
 
-static uint32 recv_acl_access(uchar *name_follows_ptr, int f)
+static uint32 recv_acl_access(int f, uchar *name_follows_ptr)
 {
 	uint32 access = read_varint(f);
 
@@ -656,7 +686,7 @@ static uint32 recv_acl_access(uchar *name_follows_ptr, int f)
 			access |= NAME_IS_USER;
 	} else if (am_root >= 0 && access & ~SMB_ACL_VALID_OBJ_BITS) {
 	  value_error:
-		rprintf(FERROR, "recv_acl_access: value out of range: %x\n",
+		rprintf(FERROR_XFER, "recv_acl_access: value out of range: %x\n",
 			access);
 		exit_cleanup(RERR_STREAMIO);
 	}
@@ -664,23 +694,18 @@ static uint32 recv_acl_access(uchar *name_follows_ptr, int f)
 	return access;
 }
 
-static uchar recv_ida_entries(ida_entries *ent, int f)
+static uchar recv_ida_entries(int f, ida_entries *ent)
 {
 	uchar computed_mask_bits = 0;
-	int i, count = read_varint(f);
-
-	if (count) {
-		if (!(ent->idas = new_array(id_access, count)))
-			out_of_memory("recv_ida_entries");
-	} else
-		ent->idas = NULL;
+	int i, count = read_varint_bounded(f, 0, MAX_WIRE_ACL_COUNT, "ACL count");
 
+	ent->idas = count ? new_array(id_access, count) : NULL;
 	ent->count = count;
 
 	for (i = 0; i < count; i++) {
 		uchar has_name;
 		id_t id = read_varint(f);
-		uint32 access = recv_acl_access(&has_name, f);
+		uint32 access = recv_acl_access(f, &has_name);
 
 		if (has_name) {
 			if (access & NAME_IS_USER)
@@ -688,7 +713,7 @@ static uchar recv_ida_entries(ida_entries *ent, int f)
 			else
 				id = recv_group_name(f, id, NULL);
 		} else if (access & NAME_IS_USER) {
-			if (inc_recurse && am_root && !numeric_ids)
+			if (inc_recurse && !numeric_ids)
 				id = match_uid(id);
 		} else {
 			if (inc_recurse && (!am_root || !numeric_ids))
@@ -703,7 +728,7 @@ static uchar recv_ida_entries(ida_entries *ent, int f)
 	return computed_mask_bits & ~NO_ENTRY;
 }
 
-static int recv_rsync_acl(item_list *racl_list, SMB_ACL_TYPE_T type, int f)
+static int recv_rsync_acl(int f, item_list *racl_list, SMB_ACL_TYPE_T type, mode_t mode)
 {
 	uchar computed_mask_bits = 0;
 	acl_duo *duo_item;
@@ -711,14 +736,14 @@ static int recv_rsync_acl(item_list *racl_list, SMB_ACL_TYPE_T type, int f)
 	int ndx = read_varint(f);
 
 	if (ndx < 0 || (size_t)ndx > racl_list->count) {
-		rprintf(FERROR, "recv_acl_index: %s ACL index %d > %d\n",
+		rprintf(FERROR_XFER, "recv_acl_index: %s ACL index %d > %d\n",
 			str_acl_type(type), ndx, (int)racl_list->count);
 		exit_cleanup(RERR_STREAMIO);
 	}
 
 	if (ndx != 0)
 		return ndx - 1;
-	
+
 	ndx = racl_list->count;
 	duo_item = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
 	duo_item->racl = empty_rsync_acl;
@@ -726,29 +751,30 @@ static int recv_rsync_acl(item_list *racl_list, SMB_ACL_TYPE_T type, int f)
 	flags = read_byte(f);
 
 	if (flags & XMIT_USER_OBJ)
-		duo_item->racl.user_obj = recv_acl_access(NULL, f);
+		duo_item->racl.user_obj = recv_acl_access(f, NULL);
 	if (flags & XMIT_GROUP_OBJ)
-		duo_item->racl.group_obj = recv_acl_access(NULL, f);
+		duo_item->racl.group_obj = recv_acl_access(f, NULL);
 	if (flags & XMIT_MASK_OBJ)
-		duo_item->racl.mask_obj = recv_acl_access(NULL, f);
+		duo_item->racl.mask_obj = recv_acl_access(f, NULL);
 	if (flags & XMIT_OTHER_OBJ)
-		duo_item->racl.other_obj = recv_acl_access(NULL, f);
+		duo_item->racl.other_obj = recv_acl_access(f, NULL);
 	if (flags & XMIT_NAME_LIST)
-		computed_mask_bits |= recv_ida_entries(&duo_item->racl.names, f);
+		computed_mask_bits |= recv_ida_entries(f, &duo_item->racl.names);
 
 #ifdef HAVE_OSX_ACLS
 	/* If we received a superfluous mask, throw it away. */
 	duo_item->racl.mask_obj = NO_ENTRY;
+	(void)mode;
+	(void)computed_mask_bits;
 #else
-	if (!duo_item->racl.names.count) {
-		/* If we received a superfluous mask, throw it away. */
-		if (duo_item->racl.mask_obj != NO_ENTRY) {
-			/* Mask off the group perms with it first. */
-			duo_item->racl.group_obj &= duo_item->racl.mask_obj | NO_ENTRY;
-			duo_item->racl.mask_obj = NO_ENTRY;
-		}
-	} else if (duo_item->racl.mask_obj == NO_ENTRY) /* Must be non-empty with lists. */
-		duo_item->racl.mask_obj = (computed_mask_bits | duo_item->racl.group_obj) & ~NO_ENTRY;
+	if (duo_item->racl.names.count && duo_item->racl.mask_obj == NO_ENTRY) {
+		/* Mask must be non-empty with lists. */
+		if (type == SMB_ACL_TYPE_ACCESS)
+			computed_mask_bits = (mode >> 3) & 7;
+		else
+			computed_mask_bits |= duo_item->racl.group_obj & ~NO_ENTRY;
+		duo_item->racl.mask_obj = computed_mask_bits;
+	}
 #endif
 
 	duo_item->sacl = NULL;
@@ -757,12 +783,12 @@ static int recv_rsync_acl(item_list *racl_list, SMB_ACL_TYPE_T type, int f)
 }
 
 /* Receive the ACL info the sender has included for this file-list entry. */
-void receive_acl(struct file_struct *file, int f)
+void receive_acl(int f, struct file_struct *file)
 {
-	F_ACL(file) = recv_rsync_acl(&access_acl_list, SMB_ACL_TYPE_ACCESS, f);
+	F_ACL(file) = recv_rsync_acl(f, &access_acl_list, SMB_ACL_TYPE_ACCESS, file->mode);
 
 	if (S_ISDIR(file->mode))
-		F_DIR_DEFACL(file) = recv_rsync_acl(&default_acl_list, SMB_ACL_TYPE_DEFAULT, f);
+		F_DIR_DEFACL(file) = recv_rsync_acl(f, &default_acl_list, SMB_ACL_TYPE_DEFAULT, 0);
 }
 
 static int cache_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, item_list *racl_list)
@@ -785,14 +811,45 @@ static int cache_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, item_list *racl
 
 /* Turn the ACL data in stat_x into cached ACL data, setting the index
  * values in the file struct. */
-void cache_acl(struct file_struct *file, stat_x *sxp)
+void cache_tmp_acl(struct file_struct *file, stat_x *sxp)
 {
-	F_ACL(file) = cache_rsync_acl(sxp->acc_acl,
-				      SMB_ACL_TYPE_ACCESS, &access_acl_list);
+	if (prior_access_count == (size_t)-1)
+		prior_access_count = access_acl_list.count;
+
+	F_ACL(file) = cache_rsync_acl(sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list);
 
 	if (S_ISDIR(sxp->st.st_mode)) {
-		F_DIR_DEFACL(file) = cache_rsync_acl(sxp->def_acl,
-				      SMB_ACL_TYPE_DEFAULT, &default_acl_list);
+		if (prior_default_count == (size_t)-1)
+			prior_default_count = default_acl_list.count;
+		F_DIR_DEFACL(file) = cache_rsync_acl(sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list);
+	}
+}
+
+static void uncache_duo_acls(item_list *duo_list, size_t start)
+{
+	acl_duo *duo_item = duo_list->items;
+	acl_duo *duo_start = duo_item + start;
+
+	duo_item += duo_list->count;
+	duo_list->count = start;
+
+	while (duo_item-- > duo_start) {
+		rsync_acl_free(&duo_item->racl);
+		if (duo_item->sacl)
+			sys_acl_free_acl(duo_item->sacl);
+	}
+}
+
+void uncache_tmp_acls(void)
+{
+	if (prior_access_count != (size_t)-1) {
+		uncache_duo_acls(&access_acl_list, prior_access_count);
+		prior_access_count = (size_t)-1;
+	}
+
+	if (prior_default_count != (size_t)-1) {
+		uncache_duo_acls(&default_acl_list, prior_default_count);
+		prior_default_count = (size_t)-1;
 	}
 }
 
@@ -841,12 +898,14 @@ static mode_t change_sacl_perms(SMB_ACL_T sacl, rsync_acl *racl, mode_t old_mode
 			COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
 			break;
 		case SMB_ACL_MASK:
+#ifndef HAVE_SOLARIS_ACLS
 #ifndef ACLS_NEED_MASK
 			/* mask is only empty when we don't need it. */
 			if (racl->mask_obj == NO_ENTRY)
 				break;
 #endif
 			COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
+#endif
 			break;
 		case SMB_ACL_OTHER:
 			COE2( store_access_in_entry,(mode & 7, entry) );
@@ -856,10 +915,10 @@ static mode_t change_sacl_perms(SMB_ACL_T sacl, rsync_acl *racl, mode_t old_mode
 	if (rc) {
 	  error_exit:
 		if (errfun) {
-			rsyserr(FERROR, errno, "change_sacl_perms: %s()",
+			rsyserr(FERROR_XFER, errno, "change_sacl_perms: %s()",
 				errfun);
 		}
-		return (mode_t)~0;
+		return (mode_t)-1;
 	}
 
 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
@@ -888,7 +947,7 @@ static int set_rsync_acl(const char *fname, acl_duo *duo_item,
 #endif
 			rc = sys_acl_delete_def_file(fname);
 		if (rc < 0) {
-			rsyserr(FERROR, errno, "set_acl: sys_acl_delete_def_file(%s)",
+			rsyserr(FERROR_XFER, errno, "set_acl: sys_acl_delete_def_file(%s)",
 				fname);
 			return -1;
 		}
@@ -923,18 +982,17 @@ static int set_rsync_acl(const char *fname, acl_duo *duo_item,
 		 && !pack_smb_acl(&duo_item->sacl, &duo_item->racl))
 			return -1;
 #ifdef HAVE_OSX_ACLS
-		mode = 0; /* eliminate compiler warning */
+		(void)mode; /* eliminate compiler warning */
 #else
 		if (type == SMB_ACL_TYPE_ACCESS) {
-			cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl,
-						     cur_mode, mode);
-			if (cur_mode == (mode_t)~0)
+			cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl, cur_mode, mode);
+			if (cur_mode == (mode_t)-1)
 				return 0;
 		}
 #endif
 		if (sys_acl_set_file(fname, type, duo_item->sacl) < 0) {
-			rsyserr(FERROR, errno, "set_acl: sys_acl_set_file(%s, %s)",
-			fname, str_acl_type(type));
+			rsyserr(FERROR_XFER, errno, "set_acl: sys_acl_set_file(%s, %s)",
+				fname, str_acl_type(type));
 			return -1;
 		}
 		if (type == SMB_ACL_TYPE_ACCESS)
@@ -944,17 +1002,17 @@ static int set_rsync_acl(const char *fname, acl_duo *duo_item,
 	return 0;
 }
 
-/* Set ACL on indicated filename.
+/* Given a fname, this sets extended access ACL entries, the default ACL (for a
+ * dir), and the regular mode bits on the file.  Call this with fname set to
+ * NULL to just check if the ACL is different.
  *
- * This sets extended access ACL entries and default ACL.  If convenient,
- * it sets permission bits along with the access ACL and signals having
- * done so by modifying sxp->st.st_mode.
+ * If the ACL operation has a side-effect of changing the file's mode, the
+ * sxp->st.st_mode value will be changed to match.
  *
- * Returns 1 for unchanged, 0 for changed, -1 for failed.  Call this
- * with fname set to NULL to just check if the ACL is unchanged. */
-int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp)
+ * Returns 0 for an unchanged ACL, 1 for changed, -1 for failed. */
+int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp, mode_t new_mode)
 {
-	int unchanged = 1;
+	int changed = 0;
 	int32 ndx;
 	BOOL eq;
 
@@ -968,18 +1026,18 @@ int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp)
 		acl_duo *duo_item = access_acl_list.items;
 		duo_item += ndx;
 		eq = sxp->acc_acl
-		  && rsync_acl_equal_enough(sxp->acc_acl, &duo_item->racl, file->mode);
+		  && rsync_acl_equal_enough(sxp->acc_acl, &duo_item->racl, new_mode);
 		if (!eq) {
-			unchanged = 0;
+			changed = 1;
 			if (!dry_run && fname
 			 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_ACCESS,
-					  sxp, file->mode) < 0)
-				unchanged = -1;
+					  sxp, new_mode) < 0)
+				return -1;
 		}
 	}
 
-	if (!S_ISDIR(sxp->st.st_mode))
-		return unchanged;
+	if (!S_ISDIR(new_mode))
+		return changed;
 
 	ndx = F_DIR_DEFACL(file);
 	if (ndx >= 0 && (size_t)ndx < default_acl_list.count) {
@@ -987,16 +1045,15 @@ int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp)
 		duo_item += ndx;
 		eq = sxp->def_acl && rsync_acl_equal(sxp->def_acl, &duo_item->racl);
 		if (!eq) {
-			if (unchanged > 0)
-				unchanged = 0;
+			changed = 1;
 			if (!dry_run && fname
 			 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_DEFAULT,
-					  sxp, file->mode) < 0)
-				unchanged = -1;
+					  sxp, new_mode) < 0)
+				return -1;
 		}
 	}
 
-	return unchanged;
+	return changed;
 }
 
 /* Non-incremental recursion needs to convert all the received IDs.
@@ -1039,21 +1096,23 @@ int default_perms_for_dir(const char *dir)
 	if (sacl == NULL) {
 		/* Couldn't get an ACL.  Darn. */
 		switch (errno) {
+		case EINVAL:
+			/* If SMB_ACL_TYPE_DEFAULT isn't valid, then the ACLs must be non-POSIX. */
+			break;
 #ifdef ENOTSUP
 		case ENOTSUP:
 #endif
 		case ENOSYS:
 			/* No ACLs are available. */
 			break;
-		case ENOENT:
-			if (dry_run) {
+		default:
+			if (dry_run && errno == ENOENT) {
 				/* We're doing a dry run, so the containing directory
 				 * wasn't actually created.  Don't worry about it. */
 				break;
 			}
-			/* Otherwise fall through. */
-		default:
-			rprintf(FERROR, "default_perms_for_dir: sys_acl_get_file(%s, %s): %s, falling back on umask\n",
+			rprintf(FWARNING,
+				"default_perms_for_dir: sys_acl_get_file(%s, %s): %s, falling back on umask\n",
 				dir, str_acl_type(SMB_ACL_TYPE_DEFAULT), strerror(errno));
 		}
 		return perms;
@@ -1064,14 +1123,14 @@ int default_perms_for_dir(const char *dir)
 	ok = unpack_smb_acl(sacl, &racl);
 	sys_acl_free_acl(sacl);
 	if (!ok) {
-		rprintf(FERROR, "default_perms_for_dir: unpack_smb_acl failed, falling back on umask\n");
+		rprintf(FWARNING, "default_perms_for_dir: unpack_smb_acl failed, falling back on umask\n");
 		return perms;
 	}
 
 	/* Apply the permission-bit entries of the default ACL, if any. */
 	if (racl.user_obj != NO_ENTRY) {
 		perms = rsync_acl_get_perms(&racl);
-		if (verbose > 2)
+		if (DEBUG_GTE(ACL, 1))
 			rprintf(FINFO, "got ACL-based default perms %o for directory %s\n", perms, dir);
 	}
 

android.c

@@ -0,0 +1,82 @@
+/*
+ * Android-specific helpers.
+ *
+ * openat2() usability probe
+ * -------------------------
+ * openat2(2) is invoked directly via syscall() because the C library lacked a
+ * wrapper for it for years.  Under a seccomp filter that uses
+ * SECCOMP_RET_TRAP -- as the Android application sandbox does -- a disallowed
+ * syscall raises SIGSYS and *kills the process* rather than failing with
+ * ENOSYS, so inspecting errno after the call is too late.  We therefore probe
+ * openat2() once, behind a temporary SIGSYS handler, so a trapped syscall is
+ * caught and secure_relative_open_linux() can fall back to the portable
+ * per-component O_NOFOLLOW resolver instead of the whole process dying.
+ *
+ * This is only needed on Android, so the probe body is compiled only there.
+ * __ANDROID__ is defined by Bionic's headers and reflects the *target*, not
+ * the build host: it is set both for NDK cross-compiles (from a Linux/macOS
+ * host) and for native Termux builds, and is unset on every other platform.
+ * That makes it a reliable compile-time switch for cross builds -- there is
+ * nothing to detect in configure.  Everywhere else openat2() is never
+ * seccomp-trapped to SIGSYS (a missing syscall simply returns ENOSYS), so
+ * openat2_usable() collapses to a constant 1 with no run-time cost.
+ */
+
+#include "rsync.h"
+
+#if defined(__ANDROID__) && defined(HAVE_OPENAT2)
+
+#include <setjmp.h>
+#include <sys/syscall.h>
+#include <linux/openat2.h>
+
+static sigjmp_buf openat2_probe_env;
+
+static void openat2_probe_handler(int signo)
+{
+	(void)signo;
+	siglongjmp(openat2_probe_env, 1);
+}
+
+#endif
+
+int openat2_usable(void)
+{
+#if defined(__ANDROID__) && defined(HAVE_OPENAT2)
+	static int cached = -1;
+	struct sigaction sa, old_sa;
+
+	if (cached >= 0)
+		return cached;
+
+	memset(&sa, 0, sizeof sa);
+	sa.sa_handler = openat2_probe_handler;
+	sigemptyset(&sa.sa_mask);
+	if (sigaction(SIGSYS, &sa, &old_sa) != 0)
+		return cached = 0;
+
+	if (sigsetjmp(openat2_probe_env, 1) != 0) {
+		/* SIGSYS delivered: openat2 is blocked by a seccomp filter. */
+		cached = 0;
+	} else {
+		struct open_how how;
+		int fd;
+		memset(&how, 0, sizeof how);
+		how.flags = O_RDONLY | O_DIRECTORY;
+		how.resolve = RESOLVE_BENEATH | RESOLVE_NO_MAGICLINKS;
+		fd = syscall(SYS_openat2, AT_FDCWD, ".", &how, sizeof how);
+		if (fd >= 0)
+			close(fd);
+		/* Usable only if the probe actually succeeded.  Any failure --
+		 * ENOSYS (kernel < 5.6), a seccomp SECCOMP_RET_ERRNO denial
+		 * (EPERM/EACCES), or EINVAL (RESOLVE_BENEATH unsupported) --
+		 * means we must fall back to the portable O_NOFOLLOW walk. */
+		cached = fd >= 0;
+	}
+
+	sigaction(SIGSYS, &old_sa, NULL);
+	return cached;
+#else
+	return 1;
+#endif
+}

authenticate.c

@@ -2,7 +2,7 @@
  * Support rsync daemon authentication.
  *
  * Copyright (C) 1998-2000 Andrew Tridgell
- * Copyright (C) 2002-2007 Wayne Davison
+ * Copyright (C) 2002-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,8 +19,12 @@
  */
 
 #include "rsync.h"
+#include "itypes.h"
+#include "ifuncs.h"
 
+extern int read_only;
 extern char *password_file;
+extern struct name_num_obj valid_auth_checksums;
 
 /***************************************************************************
 encode a buffer using base64 - simple and slow algorithm. null terminates
@@ -69,139 +73,13 @@ static void gen_challenge(const char *addr, char *challenge)
 	SIVAL(input, 20, tv.tv_usec);
 	SIVAL(input, 24, getpid());
 
-	sum_init(0);
+	len = sum_init(valid_auth_checksums.negotiated_nni, 0);
 	sum_update(input, sizeof input);
-	len = sum_end(digest);
+	sum_end(digest);
 
 	base64_encode(digest, len, challenge, 0);
 }
 
-
-/* Return the secret for a user from the secret file, null terminated.
- * Maximum length is len (not counting the null). */
-static int get_secret(int module, const char *user, char *secret, int len)
-{
-	const char *fname = lp_secrets_file(module);
-	STRUCT_STAT st;
-	int fd, ok = 1;
-	const char *p;
-	char ch, *s;
-
-	if (!fname || !*fname)
-		return 0;
-
-	if ((fd = open(fname, O_RDONLY)) < 0)
-		return 0;
-
-	if (do_stat(fname, &st) == -1) {
-		rsyserr(FLOG, errno, "stat(%s)", fname);
-		ok = 0;
-	} else if (lp_strict_modes(module)) {
-		if ((st.st_mode & 06) != 0) {
-			rprintf(FLOG, "secrets file must not be other-accessible (see strict modes option)\n");
-			ok = 0;
-		} else if (MY_UID() == 0 && st.st_uid != 0) {
-			rprintf(FLOG, "secrets file must be owned by root when running as root (see strict modes)\n");
-			ok = 0;
-		}
-	}
-	if (!ok) {
-		rprintf(FLOG, "continuing without secrets file\n");
-		close(fd);
-		return 0;
-	}
-
-	if (*user == '#') {
-		/* Reject attempt to match a comment. */
-		close(fd);
-		return 0;
-	}
-
-	/* Try to find a line that starts with the user name and a ':'. */
-	p = user;
-	while (1) {
-		if (read(fd, &ch, 1) != 1) {
-			close(fd);
-			return 0;
-		}
-		if (ch == '\n')
-			p = user;
-		else if (p) {
-			if (*p == ch)
-				p++;
-			else if (!*p && ch == ':')
-				break;
-			else
-				p = NULL;
-		}
-	}
-
-	/* Slurp the secret into the "secret" buffer. */
-	s = secret;
-	while (len > 0) {
-		if (read(fd, s, 1) != 1 || *s == '\n')
-			break;
-		if (*s == '\r')
-			continue;
-		s++;
-		len--;
-	}
-	*s = '\0';
-	close(fd);
-
-	return 1;
-}
-
-static const char *getpassf(const char *filename)
-{
-	STRUCT_STAT st;
-	char buffer[512], *p;
-	int fd, n, ok = 1;
-	const char *envpw = getenv("RSYNC_PASSWORD");
-
-	if (!filename)
-		return NULL;
-
-	if ((fd = open(filename,O_RDONLY)) < 0) {
-		rsyserr(FERROR, errno, "could not open password file \"%s\"",
-			filename);
-		if (envpw)
-			rprintf(FERROR, "falling back to RSYNC_PASSWORD environment variable.\n");
-		return NULL;
-	}
-
-	if (do_stat(filename, &st) == -1) {
-		rsyserr(FERROR, errno, "stat(%s)", filename);
-		ok = 0;
-	} else if ((st.st_mode & 06) != 0) {
-		rprintf(FERROR,"password file must not be other-accessible\n");
-		ok = 0;
-	} else if (MY_UID() == 0 && st.st_uid != 0) {
-		rprintf(FERROR,"password file must be owned by root when running as root\n");
-		ok = 0;
-	}
-	if (!ok) {
-		rprintf(FERROR,"continuing without password file\n");
-		if (envpw)
-			rprintf(FERROR, "using RSYNC_PASSWORD environment variable.\n");
-		close(fd);
-		return NULL;
-	}
-
-	if (envpw)
-		rprintf(FERROR, "RSYNC_PASSWORD environment variable ignored\n");
-
-	n = read(fd, buffer, sizeof buffer - 1);
-	close(fd);
-	if (n > 0) {
-		buffer[n] = '\0';
-		if ((p = strtok(buffer, "\n\r")) != NULL)
-			return strdup(p);
-	}
-
-	return NULL;
-}
-
 /* Generate an MD4 hash created from the combination of the password
  * and the challenge string and return it base64-encoded. */
 static void generate_hash(const char *in, const char *challenge, char *out)
@@ -209,14 +87,135 @@ static void generate_hash(const char *in, const char *challenge, char *out)
 	char buf[MAX_DIGEST_LEN];
 	int len;
 
-	sum_init(0);
+	len = sum_init(valid_auth_checksums.negotiated_nni, 0);
 	sum_update(in, strlen(in));
 	sum_update(challenge, strlen(challenge));
-	len = sum_end(buf);
+	sum_end(buf);
 
 	base64_encode(buf, len, out, 0);
 }
 
+/* Return the secret for a user from the secret file, null terminated.
+ * Maximum length is len (not counting the null). */
+static const char *check_secret(int module, const char *user, const char *group,
+				const char *challenge, const char *pass)
+{
+	char line[1024];
+	char pass2[MAX_DIGEST_LEN*2];
+	const char *fname = lp_secrets_file(module);
+	STRUCT_STAT st;
+	int ok = 1;
+	int user_len = strlen(user);
+	int group_len = group ? strlen(group) : 0;
+	char *err;
+	FILE *fh;
+
+	if (!fname || !*fname || (fh = fopen(fname, "r")) == NULL)
+		return "no secrets file";
+
+	if (do_fstat(fileno(fh), &st) == -1) {
+		rsyserr(FLOG, errno, "fstat(%s)", fname);
+		ok = 0;
+	} else if (lp_strict_modes(module)) {
+		if ((st.st_mode & 06) != 0) {
+			rprintf(FLOG, "secrets file must not be other-accessible (see strict modes option)\n");
+			ok = 0;
+		} else if (MY_UID() == ROOT_UID && st.st_uid != ROOT_UID) {
+			rprintf(FLOG, "secrets file must be owned by root when running as root (see strict modes)\n");
+			ok = 0;
+		}
+	}
+	if (!ok) {
+		fclose(fh);
+		return "ignoring secrets file";
+	}
+
+	if (*user == '#') {
+		/* Reject attempt to match a comment. */
+		fclose(fh);
+		return "invalid username";
+	}
+
+	/* Try to find a line that starts with the user (or @group) name and a ':'. */
+	err = "secret not found";
+	while ((user || group) && fgets(line, sizeof line, fh) != NULL) {
+		const char **ptr, *s = strtok(line, "\n\r");
+		int len;
+		if (!s)
+			continue;
+		if (*s == '@') {
+			ptr = &group;
+			len = group_len;
+			s++;
+		} else {
+			ptr = &user;
+			len = user_len;
+		}
+		if (!*ptr || strncmp(s, *ptr, len) != 0 || s[len] != ':')
+			continue;
+		generate_hash(s+len+1, challenge, pass2);
+		if (strcmp(pass, pass2) == 0) {
+			err = NULL;
+			break;
+		}
+		err = "password mismatch";
+		*ptr = NULL; /* Don't look for name again. */
+	}
+
+	fclose(fh);
+
+	force_memzero(line, sizeof line);
+	force_memzero(pass2, sizeof pass2);
+
+	return err;
+}
+
+static const char *getpassf(const char *filename)
+{
+	STRUCT_STAT st;
+	char buffer[512], *p;
+	int n;
+
+	if (!filename)
+		return NULL;
+
+	if (strcmp(filename, "-") == 0) {
+		n = fgets(buffer, sizeof buffer, stdin) == NULL ? -1 : (int)strlen(buffer);
+	} else {
+		int fd;
+
+		if ((fd = open(filename,O_RDONLY)) < 0) {
+			rsyserr(FERROR, errno, "could not open password file %s", filename);
+			exit_cleanup(RERR_SYNTAX);
+		}
+
+		if (do_stat(filename, &st) == -1) {
+			rsyserr(FERROR, errno, "stat(%s)", filename);
+			exit_cleanup(RERR_SYNTAX);
+		}
+		if ((st.st_mode & 06) != 0) {
+			rprintf(FERROR, "ERROR: password file must not be other-accessible\n");
+			exit_cleanup(RERR_SYNTAX);
+		}
+		if (MY_UID() == ROOT_UID && st.st_uid != ROOT_UID) {
+			rprintf(FERROR, "ERROR: password file must be owned by root when running as root\n");
+			exit_cleanup(RERR_SYNTAX);
+		}
+
+		n = read(fd, buffer, sizeof buffer - 1);
+		close(fd);
+	}
+
+	if (n > 0) {
+		buffer[n] = '\0';
+		if ((p = strtok(buffer, "\n\r")) != NULL)
+			return strdup(p);
+	}
+
+	rprintf(FERROR, "ERROR: failed to read a password from %s\n", filename);
+	exit_cleanup(RERR_SYNTAX);
+}
+
 /* Possibly negotiate authentication with the client.  Use "leader" to
  * start off the auth if necessary.
  *
@@ -229,19 +228,23 @@ char *auth_server(int f_in, int f_out, int module, const char *host,
 	char *users = lp_auth_users(module);
 	char challenge[MAX_DIGEST_LEN*2];
 	char line[BIGPATHBUFLEN];
-	char secret[512];
-	char pass2[MAX_DIGEST_LEN*2];
+	const char **auth_uid_groups = NULL;
+	int auth_uid_groups_cnt = -1;
+	const char *err = NULL;
+	int group_match = -1;
 	char *tok, *pass;
+	char opt_ch = '\0';
 
 	/* if no auth list then allow anyone in! */
 	if (!users || !*users)
 		return "";
 
+	negotiate_daemon_auth(f_out, 0);
 	gen_challenge(addr, challenge);
 
 	io_printf(f_out, "%s%s\n", leader, challenge);
 
-	if (!read_line_old(f_in, line, sizeof line)
+	if (!read_line_old(f_in, line, sizeof line, 0)
 	 || (pass = strchr(line, ' ')) == NULL) {
 		rprintf(FLOG, "auth failed on module %s from %s (%s): "
 			"invalid challenge response\n",
@@ -250,40 +253,94 @@ char *auth_server(int f_in, int f_out, int module, const char *host,
 	}
 	*pass++ = '\0';
 
-	if (!(users = strdup(users)))
-		out_of_memory("auth_server");
+	users = strdup(users);
 
 	for (tok = strtok(users, " ,\t"); tok; tok = strtok(NULL, " ,\t")) {
-		if (wildmatch(tok, line))
-			break;
+		char *opts;
+		/* See if the user appended :deny, :ro, or :rw. */
+		if ((opts = strchr(tok, ':')) != NULL) {
+			*opts++ = '\0';
+			opt_ch = isUpper(opts) ? toLower(opts) : *opts;
+			if (opt_ch == 'r') { /* handle ro and rw */
+				opt_ch = isUpper(opts+1) ? toLower(opts+1) : opts[1];
+				if (opt_ch == 'o')
+					opt_ch = 'r';
+				else if (opt_ch != 'w')
+					opt_ch = '\0';
+			} else if (opt_ch != 'd') /* if it's not deny, ignore it */
+				opt_ch = '\0';
+		} else
+			opt_ch = '\0';
+		if (*tok != '@') {
+			/* Match the username */
+			if (wildmatch(tok, line))
+				break;
+		} else {
+#ifdef HAVE_GETGROUPLIST
+			int j;
+			/* See if authorizing user is a real user, and if so, see
+			 * if it is in a group that matches tok+1 wildmat. */
+			if (auth_uid_groups_cnt < 0) {
+				item_list gid_list = EMPTY_ITEM_LIST;
+				uid_t auth_uid;
+				if (!user_to_uid(line, &auth_uid, False)
+				 || getallgroups(auth_uid, &gid_list) != NULL)
+					auth_uid_groups_cnt = 0;
+				else {
+					gid_t *gid_array = gid_list.items;
+					auth_uid_groups_cnt = gid_list.count;
+					auth_uid_groups = new_array(const char *, auth_uid_groups_cnt);
+					for (j = 0; j < auth_uid_groups_cnt; j++)
+						auth_uid_groups[j] = gid_to_group(gid_array[j]);
+				}
+			}
+			for (j = 0; j < auth_uid_groups_cnt; j++) {
+				if (auth_uid_groups[j] && wildmatch(tok+1, auth_uid_groups[j])) {
+					group_match = j;
+					break;
+				}
+			}
+			if (group_match >= 0)
+				break;
+#else
+			rprintf(FLOG, "your computer doesn't support getgrouplist(), so no @group authorization is possible.\n");
+#endif
+		}
 	}
+
 	free(users);
 
-	if (!tok) {
-		rprintf(FLOG, "auth failed on module %s from %s (%s): "
-			"unauthorized user\n",
-			lp_name(module), host, addr);
+	if (!tok)
+		err = "no matching rule";
+	else if (opt_ch == 'd')
+		err = "denied by rule";
+	else {
+		const char *group = group_match >= 0 ? auth_uid_groups[group_match] : NULL;
+		err = check_secret(module, line, group, challenge, pass);
+	}
+
+	force_memzero(challenge, sizeof challenge);
+	force_memzero(pass, strlen(pass));
+
+	if (auth_uid_groups) {
+		int j;
+		for (j = 0; j < auth_uid_groups_cnt; j++) {
+			if (auth_uid_groups[j])
+				free((char*)auth_uid_groups[j]);
+		}
+		free(auth_uid_groups);
+	}
+
+	if (err) {
+		rprintf(FLOG, "auth failed on module %s from %s (%s) for %s: %s\n",
+			lp_name(module), host, addr, line, err);
 		return NULL;
 	}
 
-	memset(secret, 0, sizeof secret);
-	if (!get_secret(module, line, secret, sizeof secret - 1)) {
-		memset(secret, 0, sizeof secret);
-		rprintf(FLOG, "auth failed on module %s from %s (%s): "
-			"missing secret for user \"%s\"\n",
-			lp_name(module), host, addr, line);
-		return NULL;
-	}
-
-	generate_hash(secret, challenge, pass2);
-	memset(secret, 0, sizeof secret);
-
-	if (strcmp(pass, pass2) != 0) {
-		rprintf(FLOG, "auth failed on module %s from %s (%s): "
-			"password mismatch\n",
-			lp_name(module), host, addr);
-		return NULL;
-	}
+	if (opt_ch == 'r')
+		read_only = 1;
+	else if (opt_ch == 'w')
+		read_only = 0;
 
 	return strdup(line);
 }
@@ -295,18 +352,19 @@ void auth_client(int fd, const char *user, const char *challenge)
 
 	if (!user || !*user)
 		user = "nobody";
+	negotiate_daemon_auth(-1, 1);
 
 	if (!(pass = getpassf(password_file))
 	 && !(pass = getenv("RSYNC_PASSWORD"))) {
 		/* XXX: cyeoh says that getpass is deprecated, because
 		 * it may return a truncated password on some systems,
 		 * and it is not in the LSB.
-                 *
-                 * Andrew Klein says that getpassphrase() is present
-                 * on Solaris and reads up to 256 characters.
-                 *
-                 * OpenBSD has a readpassphrase() that might be more suitable.
-                 */
+		 *
+		 * Andrew Klein says that getpassphrase() is present
+		 * on Solaris and reads up to 256 characters.
+		 *
+		 * OpenBSD has a readpassphrase() that might be more suitable.
+		 */
 		pass = getpass("Password: ");
 	}
 

backup.c

@@ -2,7 +2,7 @@
  * Backup handling code.
  *
  * Copyright (C) 1999 Andrew Tridgell
- * Copyright (C) 2003-2007 Wayne Davison
+ * Copyright (C) 2003-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,8 +19,8 @@
  */
 
 #include "rsync.h"
+#include "ifuncs.h"
 
-extern int verbose;
 extern int am_root;
 extern int preserve_acls;
 extern int preserve_xattrs;
@@ -34,199 +34,242 @@ extern char backup_dir_buf[MAXPATHLEN];
 extern char *backup_suffix;
 extern char *backup_dir;
 
-/* make a complete pathname for backup file */
+/* Returns -1 on error, 0 on missing dir, and 1 on present dir. */
+static int validate_backup_dir(void)
+{
+	STRUCT_STAT st;
+
+	if (do_lstat_at(backup_dir_buf, &st) < 0) {
+		if (errno == ENOENT)
+			return 0;
+		rsyserr(FERROR, errno, "backup lstat %s failed", backup_dir_buf);
+		return -1;
+	}
+	if (!S_ISDIR(st.st_mode)) {
+		int flags = get_del_for_flag(st.st_mode) | DEL_FOR_BACKUP | DEL_RECURSE;
+		if (delete_item(backup_dir_buf, st.st_mode, flags) == 0)
+			return 0;
+		return -1;
+	}
+	return 1;
+}
+
+/* Create a backup path from the given fname, putting the result into
+ * backup_dir_buf.  Any new directories (compared to the prior backup
+ * path) are ensured to exist as directories, replacing anything else
+ * that may be in the way (e.g. a symlink). */
+static BOOL copy_valid_path(const char *fname)
+{
+	const char *f;
+	int val;
+	BOOL ret = True;
+	stat_x sx;
+	char *b, *rel = backup_dir_buf + backup_dir_len, *name = rel;
+
+	for (f = fname, b = rel; *f && *f == *b; f++, b++) {
+		if (*b == '/')
+			name = b + 1;
+	}
+
+	if (stringjoin(rel, backup_dir_remainder, fname, backup_suffix, NULL) >= backup_dir_remainder) {
+		rprintf(FERROR, "backup filename too long\n");
+		*name = '\0';
+		return False;
+	}
+
+	for ( ; ; name = b + 1) {
+		if ((b = strchr(name, '/')) == NULL)
+			return True;
+		*b = '\0';
+
+		val = validate_backup_dir();
+		if (val == 0)
+			break;
+		if (val < 0) {
+			*name = '\0';
+			return False;
+		}
+
+		*b = '/';
+	}
+
+	init_stat_x(&sx);
+
+	for ( ; b; name = b + 1, b = strchr(name, '/')) {
+		*b = '\0';
+
+		while (do_mkdir_at(backup_dir_buf, ACCESSPERMS) < 0) {
+			if (errno == EEXIST) {
+				val = validate_backup_dir();
+				if (val > 0)
+					break;
+				if (val == 0)
+					continue;
+			} else
+				rsyserr(FERROR, errno, "backup mkdir %s failed", backup_dir_buf);
+			*name = '\0';
+			ret = False;
+			goto cleanup;
+		}
+
+		/* Try to transfer the directory settings of the actual dir
+		 * that the files are coming from. */
+		if (x_stat(rel, &sx.st, NULL) < 0)
+			rsyserr(FERROR, errno, "backup stat %s failed", full_fname(rel));
+		else {
+			struct file_struct *file;
+			if (!(file = make_file(rel, NULL, NULL, 0, NO_FILTERS)))
+				continue;
+#ifdef SUPPORT_ACLS
+			if (preserve_acls && !S_ISLNK(file->mode)) {
+				get_acl(rel, &sx);
+				cache_tmp_acl(file, &sx);
+				free_acl(&sx);
+			}
+#endif
+#ifdef SUPPORT_XATTRS
+			if (preserve_xattrs) {
+				get_xattr(rel, &sx);
+				cache_tmp_xattr(file, &sx);
+				free_xattr(&sx);
+			}
+#endif
+			set_file_attrs(backup_dir_buf, file, NULL, NULL, 0);
+			unmake_file(file);
+		}
+
+		*b = '/';
+	}
+
+  cleanup:
+
+#ifdef SUPPORT_ACLS
+	uncache_tmp_acls();
+#endif
+#ifdef SUPPORT_XATTRS
+	uncache_tmp_xattrs();
+#endif
+
+	return ret;
+}
+
+/* Make a complete pathname for backup file and verify any new path elements. */
 char *get_backup_name(const char *fname)
 {
 	if (backup_dir) {
-		if (stringjoin(backup_dir_buf + backup_dir_len, backup_dir_remainder,
-			       fname, backup_suffix, NULL) < backup_dir_remainder)
-			return backup_dir_buf;
-	} else {
-		if (stringjoin(backup_dir_buf, MAXPATHLEN,
-			       fname, backup_suffix, NULL) < MAXPATHLEN)
+		static int initialized = 0;
+		if (!initialized) {
+			int ret;
+			if (backup_dir_len > 1)
+				backup_dir_buf[backup_dir_len-1] = '\0';
+			ret = make_path(backup_dir_buf, 0);
+			if (backup_dir_len > 1)
+				backup_dir_buf[backup_dir_len-1] = '/';
+			if (ret < 0)
+				return NULL;
+			initialized = 1;
+		}
+		/* copy fname into backup_dir_buf while validating the dirs. */
+		if (copy_valid_path(fname))
 			return backup_dir_buf;
+		/* copy_valid_path() has printed an error message. */
+		return NULL;
 	}
 
+	if (stringjoin(backup_dir_buf, MAXPATHLEN, fname, backup_suffix, NULL) < MAXPATHLEN)
+		return backup_dir_buf;
+
 	rprintf(FERROR, "backup filename too long\n");
 	return NULL;
 }
 
-/* simple backup creates a backup with a suffix in the same directory */
-static int make_simple_backup(const char *fname)
+/* Has same return codes as make_backup(). */
+static inline int link_or_rename(const char *from, const char *to,
+				 BOOL prefer_rename, STRUCT_STAT *stp)
 {
-	int rename_errno;
-	const char *fnamebak = get_backup_name(fname);
-
-	if (!fnamebak)
-		return 0;
-
-	while (1) {
-		if (do_rename(fname, fnamebak) == 0) {
-			if (verbose > 1) {
-				rprintf(FINFO, "backed up %s to %s\n",
-					fname, fnamebak);
-			}
-			break;
-		}
-		/* cygwin (at least version b19) reports EINVAL */
-		if (errno == ENOENT || errno == EINVAL)
-			break;
-
-		rename_errno = errno;
-		if (errno == EISDIR && do_rmdir(fnamebak) == 0)
-			continue;
-		if (errno == ENOTDIR && do_unlink(fnamebak) == 0)
-			continue;
-
-		rsyserr(FERROR, rename_errno, "rename %s to backup %s",
-			fname, fnamebak);
-		errno = rename_errno;
-		return 0;
-	}
-
-	return 1;
-}
-
-
-/****************************************************************************
-Create a directory given an absolute path, perms based upon another directory
-path
-****************************************************************************/
-int make_bak_dir(const char *fullpath)
-{
-	char fbuf[MAXPATHLEN], *rel, *end, *p;
-	struct file_struct *file;
-	int len = backup_dir_len;
-	stat_x sx;
-
-	while (*fullpath == '.' && fullpath[1] == '/') {
-		fullpath += 2;
-		len -= 2;
-	}
-
-	if (strlcpy(fbuf, fullpath, sizeof fbuf) >= sizeof fbuf)
-		return -1;
-
-	rel = fbuf + len;
-	end = p = rel + strlen(rel);
-
-	/* Try to find an existing dir, starting from the deepest dir. */
-	while (1) {
-		if (--p == fbuf)
-			return -1;
-		if (*p == '/') {
-			*p = '\0';
-			if (mkdir_defmode(fbuf) == 0)
-				break;
-			if (errno != ENOENT) {
-				rsyserr(FERROR, errno,
-					"make_bak_dir mkdir %s failed",
-					full_fname(fbuf));
-				return -1;
-			}
-		}
-	}
-
-	/* Make all the dirs that we didn't find on the way here. */
-	while (1) {
-		if (p >= rel) {
-			/* Try to transfer the directory settings of the
-			 * actual dir that the files are coming from. */
-			if (x_stat(rel, &sx.st, NULL) < 0) {
-				rsyserr(FERROR, errno,
-					"make_bak_dir stat %s failed",
-					full_fname(rel));
-			} else {
-#ifdef SUPPORT_ACLS
-				sx.acc_acl = sx.def_acl = NULL;
+#ifdef SUPPORT_HARD_LINKS
+	if (!prefer_rename) {
+#ifndef CAN_HARDLINK_SYMLINK
+		if (S_ISLNK(stp->st_mode))
+			return 0; /* Use copy code. */
 #endif
-#ifdef SUPPORT_XATTRS
-				sx.xattr = NULL;
+#ifndef CAN_HARDLINK_SPECIAL
+		if (IS_SPECIAL(stp->st_mode) || IS_DEVICE(stp->st_mode))
+			return 0; /* Use copy code. */
 #endif
-				if (!(file = make_file(rel, NULL, NULL, 0, NO_FILTERS)))
-					continue;
-#ifdef SUPPORT_ACLS
-				if (preserve_acls && !S_ISLNK(file->mode)) {
-					get_acl(rel, &sx);
-					cache_acl(file, &sx);
-					free_acl(&sx);
-				}
-#endif
-#ifdef SUPPORT_XATTRS
-				if (preserve_xattrs) {
-					get_xattr(rel, &sx);
-					cache_xattr(file, &sx);
-					free_xattr(&sx);
-				}
-#endif
-				set_file_attrs(fbuf, file, NULL, NULL, 0);
-				unmake_file(file);
-			}
-		}
-		*p = '/';
-		p += strlen(p);
-		if (p == end)
-			break;
-		if (mkdir_defmode(fbuf) < 0) {
-			rsyserr(FERROR, errno, "make_bak_dir mkdir %s failed",
-				full_fname(fbuf));
-			return -1;
+		if (do_link_at(from, to) == 0) {
+			if (DEBUG_GTE(BACKUP, 1))
+				rprintf(FINFO, "make_backup: HLINK %s successful.\n", from);
+			return 2;
 		}
+		/* We prefer to rename a regular file rather than copy it. */
+		if (!S_ISREG(stp->st_mode) || errno == EEXIST || errno == EISDIR)
+			return 0;
 	}
-
-	return 0;
-}
-
-/* robustly move a file, creating new directory structures if necessary */
-static int robust_move(const char *src, char *dst)
-{
-	if (robust_rename(src, dst, NULL, 0755) < 0
-	 && (errno != ENOENT || make_bak_dir(dst) < 0
-	  || robust_rename(src, dst, NULL, 0755) < 0))
-		return -1;
-	return 0;
-}
-
-
-/* If we have a --backup-dir, then we get here from make_backup().
- * We will move the file to be deleted into a parallel directory tree. */
-static int keep_backup(const char *fname)
-{
-	stat_x sx;
-	struct file_struct *file;
-	char *buf;
-	int kept = 0;
-	int ret_code;
-
-	/* return if no file to keep */
-	if (x_lstat(fname, &sx.st, NULL) < 0)
+#endif
+	if (do_rename_at(from, to) == 0) {
+		if (stp->st_nlink > 1 && !S_ISDIR(stp->st_mode)) {
+			/* If someone has hard-linked the file into the backup
+			 * dir, rename() might return success but do nothing! */
+			robust_unlink(from); /* Just in case... */
+		}
+		if (DEBUG_GTE(BACKUP, 1))
+			rprintf(FINFO, "make_backup: RENAME %s successful.\n", from);
 		return 1;
-#ifdef SUPPORT_ACLS
-	sx.acc_acl = sx.def_acl = NULL;
-#endif
-#ifdef SUPPORT_XATTRS
-	sx.xattr = NULL;
-#endif
-
-	if (!(file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
-		return 1; /* the file could have disappeared */
-
-	if (!(buf = get_backup_name(fname))) {
-		unmake_file(file);
-		return 0;
 	}
+	return 0;
+}
+
+/* Hard-link, rename, or copy an item to the backup name.  Returns 0 for
+ * failure, 1 if item was moved, 2 if item was duplicated or hard linked
+ * into backup area, or 3 if item doesn't exist or isn't a regular file. */
+int make_backup(const char *fname, BOOL prefer_rename)
+{
+	stat_x sx;
+	struct file_struct *file;
+	int save_preserve_xattrs;
+	char *buf;
+	int ret = 0;
+
+	init_stat_x(&sx);
+	/* Return success if no file to keep. */
+	if (x_lstat(fname, &sx.st, NULL) < 0)
+		return 3;
+
+	if (!(buf = get_backup_name(fname)))
+		return 0;
+
+	/* Try a hard-link or a rename first.  Using rename is not atomic, but
+	 * is more efficient than forcing a copy for larger files when no hard-
+	 * linking is possible. */
+	if ((ret = link_or_rename(fname, buf, prefer_rename, &sx.st)) != 0)
+		goto success;
+	if (errno == EEXIST || errno == EISDIR) {
+		STRUCT_STAT bakst;
+		if (do_lstat_at(buf, &bakst) == 0) {
+			int flags = get_del_for_flag(bakst.st_mode) | DEL_FOR_BACKUP | DEL_RECURSE;
+			if (delete_item(buf, bakst.st_mode, flags) != 0)
+				return 0;
+		}
+		if ((ret = link_or_rename(fname, buf, prefer_rename, &sx.st)) != 0)
+			goto success;
+	}
+
+	/* Fall back to making a copy. */
+	if (!(file = make_file(fname, NULL, &sx.st, 0, NO_FILTERS)))
+		return 3; /* the file could have disappeared */
 
 #ifdef SUPPORT_ACLS
 	if (preserve_acls && !S_ISLNK(file->mode)) {
 		get_acl(fname, &sx);
-		cache_acl(file, &sx);
+		cache_tmp_acl(file, &sx);
 		free_acl(&sx);
 	}
 #endif
 #ifdef SUPPORT_XATTRS
 	if (preserve_xattrs) {
 		get_xattr(fname, &sx);
-		cache_xattr(file, &sx);
+		cache_tmp_xattr(file, &sx);
 		free_xattr(&sx);
 	}
 #endif
@@ -234,95 +277,79 @@ static int keep_backup(const char *fname)
 	/* Check to see if this is a device file, or link */
 	if ((am_root && preserve_devices && IS_DEVICE(file->mode))
 	 || (preserve_specials && IS_SPECIAL(file->mode))) {
-		uint32 *devp = F_RDEV_P(file);
-		dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
-		do_unlink(buf);
-		if (do_mknod(buf, file->mode, rdev) < 0
-		    && (errno != ENOENT || make_bak_dir(buf) < 0
-		     || do_mknod(buf, file->mode, rdev) < 0)) {
-			rsyserr(FERROR, errno, "mknod %s failed",
-				full_fname(buf));
-		} else if (verbose > 2) {
-			rprintf(FINFO, "make_backup: DEVICE %s successful.\n",
-				fname);
-		}
-		kept = 1;
-		do_unlink(fname);
-	}
-
-	if (!kept && S_ISDIR(file->mode)) {
-		/* make an empty directory */
-		if (do_mkdir(buf, file->mode) < 0
-		    && (errno != ENOENT || make_bak_dir(buf) < 0
-		     || do_mkdir(buf, file->mode) < 0)) {
-			rsyserr(FINFO, errno, "mkdir %s failed",
-				full_fname(buf));
-		}
-
-		ret_code = do_rmdir(fname);
-		if (verbose > 2) {
-			rprintf(FINFO, "make_backup: RMDIR %s returns %i\n",
-				full_fname(fname), ret_code);
-		}
-		kept = 1;
+		if (do_mknod_at(buf, file->mode, sx.st.st_rdev) < 0)
+			rsyserr(FERROR, errno, "mknod %s failed", full_fname(buf));
+		else if (DEBUG_GTE(BACKUP, 1))
+			rprintf(FINFO, "make_backup: DEVICE %s successful.\n", fname);
+		ret = 2;
 	}
 
 #ifdef SUPPORT_LINKS
-	if (!kept && preserve_links && S_ISLNK(file->mode)) {
+	if (!ret && preserve_links && S_ISLNK(file->mode)) {
 		const char *sl = F_SYMLINK(file);
-		if (safe_symlinks && unsafe_symlink(sl, buf)) {
-			if (verbose) {
-				rprintf(FINFO, "ignoring unsafe symlink %s -> %s\n",
-					full_fname(buf), sl);
+		if (safe_symlinks && unsafe_symlink(sl, fname)) {
+			if (INFO_GTE(SYMSAFE, 1)) {
+				rprintf(FINFO, "not backing up unsafe symlink \"%s\" -> \"%s\"\n",
+					fname, sl);
 			}
-			kept = 1;
+			ret = 2;
 		} else {
-			do_unlink(buf);
-			if (do_symlink(sl, buf) < 0
-			    && (errno != ENOENT || make_bak_dir(buf) < 0
-			     || do_symlink(sl, buf) < 0)) {
-				rsyserr(FERROR, errno, "link %s -> \"%s\"",
-					full_fname(buf), sl);
-			}
-			do_unlink(fname);
-			kept = 1;
+			if (do_symlink_at(sl, buf) < 0)
+				rsyserr(FERROR, errno, "link %s -> \"%s\"", full_fname(buf), sl);
+			else if (DEBUG_GTE(BACKUP, 1))
+				rprintf(FINFO, "make_backup: SYMLINK %s successful.\n", fname);
+			ret = 2;
 		}
 	}
 #endif
 
-	if (!kept && !S_ISREG(file->mode)) {
-		rprintf(FINFO, "make_bak: skipping non-regular file %s\n",
-			fname);
+	if (!ret && !S_ISREG(file->mode)) {
+		if (INFO_GTE(NONREG, 1))
+			rprintf(FINFO, "make_bak: skipping non-regular file %s\n", fname);
 		unmake_file(file);
-		return 1;
+#ifdef SUPPORT_ACLS
+		uncache_tmp_acls();
+#endif
+#ifdef SUPPORT_XATTRS
+		uncache_tmp_xattrs();
+#endif
+		return 3;
 	}
 
-	/* move to keep tree if a file */
-	if (!kept) {
-		if (robust_move(fname, buf) != 0) {
+	/* Copy to backup tree if a file. */
+	if (!ret) {
+		if (copy_file(fname, buf, -1, file->mode) < 0) {
 			rsyserr(FERROR, errno, "keep_backup failed: %s -> \"%s\"",
 				full_fname(fname), buf);
-		} else if (sx.st.st_nlink > 1) {
-			/* If someone has hard-linked the file into the backup
-			 * dir, rename() might return success but do nothing! */
-			robust_unlink(fname); /* Just in case... */
+			unmake_file(file);
+#ifdef SUPPORT_ACLS
+			uncache_tmp_acls();
+#endif
+#ifdef SUPPORT_XATTRS
+			uncache_tmp_xattrs();
+#endif
+			return 0;
 		}
+		if (DEBUG_GTE(BACKUP, 1))
+			rprintf(FINFO, "make_backup: COPY %s successful.\n", fname);
+		ret = 2;
 	}
-	set_file_attrs(buf, file, NULL, fname, 0);
+
+	save_preserve_xattrs = preserve_xattrs;
+	preserve_xattrs = 0;
+	set_file_attrs(buf, file, NULL, fname, ATTRS_ACCURATE_TIME);
+	preserve_xattrs = save_preserve_xattrs;
+
 	unmake_file(file);
+#ifdef SUPPORT_ACLS
+	uncache_tmp_acls();
+#endif
+#ifdef SUPPORT_XATTRS
+	uncache_tmp_xattrs();
+#endif
 
-	if (verbose > 1) {
-		rprintf(FINFO, "backed up %s to %s\n",
-			fname, buf);
-	}
-	return 1;
-}
-
-
-/* main backup switch routine */
-int make_backup(const char *fname)
-{
-	if (backup_dir)
-		return keep_backup(fname);
-	return make_simple_backup(fname);
+  success:
+	if (INFO_GTE(BACKUP, 1))
+		rprintf(FINFO, "backed up %s to %s\n", fname, buf);
+	return ret;
 }

batch.c

@@ -3,7 +3,7 @@
  *
  * Copyright (C) 1999 Weiss
  * Copyright (C) 2004 Chris Shoemaker
- * Copyright (C) 2004-2007 Wayne Davison
+ * Copyright (C) 2004-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,7 +20,7 @@
  */
 
 #include "rsync.h"
-#include "zlib/zlib.h"
+#include <zlib.h>
 #include <time.h>
 
 extern int eol_nulls;
@@ -31,15 +31,30 @@ extern int preserve_hard_links;
 extern int preserve_devices;
 extern int preserve_uid;
 extern int preserve_gid;
+extern int preserve_acls;
+extern int preserve_xattrs;
 extern int always_checksum;
 extern int do_compression;
-extern int def_compress_level;
+extern int inplace;
+extern int append_mode;
+extern int write_batch;
 extern int protocol_version;
+extern int raw_argc, cooked_argc;
+extern char **raw_argv, **cooked_argv;
 extern char *batch_name;
+#ifdef ICONV_OPTION
+extern char *iconv_opt;
+#endif
 
-extern struct filter_list_struct filter_list;
+extern filter_rule_list filter_list;
 
-static int tweaked_compress_level;
+int batch_fd = -1;
+int batch_sh_fd = -1;
+int batch_stream_flags;
+
+static int tweaked_append;
+static int tweaked_append_verify;
+static int tweaked_iconv;
 
 static int *flag_ptr[] = {
 	&recurse,		/* 0 */
@@ -50,11 +65,17 @@ static int *flag_ptr[] = {
 	&preserve_hard_links,	/* 5 */
 	&always_checksum,	/* 6 */
 	&xfer_dirs,		/* 7 (protocol 29) */
-	&tweaked_compress_level,/* 8 (protocol 29) */
+	&do_compression,	/* 8 (protocol 29) */
+	&tweaked_iconv,		/* 9  (protocol 30) */
+	&preserve_acls,		/* 10 (protocol 30) */
+	&preserve_xattrs,	/* 11 (protocol 30) */
+	&inplace,		/* 12 (protocol 30) */
+	&tweaked_append,	/* 13 (protocol 30) */
+	&tweaked_append_verify,	/* 14 (protocol 30) */
 	NULL
 };
 
-static char *flag_name[] = {
+static const char *const flag_name[] = {
 	"--recurse (-r)",
 	"--owner (-o)",
 	"--group (-g)",
@@ -64,6 +85,12 @@ static char *flag_name[] = {
 	"--checksum (-c)",
 	"--dirs (-d)",
 	"--compress (-z)",
+	"--iconv",
+	"--acls (-A)",
+	"--xattrs (-X)",
+	"--inplace",
+	"--append",
+	"--append-verify",
 	NULL
 };
 
@@ -71,16 +98,14 @@ void write_stream_flags(int fd)
 {
 	int i, flags;
 
-#if Z_DEFAULT_COMPRESSION == -1
-	tweaked_compress_level = do_compression ? def_compress_level + 2 : 0;
-#else
-#error internal logic error!  Fix def_compress_level logic above and below too!
+	tweaked_append = append_mode == 1;
+	tweaked_append_verify = append_mode == 2;
+#ifdef ICONV_OPTION
+	tweaked_iconv = iconv_opt != NULL;
 #endif
 
 	/* Start the batch file with a bitmap of data-stream-affecting
 	 * flags. */
-	if (protocol_version < 29)
-		flag_ptr[7] = NULL;
 	for (i = 0, flags = 0; flag_ptr[i]; i++) {
 		if (*flag_ptr[i])
 			flags |= 1 << i;
@@ -90,14 +115,32 @@ void write_stream_flags(int fd)
 
 void read_stream_flags(int fd)
 {
-	int i, flags;
+	batch_stream_flags = read_int(fd);
+}
+
+void check_batch_flags(void)
+{
+	int i;
 
 	if (protocol_version < 29)
 		flag_ptr[7] = NULL;
-	for (i = 0, flags = read_int(fd); flag_ptr[i]; i++) {
-		int set = flags & (1 << i) ? 1 : 0;
+	else if (protocol_version < 30)
+		flag_ptr[9] = NULL;
+	tweaked_append = append_mode == 1;
+	tweaked_append_verify = append_mode == 2;
+#ifdef ICONV_OPTION
+	tweaked_iconv = iconv_opt != NULL;
+#endif
+	for (i = 0; flag_ptr[i]; i++) {
+		int set = batch_stream_flags & (1 << i) ? 1 : 0;
 		if (*flag_ptr[i] != set) {
-			if (verbose) {
+			if (i == 9) {
+				rprintf(FERROR,
+					"%s specify the --iconv option to use this batch file.\n",
+					set ? "Please" : "Do not");
+				exit_cleanup(RERR_SYNTAX);
+			}
+			if (INFO_GTE(MISC, 1)) {
 				rprintf(FINFO,
 					"%sing the %s option to match the batchfile.\n",
 					set ? "Sett" : "Clear", flag_name[i]);
@@ -112,48 +155,64 @@ void read_stream_flags(int fd)
 			xfer_dirs = 0;
 	}
 
-	if (tweaked_compress_level == 0 || tweaked_compress_level == 2)
-		do_compression = 0;
-	else {
-		do_compression = 1;
-		def_compress_level = tweaked_compress_level - 2;
-	}
+	if (tweaked_append)
+		append_mode = 1;
+	else if (tweaked_append_verify)
+		append_mode = 2;
 }
 
-static void write_arg(int fd, char *arg)
+static int write_arg(const char *arg)
 {
-	char *x, *s;
+	const char *x, *s;
+	int len, err = 0;
 
 	if (*arg == '-' && (x = strchr(arg, '=')) != NULL) {
-		write(fd, arg, x - arg + 1);
+		err |= write(batch_sh_fd, arg, x - arg + 1) != x - arg + 1;
 		arg += x - arg + 1;
 	}
 
 	if (strpbrk(arg, " \"'&;|[]()$#!*?^\\") != NULL) {
-		write(fd, "'", 1);
+		err |= write(batch_sh_fd, "'", 1) != 1;
 		for (s = arg; (x = strchr(s, '\'')) != NULL; s = x + 1) {
-			write(fd, s, x - s + 1);
-			write(fd, "'", 1);
+			err |= write(batch_sh_fd, s, x - s + 1) != x - s + 1;
+			err |= write(batch_sh_fd, "'", 1) != 1;
 		}
-		write(fd, s, strlen(s));
-		write(fd, "'", 1);
-		return;
+		len = strlen(s);
+		err |= write(batch_sh_fd, s, len) != len;
+		err |= write(batch_sh_fd, "'", 1) != 1;
+		return err;
 	}
 
-	write(fd, arg, strlen(arg));
+	len = strlen(arg);
+	err |= write(batch_sh_fd, arg, len) != len;
+
+	return err;
+}
+
+/* Writes out a space and then an option (or other string) with an optional "=" + arg suffix. */
+static int write_opt(const char *opt, const char *arg)
+{
+	int len = strlen(opt);
+	int err = write(batch_sh_fd, " ", 1) != 1;
+	err = write(batch_sh_fd, opt, len) != len ? 1 : 0;
+	if (arg) {
+		err |= write(batch_sh_fd, "=", 1) != 1;
+		err |= write_arg(arg);
+	}
+	return err;
 }
 
 static void write_filter_rules(int fd)
 {
-	struct filter_struct *ent;
+	filter_rule *ent;
 
 	write_sbuf(fd, " <<'#E#'\n");
 	for (ent = filter_list.head; ent; ent = ent->next) {
 		unsigned int plen;
-		char *p = get_rule_prefix(ent->match_flags, "- ", 0, &plen);
+		char *p = get_rule_prefix(ent, "- ", 0, &plen);
 		write_buf(fd, p, plen);
 		write_sbuf(fd, ent->pattern);
-		if (ent->match_flags & MATCHFLG_DIRECTORY)
+		if (ent->rflags & FILTRULE_DIRECTORY)
 			write_byte(fd, '/');
 		write_byte(fd, eol_nulls ? 0 : '\n');
 	}
@@ -162,40 +221,66 @@ static void write_filter_rules(int fd)
 	write_sbuf(fd, "#E#");
 }
 
+/* This sets batch_fd and (for --write-batch) batch_sh_fd. */
+void open_batch_files(void)
+{
+	if (write_batch) {
+		char filename[MAXPATHLEN];
+
+		stringjoin(filename, sizeof filename, batch_name, ".sh", NULL);
+
+		batch_sh_fd = do_open(filename, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IXUSR);
+		if (batch_sh_fd < 0) {
+			rsyserr(FERROR, errno, "Batch file %s open error", full_fname(filename));
+			exit_cleanup(RERR_FILESELECT);
+		}
+
+		batch_fd = do_open(batch_name, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
+	} else if (strcmp(batch_name, "-") == 0)
+		batch_fd = STDIN_FILENO;
+	else
+		batch_fd = do_open(batch_name, O_RDONLY, S_IRUSR | S_IWUSR);
+
+	if (batch_fd < 0) {
+		rsyserr(FERROR, errno, "Batch file %s open error", full_fname(batch_name));
+		exit_cleanup(RERR_FILEIO);
+	}
+}
+
 /* This routine tries to write out an equivalent --read-batch command
  * given the user's --write-batch args.  However, it doesn't really
  * understand most of the options, so it uses some overly simple
  * heuristics to munge the command line into something that will
  * (hopefully) work. */
-void write_batch_shell_file(int argc, char *argv[], int file_arg_cnt)
+void write_batch_shell_file(void)
 {
-	int fd, i, len;
-	char *p, filename[MAXPATHLEN];
-
-	stringjoin(filename, sizeof filename,
-		   batch_name, ".sh", NULL);
-	fd = do_open(filename, O_WRONLY | O_CREAT | O_TRUNC,
-		     S_IRUSR | S_IWUSR | S_IEXEC);
-	if (fd < 0) {
-		rsyserr(FERROR, errno, "Batch file %s open error",
-			filename);
-		exit_cleanup(1);
-	}
+	int i, j, len, err = 0;
+	char *p, *p2;
 
 	/* Write argvs info to BATCH.sh file */
-	write_arg(fd, argv[0]);
+	err |= write_arg(raw_argv[0]);
 	if (filter_list.head) {
 		if (protocol_version >= 29)
-			write_sbuf(fd, " --filter=._-");
+			err |= write_opt("--filter", "._-");
 		else
-			write_sbuf(fd, " --exclude-from=-");
+			err |= write_opt("--exclude-from", "-");
 	}
-	for (i = 1; i < argc - file_arg_cnt; i++) {
-		p = argv[i];
+
+	/* Elide the filename args from the option list, but scan for them in reverse. */
+	for (i = raw_argc-1, j = cooked_argc-1; i > 0 && j >= 0; i--) {
+		if (strcmp(raw_argv[i], cooked_argv[j]) == 0) {
+			raw_argv[i] = NULL;
+			j--;
+		}
+	}
+
+	for (i = 1; i < raw_argc; i++) {
+		if (!(p = raw_argv[i]))
+			continue;
 		if (strncmp(p, "--files-from", 12) == 0
-		    || strncmp(p, "--filter", 8) == 0
-		    || strncmp(p, "--include", 9) == 0
-		    || strncmp(p, "--exclude", 9) == 0) {
+		 || strncmp(p, "--filter", 8) == 0
+		 || strncmp(p, "--include", 9) == 0
+		 || strncmp(p, "--exclude", 9) == 0) {
 			if (strchr(p, '=') == NULL)
 				i++;
 			continue;
@@ -204,27 +289,24 @@ void write_batch_shell_file(int argc, char *argv[], int file_arg_cnt)
 			i++;
 			continue;
 		}
-		write(fd, " ", 1);
 		if (strncmp(p, "--write-batch", len = 13) == 0
-		 || strncmp(p, "--only-write-batch", len = 18) == 0) {
-			write(fd, "--read-batch", 12);
-			if (p[len] == '=') {
-				write(fd, "=", 1);
-				write_arg(fd, p + len + 1);
-			}
-		} else
-			write_arg(fd, p);
+		 || strncmp(p, "--only-write-batch", len = 18) == 0)
+			err |= write_opt("--read-batch", p[len] == '=' ? p + len + 1 : NULL);
+		else {
+			err |= write(batch_sh_fd, " ", 1) != 1;
+			err |= write_arg(p);
+		}
 	}
-	if (!(p = check_for_hostspec(argv[argc - 1], &p, &i)))
-		p = argv[argc - 1];
-	write(fd, " ${1:-", 6);
-	write_arg(fd, p);
-	write_byte(fd, '}');
+	if (!(p = check_for_hostspec(cooked_argv[cooked_argc - 1], &p2, &i)))
+		p = cooked_argv[cooked_argc - 1];
+	err |= write_opt("${1:-", NULL);
+	err |= write_arg(p);
+	err |= write(batch_sh_fd, "}", 1) != 1;
 	if (filter_list.head)
-		write_filter_rules(fd);
-	if (write(fd, "\n", 1) != 1 || close(fd) < 0) {
-		rsyserr(FERROR, errno, "Batch file %s write error",
-			filename);
-		exit_cleanup(1);
+		write_filter_rules(batch_sh_fd);
+	if (write(batch_sh_fd, "\n", 1) != 1 || close(batch_sh_fd) < 0 || err) {
+		rsyserr(FERROR, errno, "Batch file %s.sh write error", batch_name);
+		exit_cleanup(RERR_FILEIO);
 	}
+	batch_sh_fd = -1;
 }

byteorder.h

@@ -2,7 +2,7 @@
  * Simple byteorder handling.
  *
  * Copyright (C) 1992-1995 Andrew Tridgell
- * Copyright (C) 2007 Wayne Davison
+ * Copyright (C) 2007-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -22,7 +22,7 @@
 
 /* We know that the x86 can handle misalignment and has the same
  * byte order (LSB-first) as the 32-bit numbers we transmit. */
-#ifdef __i386__
+#if defined __i386__ || defined __i486__ || defined __i586__ || defined __i686__ || __amd64
 #define CAREFUL_ALIGNMENT 0
 #endif
 
@@ -32,21 +32,100 @@
 
 #define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
 #define UVAL(buf,pos) ((uint32)CVAL(buf,pos))
-#define SCVAL(buf,pos,val) (CVAL(buf,pos) = (val))
 
 #if CAREFUL_ALIGNMENT
-#define PVAL(buf,pos) (UVAL(buf,pos)|UVAL(buf,(pos)+1)<<8)
-#define IVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+2)<<16)
-#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
-#define SIVALX(buf,pos,val) (SSVALX(buf,pos,val&0xFFFF),SSVALX(buf,pos+2,val>>16))
-#define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val)))
-#else
-/* this handles things for architectures like the 386 that can handle
-   alignment errors */
-/*
-   WARNING: This section is dependent on the length of int32
-   being correct. set CAREFUL_ALIGNMENT if it is not.
-*/
-#define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos)))
-#define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val))
-#endif
+
+static inline uint32
+IVALu(const uchar *buf, int pos)
+{
+	return UVAL(buf, pos)
+	     | UVAL(buf, pos + 1) << 8
+	     | UVAL(buf, pos + 2) << 16
+	     | UVAL(buf, pos + 3) << 24;
+}
+
+static inline void
+SIVALu(uchar *buf, int pos, uint32 val)
+{
+	CVAL(buf, pos)     = val;
+	CVAL(buf, pos + 1) = val >> 8;
+	CVAL(buf, pos + 2) = val >> 16;
+	CVAL(buf, pos + 3) = val >> 24;
+}
+
+static inline int64
+IVAL64(const char *buf, int pos)
+{
+	return IVALu((uchar*)buf, pos) | (int64)IVALu((uchar*)buf, pos + 4) << 32;
+}
+
+static inline void
+SIVAL64(char *buf, int pos, int64 val)
+{
+	SIVALu((uchar*)buf, pos, val);
+	SIVALu((uchar*)buf, pos + 4, val >> 32);
+}
+
+#else /* !CAREFUL_ALIGNMENT */
+
+/* This handles things for architectures like the 386 that can handle alignment errors.
+ * WARNING: This section is dependent on the length of an int32 (and thus a uint32)
+ * being correct (4 bytes)!  Set CAREFUL_ALIGNMENT if it is not. */
+
+static inline uint32
+IVALu(const uchar *buf, int pos)
+{
+	union {
+		const uchar *b;
+		const uint32 *num;
+	} u;
+	u.b = buf + pos;
+	return *u.num;
+}
+
+static inline void
+SIVALu(uchar *buf, int pos, uint32 val)
+{
+	union {
+		uchar *b;
+		uint32 *num;
+	} u;
+	u.b = buf + pos;
+	*u.num = val;
+}
+
+static inline int64
+IVAL64(const char *buf, int pos)
+{
+	union {
+		const char *b;
+		const int64 *num;
+	} u;
+	u.b = buf + pos;
+	return *u.num;
+}
+
+static inline void
+SIVAL64(char *buf, int pos, int64 val)
+{
+	union {
+		char *b;
+		int64 *num;
+	} u;
+	u.b = buf + pos;
+	*u.num = val;
+}
+
+#endif /* !CAREFUL_ALIGNMENT */
+
+static inline uint32
+IVAL(const char *buf, int pos)
+{
+	return IVALu((uchar*)buf, pos);
+}
+
+static inline void
+SIVAL(char *buf, int pos, uint32 val)
+{
+	SIVALu((uchar*)buf, pos, val);
+}

case_N.h

@@ -1,7 +1,7 @@
 /*
- * End-of-run cleanup helper code used by cleanup.c.
+ * Allow an arbitrary sequence of case labels.
  *
- * Copyright (C) 2006-2007 Wayne Davison
+ * Copyright (C) 2006-2020 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,63 +17,76 @@
  * with this program; if not, visit the http://fsf.org website.
  */
 
-/* This is included by cleanup.c multiple times, once for every segement in
- * the _exit_cleanup() code.  This produces the next "case N:" statement in
- * sequence and increments the cleanup_step variable by 1.  This ensures that
- * our case statements never get out of whack due to added/removed steps. */
+/* This is included multiple times, once for every segment in a switch statement.
+ * This produces the next "case N:" statement in sequence. */
 
-#if !defined EXIT_CLEANUP_CASE_0
-#define EXIT_CLEANUP_CASE_0
+#if !defined CASE_N_STATE_0
+#define CASE_N_STATE_0
 	case 0:
-#elif !defined EXIT_CLEANUP_CASE_1
-#define EXIT_CLEANUP_CASE_1
+#elif !defined CASE_N_STATE_1
+#define CASE_N_STATE_1
+	/* FALLTHROUGH */
 	case 1:
-#elif !defined EXIT_CLEANUP_CASE_2
-#define EXIT_CLEANUP_CASE_2
+#elif !defined CASE_N_STATE_2
+#define CASE_N_STATE_2
+	/* FALLTHROUGH */
 	case 2:
-#elif !defined EXIT_CLEANUP_CASE_3
-#define EXIT_CLEANUP_CASE_3
+#elif !defined CASE_N_STATE_3
+#define CASE_N_STATE_3
+	/* FALLTHROUGH */
 	case 3:
-#elif !defined EXIT_CLEANUP_CASE_4
-#define EXIT_CLEANUP_CASE_4
+#elif !defined CASE_N_STATE_4
+#define CASE_N_STATE_4
+	/* FALLTHROUGH */
 	case 4:
-#elif !defined EXIT_CLEANUP_CASE_5
-#define EXIT_CLEANUP_CASE_5
+#elif !defined CASE_N_STATE_5
+#define CASE_N_STATE_5
+	/* FALLTHROUGH */
 	case 5:
-#elif !defined EXIT_CLEANUP_CASE_6
-#define EXIT_CLEANUP_CASE_6
+#elif !defined CASE_N_STATE_6
+#define CASE_N_STATE_6
+	/* FALLTHROUGH */
 	case 6:
-#elif !defined EXIT_CLEANUP_CASE_7
-#define EXIT_CLEANUP_CASE_7
+#elif !defined CASE_N_STATE_7
+#define CASE_N_STATE_7
+	/* FALLTHROUGH */
 	case 7:
-#elif !defined EXIT_CLEANUP_CASE_8
-#define EXIT_CLEANUP_CASE_8
+#elif !defined CASE_N_STATE_8
+#define CASE_N_STATE_8
+	/* FALLTHROUGH */
 	case 8:
-#elif !defined EXIT_CLEANUP_CASE_9
-#define EXIT_CLEANUP_CASE_9
+#elif !defined CASE_N_STATE_9
+#define CASE_N_STATE_9
+	/* FALLTHROUGH */
 	case 9:
-#elif !defined EXIT_CLEANUP_CASE_10
-#define EXIT_CLEANUP_CASE_10
+#elif !defined CASE_N_STATE_10
+#define CASE_N_STATE_10
+	/* FALLTHROUGH */
 	case 10:
-#elif !defined EXIT_CLEANUP_CASE_11
-#define EXIT_CLEANUP_CASE_11
+#elif !defined CASE_N_STATE_11
+#define CASE_N_STATE_11
+	/* FALLTHROUGH */
 	case 11:
-#elif !defined EXIT_CLEANUP_CASE_12
-#define EXIT_CLEANUP_CASE_12
+#elif !defined CASE_N_STATE_12
+#define CASE_N_STATE_12
+	/* FALLTHROUGH */
 	case 12:
-#elif !defined EXIT_CLEANUP_CASE_13
-#define EXIT_CLEANUP_CASE_13
+#elif !defined CASE_N_STATE_13
+#define CASE_N_STATE_13
+	/* FALLTHROUGH */
 	case 13:
-#elif !defined EXIT_CLEANUP_CASE_14
-#define EXIT_CLEANUP_CASE_14
+#elif !defined CASE_N_STATE_14
+#define CASE_N_STATE_14
+	/* FALLTHROUGH */
 	case 14:
-#elif !defined EXIT_CLEANUP_CASE_15
-#define EXIT_CLEANUP_CASE_15
+#elif !defined CASE_N_STATE_15
+#define CASE_N_STATE_15
+	/* FALLTHROUGH */
 	case 15:
-#elif !defined EXIT_CLEANUP_CASE_16
-#define EXIT_CLEANUP_CASE_16
+#elif !defined CASE_N_STATE_16
+#define CASE_N_STATE_16
+	/* FALLTHROUGH */
 	case 16:
 #else
 #error Need to add more case statements!
 #endif
-		cleanup_step++;

checksum.c

@@ -3,13 +3,20 @@
  *
  * Copyright (C) 1996 Andrew Tridgell
  * Copyright (C) 1996 Paul Mackerras
- * Copyright (C) 2004-2007 Wayne Davison
+ * Copyright (C) 2004-2023 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 3 of the License, or
  * (at your option) any later version.
  *
+ * In addition, as a special exception, the copyright holders give
+ * permission to dynamically link rsync with the OpenSSL and xxhash
+ * libraries when those libraries are being distributed in compliance
+ * with their license terms, and to distribute a dynamically linked
+ * combination of rsync and these libraries.  This is also considered
+ * to be covered under the GPL's System Libraries exception.
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@@ -21,61 +28,348 @@
 
 #include "rsync.h"
 
+#ifdef SUPPORT_XXHASH
+#include <xxhash.h>
+# if XXH_VERSION_NUMBER >= 800
+#  define SUPPORT_XXH3 1
+# endif
+#endif
+
+extern int am_server;
+extern int whole_file;
 extern int checksum_seed;
 extern int protocol_version;
+extern int proper_seed_order;
+extern const char *checksum_choice;
 
-int csum_length = SHORT_SUM_LENGTH; /* initial value */
+#define NNI_BUILTIN (1<<0)
+#define NNI_EVP (1<<1)
+#define NNI_EVP_OK (1<<2)
 
+struct name_num_item valid_checksums_items[] = {
+#ifdef SUPPORT_XXH3
+	{ CSUM_XXH3_128, 0, "xxh128", NULL },
+	{ CSUM_XXH3_64, 0, "xxh3", NULL },
+#endif
+#ifdef SUPPORT_XXHASH
+	{ CSUM_XXH64, 0, "xxh64", NULL },
+	{ CSUM_XXH64, 0, "xxhash", NULL },
+#endif
+	{ CSUM_MD5, NNI_BUILTIN|NNI_EVP, "md5", NULL },
+	{ CSUM_MD4, NNI_BUILTIN|NNI_EVP, "md4", NULL },
+#ifdef SHA_DIGEST_LENGTH
+	{ CSUM_SHA1, NNI_EVP, "sha1", NULL },
+#endif
+	{ CSUM_NONE, 0, "none", NULL },
+	{ 0, 0, NULL, NULL }
+};
+
+struct name_num_obj valid_checksums = {
+	"checksum", NULL, 0, 0, valid_checksums_items
+};
+
+struct name_num_item valid_auth_checksums_items[] = {
+#ifdef SHA512_DIGEST_LENGTH
+	{ CSUM_SHA512, NNI_EVP, "sha512", NULL },
+#endif
+#ifdef SHA256_DIGEST_LENGTH
+	{ CSUM_SHA256, NNI_EVP, "sha256", NULL },
+#endif
+#ifdef SHA_DIGEST_LENGTH
+	{ CSUM_SHA1, NNI_EVP, "sha1", NULL },
+#endif
+	{ CSUM_MD5, NNI_BUILTIN|NNI_EVP, "md5", NULL },
+	{ CSUM_MD4, NNI_BUILTIN|NNI_EVP, "md4", NULL },
+	{ 0, 0, NULL, NULL }
+};
+
+struct name_num_obj valid_auth_checksums = {
+	"daemon auth checksum", NULL, 0, 0, valid_auth_checksums_items
+};
+
+/* These cannot make use of openssl, so they're marked just as built-in */
+struct name_num_item implied_checksum_md4 =
+    { CSUM_MD4, NNI_BUILTIN, "md4", NULL };
+struct name_num_item implied_checksum_md5 =
+    { CSUM_MD5, NNI_BUILTIN, "md5", NULL };
+
+struct name_num_item *xfer_sum_nni; /* used for the transfer checksum2 computations */
+int xfer_sum_len;
+struct name_num_item *file_sum_nni; /* used for the pre-transfer --checksum computations */
+int file_sum_len, file_sum_extra_cnt;
+
+#ifdef USE_OPENSSL
+const EVP_MD *xfer_sum_evp_md;
+const EVP_MD *file_sum_evp_md;
+EVP_MD_CTX *ctx_evp = NULL;
+#endif
+
+static int initialized_choices = 0;
+
+struct name_num_item *parse_csum_name(const char *name, int len)
+{
+	struct name_num_item *nni;
+
+	if (len < 0 && name)
+		len = strlen(name);
+
+	init_checksum_choices();
+
+	if (!name || (len == 4 && strncasecmp(name, "auto", 4) == 0)) {
+		if (protocol_version >= 30) {
+			if (!proper_seed_order)
+				return &implied_checksum_md5;
+			name = "md5";
+			len = 3;
+		} else {
+			if (protocol_version >= 27)
+				implied_checksum_md4.num = CSUM_MD4_OLD;
+			else if (protocol_version >= 21)
+				implied_checksum_md4.num = CSUM_MD4_BUSTED;
+			else
+				implied_checksum_md4.num = CSUM_MD4_ARCHAIC;
+			return &implied_checksum_md4;
+		}
+	}
+
+	nni = get_nni_by_name(&valid_checksums, name, len);
+
+	if (!nni) {
+		rprintf(FERROR, "unknown checksum name: %s\n", name);
+		exit_cleanup(RERR_UNSUPPORTED);
+	}
+
+	return nni;
+}
+
+#ifdef USE_OPENSSL
+static const EVP_MD *csum_evp_md(struct name_num_item *nni)
+{
+	const EVP_MD *emd;
+	if (!(nni->flags & NNI_EVP))
+		return NULL;
+
+#ifdef USE_MD5_ASM
+	if (nni->num == CSUM_MD5)
+		emd = NULL;
+	else
+#endif
+		emd = EVP_get_digestbyname(nni->name);
+	if (emd && !(nni->flags & NNI_EVP_OK)) { /* Make sure it works before we advertise it */
+		if (!ctx_evp && !(ctx_evp = EVP_MD_CTX_create()))
+			out_of_memory("csum_evp_md");
+		/* Some routines are marked as legacy and are not enabled in the openssl.cnf file.
+		 * If we can't init the emd, we'll fall back to our built-in code. */
+		if (EVP_DigestInit_ex(ctx_evp, emd, NULL) == 0)
+			emd = NULL;
+		else
+			nni->flags = (nni->flags & ~NNI_BUILTIN) | NNI_EVP_OK;
+	}
+	if (!emd)
+		nni->flags &= ~NNI_EVP;
+	return emd;
+}
+#endif
+
+void parse_checksum_choice(int final_call)
+{
+	if (valid_checksums.negotiated_nni)
+		xfer_sum_nni = file_sum_nni = valid_checksums.negotiated_nni;
+	else {
+		const char *cp = checksum_choice ? strchr(checksum_choice, ',') : NULL;
+		if (cp) {
+			xfer_sum_nni = parse_csum_name(checksum_choice, cp - checksum_choice);
+			file_sum_nni = parse_csum_name(cp+1, -1);
+		} else
+			xfer_sum_nni = file_sum_nni = parse_csum_name(checksum_choice, -1);
+		if (am_server && checksum_choice)
+			validate_choice_vs_env(NSTR_CHECKSUM, xfer_sum_nni->num, file_sum_nni->num);
+	}
+	xfer_sum_len = csum_len_for_type(xfer_sum_nni->num, 0);
+	file_sum_len = csum_len_for_type(file_sum_nni->num, 0);
+#ifdef USE_OPENSSL
+	xfer_sum_evp_md = csum_evp_md(xfer_sum_nni);
+	file_sum_evp_md = csum_evp_md(file_sum_nni);
+#endif
+
+	file_sum_extra_cnt = (file_sum_len + EXTRA_LEN - 1) / EXTRA_LEN;
+
+	if (xfer_sum_nni->num == CSUM_NONE)
+		whole_file = 1;
+
+	/* Snag the checksum name for both write_batch's option output & the following debug output. */
+	if (valid_checksums.negotiated_nni)
+		checksum_choice = valid_checksums.negotiated_nni->name;
+	else if (checksum_choice == NULL)
+		checksum_choice = xfer_sum_nni->name;
+
+	if (final_call && DEBUG_GTE(NSTR, am_server ? 3 : 1)) {
+		rprintf(FINFO, "%s%s checksum: %s\n",
+			am_server ? "Server" : "Client",
+			valid_checksums.negotiated_nni ? " negotiated" : "",
+			checksum_choice);
+	}
+}
+
+int csum_len_for_type(int cst, BOOL flist_csum)
+{
+	switch (cst) {
+	  case CSUM_NONE:
+		return 1;
+	  case CSUM_MD4_ARCHAIC:
+		/* The oldest checksum code is rather weird: the file-list code only sent
+		 * 2-byte checksums, but all other checksums were full MD4 length. */
+		return flist_csum ? 2 : MD4_DIGEST_LEN;
+	  case CSUM_MD4:
+	  case CSUM_MD4_OLD:
+	  case CSUM_MD4_BUSTED:
+		return MD4_DIGEST_LEN;
+	  case CSUM_MD5:
+		return MD5_DIGEST_LEN;
+#ifdef SHA_DIGEST_LENGTH
+	  case CSUM_SHA1:
+		return SHA_DIGEST_LENGTH;
+#endif
+#ifdef SHA256_DIGEST_LENGTH
+	  case CSUM_SHA256:
+		return SHA256_DIGEST_LENGTH;
+#endif
+#ifdef SHA512_DIGEST_LENGTH
+	  case CSUM_SHA512:
+		return SHA512_DIGEST_LENGTH;
+#endif
+	  case CSUM_XXH64:
+	  case CSUM_XXH3_64:
+		return 64/8;
+	  case CSUM_XXH3_128:
+		return 128/8;
+	  default: /* paranoia to prevent missing case values */
+		exit_cleanup(RERR_UNSUPPORTED);
+	}
+	return 0;
+}
+
+/* Returns 0 if the checksum is not canonical (i.e. it includes a seed value).
+ * Returns 1 if the public sum order matches our internal sum order.
+ * Returns -1 if the public sum order is the reverse of our internal sum order.
+ */
+int canonical_checksum(int csum_type)
+{
+	switch (csum_type) {
+	  case CSUM_NONE:
+	  case CSUM_MD4_ARCHAIC:
+	  case CSUM_MD4_OLD:
+	  case CSUM_MD4_BUSTED:
+		break;
+	  case CSUM_MD4:
+	  case CSUM_MD5:
+	  case CSUM_SHA1:
+	  case CSUM_SHA256:
+	  case CSUM_SHA512:
+		return -1;
+	  case CSUM_XXH64:
+	  case CSUM_XXH3_64:
+	  case CSUM_XXH3_128:
+		return 1;
+	  default: /* paranoia to prevent missing case values */
+		exit_cleanup(RERR_UNSUPPORTED);
+	}
+	return 0;
+}
+
+#ifndef USE_ROLL_SIMD /* See simd-checksum-*.cpp. */
 /*
-  a simple 32 bit checksum that can be upadted from either end
+  a simple 32 bit checksum that can be updated from either end
   (inspired by Mark Adler's Adler-32 checksum)
   */
 uint32 get_checksum1(char *buf1, int32 len)
 {
-    int32 i;
-    uint32 s1, s2;
-    schar *buf = (schar *)buf1;
+	int32 i;
+	uint32 s1, s2;
+	schar *buf = (schar *)buf1;
 
-    s1 = s2 = 0;
-    for (i = 0; i < (len-4); i+=4) {
-	s2 += 4*(s1 + buf[i]) + 3*buf[i+1] + 2*buf[i+2] + buf[i+3] +
-	  10*CHAR_OFFSET;
-	s1 += (buf[i+0] + buf[i+1] + buf[i+2] + buf[i+3] + 4*CHAR_OFFSET);
-    }
-    for (; i < len; i++) {
-	s1 += (buf[i]+CHAR_OFFSET); s2 += s1;
-    }
-    return (s1 & 0xffff) + (s2 << 16);
+	s1 = s2 = 0;
+	for (i = 0; i < (len-4); i+=4) {
+		s2 += 4*(s1 + buf[i]) + 3*buf[i+1] + 2*buf[i+2] + buf[i+3] + 10*CHAR_OFFSET;
+		s1 += (buf[i+0] + buf[i+1] + buf[i+2] + buf[i+3] + 4*CHAR_OFFSET);
+	}
+	for (; i < len; i++) {
+		s1 += (buf[i]+CHAR_OFFSET); s2 += s1;
+	}
+	return (s1 & 0xffff) + (s2 << 16);
 }
+#endif
 
-
+/* The "sum" buffer must be at least MAX_DIGEST_LEN bytes! */
 void get_checksum2(char *buf, int32 len, char *sum)
 {
-	md_context m;
-
-	if (protocol_version >= 30) {
+#ifdef USE_OPENSSL
+	if (xfer_sum_evp_md) {
+		static EVP_MD_CTX *evp = NULL;
 		uchar seedbuf[4];
-		md5_begin(&m);
-		md5_update(&m, (uchar *)buf, len);
+		if (!evp && !(evp = EVP_MD_CTX_create()))
+			out_of_memory("get_checksum2");
+		EVP_DigestInit_ex(evp, xfer_sum_evp_md, NULL);
 		if (checksum_seed) {
-			SIVAL(seedbuf, 0, checksum_seed);
-			md5_update(&m, seedbuf, 4);
+			SIVALu(seedbuf, 0, checksum_seed);
+			EVP_DigestUpdate(evp, seedbuf, 4);
 		}
-		md5_result(&m, (uchar *)sum);
-	} else {
+		EVP_DigestUpdate(evp, (uchar *)buf, len);
+		EVP_DigestFinal_ex(evp, (uchar *)sum, NULL);
+	} else
+#endif
+	switch (xfer_sum_nni->num) {
+#ifdef SUPPORT_XXHASH
+	  case CSUM_XXH64:
+		SIVAL64(sum, 0, XXH64(buf, len, checksum_seed));
+		break;
+#endif
+#ifdef SUPPORT_XXH3
+	  case CSUM_XXH3_64:
+		SIVAL64(sum, 0, XXH3_64bits_withSeed(buf, len, checksum_seed));
+		break;
+	  case CSUM_XXH3_128: {
+		XXH128_hash_t digest = XXH3_128bits_withSeed(buf, len, checksum_seed);
+		SIVAL64(sum, 0, digest.low64);
+		SIVAL64(sum, 8, digest.high64);
+		break;
+	  }
+#endif
+	  case CSUM_MD5: {
+		md_context m5;
+		uchar seedbuf[4];
+		md5_begin(&m5);
+		if (proper_seed_order) {
+			if (checksum_seed) {
+				SIVALu(seedbuf, 0, checksum_seed);
+				md5_update(&m5, seedbuf, 4);
+			}
+			md5_update(&m5, (uchar *)buf, len);
+		} else {
+			md5_update(&m5, (uchar *)buf, len);
+			if (checksum_seed) {
+				SIVALu(seedbuf, 0, checksum_seed);
+				md5_update(&m5, seedbuf, 4);
+			}
+		}
+		md5_result(&m5, (uchar *)sum);
+		break;
+	  }
+	  case CSUM_MD4:
+	  case CSUM_MD4_OLD:
+	  case CSUM_MD4_BUSTED:
+	  case CSUM_MD4_ARCHAIC: {
+		md_context m;
 		int32 i;
 		static char *buf1;
 		static int32 len1;
 
 		mdfour_begin(&m);
 
-		if (len > len1) {
-			if (buf1)
-				free(buf1);
+		if (len > len1 || !buf1) {
+			free(buf1);
 			buf1 = new_array(char, len+4);
 			len1 = len;
-			if (!buf1)
-				out_of_memory("get_checksum2");
 		}
 
 		memcpy(buf1, buf, len);
@@ -93,59 +387,150 @@ void get_checksum2(char *buf, int32 len, char *sum)
 		 * are multiples of 64.  This is fixed by calling mdfour_update()
 		 * even when there are no more bytes.
 		 */
-		if (len - i > 0 || protocol_version >= 27)
+		if (len - i > 0 || xfer_sum_nni->num > CSUM_MD4_BUSTED)
 			mdfour_update(&m, (uchar *)(buf1+i), len-i);
 
 		mdfour_result(&m, (uchar *)sum);
+		break;
+	  }
+	  default: /* paranoia to prevent missing case values */
+		exit_cleanup(RERR_UNSUPPORTED);
 	}
 }
 
-void file_checksum(char *fname, char *sum, OFF_T size)
+void file_checksum(const char *fname, const STRUCT_STAT *st_p, char *sum)
 {
 	struct map_struct *buf;
-	OFF_T i, len = size;
-	md_context m;
+	OFF_T i, len = st_p->st_size;
 	int32 remainder;
 	int fd;
 
-	memset(sum, 0, MAX_DIGEST_LEN);
-
-	fd = do_open(fname, O_RDONLY, 0);
-	if (fd == -1)
+	fd = do_open_checklinks(fname);
+	if (fd == -1) {
+		memset(sum, 0, file_sum_len);
 		return;
+	}
 
-	buf = map_file(fd, size, MAX_MAP_SIZE, CSUM_CHUNK);
+	buf = map_file(fd, len, MAX_MAP_SIZE, CHUNK_SIZE);
 
-	if (protocol_version >= 30) {
-		md5_begin(&m);
+#ifdef USE_OPENSSL
+	if (file_sum_evp_md) {
+		static EVP_MD_CTX *evp = NULL;
+		if (!evp && !(evp = EVP_MD_CTX_create()))
+			out_of_memory("file_checksum");
 
-		for (i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) {
-			md5_update(&m, (uchar *)map_ptr(buf, i, CSUM_CHUNK),
-				   CSUM_CHUNK);
-		}
+		EVP_DigestInit_ex(evp, file_sum_evp_md, NULL);
+
+		for (i = 0; i + CHUNK_SIZE <= len; i += CHUNK_SIZE)
+			EVP_DigestUpdate(evp, (uchar *)map_ptr(buf, i, CHUNK_SIZE), CHUNK_SIZE);
 
 		remainder = (int32)(len - i);
 		if (remainder > 0)
-			md5_update(&m, (uchar *)map_ptr(buf, i, remainder), remainder);
+			EVP_DigestUpdate(evp, (uchar *)map_ptr(buf, i, remainder), remainder);
+
+		EVP_DigestFinal_ex(evp, (uchar *)sum, NULL);
+	} else
+#endif
+	switch (file_sum_nni->num) {
+#ifdef SUPPORT_XXHASH
+	  case CSUM_XXH64: {
+		static XXH64_state_t* state = NULL;
+		if (!state && !(state = XXH64_createState()))
+			out_of_memory("file_checksum");
+
+		XXH64_reset(state, 0);
+
+		for (i = 0; i + CHUNK_SIZE <= len; i += CHUNK_SIZE)
+			XXH64_update(state, (uchar *)map_ptr(buf, i, CHUNK_SIZE), CHUNK_SIZE);
+
+		remainder = (int32)(len - i);
+		if (remainder > 0)
+			XXH64_update(state, (uchar *)map_ptr(buf, i, remainder), remainder);
+
+		SIVAL64(sum, 0, XXH64_digest(state));
+		break;
+	  }
+#endif
+#ifdef SUPPORT_XXH3
+	  case CSUM_XXH3_64: {
+		static XXH3_state_t* state = NULL;
+		if (!state && !(state = XXH3_createState()))
+			out_of_memory("file_checksum");
+
+		XXH3_64bits_reset(state);
+
+		for (i = 0; i + CHUNK_SIZE <= len; i += CHUNK_SIZE)
+			XXH3_64bits_update(state, (uchar *)map_ptr(buf, i, CHUNK_SIZE), CHUNK_SIZE);
+
+		remainder = (int32)(len - i);
+		if (remainder > 0)
+			XXH3_64bits_update(state, (uchar *)map_ptr(buf, i, remainder), remainder);
+
+		SIVAL64(sum, 0, XXH3_64bits_digest(state));
+		break;
+	  }
+	  case CSUM_XXH3_128: {
+		XXH128_hash_t digest;
+		static XXH3_state_t* state = NULL;
+		if (!state && !(state = XXH3_createState()))
+			out_of_memory("file_checksum");
+
+		XXH3_128bits_reset(state);
+
+		for (i = 0; i + CHUNK_SIZE <= len; i += CHUNK_SIZE)
+			XXH3_128bits_update(state, (uchar *)map_ptr(buf, i, CHUNK_SIZE), CHUNK_SIZE);
+
+		remainder = (int32)(len - i);
+		if (remainder > 0)
+			XXH3_128bits_update(state, (uchar *)map_ptr(buf, i, remainder), remainder);
+
+		digest = XXH3_128bits_digest(state);
+		SIVAL64(sum, 0, digest.low64);
+		SIVAL64(sum, 8, digest.high64);
+		break;
+	  }
+#endif
+	  case CSUM_MD5: {
+		md_context m5;
+
+		md5_begin(&m5);
+
+		for (i = 0; i + CHUNK_SIZE <= len; i += CHUNK_SIZE)
+			md5_update(&m5, (uchar *)map_ptr(buf, i, CHUNK_SIZE), CHUNK_SIZE);
+
+		remainder = (int32)(len - i);
+		if (remainder > 0)
+			md5_update(&m5, (uchar *)map_ptr(buf, i, remainder), remainder);
+
+		md5_result(&m5, (uchar *)sum);
+		break;
+	  }
+	  case CSUM_MD4:
+	  case CSUM_MD4_OLD:
+	  case CSUM_MD4_BUSTED:
+	  case CSUM_MD4_ARCHAIC: {
+		md_context m;
 
-		md5_result(&m, (uchar *)sum);
-	} else {
 		mdfour_begin(&m);
 
-		for (i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK) {
-			mdfour_update(&m, (uchar *)map_ptr(buf, i, CSUM_CHUNK),
-				      CSUM_CHUNK);
-		}
+		for (i = 0; i + CSUM_CHUNK <= len; i += CSUM_CHUNK)
+			mdfour_update(&m, (uchar *)map_ptr(buf, i, CSUM_CHUNK), CSUM_CHUNK);
 
 		/* Prior to version 27 an incorrect MD4 checksum was computed
 		 * by failing to call mdfour_tail() for block sizes that
 		 * are multiples of 64.  This is fixed by calling mdfour_update()
 		 * even when there are no more bytes. */
 		remainder = (int32)(len - i);
-		if (remainder > 0 || protocol_version >= 27)
+		if (remainder > 0 || file_sum_nni->num > CSUM_MD4_BUSTED)
 			mdfour_update(&m, (uchar *)map_ptr(buf, i, remainder), remainder);
 
 		mdfour_result(&m, (uchar *)sum);
+		break;
+	  }
+	  default:
+		rprintf(FERROR, "Invalid checksum-choice for --checksum: %s (%d)\n",
+			file_sum_nni->name, file_sum_nni->num);
+		exit_cleanup(RERR_UNSUPPORTED);
 	}
 
 	close(fd);
@@ -153,73 +538,266 @@ void file_checksum(char *fname, char *sum, OFF_T size)
 }
 
 static int32 sumresidue;
-static md_context md;
+static md_context ctx_md;
+#ifdef SUPPORT_XXHASH
+static XXH64_state_t* xxh64_state;
+#endif
+#ifdef SUPPORT_XXH3
+static XXH3_state_t* xxh3_state;
+#endif
+static struct name_num_item *cur_sum_nni;
+int cur_sum_len;
 
-void sum_init(int seed)
+#ifdef USE_OPENSSL
+static const EVP_MD *cur_sum_evp_md;
+#endif
+
+/* Initialize a hash digest accumulator.  Data is supplied via
+ * sum_update() and the resulting binary digest is retrieved via
+ * sum_end().  This only supports one active sum at a time. */
+int sum_init(struct name_num_item *nni, int seed)
 {
 	char s[4];
 
-	if (protocol_version >= 30)
-		md5_begin(&md);
-	else {
-		mdfour_begin(&md);
+	if (!nni)
+		nni = parse_csum_name(NULL, 0);
+	cur_sum_nni = nni;
+	cur_sum_len = csum_len_for_type(nni->num, 0);
+#ifdef USE_OPENSSL
+	cur_sum_evp_md = csum_evp_md(nni);
+#endif
+
+#ifdef USE_OPENSSL
+	if (cur_sum_evp_md) {
+		if (!ctx_evp && !(ctx_evp = EVP_MD_CTX_create()))
+			out_of_memory("file_checksum");
+		EVP_DigestInit_ex(ctx_evp, cur_sum_evp_md, NULL);
+	} else
+#endif
+	switch (cur_sum_nni->num) {
+#ifdef SUPPORT_XXHASH
+	  case CSUM_XXH64:
+		if (!xxh64_state && !(xxh64_state = XXH64_createState()))
+			out_of_memory("sum_init");
+		XXH64_reset(xxh64_state, 0);
+		break;
+#endif
+#ifdef SUPPORT_XXH3
+	  case CSUM_XXH3_64:
+		if (!xxh3_state && !(xxh3_state = XXH3_createState()))
+			out_of_memory("sum_init");
+		XXH3_64bits_reset(xxh3_state);
+		break;
+	  case CSUM_XXH3_128:
+		if (!xxh3_state && !(xxh3_state = XXH3_createState()))
+			out_of_memory("sum_init");
+		XXH3_128bits_reset(xxh3_state);
+		break;
+#endif
+	  case CSUM_MD5:
+		md5_begin(&ctx_md);
+		break;
+	  case CSUM_MD4:
+		mdfour_begin(&ctx_md);
+		sumresidue = 0;
+		break;
+	  case CSUM_MD4_OLD:
+	  case CSUM_MD4_BUSTED:
+	  case CSUM_MD4_ARCHAIC:
+		mdfour_begin(&ctx_md);
 		sumresidue = 0;
 		SIVAL(s, 0, seed);
 		sum_update(s, 4);
+		break;
+	  case CSUM_NONE:
+		break;
+	  default: /* paranoia to prevent missing case values */
+		exit_cleanup(RERR_UNSUPPORTED);
 	}
+
+	return cur_sum_len;
 }
 
-/**
- * Feed data into an MD4 accumulator, md.  The results may be
- * retrieved using sum_end().  md is used for different purposes at
- * different points during execution.
- *
- * @todo Perhaps get rid of md and just pass in the address each time.
- * Very slightly clearer and slower.
- **/
+/* Feed data into a hash digest accumulator. */
 void sum_update(const char *p, int32 len)
 {
-	if (protocol_version >= 30) {
-		md5_update(&md, (uchar *)p, len);
-		return;
-	}
+#ifdef USE_OPENSSL
+	if (cur_sum_evp_md) {
+		EVP_DigestUpdate(ctx_evp, (uchar *)p, len);
+	} else
+#endif
+	switch (cur_sum_nni->num) {
+#ifdef SUPPORT_XXHASH
+	  case CSUM_XXH64:
+		XXH64_update(xxh64_state, p, len);
+		break;
+#endif
+#ifdef SUPPORT_XXH3
+	  case CSUM_XXH3_64:
+		XXH3_64bits_update(xxh3_state, p, len);
+		break;
+	  case CSUM_XXH3_128:
+		XXH3_128bits_update(xxh3_state, p, len);
+		break;
+#endif
+	  case CSUM_MD5:
+		md5_update(&ctx_md, (uchar *)p, len);
+		break;
+	  case CSUM_MD4:
+	  case CSUM_MD4_OLD:
+	  case CSUM_MD4_BUSTED:
+	  case CSUM_MD4_ARCHAIC:
+		if (len + sumresidue < CSUM_CHUNK) {
+			memcpy(ctx_md.buffer + sumresidue, p, len);
+			sumresidue += len;
+			break;
+		}
 
-	if (len + sumresidue < CSUM_CHUNK) {
-		memcpy(md.buffer + sumresidue, p, len);
-		sumresidue += len;
-		return;
-	}
+		if (sumresidue) {
+			int32 i = CSUM_CHUNK - sumresidue;
+			memcpy(ctx_md.buffer + sumresidue, p, i);
+			mdfour_update(&ctx_md, (uchar *)ctx_md.buffer, CSUM_CHUNK);
+			len -= i;
+			p += i;
+		}
 
-	if (sumresidue) {
-		int32 i = CSUM_CHUNK - sumresidue;
-		memcpy(md.buffer + sumresidue, p, i);
-		mdfour_update(&md, (uchar *)md.buffer, CSUM_CHUNK);
-		len -= i;
-		p += i;
-	}
+		while (len >= CSUM_CHUNK) {
+			mdfour_update(&ctx_md, (uchar *)p, CSUM_CHUNK);
+			len -= CSUM_CHUNK;
+			p += CSUM_CHUNK;
+		}
 
-	while (len >= CSUM_CHUNK) {
-		mdfour_update(&md, (uchar *)p, CSUM_CHUNK);
-		len -= CSUM_CHUNK;
-		p += CSUM_CHUNK;
+		sumresidue = len;
+		if (sumresidue)
+			memcpy(ctx_md.buffer, p, sumresidue);
+		break;
+	  case CSUM_NONE:
+		break;
+	  default: /* paranoia to prevent missing case values */
+		exit_cleanup(RERR_UNSUPPORTED);
 	}
-
-	sumresidue = len;
-	if (sumresidue)
-		memcpy(md.buffer, p, sumresidue);
 }
 
-int sum_end(char *sum)
+/* The sum buffer only needs to be as long as the current checksum's digest
+ * len, not MAX_DIGEST_LEN. Note that for CSUM_MD4_ARCHAIC that is the full
+ * MD4_DIGEST_LEN even if the file-list code is going to ignore all but the
+ * first 2 bytes of it. */
+void sum_end(char *sum)
 {
-	if (protocol_version >= 30) {
-		md5_result(&md, (uchar *)sum);
-		return MD5_DIGEST_LEN;
+#ifdef USE_OPENSSL
+	if (cur_sum_evp_md) {
+		EVP_DigestFinal_ex(ctx_evp, (uchar *)sum, NULL);
+	} else
+#endif
+	switch (cur_sum_nni->num) {
+#ifdef SUPPORT_XXHASH
+	  case CSUM_XXH64:
+		SIVAL64(sum, 0, XXH64_digest(xxh64_state));
+		break;
+#endif
+#ifdef SUPPORT_XXH3
+	  case CSUM_XXH3_64:
+		SIVAL64(sum, 0, XXH3_64bits_digest(xxh3_state));
+		break;
+	  case CSUM_XXH3_128: {
+		XXH128_hash_t digest = XXH3_128bits_digest(xxh3_state);
+		SIVAL64(sum, 0, digest.low64);
+		SIVAL64(sum, 8, digest.high64);
+		break;
+	  }
+#endif
+	  case CSUM_MD5:
+		md5_result(&ctx_md, (uchar *)sum);
+		break;
+	  case CSUM_MD4:
+	  case CSUM_MD4_OLD:
+		mdfour_update(&ctx_md, (uchar *)ctx_md.buffer, sumresidue);
+		mdfour_result(&ctx_md, (uchar *)sum);
+		break;
+	  case CSUM_MD4_BUSTED:
+	  case CSUM_MD4_ARCHAIC:
+		if (sumresidue)
+			mdfour_update(&ctx_md, (uchar *)ctx_md.buffer, sumresidue);
+		mdfour_result(&ctx_md, (uchar *)sum);
+		break;
+	  case CSUM_NONE:
+		*sum = '\0';
+		break;
+	  default: /* paranoia to prevent missing case values */
+		exit_cleanup(RERR_UNSUPPORTED);
 	}
-
-	if (sumresidue || protocol_version >= 27)
-		mdfour_update(&md, (uchar *)md.buffer, sumresidue);
-
-	mdfour_result(&md, (uchar *)sum);
-
-	return MD4_DIGEST_LEN;
+}
+
+#if defined SUPPORT_XXH3 || defined USE_OPENSSL
+static void verify_digest(struct name_num_item *nni, BOOL check_auth_list)
+{
+#ifdef SUPPORT_XXH3
+	static int xxh3_result = 0;
+#endif
+#ifdef USE_OPENSSL
+	static int prior_num = 0, prior_flags = 0, prior_result = 0;
+#endif
+
+#ifdef SUPPORT_XXH3
+	if (nni->num == CSUM_XXH3_64 || nni->num == CSUM_XXH3_128) {
+		if (!xxh3_result) {
+			char buf[32816];
+			int j;
+			for (j = 0; j < (int)sizeof buf; j++)
+				buf[j] = ' ' + (j % 96);
+			sum_init(nni, 0);
+			sum_update(buf, 32816);
+			sum_update(buf, 31152);
+			sum_update(buf, 32474);
+			sum_update(buf, 9322);
+			xxh3_result = XXH3_64bits_digest(xxh3_state) != 0xadbcf16d4678d1de ? -1 : 1;
+		}
+		if (xxh3_result < 0)
+			nni->num = CSUM_gone;
+		return;
+	}
+#endif
+
+#ifdef USE_OPENSSL
+	if (BITS_SETnUNSET(nni->flags, NNI_EVP, NNI_BUILTIN|NNI_EVP_OK)) {
+		if (nni->num == prior_num && nni->flags == prior_flags) {
+			nni->flags = prior_result;
+			if (!(nni->flags & NNI_EVP))
+				nni->num = CSUM_gone;
+		} else {
+			prior_num = nni->num;
+			prior_flags = nni->flags;
+			if (!csum_evp_md(nni))
+				nni->num = CSUM_gone;
+			prior_result = nni->flags;
+			if (check_auth_list && (nni = get_nni_by_num(&valid_auth_checksums, prior_num)) != NULL)
+				verify_digest(nni, False);
+		}
+	}
+#endif
+}
+#endif
+
+void init_checksum_choices()
+{
+#if defined SUPPORT_XXH3 || defined USE_OPENSSL
+	struct name_num_item *nni;
+#endif
+
+	if (initialized_choices)
+		return;
+
+#if defined USE_OPENSSL && OPENSSL_VERSION_NUMBER < 0x10100000L
+	OpenSSL_add_all_algorithms();
+#endif
+
+#if defined SUPPORT_XXH3 || defined USE_OPENSSL
+	for (nni = valid_checksums.list; nni->name; nni++)
+		verify_digest(nni, True);
+
+	for (nni = valid_auth_checksums.list; nni->name; nni++)
+		verify_digest(nni, False);
+#endif
+
+	initialized_choices = 1;
 }

chmod.c

@@ -2,7 +2,7 @@
  * Implement the core of the --chmod option.
  *
  * Copyright (C) 2002 Scott Howard
- * Copyright (C) 2005-2007 Wayne Davison
+ * Copyright (C) 2005-2020 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +19,7 @@
  */
 
 #include "rsync.h"
+#include "itypes.h"
 
 extern mode_t orig_umask;
 
@@ -35,13 +36,15 @@ struct chmod_mode_struct {
 #define CHMOD_ADD 1
 #define CHMOD_SUB 2
 #define CHMOD_EQ  3
+#define CHMOD_SET 4
 
 #define STATE_ERROR 0
 #define STATE_1ST_HALF 1
 #define STATE_2ND_HALF 2
+#define STATE_OCTAL_NUM 3
 
 /* Parse a chmod-style argument, and break it down into one or more AND/OR
- * pairs in a linked list.  We return a pointer to new items on succcess
+ * pairs in a linked list.  We return a pointer to new items on success
  * (appending the items to the specified list), or NULL on error. */
 struct chmod_mode_struct *parse_chmod(const char *modestr,
 				      struct chmod_mode_struct **root_mode_ptr)
@@ -87,6 +90,10 @@ struct chmod_mode_struct *parse_chmod(const char *modestr,
 				curr_mode->ModeAND = CHMOD_BITS - (where * 7) - (topoct ? topbits : 0);
 				curr_mode->ModeOR  = bits + topoct;
 				break;
+			case CHMOD_SET:
+				curr_mode->ModeAND = 0;
+				curr_mode->ModeOR  = bits;
+				break;
 			}
 
 			curr_mode->flags = flags;
@@ -99,7 +106,8 @@ struct chmod_mode_struct *parse_chmod(const char *modestr,
 			where = what = op = topoct = topbits = flags = 0;
 		}
 
-		if (state != STATE_2ND_HALF) {
+		switch (state) {
+		case STATE_1ST_HALF:
 			switch (*modestr) {
 			case 'D':
 				if (flags & FLAG_FILES_ONLY)
@@ -138,10 +146,17 @@ struct chmod_mode_struct *parse_chmod(const char *modestr,
 				state = STATE_2ND_HALF;
 				break;
 			default:
-				state = STATE_ERROR;
+				if (isDigit(modestr) && *modestr < '8' && !where) {
+					op = CHMOD_SET;
+					state =  STATE_OCTAL_NUM;
+					where = 1;
+					what = *modestr - '0';
+				} else
+					state = STATE_ERROR;
 				break;
 			}
-		} else {
+			break;
+		case STATE_2ND_HALF:
 			switch (*modestr) {
 			case 'r':
 				what |= 4;
@@ -168,6 +183,15 @@ struct chmod_mode_struct *parse_chmod(const char *modestr,
 				state = STATE_ERROR;
 				break;
 			}
+			break;
+		case STATE_OCTAL_NUM:
+			if (isDigit(modestr) && *modestr < '8') {
+				what = what*8 + *modestr - '0';
+				if (what > CHMOD_BITS)
+					state = STATE_ERROR;
+			} else
+				state = STATE_ERROR;
+			break;
 		}
 		modestr++;
 	}

cleanup.c

@@ -4,7 +4,7 @@
  * Copyright (C) 1996-2000 Andrew Tridgell
  * Copyright (C) 1996 Paul Mackerras
  * Copyright (C) 2002 Martin Pool
- * Copyright (C) 2003-2007 Wayne Davison
+ * Copyright (C) 2003-2020 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -22,14 +22,23 @@
 
 #include "rsync.h"
 
+extern int dry_run;
 extern int am_server;
 extern int am_daemon;
+extern int am_receiver;
+extern int am_sender;
 extern int io_error;
 extern int keep_partial;
-extern int log_got_error;
+extern int got_xfer_error;
+extern int protocol_version;
+extern int output_needs_newline;
 extern char *partial_dir;
 extern char *logfile_name;
 
+int called_from_signal_handler = 0;
+BOOL shutting_down = False;
+BOOL flush_ok_after_signal = False;
+
 #ifdef HAVE_SIGACTION
 static struct sigaction sigact;
 #endif
@@ -78,10 +87,10 @@ void close_all(void)
  **/
 int cleanup_got_literal = 0;
 
-static char *cleanup_fname;
-static char *cleanup_new_fname;
+static const char *cleanup_fname;
+static const char *cleanup_new_fname;
 static struct file_struct *cleanup_file;
-static int cleanup_fd_r, cleanup_fd_w;
+static int cleanup_fd_r = -1, cleanup_fd_w = -1;
 static pid_t cleanup_pid = 0;
 
 pid_t cleanup_child_pid = -1;
@@ -93,75 +102,104 @@ pid_t cleanup_child_pid = -1;
  **/
 NORETURN void _exit_cleanup(int code, const char *file, int line)
 {
-	static int cleanup_step = 0;
-	static int exit_code = 0;
-	static int unmodified_code = 0;
+	static int switch_step = 0;
+	static int exit_code = 0, exit_line = 0;
+	static const char *exit_file = NULL;
+	static int first_code = 0;
 
 	SIGACTION(SIGUSR1, SIG_IGN);
 	SIGACTION(SIGUSR2, SIG_IGN);
 
-	if (exit_code) /* Preserve first error code when recursing. */
-		code = exit_code;
+	if (!exit_code) { /* Preserve first error exit info when recursing. */
+		exit_code = code;
+		exit_file = file;
+		exit_line = line < 0 ? -line : line;
+	}
 
 	/* If this is the exit at the end of the run, the server side
-	 * should not attempt to output a message (see log.c). */
+	 * should not attempt to output a message (see log_exit()). */
 	if (am_server && code == 0)
 		am_server = 2;
 
 	/* Some of our actions might cause a recursive call back here, so we
 	 * keep track of where we are in the cleanup and never repeat a step. */
-	switch (cleanup_step) {
-#include "case_N.h" /* case 0: cleanup_step++; */
+	switch (switch_step) {
+#include "case_N.h" /* case 0: */
+		switch_step++;
 
-		exit_code = unmodified_code = code;
+		first_code = code;
 
-		if (verbose > 3) {
-			rprintf(FINFO,
-				"_exit_cleanup(code=%d, file=%s, line=%d): entered\n",
-				code, file, line);
+		if (output_needs_newline) {
+			fputc('\n', stdout);
+			output_needs_newline = 0;
+		}
+
+		if (DEBUG_GTE(EXIT, 2)) {
+			rprintf(FINFO,
+				"[%s] _exit_cleanup(code=%d, file=%s, line=%d): entered\n",
+				who_am_i(), code, src_file(file), line);
 		}
 
-		/* FALLTHROUGH */
 #include "case_N.h"
+		switch_step++;
 
 		if (cleanup_child_pid != -1) {
 			int status;
 			int pid = wait_process(cleanup_child_pid, &status, WNOHANG);
 			if (pid == cleanup_child_pid) {
 				status = WEXITSTATUS(status);
-				if (status > code)
-					code = exit_code = status;
+				if (status > exit_code)
+					exit_code = status;
 			}
 		}
 
-		/* FALLTHROUGH */
 #include "case_N.h"
+		switch_step++;
 
-		if (cleanup_got_literal && cleanup_fname && cleanup_new_fname
-		 && keep_partial && handle_partial_dir(cleanup_new_fname, PDIR_CREATE)) {
-			char *fname = cleanup_fname;
-			cleanup_fname = NULL;
-			if (cleanup_fd_r != -1)
+		if (cleanup_got_literal && (cleanup_fname || cleanup_fd_w != -1)) {
+			if (cleanup_fd_r != -1) {
 				close(cleanup_fd_r);
+				cleanup_fd_r = -1;
+			}
 			if (cleanup_fd_w != -1) {
 				flush_write_file(cleanup_fd_w);
 				close(cleanup_fd_w);
+				cleanup_fd_w = -1;
+			}
+			if (cleanup_fname && cleanup_new_fname && keep_partial
+			 && handle_partial_dir(cleanup_new_fname, PDIR_CREATE)) {
+				int tweak_modtime = 0;
+				const char *fname = cleanup_fname;
+				cleanup_fname = NULL;
+				if (!partial_dir) {
+					/* We don't want to leave a partial file with a modern time or it
+					 * could be skipped via --update.  Setting the time to something
+					 * really old also helps it to stand out as unfinished in an ls. */
+					tweak_modtime = 1;
+					cleanup_file->modtime = 0;
+				}
+				finish_transfer(cleanup_new_fname, fname, NULL, NULL,
+						cleanup_file, tweak_modtime, !partial_dir);
 			}
-			finish_transfer(cleanup_new_fname, fname, NULL, NULL,
-					cleanup_file, 0, !partial_dir);
 		}
 
-		/* FALLTHROUGH */
 #include "case_N.h"
+		switch_step++;
 
-		io_flush(FULL_FLUSH);
+		if (flush_ok_after_signal) {
+			flush_ok_after_signal = False;
+			if (code == RERR_SIGNAL)
+				io_flush(FULL_FLUSH);
+		}
+		if (!exit_code && !code)
+			io_flush(FULL_FLUSH);
 
-		/* FALLTHROUGH */
 #include "case_N.h"
+		switch_step++;
 
 		if (cleanup_fname)
-			do_unlink(cleanup_fname);
-		if (code)
+			do_unlink_at(cleanup_fname);
+		if (exit_code)
 			kill_all(SIGUSR1);
 		if (cleanup_pid && cleanup_pid == getpid()) {
 			char *pidf = lp_pid_file();
@@ -169,32 +207,60 @@ NORETURN void _exit_cleanup(int code, const char *file, int line)
 				unlink(lp_pid_file());
 		}
 
-		if (code == 0) {
+		if (exit_code == 0) {
+			if (code)
+				exit_code = code;
 			if (io_error & IOERR_DEL_LIMIT)
-				code = exit_code = RERR_DEL_LIMIT;
+				exit_code = RERR_DEL_LIMIT;
 			if (io_error & IOERR_VANISHED)
-				code = exit_code = RERR_VANISHED;
-			if (io_error & IOERR_GENERAL || log_got_error)
-				code = exit_code = RERR_PARTIAL;
+				exit_code = RERR_VANISHED;
+			if (io_error & IOERR_GENERAL || got_xfer_error)
+				exit_code = RERR_PARTIAL;
 		}
 
-		if (code || am_daemon || (logfile_name && (am_server || !verbose)))
-			log_exit(code, file, line);
+		/* If line < 0, this exit is after a MSG_ERROR_EXIT event, so
+		 * we don't want to output a duplicate error. */
+		if ((exit_code && line > 0)
+		 || am_daemon || (logfile_name && (am_server || !INFO_GTE(STATS, 1)))) {
+			log_exit(exit_code, exit_file, exit_line);
+		}
 
-		/* FALLTHROUGH */
 #include "case_N.h"
+		switch_step++;
 
-		if (verbose > 2) {
+		if (DEBUG_GTE(EXIT, 1)) {
 			rprintf(FINFO,
-				"_exit_cleanup(code=%d, file=%s, line=%d): "
-				"about to call exit(%d)\n",
-				unmodified_code, file, line, code);
+				"[%s] _exit_cleanup(code=%d, file=%s, line=%d): "
+				"about to call exit(%d)%s\n",
+				who_am_i(), first_code, exit_file, exit_line, exit_code,
+				dry_run ? " (DRY RUN)" : "");
 		}
 
-		/* FALLTHROUGH */
 #include "case_N.h"
+		switch_step++;
 
-		if (am_server && code)
+		if (exit_code && exit_code != RERR_SOCKETIO && exit_code != RERR_STREAMIO && exit_code != RERR_SIGNAL1
+		 && exit_code != RERR_TIMEOUT && !shutting_down) {
+			if (protocol_version >= 31 || am_receiver) {
+				if (line > 0) {
+					if (DEBUG_GTE(EXIT, 3)) {
+						rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT with exit_code %d\n",
+							who_am_i(), exit_code);
+					}
+					send_msg_int(MSG_ERROR_EXIT, exit_code);
+				}
+				if (!am_sender)
+					io_flush(MSG_FLUSH); /* Be sure to send all messages */
+				noop_io_until_death();
+			}
+			else if (!am_sender)
+				io_flush(MSG_FLUSH); /* Be sure to send all messages */
+		}
+
+#include "case_N.h"
+		switch_step++;
+
+		if (am_server && exit_code)
 			msleep(100);
 		close_all();
 
@@ -203,17 +269,28 @@ NORETURN void _exit_cleanup(int code, const char *file, int line)
 		break;
 	}
 
-	exit(code);
+	if (called_from_signal_handler) {
+#ifdef GCOV_COVERAGE
+		/* _exit() bypasses the gcov atexit flush; rsync's generator (and
+		 * other processes) normally finish via the signal handler, so
+		 * without this they would write no .gcda. Harmless otherwise. */
+		extern void __gcov_dump(void);
+		__gcov_dump();
+#endif
+		_exit(exit_code);
+	}
+	exit(exit_code);
 }
 
 void cleanup_disable(void)
 {
 	cleanup_fname = cleanup_new_fname = NULL;
+	cleanup_fd_r = cleanup_fd_w = -1;
 	cleanup_got_literal = 0;
 }
 
 
-void cleanup_set(char *fnametmp, char *fname, struct file_struct *file,
+void cleanup_set(const char *fnametmp, const char *fname, struct file_struct *file,
 		 int fd_r, int fd_w)
 {
 	cleanup_fname = fnametmp;

clientname.c

@@ -3,7 +3,7 @@
  *
  * Copyright (C) 1992-2001 Andrew Tridgell <tridge@samba.org>
  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
- * Copyright (C) 2002-2007 Wayne Davison
+ * Copyright (C) 2002-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,50 +27,60 @@
  */
 
 #include "rsync.h"
+#include "itypes.h"
+
+extern int am_daemon;
 
 static const char default_name[] = "UNKNOWN";
-extern int am_server;
+static const char proxyv2sig[] = "\r\n\r\n\0\r\nQUIT\n";
 
+static char ipaddr_buf[100];
 
-/**
- * Return the IP addr of the client as a string
- **/
+#define PROXY_V2_SIG_SIZE ((int)sizeof proxyv2sig - 1)
+#define PROXY_V2_HEADER_SIZE (PROXY_V2_SIG_SIZE + 1 + 1 + 2)
+
+#define CMD_LOCAL 0
+#define CMD_PROXY 1
+
+#define PROXY_FAM_TCPv4 0x11
+#define PROXY_FAM_TCPv6 0x21
+
+#define GET_SOCKADDR_FAMILY(ss) ((struct sockaddr*)ss)->sa_family
+
+static void client_sockaddr(int fd, struct sockaddr_storage *ss, socklen_t *ss_len);
+static int check_name(const char *ipaddr, const struct sockaddr_storage *ss, char *name_buf, size_t name_buf_size);
+static int valid_ipaddr(const char *s, int allow_scope);
+
+/* Return the IP addr of the client as a string. */
 char *client_addr(int fd)
 {
-	static char addr_buf[100];
-	static int initialised;
 	struct sockaddr_storage ss;
 	socklen_t length = sizeof ss;
-	char *ssh_info, *p;
 
-	if (initialised)
-		return addr_buf;
+	if (*ipaddr_buf)
+		return ipaddr_buf;
 
-	initialised = 1;
-
-	if (am_server) {	/* daemon over --rsh mode */
-		strlcpy(addr_buf, "0.0.0.0", sizeof addr_buf);
-		if ((ssh_info = getenv("SSH_CONNECTION")) != NULL
-		    || (ssh_info = getenv("SSH_CLIENT")) != NULL
-		    || (ssh_info = getenv("SSH2_CLIENT")) != NULL) {
-			strlcpy(addr_buf, ssh_info, sizeof addr_buf);
+	if (am_daemon < 0) {	/* daemon over --rsh mode */
+		char *env_str;
+		strlcpy(ipaddr_buf, "0.0.0.0", sizeof ipaddr_buf);
+		if ((env_str = getenv("REMOTE_HOST")) != NULL
+		 || (env_str = getenv("SSH_CONNECTION")) != NULL
+		 || (env_str = getenv("SSH_CLIENT")) != NULL
+		 || (env_str = getenv("SSH2_CLIENT")) != NULL) {
+			char *p;
+			strlcpy(ipaddr_buf, env_str, sizeof ipaddr_buf);
 			/* Truncate the value to just the IP address. */
-			if ((p = strchr(addr_buf, ' ')) != NULL)
+			if ((p = strchr(ipaddr_buf, ' ')) != NULL)
 				*p = '\0';
 		}
-	} else {
-		client_sockaddr(fd, &ss, &length);
-		getnameinfo((struct sockaddr *)&ss, length,
-			    addr_buf, sizeof addr_buf, NULL, 0, NI_NUMERICHOST);
+		if (valid_ipaddr(ipaddr_buf, True))
+			return ipaddr_buf;
 	}
 
-	return addr_buf;
-}
+	client_sockaddr(fd, &ss, &length);
+	getnameinfo((struct sockaddr *)&ss, length, ipaddr_buf, sizeof ipaddr_buf, NULL, 0, NI_NUMERICHOST);
 
-
-static int get_sockaddr_family(const struct sockaddr_storage *ss)
-{
-	return ((struct sockaddr *) ss)->sa_family;
+	return ipaddr_buf;
 }
 
 
@@ -87,68 +97,218 @@ static int get_sockaddr_family(const struct sockaddr_storage *ss)
  * After translation from sockaddr to name we do a forward lookup to
  * make sure nobody is spoofing PTR records.
  **/
-char *client_name(int fd)
+char *client_name(const char *ipaddr)
 {
 	static char name_buf[100];
-	static char port_buf[100];
-	static int initialised;
+	char port_buf[100];
 	struct sockaddr_storage ss;
 	socklen_t ss_len;
+	struct addrinfo hint, *answer;
+	int err;
 
-	if (initialised)
+	if (*name_buf)
 		return name_buf;
 
 	strlcpy(name_buf, default_name, sizeof name_buf);
-	initialised = 1;
+
+	if (strcmp(ipaddr, "0.0.0.0") == 0)
+		return name_buf;
 
 	memset(&ss, 0, sizeof ss);
-
-	if (am_server) {	/* daemon over --rsh mode */
-		char *addr = client_addr(fd);
-		struct addrinfo hint, *answer;
-		int err;
-
-		memset(&hint, 0, sizeof hint);
+	memset(&hint, 0, sizeof hint);
 
 #ifdef AI_NUMERICHOST
-		hint.ai_flags = AI_NUMERICHOST;
+	hint.ai_flags = AI_NUMERICHOST;
 #endif
-		hint.ai_socktype = SOCK_STREAM;
+	hint.ai_socktype = SOCK_STREAM;
 
-		if ((err = getaddrinfo(addr, NULL, &hint, &answer)) != 0) {
-			rprintf(FLOG, "malformed address %s: %s\n",
-			        addr, gai_strerror(err));
-			return name_buf;
-		}
-
-		switch (answer->ai_family) {
-		case AF_INET:
-			ss_len = sizeof (struct sockaddr_in);
-			memcpy(&ss, answer->ai_addr, ss_len);
-			break;
-#ifdef INET6
-		case AF_INET6:
-			ss_len = sizeof (struct sockaddr_in6);
-			memcpy(&ss, answer->ai_addr, ss_len);
-			break;
-#endif
-		default:
-			exit_cleanup(RERR_SOCKETIO);
-		}
-		freeaddrinfo(answer);
-	} else {
-		ss_len = sizeof ss;
-		client_sockaddr(fd, &ss, &ss_len);
+	if ((err = getaddrinfo(ipaddr, NULL, &hint, &answer)) != 0) {
+		rprintf(FLOG, "malformed address %s: %s\n", ipaddr, gai_strerror(err));
+		return name_buf;
 	}
 
-	if (lookup_name(fd, &ss, ss_len, name_buf, sizeof name_buf,
-			port_buf, sizeof port_buf) == 0)
-		check_name(fd, &ss, name_buf, sizeof name_buf);
+	switch (answer->ai_family) {
+	case AF_INET:
+		ss_len = sizeof (struct sockaddr_in);
+		memcpy(&ss, answer->ai_addr, ss_len);
+		break;
+#ifdef INET6
+	case AF_INET6:
+		ss_len = sizeof (struct sockaddr_in6);
+		memcpy(&ss, answer->ai_addr, ss_len);
+		break;
+#endif
+	default:
+		NOISY_DEATH("Unknown ai_family value");
+	}
+	freeaddrinfo(answer);
+
+	/* reverse lookup */
+	err = getnameinfo((struct sockaddr*)&ss, ss_len, name_buf, sizeof name_buf,
+			  port_buf, sizeof port_buf, NI_NAMEREQD | NI_NUMERICSERV);
+	if (err) {
+		strlcpy(name_buf, default_name, sizeof name_buf);
+		rprintf(FLOG, "name lookup failed for %s: %s\n", ipaddr, gai_strerror(err));
+	} else
+		check_name(ipaddr, &ss, name_buf, sizeof name_buf);
 
 	return name_buf;
 }
 
 
+/* Try to read a proxy protocol header (V1 or V2). Returns 1 on success or 0 on failure. */
+int read_proxy_protocol_header(int fd)
+{
+	union {
+		struct {
+			char line[108];
+		} v1;
+		struct {
+			char sig[PROXY_V2_SIG_SIZE];
+			char ver_cmd;
+			char fam;
+			unsigned char len[2];
+			union {
+				struct {
+					char src_addr[4];
+					char dst_addr[4];
+					char src_port[2];
+					char dst_port[2];
+				} ip4;
+				struct {
+					char src_addr[16];
+					char dst_addr[16];
+					char src_port[2];
+					char dst_port[2];
+				} ip6;
+				struct {
+					char src_addr[108];
+					char dst_addr[108];
+				} unx;
+			} addr;
+		} v2;
+	} hdr;
+
+	read_buf(fd, (char*)&hdr, PROXY_V2_SIG_SIZE);
+
+	if (memcmp(hdr.v2.sig, proxyv2sig, PROXY_V2_SIG_SIZE) == 0) { /* Proxy V2 */
+		int ver, cmd, size;
+
+		read_buf(fd, (char*)&hdr + PROXY_V2_SIG_SIZE, PROXY_V2_HEADER_SIZE - PROXY_V2_SIG_SIZE);
+
+		ver = (hdr.v2.ver_cmd & 0xf0) >> 4;
+		cmd = (hdr.v2.ver_cmd & 0x0f);
+		size = (hdr.v2.len[0] << 8) + hdr.v2.len[1];
+
+		if (ver != 2 || size + PROXY_V2_HEADER_SIZE > (int)sizeof hdr)
+			return 0;
+
+		/* Grab all the remaining data in the binary request. */
+		read_buf(fd, (char*)&hdr + PROXY_V2_HEADER_SIZE, size);
+
+		switch (cmd) {
+		case CMD_PROXY:
+			switch (hdr.v2.fam) {
+			case PROXY_FAM_TCPv4:
+				if (size != sizeof hdr.v2.addr.ip4)
+					return 0;
+				inet_ntop(AF_INET, hdr.v2.addr.ip4.src_addr, ipaddr_buf, sizeof ipaddr_buf);
+				return valid_ipaddr(ipaddr_buf, False);
+#ifdef INET6
+			case PROXY_FAM_TCPv6:
+				if (size != sizeof hdr.v2.addr.ip6)
+					return 0;
+				inet_ntop(AF_INET6, hdr.v2.addr.ip6.src_addr, ipaddr_buf, sizeof ipaddr_buf);
+				return valid_ipaddr(ipaddr_buf, False);
+#endif
+			default:
+				break;
+			}
+			/* For an unsupported protocol we'll ignore the proxy data (leaving ipaddr_buf unset)
+			 * and accept the connection, which will get handled as a normal socket addr. */
+			return 1;
+		case CMD_LOCAL:
+			return 1;
+		default:
+			break;
+		}
+
+		return 0;
+	}
+
+	if (memcmp(hdr.v1.line, "PROXY", 5) == 0) { /* Proxy V1 */
+		char *endc, *sp, *p = hdr.v1.line + PROXY_V2_SIG_SIZE;
+		int port_chk;
+
+		*p = '\0';
+		if (!strchr(hdr.v1.line, '\n')) {
+			while (1) {
+				read_buf(fd, p, 1);
+				if (*p++ == '\n')
+					break;
+				if (p - hdr.v1.line >= (int)sizeof hdr.v1.line - 1)
+					return 0;
+			}
+			*p = '\0';
+		}
+
+		endc = strchr(hdr.v1.line, '\r');
+		if (!endc || endc[1] != '\n' || endc[2])
+			return 0;
+		*endc = '\0';
+
+		p = hdr.v1.line + 5;
+
+		if (!isSpace(p++))
+			return 0;
+		if (strncmp(p, "TCP4", 4) == 0)
+			p += 4;
+		else if (strncmp(p, "TCP6", 4) == 0)
+			p += 4;
+		else if (strncmp(p, "UNKNOWN", 7) == 0)
+			return 1;
+		else
+			return 0;
+
+		if (!isSpace(p++))
+			return 0;
+
+		if ((sp = strchr(p, ' ')) == NULL)
+			return 0;
+		*sp = '\0';
+		if (!valid_ipaddr(p, False))
+			return 0;
+		strlcpy(ipaddr_buf, p, sizeof ipaddr_buf); /* It will always fit when valid. */
+
+		p = sp + 1;
+		if ((sp = strchr(p, ' ')) == NULL)
+			return 0;
+		*sp = '\0';
+		if (!valid_ipaddr(p, False))
+			return 0;
+		/* Ignore destination address. */
+
+		p = sp + 1;
+		if ((sp = strchr(p, ' ')) == NULL)
+			return 0;
+		*sp = '\0';
+		port_chk = strtol(p, &endc, 10);
+		if (*endc || port_chk == 0)
+			return 0;
+		/* Ignore source port. */
+
+		p = sp + 1;
+		port_chk = strtol(p, &endc, 10);
+		if (*endc || port_chk == 0)
+			return 0;
+		/* Ignore destination port. */
+
+		return 1;
+	}
+
+	return 0;
+}
+
 
 /**
  * Get the sockaddr for the client.
@@ -156,9 +316,7 @@ char *client_name(int fd)
  * If it comes in as an ipv4 address mapped into IPv6 format then we
  * convert it back to a regular IPv4.
  **/
-void client_sockaddr(int fd,
-		     struct sockaddr_storage *ss,
-		     socklen_t *ss_len)
+static void client_sockaddr(int fd, struct sockaddr_storage *ss, socklen_t *ss_len)
 {
 	memset(ss, 0, sizeof *ss);
 
@@ -169,8 +327,8 @@ void client_sockaddr(int fd,
 	}
 
 #ifdef INET6
-	if (get_sockaddr_family(ss) == AF_INET6 &&
-	    IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)ss)->sin6_addr)) {
+	if (GET_SOCKADDR_FAMILY(ss) == AF_INET6
+	 && IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)ss)->sin6_addr)) {
 		/* OK, so ss is in the IPv6 family, but it is really
 		 * an IPv4 address: something like
 		 * "::ffff:10.130.1.2".  If we use it as-is, then the
@@ -193,51 +351,20 @@ void client_sockaddr(int fd,
 		/* There is a macro to extract the mapped part
 		 * (IN6_V4MAPPED_TO_SINADDR ?), but it does not seem
 		 * to be present in the Linux headers. */
-		memcpy(&sin->sin_addr, &sin6.sin6_addr.s6_addr[12],
-		    sizeof sin->sin_addr);
+		memcpy(&sin->sin_addr, &sin6.sin6_addr.s6_addr[12], sizeof sin->sin_addr);
 	}
 #endif
 }
 
 
-/**
- * Look up a name from @p ss into @p name_buf.
- *
- * @param fd file descriptor for client socket.
- **/
-int lookup_name(int fd, const struct sockaddr_storage *ss,
-		socklen_t ss_len,
-		char *name_buf, size_t name_buf_size,
-		char *port_buf, size_t port_buf_size)
-{
-	int name_err;
-
-	/* reverse lookup */
-	name_err = getnameinfo((struct sockaddr *) ss, ss_len,
-			       name_buf, name_buf_size,
-			       port_buf, port_buf_size,
-			       NI_NAMEREQD | NI_NUMERICSERV);
-	if (name_err != 0) {
-		strlcpy(name_buf, default_name, name_buf_size);
-		rprintf(FLOG, "name lookup failed for %s: %s\n",
-			client_addr(fd), gai_strerror(name_err));
-		return name_err;
-	}
-
-	return 0;
-}
-
-
-
 /**
  * Compare an addrinfo from the resolver to a sockinfo.
  *
  * Like strcmp, returns 0 for identical.
  **/
-int compare_addrinfo_sockaddr(const struct addrinfo *ai,
-			      const struct sockaddr_storage *ss)
+static int compare_addrinfo_sockaddr(const struct addrinfo *ai, const struct sockaddr_storage *ss)
 {
-	int ss_family = get_sockaddr_family(ss);
+	int ss_family = GET_SOCKADDR_FAMILY(ss);
 	const char fn[] = "compare_addrinfo_sockaddr";
 
 	if (ai->ai_family != ss_family) {
@@ -253,8 +380,7 @@ int compare_addrinfo_sockaddr(const struct addrinfo *ai,
 		sin1 = (const struct sockaddr_in *) ss;
 		sin2 = (const struct sockaddr_in *) ai->ai_addr;
 
-		return memcmp(&sin1->sin_addr, &sin2->sin_addr,
-			      sizeof sin1->sin_addr);
+		return memcmp(&sin1->sin_addr, &sin2->sin_addr, sizeof sin1->sin_addr);
 	}
 
 #ifdef INET6
@@ -264,14 +390,13 @@ int compare_addrinfo_sockaddr(const struct addrinfo *ai,
 		sin1 = (const struct sockaddr_in6 *) ss;
 		sin2 = (const struct sockaddr_in6 *) ai->ai_addr;
 
-		if (ai->ai_addrlen < sizeof (struct sockaddr_in6)) {
+		if (ai->ai_addrlen < (int)sizeof (struct sockaddr_in6)) {
 			rprintf(FLOG, "%s: too short sockaddr_in6; length=%d\n",
-				fn, ai->ai_addrlen);
+				fn, (int)ai->ai_addrlen);
 			return 1;
 		}
 
-		if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr,
-			   sizeof sin1->sin6_addr))
+		if (memcmp(&sin1->sin6_addr, &sin2->sin6_addr, sizeof sin1->sin6_addr))
 			return 1;
 
 #ifdef HAVE_SOCKADDR_IN6_SCOPE_ID
@@ -297,13 +422,11 @@ int compare_addrinfo_sockaddr(const struct addrinfo *ai,
  * because it doesn't seem that it could be spoofed in any way, and
  * getaddrinfo on random service names seems to cause problems on AIX.
  **/
-int check_name(int fd,
-	       const struct sockaddr_storage *ss,
-	       char *name_buf, size_t name_buf_size)
+static int check_name(const char *ipaddr, const struct sockaddr_storage *ss, char *name_buf, size_t name_buf_size)
 {
 	struct addrinfo hints, *res, *res0;
 	int error;
-	int ss_family = get_sockaddr_family(ss);
+	int ss_family = GET_SOCKADDR_FAMILY(ss);
 
 	memset(&hints, 0, sizeof hints);
 	hints.ai_family = ss_family;
@@ -334,10 +457,82 @@ int check_name(int fd,
 		/* We hit the end of the list without finding an
 		 * address that was the same as ss. */
 		rprintf(FLOG, "%s is not a known address for \"%s\": "
-			"spoofed address?\n", client_addr(fd), name_buf);
+			"spoofed address?\n", ipaddr, name_buf);
 		strlcpy(name_buf, default_name, name_buf_size);
 	}
 
 	freeaddrinfo(res0);
 	return 0;
 }
+
+/* Returns 1 for a valid IPv4 or IPv6 addr, or 0 for a bad one. */
+static int valid_ipaddr(const char *s, int allow_scope)
+{
+	int i;
+
+	if (strchr(s, ':') != NULL) { /* Only IPv6 has a colon. */
+		int count, saw_double_colon = 0;
+		int ipv4_at_end = 0;
+
+		if (*s == ':') { /* A colon at the start must be a :: */
+			if (*++s != ':')
+				return 0;
+			saw_double_colon = 1;
+			s++;
+		}
+
+		for (count = 0; count < 8; count++) {
+			if (!*s)
+				return saw_double_colon;
+			if (allow_scope && *s == '%') {
+				if (saw_double_colon)
+					break;
+				return 0;
+			}
+
+			if (strchr(s, ':') == NULL && strchr(s, '.') != NULL) {
+				if ((!saw_double_colon && count != 6) || (saw_double_colon && count > 6))
+					return 0;
+				ipv4_at_end = 1;
+				break;
+			}
+
+			if (!isHexDigit(s++)) /* Need 1-4 hex digits */
+				return 0;
+			if (isHexDigit(s) && isHexDigit(++s) && isHexDigit(++s) && isHexDigit(++s))
+				return 0;
+
+			if (*s == ':') {
+				if (!*++s)
+					return 0;
+				if (*s == ':') {
+					if (saw_double_colon)
+						return 0;
+					saw_double_colon = 1;
+					s++;
+				}
+			}
+		}
+
+		if (!ipv4_at_end) {
+			if (allow_scope && *s == '%')
+				for (s++; isAlNum(s); s++) { }
+			return !*s && s[-1] != '%';
+		}
+	}
+
+	/* IPv4 */
+	for (i = 0; i < 4; i++) {
+		long n;
+		char *end;
+
+		if (i && *s++ != '.')
+			return 0;
+		n = strtol(s, &end, 10);
+		if (n > 255 || n < 0 || end <= s || end > s+3)
+			return 0;
+		s = end;
+	}
+
+	return !*s;
+}

cmd-or-msg

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+srcdir=`dirname $0`
+opt="$1"
+shift
+
+echo "$*"
+if ! "${@}"; then
+    echo "If you can't fix the issue, re-run $srcdir/configure with --$opt."
+    exit 1
+fi

compat.c

@@ -3,7 +3,7 @@
  *
  * Copyright (C) Andrew Tridgell 1996
  * Copyright (C) Paul Mackerras 1996
- * Copyright (C) 2004-2007 Wayne Davison
+ * Copyright (C) 2004-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,12 +20,9 @@
  */
 
 #include "rsync.h"
+#include "itypes.h"
+#include "ifuncs.h"
 
-int remote_protocol = 0;
-int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
-int inc_recurse = 0;
-
-extern int verbose;
 extern int am_server;
 extern int am_sender;
 extern int local_server;
@@ -33,9 +30,11 @@ extern int inplace;
 extern int recurse;
 extern int use_qsort;
 extern int allow_inc_recurse;
+extern int preallocate_files;
 extern int append_mode;
 extern int fuzzy_basis;
 extern int read_batch;
+extern int write_batch;
 extern int delay_updates;
 extern int checksum_seed;
 extern int basis_dir_cnt;
@@ -44,44 +43,102 @@ extern int protocol_version;
 extern int protect_args;
 extern int preserve_uid;
 extern int preserve_gid;
+extern int preserve_atimes;
+extern int preserve_crtimes;
 extern int preserve_acls;
 extern int preserve_xattrs;
+extern int xfer_flags_as_varint;
 extern int need_messages_from_generator;
 extern int delete_mode, delete_before, delete_during, delete_after;
-extern char *shell_cmd; /* contains VER.SUB string if client is a pre-release */
+extern int do_compression;
+extern int do_compression_level;
+extern int do_compression_threads;
+extern int saw_stderr_opt;
+extern int msgs2stderr;
+extern char *shell_cmd;
 extern char *partial_dir;
-extern char *dest_option;
 extern char *files_from;
 extern char *filesfrom_host;
-extern struct filter_list_struct filter_list;
+extern const char *checksum_choice;
+extern const char *compress_choice;
+extern char *daemon_auth_choices;
+extern filter_rule_list filter_list;
+extern int need_unsorted_flist;
 #ifdef ICONV_OPTION
-extern char *iconv_opt;
 extern iconv_t ic_send, ic_recv;
+extern char *iconv_opt;
 #endif
+extern struct name_num_obj valid_checksums, valid_auth_checksums;
+
+extern struct name_num_item *xfer_sum_nni;
+
+int remote_protocol = 0;
+int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
+int inc_recurse = 0;
+int compat_flags = 0;
+int use_safe_inc_flist = 0;
+int want_xattr_optim = 0;
+int proper_seed_order = 0;
+int inplace_partial = 0;
+int do_negotiated_strings = 0;
+int xmit_id0_names = 0;
+
+struct name_num_item *xattr_sum_nni;
+int xattr_sum_len = 0;
 
 /* These index values are for the file-list's extra-attribute array. */
-int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx;
-#ifdef ICONV_OPTION
-int ic_ndx;
+int pathname_ndx, depth_ndx, atimes_ndx, crtimes_ndx, uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx;
 
+int receiver_symlink_times = 0; /* receiver can set the time on a symlink */
+int sender_symlink_iconv = 0;	/* sender should convert symlink content */
+
+#ifdef ICONV_OPTION
 int filesfrom_convert = 0;
 #endif
 
+#define MAX_NSTR_STRLEN 256
+
+struct name_num_item valid_compressions_items[] = {
+#ifdef SUPPORT_ZSTD
+	{ CPRES_ZSTD, 0, "zstd", NULL },
+#endif
+#ifdef SUPPORT_LZ4
+	{ CPRES_LZ4, 0, "lz4", NULL },
+#endif
+	{ CPRES_ZLIBX, 0, "zlibx", NULL },
+	{ CPRES_ZLIB, 0, "zlib", NULL },
+	{ CPRES_NONE, 0, "none", NULL },
+	{ 0, 0, NULL, NULL }
+};
+
+struct name_num_obj valid_compressions = {
+	"compress", NULL, 0, 0, valid_compressions_items
+};
+
+#define CF_INC_RECURSE	 (1<<0)
+#define CF_SYMLINK_TIMES (1<<1)
+#define CF_SYMLINK_ICONV (1<<2)
+#define CF_SAFE_FLIST	 (1<<3)
+#define CF_AVOID_XATTR_OPTIM (1<<4)
+#define CF_CHKSUM_SEED_FIX (1<<5)
+#define CF_INPLACE_PARTIAL_DIR (1<<6)
+#define CF_VARINT_FLIST_FLAGS (1<<7)
+#define CF_ID0_NAMES (1<<8)
+
+static const char *client_info;
+
 /* The server makes sure that if either side only supports a pre-release
  * version of a protocol, that both sides must speak a compatible version
  * of that protocol for it to be advertised as available. */
 static void check_sub_protocol(void)
 {
-	char *dot;
+	const char *dot;
 	int their_protocol, their_sub;
-#if SUBPROTOCOL_VERSION != 0
-	int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
-#else
-	int our_sub = 0;
-#endif
+	int our_sub = get_subprotocol_version();
 
-	if (!shell_cmd || !(dot = strchr(shell_cmd, '.'))
-	 || !(their_protocol = atoi(shell_cmd))
+	/* client_info starts with VER.SUB string if client is a pre-release. */
+	if (!(their_protocol = atoi(client_info))
+	 || !(dot = strchr(client_info, '.'))
 	 || !(their_sub = atoi(dot+1))) {
 #if SUBPROTOCOL_VERSION != 0
 		if (our_sub)
@@ -102,12 +159,432 @@ static void check_sub_protocol(void)
 		protocol_version--;
 }
 
+void set_allow_inc_recurse(void)
+{
+	if (!local_server)
+		client_info = shell_cmd ? shell_cmd : "";
+	else if (am_server) {
+		char buf[64];
+		maybe_add_e_option(buf, sizeof buf);
+		client_info = *buf ? strdup(buf+1) : ""; /* The +1 skips the leading "e". */
+	}
+
+	if (!recurse || use_qsort)
+		allow_inc_recurse = 0;
+	else if (!am_sender
+	 && (delete_before || delete_after
+	  || delay_updates || prune_empty_dirs))
+		allow_inc_recurse = 0;
+	else if (am_server && strchr(client_info, 'i') == NULL)
+		allow_inc_recurse = 0;
+}
+
+void parse_compress_choice(int final_call)
+{
+	if (valid_compressions.negotiated_nni)
+		do_compression = valid_compressions.negotiated_nni->num;
+	else if (compress_choice) {
+		struct name_num_item *nni = get_nni_by_name(&valid_compressions, compress_choice, -1);
+		if (!nni) {
+			rprintf(FERROR, "unknown compress name: %s\n", compress_choice);
+			exit_cleanup(RERR_UNSUPPORTED);
+		}
+		do_compression = nni->num;
+		if (am_server)
+			validate_choice_vs_env(NSTR_COMPRESS, do_compression, -1);
+	} else if (do_compression)
+		do_compression = CPRES_ZLIB;
+	else
+		do_compression = CPRES_NONE;
+
+	if (do_compression != CPRES_NONE && final_call)
+		init_compression_level(); /* There's a chance this might turn compression off! */
+
+	if (do_compression == CPRES_NONE)
+		compress_choice = NULL;
+
+	/* Snag the compression name for both write_batch's option output & the following debug output. */
+	if (valid_compressions.negotiated_nni)
+		compress_choice = valid_compressions.negotiated_nni->name;
+	else if (compress_choice == NULL) {
+		struct name_num_item *nni = get_nni_by_num(&valid_compressions, do_compression);
+		compress_choice = nni ? nni->name : "UNKNOWN";
+	}
+
+	if (final_call && DEBUG_GTE(NSTR, am_server ? 3 : 1)
+	 && (do_compression != CPRES_NONE || do_compression_level != CLVL_NOT_SPECIFIED)) {
+		rprintf(FINFO, "%s%s compress: %s (level %d)\n",
+			am_server ? "Server" : "Client",
+			valid_compressions.negotiated_nni ? " negotiated" : "",
+			compress_choice, do_compression_level);
+	}
+}
+
+struct name_num_item *get_nni_by_name(struct name_num_obj *nno, const char *name, int len)
+{
+	struct name_num_item *nni;
+
+	if (len < 0)
+		len = strlen(name);
+
+	for (nni = nno->list; nni->name; nni++) {
+		if (nni->num == CSUM_gone)
+			continue;
+		if (strncasecmp(name, nni->name, len) == 0 && nni->name[len] == '\0')
+			return nni;
+	}
+
+	return NULL;
+}
+
+struct name_num_item *get_nni_by_num(struct name_num_obj *nno, int num)
+{
+	struct name_num_item *nni;
+
+	for (nni = nno->list; nni->name; nni++) {
+		if (num == nni->num)
+			return nni;
+	}
+
+	return NULL;
+}
+
+static void init_nno_saw(struct name_num_obj *nno, int val)
+{
+	struct name_num_item *nni;
+	int cnt;
+
+	if (!nno->saw_len) {
+		for (nni = nno->list; nni->name; nni++) {
+			if (nni->num >= nno->saw_len)
+				nno->saw_len = nni->num + 1;
+		}
+	}
+
+	if (!nno->saw) {
+		nno->saw = new_array0(uchar, nno->saw_len);
+
+		/* We'll take this opportunity to set the main_nni values for duplicates. */
+		for (cnt = 1, nni = nno->list; nni->name; nni++, cnt++) {
+			if (nni->num == CSUM_gone)
+				continue;
+			if (nno->saw[nni->num])
+				nni->main_nni = &nno->list[nno->saw[nni->num]-1];
+			else
+				nno->saw[nni->num] = cnt;
+		}
+	}
+
+	memset(nno->saw, val, nno->saw_len);
+}
+
+/* Simplify the user-provided string so that it contains valid names without any duplicates.
+ * It also sets the "saw" flags to a 1-relative count of which name was seen first. */
+static int parse_nni_str(struct name_num_obj *nno, const char *from, char *tobuf, int tobuf_len)
+{
+	char *to = tobuf, *tok = NULL;
+	int saw_tok = 0, cnt = 0;
+
+	while (1) {
+		int at_space = isSpace(from);
+		char ch = *from++;
+		if (ch == '&')
+			ch = '\0';
+		if (!ch || at_space) {
+			if (tok) {
+				struct name_num_item *nni = get_nni_by_name(nno, tok, to - tok);
+				if (nni && !nno->saw[nni->num]) {
+					nno->saw[nni->num] = ++cnt;
+					if (nni->main_nni) {
+						to = tok + strlcpy(tok, nni->main_nni->name, tobuf_len - (tok - tobuf));
+						if (to - tobuf >= tobuf_len) {
+							to = tok - 1;
+							break;
+						}
+					}
+				} else
+					to = tok - (tok != tobuf);
+				saw_tok = 1;
+				tok = NULL;
+			}
+			if (!ch)
+				break;
+			continue;
+		}
+		if (!tok) {
+			if (to != tobuf)
+				*to++ = ' ';
+			tok = to;
+		}
+		if (to - tobuf >= tobuf_len - 1) {
+			to = tok - (tok != tobuf);
+			break;
+		}
+		*to++ = ch;
+	}
+	*to = '\0';
+
+	if (saw_tok && to == tobuf)
+		return strlcpy(tobuf, "INVALID", MAX_NSTR_STRLEN);
+
+	return to - tobuf;
+}
+
+static int parse_negotiate_str(struct name_num_obj *nno, char *tmpbuf)
+{
+	struct name_num_item *nni, *ret = NULL;
+	int best = nno->saw_len; /* We want best == 1 from the client list, so start with a big number. */
+	char *space, *tok = tmpbuf;
+	while (tok) {
+		while (*tok == ' ') tok++; /* Should be unneeded... */
+		if (!*tok)
+			break;
+		if ((space = strchr(tok, ' ')) != NULL)
+			*space = '\0';
+		nni = get_nni_by_name(nno, tok, -1);
+		if (space) {
+			*space = ' ';
+			tok = space + 1;
+		} else
+			tok = NULL;
+		if (!nni || !nno->saw[nni->num] || best <= nno->saw[nni->num])
+			continue;
+		ret = nni;
+		best = nno->saw[nni->num];
+		if (best == 1 || am_server) /* The server side stops at the first acceptable client choice */
+			break;
+	}
+	if (ret) {
+		free(nno->saw);
+		nno->saw = NULL;
+		nno->negotiated_nni = ret->main_nni ? ret->main_nni : ret;
+		return 1;
+	}
+	return 0;
+}
+
+/* This routine is always called with a tmpbuf of MAX_NSTR_STRLEN length, but the
+ * buffer may be pre-populated with a "len" length string to use OR a len of -1
+ * to tell us to read a string from the fd. */
+static void recv_negotiate_str(int f_in, struct name_num_obj *nno, char *tmpbuf, int len)
+{
+	if (len < 0)
+		len = read_vstring(f_in, tmpbuf, MAX_NSTR_STRLEN);
+
+	if (DEBUG_GTE(NSTR, am_server ? 3 : 2)) {
+		if (am_server)
+			rprintf(FINFO, "Client %s list (on server): %s\n", nno->type, tmpbuf);
+		else
+			rprintf(FINFO, "Server %s list (on client): %s\n", nno->type, tmpbuf);
+	}
+
+	if (len > 0 && parse_negotiate_str(nno, tmpbuf))
+		return;
+
+	if (!am_server || !do_negotiated_strings) {
+		char *cp = tmpbuf;
+		int j;
+		rprintf(FERROR, "Failed to negotiate a %s choice.\n", nno->type);
+		rprintf(FERROR, "%s list: %s\n", am_server ? "Client" : "Server", tmpbuf);
+		/* Recreate our original list from the saw values. This can't overflow our huge
+		 * buffer because we don't have enough valid entries to get anywhere close. */
+		for (j = 1, *cp = '\0'; j <= nno->saw_len; j++) {
+			struct name_num_item *nni;
+			for (nni = nno->list; nni->name; nni++) {
+				if (nno->saw[nni->num] == j) {
+					*cp++ = ' ';
+					cp += strlcpy(cp, nni->name, MAX_NSTR_STRLEN - (cp - tmpbuf));
+					break;
+				}
+			}
+		}
+		if (!*tmpbuf)
+			strlcpy(cp, " INVALID", MAX_NSTR_STRLEN);
+		rprintf(FERROR, "%s list:%s\n", am_server ? "Server" : "Client", tmpbuf);
+	}
+
+	exit_cleanup(RERR_UNSUPPORTED);
+}
+
+static const char *getenv_nstr(int ntype)
+{
+	const char *env_str = getenv(ntype == NSTR_COMPRESS ? "RSYNC_COMPRESS_LIST" : "RSYNC_CHECKSUM_LIST");
+
+	/* When writing a batch file, we always negotiate an old-style choice. */
+	if (write_batch)
+		env_str = ntype == NSTR_COMPRESS ? "zlib" : protocol_version >= 30 ? "md5" : "md4";
+
+	if (am_server && env_str) {
+		const char *cp = strchr(env_str, '&');
+		if (cp)
+			env_str = cp + 1;
+	}
+
+	return env_str;
+}
+
+void validate_choice_vs_env(int ntype, int num1, int num2)
+{
+	struct name_num_obj *nno = ntype == NSTR_COMPRESS ? &valid_compressions : &valid_checksums;
+	const char *list_str = getenv_nstr(ntype);
+	char tmpbuf[MAX_NSTR_STRLEN];
+
+	if (!list_str)
+		return;
+
+	while (isSpace(list_str)) list_str++;
+
+	if (!*list_str)
+		return;
+
+	init_nno_saw(nno, 0);
+	parse_nni_str(nno, list_str, tmpbuf, MAX_NSTR_STRLEN);
+
+	if (ntype == NSTR_CHECKSUM) /* If "md4" is in the env list, all the old MD4 choices are OK too. */
+		nno->saw[CSUM_MD4_ARCHAIC] = nno->saw[CSUM_MD4_BUSTED] = nno->saw[CSUM_MD4_OLD] = nno->saw[CSUM_MD4];
+
+	if (!nno->saw[num1] || (num2 >= 0 && !nno->saw[num2])) {
+		rprintf(FERROR, "Your --%s-choice value (%s) was refused by the server.\n",
+			ntype == NSTR_COMPRESS ? "compress" : "checksum",
+			ntype == NSTR_COMPRESS ? compress_choice : checksum_choice);
+		exit_cleanup(RERR_UNSUPPORTED);
+	}
+
+	free(nno->saw);
+	nno->saw = NULL;
+}
+
+/* The saw buffer is initialized and used to store ordinal values from 1 to N
+ * for the order of the args in the array.  If dup_markup == '\0', duplicates
+ * are removed otherwise the char is prefixed to the duplicate term and, if it
+ * is an opening paren/bracket/brace, the matching closing char is suffixed.
+ * "none" is removed on the client side unless dup_markup != '\0'. */
+int get_default_nno_list(struct name_num_obj *nno, char *to_buf, int to_buf_len, char dup_markup)
+{
+	struct name_num_item *nni;
+	int len = 0, cnt = 0;
+	char delim = '\0', post_delim;
+
+	switch (dup_markup) {
+	case '(': post_delim = ')'; break;
+	case '[': post_delim = ']'; break;
+	case '{': post_delim = '}'; break;
+	default: post_delim = '\0'; break;
+	}
+
+	init_nno_saw(nno, 0);
+
+	for (nni = nno->list, len = 0; nni->name; nni++) {
+		if (nni->num == CSUM_gone)
+			continue;
+		if (nni->main_nni) {
+			if (!dup_markup || nni->main_nni->num == CSUM_gone)
+				continue;
+			delim = dup_markup;
+		}
+		if (nni->num == 0 && !am_server && !dup_markup)
+			continue;
+		if (len)
+			to_buf[len++]= ' ';
+		if (delim) {
+			to_buf[len++]= delim;
+			delim = post_delim;
+		}
+		len += strlcpy(to_buf+len, nni->name, to_buf_len - len);
+		if (len >= to_buf_len - 3)
+			exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE... */
+		if (delim) {
+			to_buf[len++]= delim;
+			delim = '\0';
+		}
+		nno->saw[nni->num] = ++cnt;
+	}
+
+	return len;
+}
+
+static void send_negotiate_str(int f_out, struct name_num_obj *nno, int ntype)
+{
+	char tmpbuf[MAX_NSTR_STRLEN];
+	const char *list_str = getenv_nstr(ntype);
+	int len;
+
+	if (list_str && *list_str) {
+		init_nno_saw(nno, 0);
+		len = parse_nni_str(nno, list_str, tmpbuf, MAX_NSTR_STRLEN);
+		list_str = tmpbuf;
+	} else
+		list_str = NULL;
+
+	if (!list_str || !*list_str)
+		len = get_default_nno_list(nno, tmpbuf, MAX_NSTR_STRLEN, '\0');
+
+	if (DEBUG_GTE(NSTR, am_server ? 3 : 2)) {
+		if (am_server)
+			rprintf(FINFO, "Server %s list (on server): %s\n", nno->type, tmpbuf);
+		else
+			rprintf(FINFO, "Client %s list (on client): %s\n", nno->type, tmpbuf);
+	}
+
+	/* Each side sends their list of valid names to the other side and then both sides
+	 * pick the first name in the client's list that is also in the server's list. */
+	if (do_negotiated_strings)
+		write_vstring(f_out, tmpbuf, len);
+}
+
+static void negotiate_the_strings(int f_in, int f_out)
+{
+	/* We send all the negotiation strings before we start to read them to help avoid a slow startup. */
+
+	init_checksum_choices();
+
+	if (!checksum_choice)
+		send_negotiate_str(f_out, &valid_checksums, NSTR_CHECKSUM);
+
+	if (do_compression && !compress_choice)
+		send_negotiate_str(f_out, &valid_compressions, NSTR_COMPRESS);
+
+	if (valid_checksums.saw) {
+		char tmpbuf[MAX_NSTR_STRLEN];
+		int len;
+		if (do_negotiated_strings)
+			len = -1;
+		else
+			len = strlcpy(tmpbuf, protocol_version >= 30 ? "md5" : "md4", MAX_NSTR_STRLEN);
+		recv_negotiate_str(f_in, &valid_checksums, tmpbuf, len);
+	}
+
+	if (valid_compressions.saw) {
+		char tmpbuf[MAX_NSTR_STRLEN];
+		int len;
+		if (do_negotiated_strings)
+			len = -1;
+		else
+			len = strlcpy(tmpbuf, "zlib", MAX_NSTR_STRLEN);
+		recv_negotiate_str(f_in, &valid_compressions, tmpbuf, len);
+	}
+
+	/* If the other side is too old to negotiate, the above steps just made sure that
+	 * the env didn't disallow the old algorithm. Mark things as non-negotiated. */
+	if (!do_negotiated_strings)
+		valid_checksums.negotiated_nni = valid_compressions.negotiated_nni = NULL;
+}
+
 void setup_protocol(int f_out,int f_in)
 {
-	if (am_sender)
-		file_extra_cnt += PTR_EXTRA_CNT;
+	assert(file_extra_cnt == 0);
+	assert(EXTRA64_CNT == 2 || EXTRA64_CNT == 1);
+
+	/* All int64 values must be set first so that they are guaranteed to be
+	 * aligned for direct int64-pointer memory access. */
+	if (preserve_atimes)
+		atimes_ndx = (file_extra_cnt += EXTRA64_CNT);
+	if (preserve_crtimes)
+		crtimes_ndx = (file_extra_cnt += EXTRA64_CNT);
+	if (am_sender) /* This is most likely in the file_extras64 union as well. */
+		pathname_ndx = (file_extra_cnt += PTR_EXTRA_CNT);
 	else
-		file_extra_cnt++;
+		depth_ndx = ++file_extra_cnt;
 	if (preserve_uid)
 		uid_ndx = ++file_extra_cnt;
 	if (preserve_gid)
@@ -117,6 +594,9 @@ void setup_protocol(int f_out,int f_in)
 	if (preserve_xattrs)
 		xattrs_ndx = ++file_extra_cnt;
 
+	if (am_server)
+		set_allow_inc_recurse();
+
 	if (remote_protocol == 0) {
 		if (am_server && !local_server)
 			check_sub_protocol();
@@ -132,14 +612,14 @@ void setup_protocol(int f_out,int f_in)
 		exit_cleanup(RERR_PROTOCOL);
 	}
 
-	if (verbose > 3) {
+	if (DEBUG_GTE(PROTO, 1)) {
 		rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
 			am_server? "Server" : "Client", remote_protocol, protocol_version);
 	}
 	if (remote_protocol < MIN_PROTOCOL_VERSION
 	 || remote_protocol > MAX_PROTOCOL_VERSION) {
 		rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
-		rprintf(FERROR,"(see the rsync man page for an explanation)\n");
+		rprintf(FERROR,"(see the rsync manpage for an explanation)\n");
 		exit_cleanup(RERR_PROTOCOL);
 	}
 	if (remote_protocol < OLD_PROTOCOL_VERSION) {
@@ -156,22 +636,35 @@ void setup_protocol(int f_out,int f_in)
 			PROTOCOL_VERSION, am_server? "Server" : "Client");
 		exit_cleanup(RERR_PROTOCOL);
 	}
+	if (read_batch)
+		check_batch_flags();
+
+	if (!saw_stderr_opt && protocol_version <= 28 && am_server)
+		msgs2stderr = 0; /* The client side may not have stderr setup for us. */
+
+#ifndef SUPPORT_PREALLOCATION
+	if (preallocate_files && !am_sender) {
+		rprintf(FERROR, "preallocation is not supported on this %s\n",
+			am_server ? "Server" : "Client");
+		exit_cleanup(RERR_SYNTAX);
+	}
+#endif
 
 	if (protocol_version < 30) {
 		if (append_mode == 1)
 			append_mode = 2;
 		if (preserve_acls && !local_server) {
 			rprintf(FERROR,
-			    "--acls requires protocol 30 or higher"
-			    " (negotiated %d).\n",
-			    protocol_version);
+				"--acls requires protocol 30 or higher"
+				" (negotiated %d).\n",
+				protocol_version);
 			exit_cleanup(RERR_PROTOCOL);
 		}
 		if (preserve_xattrs && !local_server) {
 			rprintf(FERROR,
-			    "--xattrs requires protocol 30 or higher"
-			    " (negotiated %d).\n",
-			    protocol_version);
+				"--xattrs requires protocol 30 or higher"
+				" (negotiated %d).\n",
+				protocol_version);
 			exit_cleanup(RERR_PROTOCOL);
 		}
 	}
@@ -186,53 +679,121 @@ void setup_protocol(int f_out,int f_in)
 	if (protocol_version < 29) {
 		if (fuzzy_basis) {
 			rprintf(FERROR,
-			    "--fuzzy requires protocol 29 or higher"
-			    " (negotiated %d).\n",
-			    protocol_version);
+				"--fuzzy requires protocol 29 or higher"
+				" (negotiated %d).\n",
+				protocol_version);
 			exit_cleanup(RERR_PROTOCOL);
 		}
 
 		if (basis_dir_cnt && inplace) {
 			rprintf(FERROR,
-			    "%s with --inplace requires protocol 29 or higher"
-			    " (negotiated %d).\n",
-			    dest_option, protocol_version);
+				"%s with --inplace requires protocol 29 or higher"
+				" (negotiated %d).\n",
+				alt_dest_opt(0), protocol_version);
 			exit_cleanup(RERR_PROTOCOL);
 		}
 
 		if (basis_dir_cnt > 1) {
 			rprintf(FERROR,
-			    "Using more than one %s option requires protocol"
-			    " 29 or higher (negotiated %d).\n",
-			    dest_option, protocol_version);
+				"Using more than one %s option requires protocol"
+				" 29 or higher (negotiated %d).\n",
+				alt_dest_opt(0), protocol_version);
 			exit_cleanup(RERR_PROTOCOL);
 		}
 
 		if (prune_empty_dirs) {
 			rprintf(FERROR,
-			    "--prune-empty-dirs requires protocol 29 or higher"
-			    " (negotiated %d).\n",
-			    protocol_version);
+				"--prune-empty-dirs requires protocol 29 or higher"
+				" (negotiated %d).\n",
+				protocol_version);
 			exit_cleanup(RERR_PROTOCOL);
 		}
 	} else if (protocol_version >= 30) {
-		if (recurse && allow_inc_recurse
-		 && !delete_before && !delete_after && !delay_updates
-		 && !use_qsort && !prune_empty_dirs)
-			inc_recurse = 1;
+		if (am_server) {
+			compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
+#ifdef CAN_SET_SYMLINK_TIMES
+			compat_flags |= CF_SYMLINK_TIMES;
+#endif
+#ifdef ICONV_OPTION
+			compat_flags |= CF_SYMLINK_ICONV;
+#endif
+			if (strchr(client_info, 'f') != NULL)
+				compat_flags |= CF_SAFE_FLIST;
+			if (strchr(client_info, 'x') != NULL)
+				compat_flags |= CF_AVOID_XATTR_OPTIM;
+			if (strchr(client_info, 'C') != NULL)
+				compat_flags |= CF_CHKSUM_SEED_FIX;
+			if (strchr(client_info, 'I') != NULL)
+				compat_flags |= CF_INPLACE_PARTIAL_DIR;
+			if (strchr(client_info, 'u') != NULL)
+				compat_flags |= CF_ID0_NAMES;
+			if (strchr(client_info, 'v') != NULL) {
+				do_negotiated_strings = 1;
+				compat_flags |= CF_VARINT_FLIST_FLAGS;
+			}
+			if (strchr(client_info, 'V') != NULL) { /* Support a pre-release 'V' that got superseded */
+				if (!write_batch)
+					compat_flags |= CF_VARINT_FLIST_FLAGS;
+				write_byte(f_out, compat_flags);
+			} else
+				write_varint(f_out, compat_flags);
+		} else { /* read_varint() is compatible with the older write_byte() when the 0x80 bit isn't on. */
+			compat_flags = read_varint(f_in);
+			if  (compat_flags & CF_VARINT_FLIST_FLAGS)
+				do_negotiated_strings = 1;
+		}
+		/* The inc_recurse var MUST be set to 0 or 1. */
+		inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
+		want_xattr_optim = protocol_version >= 31 && !(compat_flags & CF_AVOID_XATTR_OPTIM);
+		proper_seed_order = compat_flags & CF_CHKSUM_SEED_FIX ? 1 : 0;
+		xfer_flags_as_varint = compat_flags & CF_VARINT_FLIST_FLAGS ? 1 : 0;
+		xmit_id0_names = compat_flags & CF_ID0_NAMES ? 1 : 0;
+		if (!xfer_flags_as_varint && preserve_crtimes) {
+			fprintf(stderr, "Both rsync versions must be at least 3.2.0 for --crtimes.\n");
+			exit_cleanup(RERR_PROTOCOL);
+		}
+		if (am_sender) {
+			receiver_symlink_times = am_server
+			    ? strchr(client_info, 'L') != NULL
+			    : !!(compat_flags & CF_SYMLINK_TIMES);
+		}
+#ifdef CAN_SET_SYMLINK_TIMES
+		else
+			receiver_symlink_times = 1;
+#endif
+#ifdef ICONV_OPTION
+		sender_symlink_iconv = iconv_opt && (am_server
+		    ? strchr(client_info, 's') != NULL
+		    : !!(compat_flags & CF_SYMLINK_ICONV));
+#endif
+		if (inc_recurse && !allow_inc_recurse) {
+			/* This should only be able to happen in a batch. */
+			fprintf(stderr,
+				"Incompatible options specified for inc-recursive %s.\n",
+				read_batch ? "batch file" : "connection");
+			exit_cleanup(RERR_SYNTAX);
+		}
+		use_safe_inc_flist = (compat_flags & CF_SAFE_FLIST) || protocol_version >= 31;
 		need_messages_from_generator = 1;
+		if (compat_flags & CF_INPLACE_PARTIAL_DIR)
+			inplace_partial = 1;
+#ifdef CAN_SET_SYMLINK_TIMES
+	} else if (!am_sender) {
+		receiver_symlink_times = 1;
+#endif
 	}
 
-#ifdef ICONV_OPTION
-	if (iconv_opt && (!am_sender || inc_recurse))
-		ic_ndx = ++file_extra_cnt;
-#endif
+	if (read_batch)
+		do_negotiated_strings = 0;
+
+	if (need_unsorted_flist && (!am_sender || inc_recurse))
+		unsort_ndx = ++file_extra_cnt;
 
 	if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
-		int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
+		int rflags = FILTRULE_NO_PREFIXES | FILTRULE_DIRECTORY;
 		if (!am_sender || protocol_version >= 30)
-			flags |= MATCHFLG_PERISHABLE;
-		parse_rule(&filter_list, partial_dir, flags, 0);
+			rflags |= FILTRULE_PERISHABLE;
+		parse_filter_str(&filter_list, partial_dir, rule_template(rflags), 0);
 	}
 
 
@@ -245,11 +806,87 @@ void setup_protocol(int f_out,int f_in)
 	}
 #endif
 
+	negotiate_the_strings(f_in, f_out);
+
 	if (am_server) {
 		if (!checksum_seed)
-			checksum_seed = time(NULL);
+			checksum_seed = time(NULL) ^ (getpid() << 6);
 		write_int(f_out, checksum_seed);
 	} else {
 		checksum_seed = read_int(f_in);
 	}
+
+	parse_checksum_choice(1); /* Sets file_sum_nni & xfer_sum_nni */
+	parse_compress_choice(1); /* Sets do_compression */
+
+	/* TODO in the future allow this algorithm to be chosen somehow, but it can't get too
+	 * long or the size starts to cause a problem in the xattr abbrev/non-abbrev code. */
+	xattr_sum_nni = parse_csum_name(NULL, 0);
+	xattr_sum_len = csum_len_for_type(xattr_sum_nni->num, 0);
+
+	if (write_batch && !am_server)
+		write_batch_shell_file();
+
+	init_flist();
+}
+
+void output_daemon_greeting(int f_out, int am_client)
+{
+	char tmpbuf[MAX_NSTR_STRLEN];
+	int our_sub = get_subprotocol_version();
+
+	init_checksum_choices();
+
+	get_default_nno_list(&valid_auth_checksums, tmpbuf, MAX_NSTR_STRLEN, '\0');
+
+	io_printf(f_out, "@RSYNCD: %d.%d %s\n", protocol_version, our_sub, tmpbuf);
+
+	if (am_client && DEBUG_GTE(NSTR, 2))
+		rprintf(FINFO, "Client %s list (on client): %s\n", valid_auth_checksums.type, tmpbuf);
+}
+
+void negotiate_daemon_auth(int f_out, int am_client)
+{
+	char tmpbuf[MAX_NSTR_STRLEN];
+	int save_am_server = am_server;
+	int md4_is_old = 0;
+
+	if (!am_client)
+		am_server = 1;
+
+	if (daemon_auth_choices)
+		strlcpy(tmpbuf, daemon_auth_choices, MAX_NSTR_STRLEN);
+	else {
+		strlcpy(tmpbuf, protocol_version >= 30 ? "md5" : "md4", MAX_NSTR_STRLEN);
+		md4_is_old = 1;
+	}
+
+	if (am_client) {
+		recv_negotiate_str(-1, &valid_auth_checksums, tmpbuf, strlen(tmpbuf));
+		if (DEBUG_GTE(NSTR, 1)) {
+			rprintf(FINFO, "Client negotiated %s: %s\n", valid_auth_checksums.type,
+				valid_auth_checksums.negotiated_nni->name);
+		}
+	} else {
+		if (!parse_negotiate_str(&valid_auth_checksums, tmpbuf)) {
+			get_default_nno_list(&valid_auth_checksums, tmpbuf, MAX_NSTR_STRLEN, '\0');
+			io_printf(f_out, "@ERROR: your client does not support one of our daemon-auth checksums: %s\n",
+				  tmpbuf);
+			exit_cleanup(RERR_UNSUPPORTED);
+		}
+	}
+	am_server = save_am_server;
+	if (md4_is_old && valid_auth_checksums.negotiated_nni->num == CSUM_MD4) {
+		valid_auth_checksums.negotiated_nni->num = CSUM_MD4_OLD;
+		valid_auth_checksums.negotiated_nni->flags = 0;
+	}
+}
+
+int get_subprotocol_version()
+{
+#if SUBPROTOCOL_VERSION != 0
+	return protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
+#else
+	return 0;
+#endif
 }

configure

@@ -0,0 +1,27 @@
+#!/bin/sh -e
+# This configure script ensures that the configure.sh script exists, and
+# if not, it tries to fetch rsync's generated files or build them.  We
+# then transfer control to the configure.sh script to do the real work.
+
+dir=`dirname $0`
+if test x"$dir" = x; then
+    dir=.
+fi
+
+if test "$dir" = '.'; then
+    branch=`packaging/prep-auto-dir` || exit 1
+    if test x"$branch" != x; then
+	cd build || exit 1
+	dir=..
+    fi
+fi
+
+if test ! -f configure.sh; then
+    if ! "$dir/prepare-source" build; then
+	echo 'Failed to build configure.sh and/or config.h.in -- giving up.' >&2
+	rm -f configure.sh
+	exit 1
+    fi
+fi
+
+exec ./configure.sh --srcdir="$dir" "${@}"

configure.in

@@ -1,963 +0,0 @@
-dnl Process this file with autoconf to produce a configure script.
-
-AC_INIT()
-AC_CONFIG_SRCDIR([byteorder.h])
-AC_CONFIG_HEADER(config.h)
-AC_PREREQ(2.59)
-
-RSYNC_VERSION=3.0.0pre1
-AC_SUBST(RSYNC_VERSION)
-AC_MSG_NOTICE([Configuring rsync $RSYNC_VERSION])
-
-AC_DEFINE_UNQUOTED(RSYNC_VERSION, ["$RSYNC_VERSION"], [rsync release version])
-
-LDFLAGS=${LDFLAGS-""}
-
-AC_CANONICAL_TARGET([])
-
-dnl Checks for programs.
-AC_PROG_CC
-AC_PROG_CPP
-AC_PROG_EGREP
-AC_PROG_INSTALL
-AC_PROG_CC_STDC
-AC_SUBST(SHELL)
-
-AC_DEFINE([_GNU_SOURCE], 1,
-          [Define _GNU_SOURCE so that we get all necessary prototypes])
-
-if test x"$ac_cv_prog_cc_stdc" = x"no"; then
-	AC_MSG_WARN([rsync requires an ANSI C compiler and you don't seem to have one])
-fi
-
-# We must decide this before testing the compiler.
-
-# Please allow this to default to yes, so that your users have more
-# chance of getting a useful stack trace if problems occur.
-
-AC_MSG_CHECKING([whether to include debugging symbols])
-AC_ARG_ENABLE(debug,
-	AC_HELP_STRING([--disable-debug],
-		[disable debugging symbols and features]))
-
-if test x"$enable_debug" = x"no"; then
-    AC_MSG_RESULT(no)
-    CFLAGS=${CFLAGS-"-O"}
-else
-    AC_MSG_RESULT([yes])
-    # leave CFLAGS alone; AC_PROG_CC will try to include -g if it can
-    dnl AC_DEFINE(DEBUG, 1, [Define to turn on debugging code that may slow normal operation])
-    dnl CFLAGS=${CFLAGS-"-g"}
-fi
-
-
-AC_ARG_ENABLE(profile,
-	AC_HELP_STRING([--enable-profile],
-		[turn on CPU profiling]))
-if test x"$enable_profile" = x"yes"; then
-	CFLAGS="$CFLAGS -pg"
-fi
-
-
-# Specifically, this turns on panic_action handling.
-AC_ARG_ENABLE(maintainer-mode,
-	AC_HELP_STRING([--enable-maintainer-mode],
-		[turn on extra debug features]))
-if test x"$enable_maintainer_mode" = x"yes"; then
-	CFLAGS="$CFLAGS -DMAINTAINER_MODE"
-fi
-
-
-# This is needed for our included version of popt.  Kind of silly, but
-# I don't want our version too far out of sync.
-CFLAGS="$CFLAGS -DHAVE_CONFIG_H"
-
-# If GCC, turn on warnings.
-if test x"$GCC" = x"yes"; then
-	CFLAGS="$CFLAGS -Wall -W"
-fi
-
-AC_ARG_WITH(included-popt,
-        AC_HELP_STRING([--with-included-popt], [use bundled popt library, not from system]))
-
-AC_ARG_WITH(rsync-path,
-	AC_HELP_STRING([--with-rsync-path=PATH], [set default --rsync-path to PATH (default: rsync)]),
-	[ RSYNC_PATH="$with_rsync_path" ],
-	[ RSYNC_PATH="rsync" ])
-
-AC_DEFINE_UNQUOTED(RSYNC_PATH, "$RSYNC_PATH", [location of rsync on remote machine])
-
-AC_ARG_WITH(rsyncd-conf,
-	AC_HELP_STRING([--with-rsyncd-conf=PATH], [set configuration file for rsync server to PATH (default: /etc/rsyncd.conf)]),
-	[ if test ! -z "$with_rsyncd_conf" ; then
-		case $with_rsyncd_conf in
-			yes|no)
-				RSYNCD_SYSCONF="/etc/rsyncd.conf"
-				;;
-			/*)
-				RSYNCD_SYSCONF="$with_rsyncd_conf"
-				;;
-			*)
-                                AC_MSG_ERROR(You must specify an absolute path to --with-rsyncd-conf=PATH)
-				;;
-		esac
-	else
-		RSYNCD_SYSCONF="/etc/rsyncd.conf"
-	fi ],
-	[ RSYNCD_SYSCONF="/etc/rsyncd.conf" ])
-
-AC_DEFINE_UNQUOTED(RSYNCD_SYSCONF, "$RSYNCD_SYSCONF", [location of configuration file for rsync server])
-
-AC_ARG_WITH(rsh,
-	AC_HELP_STRING([--with-rsh=CMD], [set remote shell command to CMD (default: ssh)]))
-
-AC_CHECK_PROG(HAVE_REMSH, remsh, 1, 0)
-if test x$HAVE_REMSH = x1; then
-	AC_DEFINE(HAVE_REMSH, 1, [Define to 1 if remote shell is remsh, not rsh])
-fi
-
-if test x"$with_rsh" != x; then
-	RSYNC_RSH="$with_rsh"
-else
-	RSYNC_RSH="ssh"
-fi
-AC_DEFINE_UNQUOTED(RSYNC_RSH, "$RSYNC_RSH", [default -e command])
-
-AC_ARG_WITH(nobody-group,
-    AC_HELP_STRING([--with-nobody-group=GROUP],
-		   [set the default unprivileged group (default nobody or nogroup)]),
-    [ NOBODY_GROUP="$with_nobody_group" ])
-
-if test x"$with_nobody_group" = x; then
-    AC_MSG_CHECKING([the group for user "nobody"])
-    if grep '^nobody:' /etc/group >/dev/null 2>&1; then
-	NOBODY_GROUP=nobody
-    elif grep '^nogroup:' /etc/group >/dev/null 2>&1; then
-	NOBODY_GROUP=nogroup
-    else
-	NOBODY_GROUP=nobody # test for others?
-    fi
-    AC_MSG_RESULT($NOBODY_GROUP)
-fi
-
-AC_DEFINE_UNQUOTED(NOBODY_USER, "nobody", [unprivileged user--e.g. nobody])
-AC_DEFINE_UNQUOTED(NOBODY_GROUP, "$NOBODY_GROUP", [unprivileged group for unprivileged user])
-
-# arrgh. libc in some old debian version screwed up the largefile
-# stuff, getting byte range locking wrong
-AC_CACHE_CHECK([for broken largefile support],rsync_cv_HAVE_BROKEN_LARGEFILE,[
-AC_TRY_RUN([
-#define _FILE_OFFSET_BITS 64
-#include <stdio.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-int main(void)
-{
-	struct flock lock;
-	int status;
-	char tpl[32] = "/tmp/locktest.XXXXXX";
-	int fd = mkstemp(tpl);
-	if (fd < 0) {
-		strcpy(tpl, "conftest.dat");
-		fd = open(tpl, O_CREAT|O_RDWR, 0600);
-	}
-
-	lock.l_type = F_WRLCK;
-	lock.l_whence = SEEK_SET;
-	lock.l_start = 0;
-	lock.l_len = 1;
-	lock.l_pid = 0;
-	fcntl(fd,F_SETLK,&lock);
-	if (fork() == 0) {
-		lock.l_start = 1;
-		_exit(fcntl(fd,F_SETLK,&lock) == 0);
-	}
-	wait(&status);
-	unlink(tpl);
-	exit(WEXITSTATUS(status));
-}
-],
-rsync_cv_HAVE_BROKEN_LARGEFILE=yes,rsync_cv_HAVE_BROKEN_LARGEFILE=no,rsync_cv_HAVE_BROKEN_LARGEFILE=cross)])
-if test x"$rsync_cv_HAVE_BROKEN_LARGEFILE" != x"yes"; then
-   AC_SYS_LARGEFILE
-fi
-
-ipv6type=unknown
-ipv6lib=none
-ipv6trylibc=yes
-
-AC_ARG_ENABLE(ipv6,
-	AC_HELP_STRING([--disable-ipv6],
-		[don't even try to use IPv6]))
-if test x"$enable_ipv6" != x"no"; then
-	AC_MSG_CHECKING([ipv6 stack type])
-	for i in inria kame linux-glibc linux-inet6 toshiba v6d zeta; do
-		case $i in
-		inria)
-			# http://www.kame.net/
-			AC_EGREP_CPP(yes, [
-#include <netinet/in.h>
-#ifdef IPV6_INRIA_VERSION
-yes
-#endif],
-				[ipv6type=$i;
-				AC_DEFINE(INET6, 1, [true if you have IPv6])
-				])
-			;;
-		kame)
-			# http://www.kame.net/
-			AC_EGREP_CPP(yes, [
-#include <netinet/in.h>
-#ifdef __KAME__
-yes
-#endif],
-				[ipv6type=$i;
-				AC_DEFINE(INET6, 1, [true if you have IPv6])])
-			;;
-		linux-glibc)
-			# http://www.v6.linux.or.jp/
-			AC_EGREP_CPP(yes, [
-#include <features.h>
-#if defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1
-yes
-#endif],
-				[ipv6type=$i;
-AC_DEFINE(INET6, 1, [true if you have IPv6])])
-			;;
-		linux-inet6)
-			# http://www.v6.linux.or.jp/
-			if test -d /usr/inet6 -o -f /usr/inet6/lib/libinet6.a; then
-				ipv6type=$i
-				ipv6lib=inet6
-				ipv6libdir=/usr/inet6/lib
-				ipv6trylibc=yes;
-				AC_DEFINE(INET6, 1, [true if you have IPv6])
-				CFLAGS="-I/usr/inet6/include $CFLAGS"
-			fi
-			;;
-		toshiba)
-			AC_EGREP_CPP(yes, [
-#include <sys/param.h>
-#ifdef _TOSHIBA_INET6
-yes
-#endif],
-				[ipv6type=$i;
-				ipv6lib=inet6;
-				ipv6libdir=/usr/local/v6/lib;
-				AC_DEFINE(INET6, 1, [true if you have IPv6])])
-			;;
-		v6d)
-			AC_EGREP_CPP(yes, [
-#include </usr/local/v6/include/sys/v6config.h>
-#ifdef __V6D__
-yes
-#endif],
-				[ipv6type=$i;
-				ipv6lib=v6;
-				ipv6libdir=/usr/local/v6/lib;
-				AC_DEFINE(INET6, 1, [true if you have IPv6])])
-			;;
-		zeta)
-			AC_EGREP_CPP(yes, [
-#include <sys/param.h>
-#ifdef _ZETA_MINAMI_INET6
-yes
-#endif],
-				[ipv6type=$i;
-				ipv6lib=inet6;
-				ipv6libdir=/usr/local/v6/lib;
-				AC_DEFINE(INET6, 1, [true if you have IPv6])])
-			;;
-		esac
-		if test "$ipv6type" != "unknown"; then
-			break
-		fi
-	done
-	AC_MSG_RESULT($ipv6type)
-
-	AC_SEARCH_LIBS(getaddrinfo, inet6)
-fi
-
-dnl Do you want to disable use of locale functions
-AC_ARG_ENABLE([locale],
-	AC_HELP_STRING([--disable-locale],
-		[disable locale features]))
-AH_TEMPLATE([CONFIG_LOCALE],
-[Undefine if you don't want locale features.  By default this is defined.])
-if test x"$enable_locale" != x"no"; then
-	AC_DEFINE(CONFIG_LOCALE)
-fi
-
-AC_MSG_CHECKING([whether to call shutdown on all sockets])
-case $host_os in
-	*cygwin* ) AC_MSG_RESULT(yes)
-                   AC_DEFINE(SHUTDOWN_ALL_SOCKETS, 1,
-			    [Define to 1 if sockets need to be shutdown])
-		   ;;
-	       * ) AC_MSG_RESULT(no);;
-esac
-
-AC_C_BIGENDIAN
-AC_HEADER_DIRENT
-AC_HEADER_TIME
-AC_HEADER_SYS_WAIT
-AC_CHECK_HEADERS(sys/fcntl.h sys/select.h fcntl.h sys/time.h sys/unistd.h \
-    unistd.h utime.h grp.h compat.h sys/param.h ctype.h sys/wait.h \
-    sys/ioctl.h sys/filio.h string.h stdlib.h sys/socket.h sys/mode.h \
-    sys/un.h glob.h mcheck.h arpa/inet.h arpa/nameser.h locale.h \
-    netdb.h malloc.h float.h limits.h iconv.h libcharset.h langinfo.h)
-AC_HEADER_MAJOR
-
-AC_CACHE_CHECK([if makedev takes 3 args],rsync_cv_MAKEDEV_TAKES_3_ARGS,[
-AC_TRY_RUN([
-#include <sys/types.h>
-#ifdef MAJOR_IN_MKDEV
-#include <sys/mkdev.h>
-# if !defined makedev && (defined mkdev || defined _WIN32 || defined __WIN32__)
-#  define makedev mkdev
-# endif
-#elif defined MAJOR_IN_SYSMACROS
-#include <sys/sysmacros.h>
-#endif
-
-int main(void)
-{
-	dev_t dev = makedev(0, 5, 7);
-	if (major(dev) != 5 || minor(dev) != 7)
-		exit(1);
-	return 0;
-}
-],
-rsync_cv_MAKEDEV_TAKES_3_ARGS=yes,rsync_cv_MAKEDEV_TAKES_3_ARGS=no,rsync_cv_MAKEDEV_TAKES_3_ARGS=no)])
-if test x"$rsync_cv_MAKEDEV_TAKES_3_ARGS" = x"yes"; then
-   AC_DEFINE(MAKEDEV_TAKES_3_ARGS, 1, [Define to 1 if makedev() takes 3 args])
-fi
-
-AC_CHECK_SIZEOF(int)
-AC_CHECK_SIZEOF(long)
-AC_CHECK_SIZEOF(long long)
-AC_CHECK_SIZEOF(short)
-AC_CHECK_SIZEOF(int16_t)
-AC_CHECK_SIZEOF(uint16_t)
-AC_CHECK_SIZEOF(int32_t)
-AC_CHECK_SIZEOF(uint32_t)
-AC_CHECK_SIZEOF(int64_t)
-AC_CHECK_SIZEOF(off_t)
-AC_CHECK_SIZEOF(off64_t)
-AC_CHECK_SIZEOF(time_t)
-
-AC_C_INLINE
-AC_C_LONG_DOUBLE
-
-AC_TYPE_SIGNAL
-AC_TYPE_UID_T
-AC_TYPE_MODE_T
-AC_TYPE_OFF_T
-AC_TYPE_SIZE_T
-AC_TYPE_PID_T
-AC_TYPE_GETGROUPS
-AC_CHECK_MEMBERS([struct stat.st_rdev])
-
-TYPE_SOCKLEN_T
-
-AC_CACHE_CHECK([for errno in errno.h],rsync_cv_errno, [
-    AC_TRY_COMPILE([#include <errno.h>],[int i = errno],
-	rsync_cv_errno=yes,rsync_cv_have_errno_decl=no)])
-if test x"$rsync_cv_errno" = x"yes"; then
-   AC_DEFINE(HAVE_ERRNO_DECL, 1, [Define to 1 if errno is declared in errno.h])
-fi
-
-# The following test taken from the cvs sources
-# If we can't find connect, try looking in -lsocket, -lnsl, and -linet.
-# These need checks to be before checks for any other functions that
-#    might be in the same libraries.
-# The Irix 5 libc.so has connect and gethostbyname, but Irix 5 also has
-# libsocket.so which has a bad implementation of gethostbyname (it
-# only looks in /etc/hosts), so we only look for -lsocket if we need
-# it.
-AC_CHECK_FUNCS(connect)
-if test x"$ac_cv_func_connect" = x"no"; then
-    case "$LIBS" in
-    *-lnsl*) ;;
-    *) AC_CHECK_LIB(nsl_s, printf) ;;
-    esac
-    case "$LIBS" in
-    *-lnsl*) ;;
-    *) AC_CHECK_LIB(nsl, printf) ;;
-    esac
-    case "$LIBS" in
-    *-lsocket*) ;;
-    *) AC_CHECK_LIB(socket, connect) ;;
-    esac
-    case "$LIBS" in
-    *-linet*) ;;
-    *) AC_CHECK_LIB(inet, connect) ;;
-    esac
-    dnl We can't just call AC_CHECK_FUNCS(connect) here, because the value
-    dnl has been cached.
-    if test x"$ac_cv_lib_socket_connect" = x"yes" ||
-       test x"$ac_cv_lib_inet_connect" = x"yes"; then
-        # ac_cv_func_connect=yes
-        # don't!  it would cause AC_CHECK_FUNC to succeed next time configure is run
-        AC_DEFINE(HAVE_CONNECT, 1, [Define to 1 if you have the "connect" function])
-    fi
-fi
-
-AC_SEARCH_LIBS(inet_ntop, resolv)
-
-# Solaris and HP-UX weirdness:
-# Search for libiconv_open (not iconv_open) to discover if -liconv is needed!
-AC_SEARCH_LIBS(libiconv_open, iconv)
-
-AC_MSG_CHECKING([for iconv declaration])
-AC_CACHE_VAL(am_cv_proto_iconv, [
-    AC_TRY_COMPILE([
-#include <stdlib.h>
-#include <iconv.h>
-extern
-#ifdef __cplusplus
-"C"
-#endif
-#if defined(__STDC__) || defined(__cplusplus)
-size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
-#else
-size_t iconv();
-#endif
-], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
-      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
-    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
-AC_MSG_RESULT([$]{ac_t:-
-         }[$]am_cv_proto_iconv)
-AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
-		   [Define as const if the declaration of iconv() needs const.])
-
-dnl AC_MSG_NOTICE([Looking in libraries: $LIBS])
-
-AC_CHECK_FUNCS(inet_ntop, , [AC_LIBOBJ(lib/inet_ntop)])
-AC_CHECK_FUNCS(inet_pton, , [AC_LIBOBJ(lib/inet_pton)])
-
-# Irix 6.5 has getaddrinfo but not the corresponding defines, so use
-#   builtin getaddrinfo if one of the defines don't exist
-AC_CACHE_CHECK([whether defines needed by getaddrinfo exist],
-               rsync_cv_HAVE_GETADDR_DEFINES,[
-			AC_EGREP_CPP(yes, [
-			#include <sys/types.h>
-			#include <sys/socket.h>
-			#include <netdb.h>
-			#ifdef AI_PASSIVE
-			yes
-			#endif],
-			rsync_cv_HAVE_GETADDR_DEFINES=yes,
-			rsync_cv_HAVE_GETADDR_DEFINES=no)])
-if test x"$rsync_cv_HAVE_GETADDR_DEFINES" = x"yes"; then
-	# Tru64 UNIX has getaddrinfo() but has it renamed in libc as
-	# something else so we must include <netdb.h> to get the
-	# redefinition.
-	AC_CHECK_FUNCS(getaddrinfo, ,
-		[AC_MSG_CHECKING([for getaddrinfo by including <netdb.h>])
-		AC_TRY_LINK([#include <sys/types.h>
-		#include <sys/socket.h>
-		#include <netdb.h>],[getaddrinfo(NULL, NULL, NULL, NULL);],
-			[AC_MSG_RESULT([yes])
-			AC_DEFINE(HAVE_GETADDRINFO, 1,
-				[Define to 1 if you have the "getaddrinfo" function.])],
-			[AC_MSG_RESULT([no])
-			AC_LIBOBJ(lib/getaddrinfo)])])
-	AC_CHECK_FUNCS(getnameinfo, , [AC_LIBOBJ(lib/getnameinfo)])
-else
-	AC_LIBOBJ(lib/getaddrinfo)
-	AC_LIBOBJ(lib/getnameinfo)
-fi
-
-AC_CHECK_MEMBER([struct sockaddr.sa_len],
-		[ AC_DEFINE(HAVE_SOCKADDR_LEN, 1, [Do we have sockaddr.sa_len?]) ],
-		[],
-		[
-#include <sys/types.h>
-#include <sys/socket.h>
-])
-
-AC_CHECK_MEMBER([struct sockaddr_in.sin_len],
-		[ AC_DEFINE(HAVE_SOCKADDR_IN_LEN, 1, [Do we have sockaddr_in.sin_len?]) ],
-		[],
-		[
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-])
-
-AC_CHECK_MEMBER([struct sockaddr_un.sun_len],
-		[ AC_DEFINE(HAVE_SOCKADDR_UN_LEN, 1, [Do we have sockaddr_un.sun_len?]) ],
-		[],
-		[
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-])
-
-AC_MSG_CHECKING(struct sockaddr_storage)
-AC_TRY_COMPILE([#include <sys/types.h>
-#include <sys/socket.h>],
-[struct sockaddr_storage x;],
-	AC_MSG_RESULT(yes)
-	AC_DEFINE(HAVE_SOCKADDR_STORAGE, 1,
-		[Define to 1 if you have struct sockaddr_storage.] ),
-	AC_MSG_RESULT(no))
-
-AC_CHECK_MEMBER([struct sockaddr_in6.sin6_scope_id],
-		[ AC_DEFINE(HAVE_SOCKADDR_IN6_SCOPE_ID, 1, [Do we have sockaddr_in6.sin6_scope_id?]) ],
-		[],
-		[
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-])
-
-AC_MSG_CHECKING(struct stat64)
-AC_TRY_COMPILE([#include <stdio.h>
-#if HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-#if HAVE_SYS_STAT_H
-# include <sys/stat.h>
-#endif
-#if STDC_HEADERS
-# include <stdlib.h>
-# include <stddef.h>
-#else
-# if HAVE_STDLIB_H
-#  include <stdlib.h>
-# endif
-#endif
-],[struct stat64 st;],
-    AC_MSG_RESULT(yes)
-	AC_DEFINE(HAVE_STRUCT_STAT64,1,[Define to 1 if you have struct stat64.]),
-    AC_MSG_RESULT(no))
-
-# if we can't find strcasecmp, look in -lresolv (for Unixware at least)
-#
-AC_CHECK_FUNCS(strcasecmp)
-if test x"$ac_cv_func_strcasecmp" = x"no"; then
-    AC_CHECK_LIB(resolv, strcasecmp)
-fi
-
-AC_CHECK_FUNCS(aclsort)
-if test x"$ac_cv_func_aclsort" = x"no"; then
-    AC_CHECK_LIB(sec, aclsort)
-fi
-
-dnl At the moment we don't test for a broken memcmp(), because all we
-dnl need to do is test for equality, not comparison, and it seems that
-dnl every platform has a memcmp that can do at least that.
-dnl AC_FUNC_MEMCMP
-
-AC_FUNC_UTIME_NULL
-AC_FUNC_ALLOCA
-AC_CHECK_FUNCS(waitpid wait4 getcwd strdup chown chmod lchmod mknod mkfifo \
-    fchmod fstat ftruncate strchr readlink link utime utimes lutimes strftime \
-    memmove lchown vsnprintf snprintf vasprintf asprintf setsid glob strpbrk \
-    strlcat strlcpy strtol mallinfo getgroups setgroups geteuid getegid \
-    setlocale setmode open64 lseek64 mkstemp64 mtrace va_copy __va_copy \
-    strerror putenv iconv_open locale_charset nl_langinfo getxattr \
-    extattr_get_link sigaction sigprocmask)
-
-AC_CHECK_FUNCS(getpgrp tcgetpgrp)
-if test $ac_cv_func_getpgrp = yes; then
-    AC_FUNC_GETPGRP
-fi
-
-AC_ARG_ENABLE(iconv,
-    AC_HELP_STRING([--disable-iconv],
-	    [disable rsync's --iconv option]),
-    [], [enable_iconv=$ac_cv_func_iconv_open])
-AH_TEMPLATE([ICONV_OPTION],
-[Define if you want the --iconv option.  Specifing a value will set the
-default iconv setting (a NULL means no --iconv processing by default).])
-if test x"$enable_iconv" != x"no"; then
-	if test x"$enable_iconv" = x"yes"; then
-		AC_DEFINE(ICONV_OPTION, NULL)
-	else
-		AC_DEFINE_UNQUOTED(ICONV_OPTION, "$enable_iconv")
-	fi
-	AC_DEFINE(UTF8_CHARSET, "UTF-8", [String to pass to iconv() for the UTF-8 charset.])
-fi
-
-AC_CACHE_CHECK([whether chown() modifies symlinks],rsync_cv_chown_modifies_symlink,[
-  AC_TRY_RUN([
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#include <stdlib.h>
-#include <errno.h>
-    main() {
-	char const *dangling_symlink = "conftest.dangle";
-	unlink(dangling_symlink);
-	if (symlink("conftest.no-such", dangling_symlink) < 0) abort();
-	if (chown(dangling_symlink, getuid(), getgid()) < 0 && errno == ENOENT) exit(1);
-	exit(0);
-    }],
-  rsync_cv_chown_modifies_symlink=yes,rsync_cv_chown_modifies_symlink=no,rsync_cv_chown_modifies_symlink=no)])
-if test $rsync_cv_chown_modifies_symlink = yes; then
-  AC_DEFINE(CHOWN_MODIFIES_SYMLINK, 1, [Define to 1 if chown modifies symlinks.])
-fi
-
-AC_CACHE_CHECK([whether link() can hard-link symlinks],rsync_cv_can_hardlink_symlink,[
-  AC_TRY_RUN([
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#include <stdlib.h>
-#include <errno.h>
-#define FILENAME "conftest.dangle"
-    main() {
-	unlink(FILENAME);
-	if (symlink("conftest.no-such", FILENAME) < 0) abort();
-	if (link(FILENAME, FILENAME "2") < 0) exit(1);
-	exit(0);
-    }],
-  rsync_cv_can_hardlink_symlink=yes,rsync_cv_can_hardlink_symlink=no,rsync_cv_can_hardlink_symlink=no)])
-if test $rsync_cv_can_hardlink_symlink = yes; then
-  AC_DEFINE(CAN_HARDLINK_SYMLINK, 1, [Define to 1 if link() can hard-link symlinks.])
-fi
-
-AC_CACHE_CHECK([whether link() can hard-link special files],rsync_cv_can_hardlink_special,[
-  AC_TRY_RUN([
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#include <stdlib.h>
-#include <errno.h>
-#define FILENAME "conftest.fifi"
-    main() {
-	unlink(FILENAME);
-	if (mkfifo(FILENAME, 0777) < 0) abort();
-	if (link(FILENAME, FILENAME "2") < 0) exit(1);
-	exit(0);
-    }],
-  rsync_cv_can_hardlink_special=yes,rsync_cv_can_hardlink_special=no,rsync_cv_can_hardlink_special=no)])
-if test $rsync_cv_can_hardlink_special = yes; then
-    AC_DEFINE(CAN_HARDLINK_SPECIAL, 1, [Define to 1 if link() can hard-link special files.])
-fi
-
-AC_CACHE_CHECK([for working socketpair],rsync_cv_HAVE_SOCKETPAIR,[
-AC_TRY_RUN([
-#include <sys/types.h>
-#include <sys/socket.h>
-
-main() {
-       int fd[2];
-       exit((socketpair(AF_UNIX, SOCK_STREAM, 0, fd) != -1) ? 0 : 1);
-}],
-rsync_cv_HAVE_SOCKETPAIR=yes,rsync_cv_HAVE_SOCKETPAIR=no,rsync_cv_HAVE_SOCKETPAIR=cross)])
-if test x"$rsync_cv_HAVE_SOCKETPAIR" = x"yes"; then
-    AC_DEFINE(HAVE_SOCKETPAIR, 1, [Define to 1 if you have the "socketpair" function])
-fi
-
-if test x"$with_included_popt" != x"yes"; then
-    AC_CHECK_LIB(popt, poptGetContext, , [with_included_popt=yes])
-fi
-
-AC_MSG_CHECKING([whether to use included libpopt])
-if test x"$with_included_popt" = x"yes"; then
-    AC_MSG_RESULT($srcdir/popt)
-    BUILD_POPT='$(popt_OBJS)'
-    CFLAGS="$CFLAGS -I$srcdir/popt"
-    if test x"$ALLOCA" != x
-    then
-	# this can be removed when/if we add an included alloca.c;
-	#  see autoconf documentation on AC_FUNC_ALLOCA
-	AC_MSG_WARN([included libpopt will use malloc, not alloca (which wastes a small amount of memory)])
-    fi
-else
-    AC_MSG_RESULT(no)
-fi
-
-AC_CACHE_CHECK([for unsigned char],rsync_cv_SIGNED_CHAR_OK,[
-AC_TRY_COMPILE([],[signed char *s = ""],
-rsync_cv_SIGNED_CHAR_OK=yes,rsync_cv_SIGNED_CHAR_OK=no)])
-if test x"$rsync_cv_SIGNED_CHAR_OK" = x"yes"; then
-    AC_DEFINE(SIGNED_CHAR_OK, 1, [Define to 1 if "signed char" is a valid type])
-fi
-
-AC_CACHE_CHECK([for broken readdir],rsync_cv_HAVE_BROKEN_READDIR,[
-AC_TRY_RUN([#include <sys/types.h>
-#include <dirent.h>
-main() { struct dirent *di; DIR *d = opendir("."); di = readdir(d);
-if (di && di->d_name[-2] == '.' && di->d_name[-1] == 0 &&
-di->d_name[0] == 0) exit(0); exit(1);} ],
-rsync_cv_HAVE_BROKEN_READDIR=yes,rsync_cv_HAVE_BROKEN_READDIR=no,rsync_cv_HAVE_BROKEN_READDIR=cross)])
-if test x"$rsync_cv_HAVE_BROKEN_READDIR" = x"yes"; then
-    AC_DEFINE(HAVE_BROKEN_READDIR, 1, [Define to 1 if readdir() is broken])
-fi
-
-AC_CACHE_CHECK([for utimbuf],rsync_cv_HAVE_UTIMBUF,[
-AC_TRY_COMPILE([#include <sys/types.h>
-#include <utime.h>],
-[struct utimbuf tbuf;  tbuf.actime = 0; tbuf.modtime = 1; exit(utime("foo.c",&tbuf));],
-rsync_cv_HAVE_UTIMBUF=yes,rsync_cv_HAVE_UTIMBUF=no)])
-if test x"$rsync_cv_HAVE_UTIMBUF" = x"yes"; then
-    AC_DEFINE(HAVE_UTIMBUF, 1, [Define to 1 if you have the "struct utimbuf" type])
-fi
-
-AC_CACHE_CHECK([if gettimeofday takes tz argument],rsync_cv_HAVE_GETTIMEOFDAY_TZ,[
-AC_TRY_COMPILE([#include <sys/time.h>
-#include <unistd.h>],
-[struct timeval tv; exit(gettimeofday(&tv, NULL));],
-rsync_cv_HAVE_GETTIMEOFDAY_TZ=yes,rsync_cv_HAVE_GETTIMEOFDAY_TZ=no)])
-if test x"$rsync_cv_HAVE_GETTIMEOFDAY_TZ" != x"no"; then
-    AC_DEFINE(HAVE_GETTIMEOFDAY_TZ, 1, [Define to 1 if gettimeofday() takes a time-zone arg])
-fi
-
-AC_CACHE_CHECK([for C99 vsnprintf],rsync_cv_HAVE_C99_VSNPRINTF,[
-AC_TRY_RUN([
-#include <sys/types.h>
-#include <stdarg.h>
-void foo(const char *format, ...) {
-       va_list ap;
-       int len;
-       char buf[5];
-
-       va_start(ap, format);
-       len = vsnprintf(0, 0, format, ap);
-       va_end(ap);
-       if (len != 5) exit(1);
-
-       if (snprintf(buf, 3, "hello") != 5 || strcmp(buf, "he") != 0) exit(1);
-
-       exit(0);
-}
-main() { foo("hello"); }
-],
-rsync_cv_HAVE_C99_VSNPRINTF=yes,rsync_cv_HAVE_C99_VSNPRINTF=no,rsync_cv_HAVE_C99_VSNPRINTF=cross)])
-if test x"$rsync_cv_HAVE_C99_VSNPRINTF" = x"yes"; then
-    AC_DEFINE(HAVE_C99_VSNPRINTF, 1, [Define to 1 if vsprintf has a C99-compatible return value])
-fi
-
-
-AC_CACHE_CHECK([for secure mkstemp],rsync_cv_HAVE_SECURE_MKSTEMP,[
-AC_TRY_RUN([#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-main() {
-  struct stat st;
-  char tpl[20]="/tmp/test.XXXXXX";
-  int fd = mkstemp(tpl);
-  if (fd == -1) exit(1);
-  unlink(tpl);
-  if (fstat(fd, &st) != 0) exit(1);
-  if ((st.st_mode & 0777) != 0600) exit(1);
-  exit(0);
-}],
-rsync_cv_HAVE_SECURE_MKSTEMP=yes,
-rsync_cv_HAVE_SECURE_MKSTEMP=no,
-rsync_cv_HAVE_SECURE_MKSTEMP=cross)])
-if test x"$rsync_cv_HAVE_SECURE_MKSTEMP" = x"yes"; then
-    case $target_os in
-    hpux*)
-	dnl HP-UX has a broken mkstemp() implementation they refuse to fix,
-	dnl so we noisily skip using it.  See HP change request JAGaf34426
-	dnl for details. (sbonds)
-	AC_MSG_WARN(Skipping broken HP-UX mkstemp() -- using mktemp() instead)
-	;;
-    *)
-	AC_DEFINE(HAVE_SECURE_MKSTEMP, 1, [Define to 1 if mkstemp() is available and works right])
-	;;
-    esac
-fi
-
-
-AC_CACHE_CHECK([if mknod creates FIFOs],rsync_cv_MKNOD_CREATES_FIFOS,[
-AC_TRY_RUN([
-#include <stdio.h>
-#include <sys/stat.h>
-#include <errno.h>
-main() { int rc, ec; char *fn = "fifo-test";
-unlink(fn); rc = mknod(fn,S_IFIFO,0600); ec = errno; unlink(fn);
-if (rc) {printf("(%d %d) ",rc,ec); return ec;}
-return 0;}],
-           rsync_cv_MKNOD_CREATES_FIFOS=yes,rsync_cv_MKNOD_CREATES_FIFOS=no,rsync_cv_MKNOD_CREATES_FIFOS=cross)])
-if test x"$rsync_cv_MKNOD_CREATES_FIFOS" = x"yes"; then
-    AC_DEFINE(MKNOD_CREATES_FIFOS, 1, [Define to 1 if mknod() can create FIFOs.])
-fi
-
-AC_CACHE_CHECK([if mknod creates sockets],rsync_cv_MKNOD_CREATES_SOCKETS,[
-AC_TRY_RUN([
-#include <stdio.h>
-#include <sys/stat.h>
-#include <errno.h>
-main() { int rc, ec; char *fn = "sock-test";
-unlink(fn); rc = mknod(fn,S_IFSOCK,0600); ec = errno; unlink(fn);
-if (rc) {printf("(%d %d) ",rc,ec); return ec;}
-return 0;}],
-           rsync_cv_MKNOD_CREATES_SOCKETS=yes,rsync_cv_MKNOD_CREATES_SOCKETS=no,rsync_cv_MKNOD_CREATES_SOCKETS=cross)])
-if test x"$rsync_cv_MKNOD_CREATES_SOCKETS" = x"yes"; then
-    AC_DEFINE(MKNOD_CREATES_SOCKETS, 1, [Define to 1 if mknod() can create sockets.])
-fi
-
-#
-# The following test was mostly taken from the tcl/tk plus patches
-#
-AC_CACHE_CHECK([whether -c -o works],rsync_cv_DASHC_WORKS_WITH_DASHO,[
-rm -rf conftest*
-cat > conftest.$ac_ext <<EOF
-int main() { return 0; }
-EOF
-${CC-cc} -c -o conftest..o conftest.$ac_ext
-if test -f conftest..o; then
-    rsync_cv_DASHC_WORKS_WITH_DASHO=yes
-else
-    rsync_cv_DASHC_WORKS_WITH_DASHO=no
-fi
-rm -rf conftest*
-])
-if test x"$rsync_cv_DASHC_WORKS_WITH_DASHO" = x"yes"; then
-    OBJ_SAVE="#"
-    OBJ_RESTORE="#"
-    CC_SHOBJ_FLAG='-o $@'
-else
-    OBJ_SAVE='	@b=`basename $@ .o`;rm -f $$b.o.sav;if test -f $$b.o; then mv $$b.o $$b.o.sav;fi;'
-    OBJ_RESTORE='	@b=`basename $@ .o`;if test "$$b.o" != "$@"; then mv $$b.o $@; if test -f $$b.o.sav; then mv $$b.o.sav $$b.o; fi; fi'
-    CC_SHOBJ_FLAG=""
-fi
-
-AC_SUBST(OBJ_SAVE)
-AC_SUBST(OBJ_RESTORE)
-AC_SUBST(CC_SHOBJ_FLAG)
-AC_SUBST(BUILD_POPT)
-
-AC_CHECK_HEADERS(sys/acl.h acl/libacl.h)
-AC_CHECK_FUNCS(_acl __acl _facl __facl)
-#################################################
-# check for ACL support
-
-AC_MSG_CHECKING([whether to support ACLs])
-AC_ARG_ENABLE(acl-support,
-	AC_HELP_STRING([--disable-acl-support],
-		       [disable ACL support]))
-
-if test x"$enable_acl_support" = x"no"; then
-    AC_MSG_RESULT(no)
-else
-    case "$host_os" in
-    *sysv5*)
-	AC_MSG_RESULT(Using UnixWare ACLs)
-	AC_DEFINE(HAVE_UNIXWARE_ACLS, 1, [true if you have UnixWare ACLs])
-	AC_DEFINE(SUPPORT_ACLS, 1, [Define to 1 to add support for ACLs])
-	;;
-    *solaris*|*cygwin*)
-	AC_MSG_RESULT(Using solaris ACLs)
-	AC_DEFINE(HAVE_SOLARIS_ACLS, 1, [true if you have solaris ACLs])
-	AC_DEFINE(SUPPORT_ACLS, 1)
-	;;
-    *hpux*)
-	AC_MSG_RESULT(Using HPUX ACLs)
-	AC_DEFINE(HAVE_HPUX_ACLS, 1, [true if you have HPUX ACLs])
-	AC_DEFINE(SUPPORT_ACLS, 1)
-	;;
-    *irix*)
-	AC_MSG_RESULT(Using IRIX ACLs)
-	AC_DEFINE(HAVE_IRIX_ACLS, 1, [true if you have IRIX ACLs])
-	AC_DEFINE(SUPPORT_ACLS, 1)
-	;;
-    *aix*)
-	AC_MSG_RESULT(Using AIX ACLs)
-	AC_DEFINE(HAVE_AIX_ACLS, 1, [true if you have AIX ACLs])
-	AC_DEFINE(SUPPORT_ACLS, 1)
-	;;
-    *osf*)
-	AC_MSG_RESULT(Using Tru64 ACLs)
-	AC_DEFINE(HAVE_TRU64_ACLS, 1, [true if you have Tru64 ACLs])
-	AC_DEFINE(SUPPORT_ACLS, 1)
-	LIBS="$LIBS -lpacl"
-	;;
-    darwin*)
-	AC_MSG_RESULT(Using OS X ACLs)
-	AC_DEFINE(HAVE_OSX_ACLS, 1, [true if you have Mac OS X ACLs])
-	AC_DEFINE(SUPPORT_ACLS, 1)
-	;;
-    *)
-	AC_MSG_RESULT(running tests:)
-	AC_CHECK_LIB(acl,acl_get_file)
-	    AC_CACHE_CHECK([for ACL support],samba_cv_HAVE_POSIX_ACLS,[
-	    AC_TRY_LINK([#include <sys/types.h>
-#include <sys/acl.h>],
-[ acl_t acl; int entry_id; acl_entry_t *entry_p; return acl_get_entry( acl, entry_id, entry_p);],
-samba_cv_HAVE_POSIX_ACLS=yes,samba_cv_HAVE_POSIX_ACLS=no)])
-	AC_MSG_CHECKING(ACL test results)
-	if test x"$samba_cv_HAVE_POSIX_ACLS" = x"yes"; then
-	    AC_MSG_RESULT(Using posix ACLs)
-	    AC_DEFINE(HAVE_POSIX_ACLS, 1, [true if you have posix ACLs])
-	    AC_DEFINE(SUPPORT_ACLS, 1)
-	    AC_CACHE_CHECK([for acl_get_perm_np],samba_cv_HAVE_ACL_GET_PERM_NP,[
-		AC_TRY_LINK([#include <sys/types.h>
-#include <sys/acl.h>],
-[ acl_permset_t permset_d; acl_perm_t perm; return acl_get_perm_np( permset_d, perm);],
-samba_cv_HAVE_ACL_GET_PERM_NP=yes,samba_cv_HAVE_ACL_GET_PERM_NP=no)])
-	    if test x"$samba_cv_HAVE_ACL_GET_PERM_NP" = x"yes"; then
-		AC_DEFINE(HAVE_ACL_GET_PERM_NP, 1, [true if you have acl_get_perm_np])
-	    fi
-	else
-	    if test x"$enable_acl_support" = x"yes"; then
-		AC_MSG_ERROR(Failed to find ACL support)
-	    else
-		AC_MSG_RESULT(No ACL support found)
-	    fi
-	fi
-	;;
-    esac
-fi
-
-AC_CHECK_HEADERS(attr/xattr.h)
-AC_CHECK_HEADERS(sys/xattr.h)
-AC_CHECK_HEADERS(sys/extattr.h)
-
-#################################################
-# check for extended attribute support
-AC_MSG_CHECKING(whether to support extended attributes)
-AC_ARG_ENABLE(xattr-support,
-    AC_HELP_STRING([--disable-xattr-support],
-	    [disable extended attributes]),
-    [], [case "$ac_cv_func_getxattr$ac_cv_func_extattr_get_link" in
-	*yes*) enable_xattr_support=maybe ;;
-	*) enable_xattr_support=no ;;
-	esac])
-AH_TEMPLATE([SUPPORT_XATTRS],
-[Define to 1 to add support for extended attributes])
-if test x"$enable_xattr_support" = x"no"; then
-    AC_MSG_RESULT(no)
-else
-    case "$host_os" in
-    *linux*)
-	AC_MSG_RESULT(Using Linux xattrs)
-	AC_DEFINE(HAVE_LINUX_XATTRS, 1, [True if you have Linux xattrs])
-	AC_DEFINE(SUPPORT_XATTRS, 1)
-	;;
-    darwin*)
-	AC_MSG_RESULT(Using OS X xattrs)
-	AC_DEFINE(HAVE_OSX_XATTRS, 1, [True if you have Mac OS X xattrs])
-	AC_DEFINE(SUPPORT_XATTRS, 1)
-	;;
-    freebsd*)
-	AC_MSG_RESULT(Using FreeBSD extattrs)
-	AC_DEFINE(HAVE_FREEBSD_XATTRS, 1, [True if you have FreeBSD xattrs])
-	AC_DEFINE(SUPPORT_XATTRS, 1)
-	;;
-    *)
-	if test x"$enable_xattr_support" = x"yes"; then
-	    AC_MSG_ERROR(Failed to find extended attribute support)
-	else
-	    AC_MSG_RESULT(No extended attribute support found)
-	fi
-	;;
-    esac
-fi
-
-AC_CONFIG_FILES([Makefile lib/dummy zlib/dummy popt/dummy shconfig])
-AC_OUTPUT
-
-AC_MSG_RESULT()
-AC_MSG_RESULT([    rsync ${RSYNC_VERSION} configuration successful])
-AC_MSG_RESULT()

connection.c

@@ -2,6 +2,7 @@
  * Support the max connections option.
  *
  * Copyright (C) 1998 Andrew Tridgell
+ * Copyright (C) 2006-2020 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

csprotocol.txt

@@ -3,42 +3,58 @@ basically a summary of clientserver.c and authenticate.c.
 
  -- Martin Pool <mbp@samba.org>
 
-$Id$
-
-
-
 
 This is the protocol used for rsync --daemon; i.e. connections to port
 873 rather than invocations over a remote shell.
 
-When the server accepts a connection, it prints a greeting
+When the server accepts a connection, it prints a newline-terminated
+greeting line:
 
-  @RSYNCD: <version>
+  @RSYNCD: <version>.<subprotocol> <digest1> <digestN>
 
-where <version> is the numeric version; currently 24.  It follows this
-with a free text message-of-the-day.  It expects to see a similar
-greeting back from the client.
+The <version> is the numeric version (see PROTOCOL_VERSION in rsync.h)
+The <subprotocol> is the numeric subprotocol version (which is 0 for a
+final protocol version, as the SUBPROTOCOL_VERSION define discusses).
+The <digestN> names are the authentication digest algorithms that the
+daemon supports, listed in order of preference.
+
+An rsync prior to 3.2.7 omits the digest names.  An rsync prior to 3.0.0
+also omits the period and the <subprotocol> value.  Since a final
+protocol has a subprotocol value of 0, a missing subprotocol value is
+assumed to be 0 for any protocol prior to 30.  It is considered a fatal
+error for protocol 30 and above to omit it.  It is considered a fatal
+error for protocol 32 and above to omit the digest name list (currently
+31 is the newest protocol).
+
+The daemon expects to see a similar greeting line back from the client.
+Once received, the daemon follows the opening line with a free-format
+text message-of-the-day (if any is defined).
 
 The server is now in the connected state.  The client can either send
-the command
+the command:
 
   #list
 
-to get a listing of modules, or the name of a module.  After this, the
+(to get a listing of modules) or the name of a module.  After this, the
 connection is now bound to a particular module.  Access per host for
 this module is now checked, as is per-module connection limits.
 
-If authentication is required to use this module, the server will say
+If authentication is required to use this module, the server will say:
 
   @RSYNCD: AUTHREQD <challenge>
 
 where <challenge> is a random string of base64 characters.  The client
-must respond with
+must respond with:
 
   <user> <response>
 
-where <user> is the username they claim to be, and <response> is the
-base64 form of the MD4 hash of challenge+password.
+The <user> is the username they claim to be. The <response> is the
+base64 form of the digest hash of the challenge+password string. The
+chosen digest method is the most preferred client method that is also in
+the server's list.  If no digest list was explicitly provided, the side
+expecting a list assumes the other side provided either the single name
+"md5" (for a negotiated protocol 30 or 31), or the single name "md4"
+(for an older protocol).
 
 At this point the server applies all remaining constraints before
 handing control to the client, including switching uid/gid, setting up
@@ -75,8 +91,20 @@ stay tuned (or write it yourself!).
 ------------
 Protocol version changes
 
-25	 (2001-08-20, 2.4.7pre2) 
+31	(2013-09-28, 3.1.0)
 
-	 Send an explicit "@RSYNC EXIT" command at the end of the
-	 module listing.  We never intentionally end the transmission
-	 by just closing the socket anymore.
+	Initial release of protocol 31 had no changes.  Rsync 3.2.7
+	introduced the suffixed list of digest names on the greeting
+	line.  The presence of the list is allowed even if the greeting
+	indicates an older protocol version number.
+
+30	(2007-10-04, 3.0.0pre1)
+
+	The use of a ".<subprotocol>" number was added to
+	@RSYNCD: <version>.<subprotocol>
+
+25	(2001-08-20, 2.4.7pre2) 
+
+	Send an explicit "@RSYNC EXIT" command at the end of the
+	module listing.  We never intentionally end the transmission
+	by just closing the socket anymore.

daemon-parm.awk

@@ -0,0 +1,114 @@
+#!/usr/bin/awk -f
+
+# The caller must pass arg: daemon-parm.txt
+# The resulting code is output into daemon-parm.h
+
+BEGIN {
+    heading = "/* DO NOT EDIT THIS FILE!  It is auto-generated from a list of values in " ARGV[1] "! */\n\n"
+    sect = psect = defines = accessors = prior_ptype = ""
+    parms = "\nstatic const struct parm_struct parm_table[] = {"
+    comment_fmt = "\n/********** %s **********/\n"
+    tdstruct = "typedef struct {"
+}
+
+/^\s*$/ { next }
+/^#/ { next }
+
+/^Globals:/ {
+    if (defines != "") {
+	print "The Globals section must come first!"
+	defines = ""
+	exit
+    }
+    defines = tdstruct
+    values = "\nstatic const all_vars Defaults = {\n    { /* Globals: */\n"
+    exps = exp_values = sprintf(comment_fmt, "EXP")
+    sect = "GLOBAL"
+    psect = ", P_GLOBAL, &Vars.g."
+    next
+}
+
+/^Locals:/ {
+    if (sect == "") {
+	print "The Locals section must come after the Globals!"
+	exit
+    }
+    defines = defines exps "} global_vars;\n\n" tdstruct
+    values = values exp_values "\n    }, { /* Locals: */\n"
+    exps = exp_values = sprintf(comment_fmt, "EXP")
+    sect = "LOCAL"
+    psect = ", P_LOCAL, &Vars.l."
+    next
+}
+
+/^(STRING|CHAR|PATH|INTEGER|ENUM|OCTAL|BOOL|BOOLREV|BOOL3)[ \t]/ {
+    ptype = $1
+    name = $2
+    $1 = $2 = ""
+    sub(/^[ \t]+/, "")
+
+    if (ptype != prior_ptype) {
+	comment = sprintf(comment_fmt, ptype)
+	defines = defines comment
+	values = values comment
+	parms = parms "\n"
+	accessors = accessors "\n"
+	prior_ptype = ptype
+    }
+
+    if (ptype == "STRING" || ptype == "PATH") {
+	atype = "STRING"
+	vtype = "char*"
+    } else if (ptype ~ /BOOL/) {
+	atype = vtype = "BOOL"
+    } else if (ptype == "CHAR") {
+	atype = "CHAR"
+	vtype = "char"
+    } else {
+	atype = "INTEGER"
+	vtype = "int"
+    }
+
+    # The name might be var_name|public_name
+    pubname = name
+    sub(/\|.*/, "", name)
+    sub(/.*\|/, "", pubname)
+    gsub(/_/, " ", pubname)
+    gsub(/-/, "", name)
+
+    if (ptype == "ENUM")
+	enum = "enum_" name
+    else
+	enum = "NULL"
+
+    defines = defines "\t" vtype " " name ";\n"
+    values = values "\t" $0 ", /* " name " */\n"
+    parms = parms " {\"" pubname "\", P_" ptype psect name ", " enum ", 0},\n"
+    accessors = accessors "FN_" sect "_" atype "(lp_" name ", " name ")\n"
+
+    if (vtype == "char*") {
+	exps = exps "\tBOOL " name "_EXP;\n"
+	exp_values = exp_values "\tFalse, /* " name "_EXP */\n"
+    }
+
+    next
+}
+
+/./ {
+    print "Extraneous line:" $0
+    defines = ""
+    exit
+}
+
+END {
+    if (sect != "" && defines != "") {
+	defines = defines exps "} local_vars;\n\n"
+	defines = defines tdstruct "\n\tglobal_vars g;\n\tlocal_vars l;\n} all_vars;\n"
+	values = values exp_values "\n    }\n};\n\nstatic all_vars Vars;\n"
+	parms = parms "\n {NULL, P_BOOL, P_NONE, NULL, NULL, 0}\n};\n"
+	print heading defines values parms accessors > "daemon-parm.h"
+    } else {
+	print "Failed to parse the data in " ARGV[1]
+	exit 1
+    }
+}

daemon-parm.txt

@@ -0,0 +1,68 @@
+Globals: ================================================================
+
+STRING	bind_address|address	NULL
+STRING	daemon_chroot		NULL
+STRING	daemon_gid		NULL
+STRING	daemon_uid		NULL
+STRING	motd_file		NULL
+STRING	pid_file		NULL
+STRING	socket_options		NULL
+
+INTEGER	listen_backlog		5
+INTEGER	rsync_port|port		0
+
+BOOL	proxy_protocol		False
+
+Locals: =================================================================
+
+STRING	auth_users		NULL
+STRING	charset			NULL
+STRING	comment			NULL
+STRING	dont_compress		DEFAULT_DONT_COMPRESS
+STRING	early_exec		NULL
+STRING	exclude			NULL
+STRING	exclude_from		NULL
+STRING	filter			NULL
+STRING	gid			NULL
+STRING	hosts_allow		NULL
+STRING	hosts_deny		NULL
+STRING	include			NULL
+STRING	include_from		NULL
+STRING	incoming_chmod		NULL
+STRING	lock_file		DEFAULT_LOCK_FILE
+STRING	log_file		NULL
+STRING	log_format		"%o %h [%a] %m (%u) %f %l"
+STRING	name			NULL
+STRING	name_converter		NULL
+STRING	outgoing_chmod		NULL
+STRING	post-xfer_exec		NULL
+STRING	pre-xfer_exec		NULL
+STRING	refuse_options		NULL
+STRING	secrets_file		NULL
+STRING	syslog_tag		"rsyncd"
+STRING	uid			NULL
+
+PATH	path			NULL
+PATH	temp_dir		NULL
+
+INTEGER	max_connections		0
+INTEGER	max_verbosity		1
+INTEGER	timeout			0
+
+ENUM	syslog_facility		LOG_DAEMON
+
+BOOL	fake_super		False
+BOOL	forward_lookup		True
+BOOL	ignore_errors		False
+BOOL	ignore_nonreadable	False
+BOOL	list			True
+BOOL	read_only		True
+BOOL	reverse_lookup		True
+BOOL	strict_modes		True
+BOOL	transfer_logging	False
+BOOL	write_only		False
+
+BOOL3	munge_symlinks		Unset
+BOOL3	numeric_ids		Unset
+BOOL3	open_noatime		Unset
+BOOL3	use_chroot		Unset

define-from-md.awk

@@ -0,0 +1,41 @@
+#!/usr/bin/awk -f
+
+# The caller must pass args: -v hfile=NAME rsync.1.md
+
+BEGIN {
+    heading = "/* DO NOT EDIT THIS FILE!  It is auto-generated from a list of values in " ARGV[1] "! */"
+    if (hfile ~ /compress/) {
+	define = "#define DEFAULT_DONT_COMPRESS"
+	prefix = "*."
+    } else {
+	define = "#define DEFAULT_CVSIGNORE"
+	prefix = ""
+    }
+    value_list = ""
+}
+
+/^    > [^ ]+$/ {
+    gsub(/`/, "")
+    if (value_list != "") value_list = value_list " "
+    value_list = value_list prefix $2
+    next
+}
+
+value_list ~ /\.gz / && hfile ~ /compress/ {
+    exit
+}
+
+value_list ~ /SCCS / && hfile ~ /cvsignore/ {
+    exit
+}
+
+value_list = ""
+
+END {
+    if (value_list != "")
+	print heading "\n\n" define " \"" value_list "\"" > hfile
+    else {
+	print "Failed to find a value list in " ARGV[1] " for " hfile
+	exit 1
+    }
+}

delete.c

@@ -0,0 +1,240 @@
+/*
+ * Deletion routines used in rsync.
+ *
+ * Copyright (C) 1996-2000 Andrew Tridgell
+ * Copyright (C) 1996 Paul Mackerras
+ * Copyright (C) 2002 Martin Pool <mbp@samba.org>
+ * Copyright (C) 2003-2024 Wayne Davison
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
+ */
+
+#include "rsync.h"
+
+extern int am_root;
+extern int make_backups;
+extern int max_delete;
+extern char *backup_dir;
+extern char *backup_suffix;
+extern int backup_suffix_len;
+extern struct stats stats;
+
+int ignore_perishable = 0;
+int non_perishable_cnt = 0;
+int skipped_deletes = 0;
+
+static inline int is_backup_file(char *fn)
+{
+	int k = strlen(fn) - backup_suffix_len;
+	return k > 0 && strcmp(fn+k, backup_suffix) == 0;
+}
+
+/* The directory is about to be deleted: if DEL_RECURSE is given, delete all
+ * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
+ * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
+ * buffer is used for recursion, but returned unchanged.)
+ */
+static enum delret delete_dir_contents(char *fname, uint16 flags)
+{
+	struct file_list *dirlist;
+	enum delret ret;
+	unsigned remainder;
+	void *save_filters;
+	int j, dlen;
+	char *p;
+
+	if (DEBUG_GTE(DEL, 3)) {
+		rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
+			fname, flags);
+	}
+
+	dlen = strlen(fname);
+	save_filters = push_local_filters(fname, dlen);
+
+	non_perishable_cnt = 0;
+	dirlist = get_dirlist(fname, dlen, 0);
+	ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
+
+	if (!dirlist->used)
+		goto done;
+
+	if (!(flags & DEL_RECURSE)) {
+		ret = DR_NOT_EMPTY;
+		goto done;
+	}
+
+	p = fname + dlen;
+	if (dlen != 1 || *fname != '/')
+		*p++ = '/';
+	remainder = MAXPATHLEN - (p - fname);
+
+	/* We do our own recursion, so make delete_item() non-recursive. */
+	flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
+	      | DEL_DIR_IS_EMPTY;
+
+	for (j = dirlist->used; j--; ) {
+		struct file_struct *fp = dirlist->files[j];
+
+		if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
+			if (DEBUG_GTE(DEL, 1)) {
+				rprintf(FINFO,
+					"mount point, %s, pins parent directory\n",
+					f_name(fp, NULL));
+			}
+			ret = DR_NOT_EMPTY;
+			continue;
+		}
+
+		strlcpy(p, fp->basename, remainder);
+		if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
+			do_chmod_at(fname, fp->mode | S_IWUSR);
+		/* Save stack by recursing to ourself directly. */
+		if (S_ISDIR(fp->mode)) {
+			if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
+				ret = DR_NOT_EMPTY;
+		}
+		if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
+			ret = DR_NOT_EMPTY;
+	}
+
+	fname[dlen] = '\0';
+
+  done:
+	flist_free(dirlist);
+	pop_local_filters(save_filters);
+
+	if (ret == DR_NOT_EMPTY) {
+		rprintf(FINFO, "cannot delete non-empty directory: %s\n",
+			fname);
+	}
+	return ret;
+}
+
+/* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
+ * delete recursively.
+ *
+ * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
+ * a directory! (The buffer is used for recursion, but returned unchanged.)
+ */
+enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
+{
+	enum delret ret;
+	char *what;
+	int ok;
+
+	if (DEBUG_GTE(DEL, 2)) {
+		rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
+			fbuf, (int)mode, (int)flags);
+	}
+
+	if (flags & DEL_NO_UID_WRITE)
+		do_chmod_at(fbuf, mode | S_IWUSR);
+
+	if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
+		/* This only happens on the first call to delete_item() since
+		 * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
+		ignore_perishable = 1;
+		/* If DEL_RECURSE is not set, this just reports emptiness. */
+		ret = delete_dir_contents(fbuf, flags);
+		ignore_perishable = 0;
+		if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
+			goto check_ret;
+		/* OK: try to delete the directory. */
+	}
+
+	if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && stats.deleted_files >= max_delete) {
+		skipped_deletes++;
+		return DR_AT_LIMIT;
+	}
+
+	if (S_ISDIR(mode)) {
+		what = "rmdir";
+		ok = do_rmdir_at(fbuf) == 0;
+	} else {
+		if (make_backups > 0 && !(flags & DEL_FOR_BACKUP) && (backup_dir || !is_backup_file(fbuf))) {
+			what = "make_backup";
+			ok = make_backup(fbuf, True);
+			if (ok == 2) {
+				what = "unlink";
+				ok = robust_unlink(fbuf) == 0;
+			}
+		} else {
+			what = "unlink";
+			ok = robust_unlink(fbuf) == 0;
+		}
+	}
+
+	if (ok) {
+		if (!(flags & DEL_MAKE_ROOM)) {
+			log_delete(fbuf, mode);
+			stats.deleted_files++;
+			if (S_ISREG(mode)) {
+				/* Nothing more to count */
+			} else if (S_ISDIR(mode))
+				stats.deleted_dirs++;
+#ifdef SUPPORT_LINKS
+			else if (S_ISLNK(mode))
+				stats.deleted_symlinks++;
+#endif
+			else if (IS_DEVICE(mode))
+				stats.deleted_devices++;
+			else
+				stats.deleted_specials++;
+		}
+		ret = DR_SUCCESS;
+	} else {
+		if (S_ISDIR(mode) && errno == ENOTEMPTY) {
+			rprintf(FINFO, "cannot delete non-empty directory: %s\n",
+				fbuf);
+			ret = DR_NOT_EMPTY;
+		} else if (errno != ENOENT) {
+			rsyserr(FERROR_XFER, errno, "delete_file: %s(%s) failed",
+				what, fbuf);
+			ret = DR_FAILURE;
+		} else
+			ret = DR_SUCCESS;
+	}
+
+  check_ret:
+	if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
+		const char *desc;
+		switch (flags & DEL_MAKE_ROOM) {
+		case DEL_FOR_FILE: desc = "regular file"; break;
+		case DEL_FOR_DIR: desc = "directory"; break;
+		case DEL_FOR_SYMLINK: desc = "symlink"; break;
+		case DEL_FOR_DEVICE: desc = "device file"; break;
+		case DEL_FOR_SPECIAL: desc = "special file"; break;
+		default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
+		}
+		rprintf(FERROR_XFER, "could not make way for %s %s: %s\n",
+			flags & DEL_FOR_BACKUP ? "backup" : "new",
+			desc, fbuf);
+	}
+	return ret;
+}
+
+uint16 get_del_for_flag(uint16 mode)
+{
+	if (S_ISREG(mode))
+		return DEL_FOR_FILE;
+	if (S_ISDIR(mode))
+		return DEL_FOR_DIR;
+	if (S_ISLNK(mode))
+		return DEL_FOR_SYMLINK;
+	if (IS_DEVICE(mode))
+		return DEL_FOR_DEVICE;
+	if (IS_SPECIAL(mode))
+		return DEL_FOR_SPECIAL;
+	exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
+}

doc/.cvsignore

@@ -1,2 +0,0 @@
-rsync.pdf
-rsync.ps

doc/README-SGML

@@ -1,20 +0,0 @@
-Handling the rsync SGML documentation
-
-rsync documentation is now primarily in Docbook format.  Docbook is an
-SGML/XML documentation format that is becoming standard on free
-operating systems.  It's also used for Samba documentation.
-
-The SGML files are source code that can be translated into various
-useful output formats, primarily PDF, HTML, Postscript and plain text.  
-
-To do this transformation on Debian, you should install the
-docbook-utils package.  Having done that, you can say 
-
-  docbook2pdf rsync.sgml
-
-and so on.
-
-On other systems you probably need James Clark's "sp" and "JadeTeX"
-packages.  Work it out for yourself and send a note to the mailing
-list.
-

doc/profile.txt

@@ -1,42 +0,0 @@
-Notes on rsync profiling
-
-strlcpy is hot:
-
-                0.00    0.00       1/7735635     push_dir [68]
-                0.00    0.00       1/7735635     pop_dir [71]
-                0.00    0.00       1/7735635     send_file_list [15]
-                0.01    0.00   18857/7735635     send_files [4]
-                0.04    0.00  129260/7735635     send_file_entry [18]
-                0.04    0.00  129260/7735635     make_file [20]
-                0.04    0.00  141666/7735635     send_directory <cycle 1> [36]
-                2.29    0.00 7316589/7735635     f_name [13]
-[14]    11.7    2.42    0.00 7735635         strlcpy [14]
-
-
-Here's the top few functions:
-
- 46.23      9.57     9.57 13160929     0.00     0.00  mdfour64
- 14.78     12.63     3.06 13160929     0.00     0.00  copy64
- 11.69     15.05     2.42  7735635     0.00     0.00  strlcpy
- 10.05     17.13     2.08    41438     0.05     0.38  sum_update
-  4.11     17.98     0.85 13159996     0.00     0.00  mdfour_update
-  1.50     18.29     0.31                             file_compare
-  1.45     18.59     0.30   129261     0.00     0.01  send_file_entry
-  1.23     18.84     0.26  2557585     0.00     0.00  f_name
-  1.11     19.07     0.23  1483750     0.00     0.00  u_strcmp
-  1.11     19.30     0.23   118129     0.00     0.00  writefd_unbuffered
-  0.92     19.50     0.19  1085011     0.00     0.00  writefd
-  0.43     19.59     0.09   156987     0.00     0.00  read_timeout
-  0.43     19.68     0.09   129261     0.00     0.00  clean_fname
-  0.39     19.75     0.08    32887     0.00     0.38  matched
-  0.34     19.82     0.07        1    70.00 16293.92  send_files
-  0.29     19.89     0.06   129260     0.00     0.00  make_file
-  0.29     19.95     0.06    75430     0.00     0.00  read_unbuffered
-
-
-
-mdfour could perhaps be made faster:
-
-/* NOTE: This code makes no attempt to be fast!  */
-
-There might be an optimized version somewhere that we can borrow.

doc/rsync.sgml

@@ -1,351 +0,0 @@
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook V4.1//EN">
-<book id="rsync">
-  <bookinfo>
-    <title>rsync</title>
-    <copyright>
-      <year>1996 -- 2002</year>
-      <holder>Martin Pool</holder>
-      <holder>Andrew Tridgell</holder>
-    </copyright>
-    <author>
-      <firstname>Martin</firstname>
-      <surname>Pool</surname>
-    </author>
-  </bookinfo>
-
-  <chapter>
-    <title>Introduction</title>
-
-    <para>rsync is a flexible program for efficiently copying files or
-      directory trees.
-
-    <para>rsync has many options to select which files will be copied
-      and how they are to be transferred.  It may be used as an
-      alternative to ftp, http, scp or rcp.
-
-    <para>The rsync remote-update protocol allows rsync to transfer just
-      the differences between two sets of files across the network link,
-      using an efficient checksum-search algorithm described in the
-      technical report that accompanies this package.</para>
-
-    <para>Some of the additional features of rsync are:</para>
-
-    <itemizedlist>
-      
-      <listitem>
-	<para>support for copying links, devices, owners, groups and
-	  permissions
-	</para>
-      </listitem>
-      
-      <listitem>
-	<para>
-	  exclude and exclude-from options similar to GNU tar
-	</para>
-      </listitem>
-
-      <listitem>
-	<para>
-	  a CVS exclude mode for ignoring the same files that CVS would ignore
-      </listitem>
-
-      <listitem>
-	<para>
-	  can use any transparent remote shell, including rsh or ssh
-      </listitem>
-
-      <listitem>
-	<para>
-	  does not require root privileges
-      </listitem>
-
-      <listitem>
-	<para>
-	  pipelining of file transfers to minimize latency costs
-      </listitem>
-		
-      <listitem>
-	<para>
-	  support for anonymous or authenticated rsync servers (ideal for
-	  mirroring)
-	</para>
-      </listitem>
-    </itemizedlist>
-  </chapter>
-
-
-
-  <chapter>
-    <title>Using rsync</title>
-    <section>
-      <title>
-	Introductory example
-      </title>
-      
-      <para>
-	Probably the most common case of rsync usage is to copy files
-	to or from a remote machine using
-	<application>ssh</application> as a network transport.  In
-	this situation rsync is a good alternative to
-	<application>scp</application>.
-      </para>
-
-      <para>
-	The most commonly used arguments for rsync are
-      </para>
-
-      <variablelist>
-	<varlistentry>
-	  <term><option>-v</option></term>
-	  <listitem>
-	    <para>Be verbose.  Primarily, display the name of each file as it is copied.</para>
-	  </listitem>
-	</varlistentry>
-
-
-	<varlistentry>
-	  <term><option>-a</option></term>
-	  <listitem>
-	    <para>
-	      Reproduce the structure and attributes of the origin files as exactly
-	      as possible: this includes copying subdirectories, symlinks, special
-	      files, ownership and permissions.  (@xref{Attributes to
-	      copy}.)
-	    </para>
-	  </listitem>
-	</varlistentry>
-      </variablelist>
-
-
-	
-      <para><option>-v </option>
-      
-      <para><option>-z</option>
-	Compress network traffic, using a modified version of the
-	@command{zlib} library.</para>
-      
-      <para><option>-P</option>
-	Display a progress indicator while files are transferred.  This should
-	normally be ommitted if rsync is not run on a terminal.
-      </para>
-    </section>
-
-
-
-
-    <section>
-      <title>Local and remote</title>
-      
-      <para>There are six different ways of using rsync. They
-      are:</para>
-
-      
-
-      <!-- one of (CALLOUTLIST GLOSSLIST ITEMIZEDLIST ORDEREDLIST SEGMENTEDLIST SIMPLELIST VARIABLELIST CAUTION IMPORTANT NOTE TIP WARNING LITERALLAYOUT PROGRAMLISTING PROGRAMLISTINGCO SCREEN SCREENCO SCREENSHOT SYNOPSIS CMDSYNOPSIS FUNCSYNOPSIS CLASSSYNOPSIS FIELDSYNOPSIS CONSTRUCTORSYNOPSIS DESTRUCTORSYNOPSIS METHODSYNOPSIS FORMALPARA PARA SIMPARA ADDRESS BLOCKQUOTE GRAPHIC GRAPHICCO MEDIAOBJECT MEDIAOBJECTCO INFORMALEQUATION INFORMALEXAMPLE INFORMALFIGURE INFORMALTABLE EQUATION EXAMPLE FIGURE TABLE MSGSET PROCEDURE SIDEBAR QANDASET ANCHOR BRIDGEHEAD REMARK HIGHLIGHTS ABSTRACT AUTHORBLURB EPIGRAPH INDEXTERM REFENTRY SECTION) -->
-      <orderedlist>
-	<listitem>
-	  <para>
-	    for copying local files. This is invoked when neither
-	    source nor destination path contains a @code{:} separator
-
-	<listitem>
-	  <para>
-	    for copying from the local machine to a remote machine using
-	    a remote shell program as the transport (such as rsh or
-	    ssh). This is invoked when the destination path contains a
-	    single @code{:} separator.
-
-	<listitem>
-	  <para>
-	    for copying from a remote machine to the local machine
-	    using a remote shell program. This is invoked when the source
-	    contains a @code{:} separator.
-
-	<listitem>
-	  <para>
-	    for copying from a remote rsync server to the local
-	    machine. This is invoked when the source path contains a @code{::}
-	    separator or a @code{rsync://} URL.
-
-	<listitem>
-	  <para>
-	    for copying from the local machine to a remote rsync
-	    server. This is invoked when the destination path contains a @code{::}
-	    separator.
-
-	<listitem>
-	  <para>
-	    for listing files on a remote machine. This is done the
-	    same way as rsync transfers except that you leave off the
-	    local destination.  
-
-	</listitem>
-      </orderedlist>
-	  <para>
-Note that in all cases (other than listing) at least one of the source
-and destination paths must be local.
-
-	  <para>
-Any one invocation of rsync makes a copy in a single direction.  rsync
-currently has no equivalent of @command{ftp}'s interactive mode.
-
-@cindex @sc{nfs}
-@cindex network filesystems
-@cindex remote filesystems
-
-	  <para>
-rsync's network protocol is generally faster at copying files than
-network filesystems such as @sc{nfs} or @sc{cifs}.  It is better to
-run rsync on the file server either as a daemon or over ssh than
-running rsync giving the network directory.
-      </para>
-    </section>
-  </chapter>
-
-
-
-  <chapter>
-    <title>Frequently asked questions</title>
-
-    
-    <!-- one of (CALLOUTLIST GLOSSLIST ITEMIZEDLIST ORDEREDLIST SEGMENTEDLIST SIMPLELIST VARIABLELIST CAUTION IMPORTANT NOTE TIP WARNING LITERALLAYOUT PROGRAMLISTING PROGRAMLISTINGCO SCREEN SCREENCO SCREENSHOT SYNOPSIS CMDSYNOPSIS FUNCSYNOPSIS CLASSSYNOPSIS FIELDSYNOPSIS CONSTRUCTORSYNOPSIS DESTRUCTORSYNOPSIS METHODSYNOPSIS FORMALPARA PARA SIMPARA ADDRESS BLOCKQUOTE GRAPHIC GRAPHICCO MEDIAOBJECT MEDIAOBJECTCO INFORMALEQUATION INFORMALEXAMPLE INFORMALFIGURE INFORMALTABLE EQUATION EXAMPLE FIGURE TABLE MSGSET PROCEDURE SIDEBAR QANDASET ANCHOR BRIDGEHEAD REMARK HIGHLIGHTS ABSTRACT AUTHORBLURB EPIGRAPH INDEXTERM SECTION SIMPLESECT REFENTRY SECT1) -->
-    <qandaset>
-      <!-- one of (QANDADIV QANDAENTRY) -->
-
-      <qandaentry>
-	<question>
-	  <!-- one of (CALLOUTLIST GLOSSLIST ITEMIZEDLIST ORDEREDLIST
-	  SEGMENTEDLIST SIMPLELIST VARIABLELIST CAUTION IMPORTANT NOTE
-	  TIP WARNING LITERALLAYOUT PROGRAMLISTING PROGRAMLISTINGCO
-	  SCREEN SCREENCO SCREENSHOT SYNOPSIS CMDSYNOPSIS FUNCSYNOPSIS
-	  CLASSSYNOPSIS FIELDSYNOPSIS CONSTRUCTORSYNOPSIS
-	  DESTRUCTORSYNOPSIS METHODSYNOPSIS FORMALPARA PARA SIMPARA
-	  ADDRESS BLOCKQUOTE GRAPHIC GRAPHICCO MEDIAOBJECT
-	  MEDIAOBJECTCO INFORMALEQUATION INFORMALEXAMPLE
-	  INFORMALFIGURE INFORMALTABLE EQUATION EXAMPLE FIGURE TABLE
-	  PROCEDURE ANCHOR BRIDGEHEAD REMARK HIGHLIGHTS INDEXTERM) -->
-	  <para>Are there mailing lists for rsync?
-	</question>
-
-	<answer>
-	  <para>Yes, and you can subscribe and unsubscribe through a
-	  web interface at
-	    <ulink
-	      url="http://lists.samba.org/">http://lists.samba.org/</ulink>
-	  </para>
-
-	  <para>
-	    If you are having trouble with the mailing list, please
-	    send mail to the administrator
-	    
-	    <email>rsync-admin@lists.samba.org</email>
-
-	    not to the list itself.
-	  </para>
-
-	  <para>
-	    The mailing list archives are searchable.  Use 
-	    <ulink url="http://google.com/">Google</ulink> and prepend
-	    the search with <userinput>site:lists.samba.org
-	    rsync</userinput>, plus relevant keywords.
-	  </para>
-	</answer>
-      </qandaentry>
-
-
-      <qandaentry>
-	<question>
-	  <para>
-	    Why is rsync so much bigger when I build it with
-	    <command>gcc</command>?
-	  </para>
-	</question>
-	<answer>
-	  <para>
-	    On gcc, rsync builds by default with debug symbols
-	    included.  If you strip both executables, they should end
-	    up about the same size.  (Use <command>make
-	    install-strip</command>.)
-	  </para>
-	</answer>
-      </qandaentry>
-
-      
-      <qandaentry>
-	<question>
-	  <para>Is rsync useful for a single large file like an ISO image?</para>
-	</question>
-	<answer>
-	  <para>
-	    Yes, but note the following:
-
-	  <para>
-   Background: A common use of rsync is to update a file (or set of files) in one location from a more
-   correct or up-to-date copy in another location, taking advantage of portions of the files that are
-   identical to speed up the process. (Note that rsync will transfer a file in its entirety if no copy
-   exists at the destination.)
-
-	  <para>
-   (This discussion is written in terms of updating a local copy of a file from a correct file in a
-   remote location, although rsync can work in either direction.)
-
-	  <para>
-   The file to be updated (the local file) must be in a destination directory that has enough space for
-   two copies of the file. (In addition, keep an extra copy of the file to be updated in a different
-   location for safety -- see the discussion (below) about rsync's behavior when the rsync process is
-   interrupted before completion.)
-
-	  <para>
-   The local file must have the same name as the remote file being sync'd to (I think?). If you are
-   trying to upgrade an iso from, for example, beta1 to beta2, rename the local file to the same name
-   as the beta2 file. *(This is a useful thing to do -- only the changed portions will be
-   transmitted.)*
-
-	  <para>
-   The extra copy of the local file kept in a different location is because of rsync's behavior if
-   interrupted before completion:
-
-	  <para>
-   * If you specify the --partial option and rsync is interrupted, rsync will save the partially
-   rsync'd file and throw away the original local copy. (The partially rsync'd file is correct but
-   truncated.) If rsync is restarted, it will not have a local copy of the file to check for duplicate
-   blocks beyond the section of the file that has already been rsync'd, thus the remainder of the rsync
-   process will be a "pure transfer" of the file rather than taking advantage of the rsync algorithm.
-
-	  <para>
-   * If you don't specify the --partial option and rsync is interrupted, rsync will throw away the
-   partially rsync'd file, and, when rsync is restarted starts the rsync process over from the
-   beginning.
-
-	  <para>
-   Which of these is most desirable depends on the degree of commonality between the local and remote
-   copies of the file *and how much progress was made before the interruption*.
-
-	  <para>
-   The ideal approach after an interruption would be to create a new file by taking the original file
-   and deleting a portion equal in size to the portion already rsync'd and then appending *the
-   remaining* portion to the portion of the file that has already been rsync'd. (There has been some
-   discussion about creating an option to do this automatically.)
-
-   The --compare-dest option is useful when transferring multiple files, but is of no benefit in
-   transferring a single file. (AFAIK)
-
-   *Other potentially useful information can be found at:
-   -[3]http://twiki.org/cgi-bin/view/Wikilearn/RsyncingALargeFile
-
-   This answer, formatted with "real" bullets, can be found at:
-   -[4]http://twiki.org/cgi-bin/view/Wikilearn/RsyncingALargeFileFAQ*
-
-	  </para>
-	</answer>
-      </qandaentry>
-    </qandaset>
-  </chapter>
-
-
-  <appendix>
-    <title>Other Resources</title>
-    
-    <para><ulink url="http://www.ccp14.ac.uk/ccp14admin/rsync/"></ulink></para>
-  </appendix>
-</book>

errcode.h

@@ -2,7 +2,7 @@
  * Error codes returned by rsync.
  *
  * Copyright (C) 1998-2000 Andrew Tridgell
- * Copyright (C) 2003-2007 Wayne Davison
+ * Copyright (C) 2003-2019 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -45,6 +45,7 @@
 #define RERR_DEL_LIMIT  25      /* skipped some deletes due to --max-delete */
 
 #define RERR_TIMEOUT    30      /* timeout in data send/receive */
+#define RERR_CONTIMEOUT 35      /* timeout waiting for daemon connection */
 
 /* Although it doesn't seem to be specified anywhere,
  * ssh and the shell seem to return these values:

fileio.c

@@ -3,7 +3,7 @@
  *
  * Copyright (C) 1998 Andrew Tridgell
  * Copyright (C) 2002 Martin Pool
- * Copyright (C) 2004-2007 Wayne Davison
+ * Copyright (C) 2004-2023 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,68 +20,108 @@
  */
 
 #include "rsync.h"
+#include "inums.h"
 
 #ifndef ENODATA
 #define ENODATA EAGAIN
 #endif
 
+/* We want all reads to be aligned on 1K boundaries. */
+#define ALIGN_BOUNDARY 1024
+/* How far past the boundary is an offset? */
+#define ALIGNED_OVERSHOOT(oft) ((oft) & (ALIGN_BOUNDARY-1))
+/* Round up a length to the next boundary */
+#define ALIGNED_LENGTH(len) ((((len) - 1) | (ALIGN_BOUNDARY-1)) + 1)
+
 extern int sparse_files;
 
-static char last_byte;
-static size_t sparse_seek = 0;
+OFF_T preallocated_len = 0;
 
-int sparse_end(int f)
+static OFF_T sparse_seek = 0;
+static OFF_T sparse_past_write = 0;
+
+int sparse_end(int f, OFF_T size, int updating_basis_or_equiv)
 {
-	int ret;
+	int ret = 0;
 
-	if (!sparse_seek)
-		return 0;
+	if (updating_basis_or_equiv) {
+		if (sparse_seek && do_punch_hole(f, sparse_past_write, sparse_seek) < 0)
+			ret = -1;
+#ifdef HAVE_FTRUNCATE /* A compilation formality -- in-place requires ftruncate() */
+		else /* Just in case the original file was longer */
+			ret = do_ftruncate(f, size);
+#endif
+	} else if (sparse_seek) {
+#ifdef HAVE_FTRUNCATE
+		ret = do_ftruncate(f, size);
+#else
+		if (do_lseek(f, sparse_seek-1, SEEK_CUR) != size-1)
+			ret = -1;
+		else {
+			do {
+				ret = write(f, "", 1);
+			} while (ret < 0 && errno == EINTR);
 
-	do_lseek(f, sparse_seek-1, SEEK_CUR);
-	sparse_seek = 0;
+			ret = ret <= 0 ? -1 : 0;
+		}
+#endif
+	}
 
-	do {
-		ret = write(f, "", 1);
-	} while (ret < 0 && errno == EINTR);
+	sparse_past_write = sparse_seek = 0;
 
-	return ret <= 0 ? -1 : 0;
+	return ret;
 }
 
-
-static int write_sparse(int f, char *buf, size_t len)
+/* Note that the offset is just the caller letting us know where
+ * the current file position is in the file. The use_seek arg tells
+ * us that we should seek over matching data instead of writing it. */
+static int write_sparse(int f, int use_seek, OFF_T offset, const char *buf, int len)
 {
-	size_t l1 = 0, l2 = 0;
+	int l1 = 0, l2 = 0;
 	int ret;
 
 	for (l1 = 0; l1 < len && buf[l1] == 0; l1++) {}
 	for (l2 = 0; l2 < len-l1 && buf[len-(l2+1)] == 0; l2++) {}
 
-	/* XXX Riddle me this: why does this function SLOW DOWN when I
-	 * remove the following (unneeded) line?? Core Duo weirdness? */
-	last_byte = buf[len-1];
-
 	sparse_seek += l1;
 
 	if (l1 == len)
 		return len;
 
-	if (sparse_seek)
-		do_lseek(f, sparse_seek, SEEK_CUR);
+	if (sparse_seek) {
+		if (sparse_past_write >= preallocated_len) {
+			if (do_lseek(f, sparse_seek, SEEK_CUR) < 0)
+				return -1;
+		} else if (do_punch_hole(f, sparse_past_write, sparse_seek) < 0) {
+			sparse_seek = 0;
+			return -1;
+		}
+	}
 	sparse_seek = l2;
+	sparse_past_write = offset + len - l2;
+
+	if (use_seek) {
+		/* The in-place data already matches. */
+		if (do_lseek(f, len - (l1+l2), SEEK_CUR) < 0)
+			return -1;
+		return len;
+	}
 
 	while ((ret = write(f, buf + l1, len - (l1+l2))) <= 0) {
 		if (ret < 0 && errno == EINTR)
 			continue;
+		sparse_seek = 0;
 		return ret;
 	}
 
-	if (ret != (int)(len - (l1+l2)))
+	if (ret != (int)(len - (l1+l2))) {
+		sparse_seek = 0;
 		return l1+ret;
+	}
 
 	return len;
 }
 
-
 static char *wf_writeBuf;
 static size_t wf_writeBufSize;
 static size_t wf_writeBufCnt;
@@ -103,12 +143,10 @@ int flush_write_file(int f)
 	return ret;
 }
 
-
-/*
- * write_file does not allow incomplete writes.  It loops internally
- * until len bytes are written or errno is set.
- */
-int write_file(int f,char *buf,size_t len)
+/* write_file does not allow incomplete writes.  It loops internally
+ * until len bytes are written or errno is set.  Note that use_seek and
+ * offset are only used in sparse processing (see write_sparse()). */
+int write_file(int f, int use_seek, OFF_T offset, const char *buf, int len)
 {
 	int ret = 0;
 
@@ -116,16 +154,15 @@ int write_file(int f,char *buf,size_t len)
 		int r1;
 		if (sparse_files > 0) {
 			int len1 = MIN(len, SPARSE_WRITE_SIZE);
-			r1 = write_sparse(f, buf, len1);
+			r1 = write_sparse(f, use_seek, offset, buf, len1);
+			offset += r1;
 		} else {
 			if (!wf_writeBuf) {
 				wf_writeBufSize = WRITE_SIZE * 8;
 				wf_writeBufCnt  = 0;
 				wf_writeBuf = new_array(char, wf_writeBufSize);
-				if (!wf_writeBuf)
-					out_of_memory("write_file");
 			}
-			r1 = MIN(len, wf_writeBufSize - wf_writeBufCnt);
+			r1 = (int)MIN((size_t)len, wf_writeBufSize - wf_writeBufCnt);
 			if (r1) {
 				memcpy(wf_writeBuf + wf_writeBufCnt, buf, r1);
 				wf_writeBufCnt += r1;
@@ -149,25 +186,47 @@ int write_file(int f,char *buf,size_t len)
 	return ret;
 }
 
+/* An in-place update found identical data at an identical location. We either
+ * just seek past it, or (for an in-place sparse update), we give the data to
+ * the sparse processor with the use_seek flag set. */
+int skip_matched(int fd, OFF_T offset, const char *buf, int len)
+{
+	OFF_T pos;
+
+	if (sparse_files > 0) {
+		if (write_file(fd, 1, offset, buf, len) != len)
+			return -1;
+		return 0;
+	}
+
+	if (flush_write_file(fd) < 0)
+		return -1;
+
+	if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset + len) {
+		rsyserr(FERROR_XFER, errno, "lseek returned %s, not %s",
+			big_num(pos), big_num(offset));
+		return -1;
+	}
+
+	return 0;
+}
 
 /* This provides functionality somewhat similar to mmap() but using read().
  * It gives sliding window access to a file.  mmap() is not used because of
  * the possibility of another program (such as a mailer) truncating the
  * file thus giving us a SIGBUS. */
-struct map_struct *map_file(int fd, OFF_T len, int32 read_size,
-			    int32 blk_size)
+struct map_struct *map_file(int fd, OFF_T len, int32 read_size, int32 blk_size)
 {
 	struct map_struct *map;
 
-	if (!(map = new0(struct map_struct)))
-		out_of_memory("map_file");
+	map = new0(struct map_struct);
 
 	if (blk_size && (read_size % blk_size))
 		read_size += blk_size - (read_size % blk_size);
 
 	map->fd = fd;
 	map->file_size = len;
-	map->def_window_size = read_size;
+	map->def_window_size = ALIGNED_LENGTH(read_size);
 
 	return map;
 }
@@ -176,9 +235,8 @@ struct map_struct *map_file(int fd, OFF_T len, int32 read_size,
 /* slide the read window in the file */
 char *map_ptr(struct map_struct *map, OFF_T offset, int32 len)
 {
-	int32 nread;
 	OFF_T window_start, read_start;
-	int32 window_size, read_size, read_offset;
+	int32 window_size, read_size, read_offset, align_fudge;
 
 	if (len == 0)
 		return NULL;
@@ -193,26 +251,23 @@ char *map_ptr(struct map_struct *map, OFF_T offset, int32 len)
 		return map->p + (offset - map->p_offset);
 
 	/* nope, we are going to have to do a read. Work out our desired window */
-	window_start = offset;
+	align_fudge = (int32)ALIGNED_OVERSHOOT(offset);
+	window_start = offset - align_fudge;
 	window_size = map->def_window_size;
 	if (window_start + window_size > map->file_size)
 		window_size = (int32)(map->file_size - window_start);
-	if (len > window_size)
-		window_size = len;
+	if (window_size < len + align_fudge)
+		window_size = ALIGNED_LENGTH(len + align_fudge);
 
 	/* make sure we have allocated enough memory for the window */
 	if (window_size > map->p_size) {
 		map->p = realloc_array(map->p, char, window_size);
-		if (!map->p)
-			out_of_memory("map_ptr");
 		map->p_size = window_size;
 	}
 
-	/* Now try to avoid re-reading any bytes by reusing any bytes
-	 * from the previous buffer. */
-	if (window_start >= map->p_offset &&
-	    window_start < map->p_offset + map->p_len &&
-	    window_start + window_size >= map->p_offset + map->p_len) {
+	/* Now try to avoid re-reading any bytes by reusing any bytes from the previous buffer. */
+	if (window_start >= map->p_offset && window_start < map->p_offset + map->p_len
+	 && window_start + window_size >= map->p_offset + map->p_len) {
 		read_start = map->p_offset + map->p_len;
 		read_offset = (int32)(read_start - window_start);
 		read_size = window_size - read_offset;
@@ -232,8 +287,8 @@ char *map_ptr(struct map_struct *map, OFF_T offset, int32 len)
 	if (map->p_fd_offset != read_start) {
 		OFF_T ret = do_lseek(map->fd, read_start, SEEK_SET);
 		if (ret != read_start) {
-			rsyserr(FERROR, errno, "lseek returned %.0f, not %.0f",
-				(double)ret, (double)read_start);
+			rsyserr(FERROR, errno, "lseek returned %s, not %s",
+				big_num(ret), big_num(read_start));
 			exit_cleanup(RERR_FILEIO);
 		}
 		map->p_fd_offset = read_start;
@@ -242,7 +297,7 @@ char *map_ptr(struct map_struct *map, OFF_T offset, int32 len)
 	map->p_len = window_size;
 
 	while (read_size > 0) {
-		nread = read(map->fd, map->p + read_offset, read_size);
+		int32 nread = read(map->fd, map->p + read_offset, read_size);
 		if (nread <= 0) {
 			if (!map->status)
 				map->status = nread ? errno : ENODATA;
@@ -256,10 +311,9 @@ char *map_ptr(struct map_struct *map, OFF_T offset, int32 len)
 		read_size -= nread;
 	}
 
-	return map->p;
+	return map->p + align_fudge;
 }
 
-
 int unmap_file(struct map_struct *map)
 {
 	int	ret;
@@ -269,7 +323,9 @@ int unmap_file(struct map_struct *map)
 		map->p = NULL;
 	}
 	ret = map->status;
-	memset(map, 0, sizeof map[0]);
+#if 0 /* I don't think we really need this. */
+	force_memzero(map, sizeof map[0]);
+#endif
 	free(map);
 
 	return ret;

getfsdev.c

@@ -15,8 +15,7 @@
 			fprintf(stderr, "Unable to stat `%s'\n", *argv);
 			exit(1);
 		}
-		printf("%ld/%ld\n", (long)major(st.st_dev),
-				    (long)minor(st.st_dev));
+		printf("%ld/%ld\n", (long)major(st.st_dev), (long)minor(st.st_dev));
 	}
 
 	return 0;

getgroups.c

@@ -3,7 +3,7 @@
  * `id -G` on Linux, but it's too hard to find a portable equivalent.
  *
  * Copyright (C) 2002 Martin Pool
- * Copyright (C) 2003-2007 Wayne Davison
+ * Copyright (C) 2003-2020 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
@@ -20,8 +20,7 @@
 
 #include "rsync.h"
 
-int
-main(UNUSED(int argc), UNUSED(char *argv[]))
+ int main(UNUSED(int argc), UNUSED(char *argv[]))
 {
 	int n, i;
 	gid_t *list;

hashtable.c

@@ -1,7 +1,7 @@
 /*
  * Routines to provide a memory-efficient hashtable.
  *
- * Copyright (C) 2007 Wayne Davison
+ * Copyright (C) 2007-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -23,59 +23,96 @@
 
 struct hashtable *hashtable_create(int size, int key64)
 {
+	int req = size;
 	struct hashtable *tbl;
-	int node_size = key64 ? sizeof (struct ht_int64_node )
+	int node_size = key64 ? sizeof (struct ht_int64_node)
 			      : sizeof (struct ht_int32_node);
 
 	/* Pick a power of 2 that can hold the requested size. */
 	if (size & (size-1) || size < 16) {
-		int req = size;
 		size = 16;
 		while (size < req)
 			size *= 2;
 	}
 
-	if (!(tbl = new(struct hashtable))
-	 || !(tbl->nodes = new_array0(char, size * node_size)))
-		out_of_memory("hashtable_create");
+	tbl = new(struct hashtable);
+	tbl->nodes = new_array0(char, size * node_size);
 	tbl->size = size;
 	tbl->entries = 0;
 	tbl->node_size = node_size;
+	tbl->key64 = key64 ? 1 : 0;
+
+	if (DEBUG_GTE(HASH, 1)) {
+		char buf[32];
+		if (req != size)
+			snprintf(buf, sizeof buf, "req: %d, ", req);
+		else
+			*buf = '\0';
+		rprintf(FINFO, "[%s] created hashtable %lx (%ssize: %d, keys: %d-bit)\n",
+			who_am_i(), (long)tbl, buf, size, key64 ? 64 : 32);
+	}
 
 	return tbl;
 }
 
 void hashtable_destroy(struct hashtable *tbl)
 {
+	if (DEBUG_GTE(HASH, 1)) {
+		rprintf(FINFO, "[%s] destroyed hashtable %lx (size: %d, keys: %d-bit)\n",
+			who_am_i(), (long)tbl, tbl->size, tbl->key64 ? 64 : 32);
+	}
 	free(tbl->nodes);
 	free(tbl);
 }
 
-/* This returns the node for the indicated key, either newly created or
- * already existing.  Returns NULL if not allocating and not found. */
-void *hashtable_find(struct hashtable *tbl, int64 key, int allocate_if_missing)
+/* Returns the node that holds the indicated key if it exists. When it does not
+ * exist, it returns either NULL (when data_when_new is NULL), or it returns a
+ * new node with its node->data set to the indicated value.
+ *
+ * If your code doesn't know the data value for a new node in advance (usually
+ * because it doesn't know if a node is new or not) you should pass in a unique
+ * (non-0) value that you can use to check if the returned node is new. You can
+ * then overwrite the data with any value you want (even 0) since it only needs
+ * to be different than whatever data_when_new value you use later on.
+ *
+ * This return is a void* just because it might be pointing at a ht_int32_node
+ * or a ht_int64_node, and that makes the caller's assignment a little easier. */
+void *hashtable_find(struct hashtable *tbl, int64 key, void *data_when_new)
 {
-	int key64 = (tbl->node_size > sizeof (struct ht_int32_node));
+	int key64 = tbl->key64;
 	struct ht_int32_node *node;
 	uint32 ndx;
 
-	if (allocate_if_missing && tbl->entries > HASH_LOAD_LIMIT(tbl->size)) {
+	if (key64 ? key == 0 : (int32)key == 0) {
+		rprintf(FERROR, "Internal hashtable error: illegal key supplied!\n");
+		exit_cleanup(RERR_MESSAGEIO);
+	}
+
+	if (data_when_new && tbl->entries > HASH_LOAD_LIMIT(tbl->size)) {
 		void *old_nodes = tbl->nodes;
 		int size = tbl->size * 2;
 		int i;
 
-		if (!(tbl->nodes = new_array0(char, size * tbl->node_size)))
-			out_of_memory("hashtable_node");
+		tbl->nodes = new_array0(char, size * tbl->node_size);
 		tbl->size = size;
 		tbl->entries = 0;
 
+		if (DEBUG_GTE(HASH, 1)) {
+			rprintf(FINFO, "[%s] growing hashtable %lx (size: %d, keys: %d-bit)\n",
+				who_am_i(), (long)tbl, size, key64 ? 64 : 32);
+		}
+
 		for (i = size / 2; i-- > 0; ) {
 			struct ht_int32_node *move_node = HT_NODE(tbl, old_nodes, i);
 			int64 move_key = HT_KEY(move_node, key64);
 			if (move_key == 0)
 				continue;
-			node = hashtable_find(tbl, move_key, 1);
-			node->data = move_node->data;
+			if (move_node->data)
+				hashtable_find(tbl, move_key, move_node->data);
+			else {
+				node = hashtable_find(tbl, move_key, "");
+				node->data = 0;
+			}
 		}
 
 		free(old_nodes);
@@ -86,7 +123,7 @@ void *hashtable_find(struct hashtable *tbl, int64 key, int allocate_if_missing)
 		uchar buf[4], *keyp = buf;
 		int i;
 
-		SIVAL(buf, 0, key);
+		SIVALu(buf, 0, key);
 		for (ndx = 0, i = 0; i < 4; i++) {
 			ndx += keyp[i];
 			ndx += (ndx << 10);
@@ -103,7 +140,9 @@ void *hashtable_find(struct hashtable *tbl, int64 key, int allocate_if_missing)
 		a = b = c = 0xdeadbeef + (8 << 2);
 
 #define rot(x,k) (((x)<<(k)) ^ ((x)>>(32-(k))))
+#if SIZEOF_INT64 >= 8
 		b += (uint32)(key >> 32);
+#endif
 		a += (uint32)key;
 		c ^= b; c -= rot(b, 14);
 		a ^= c; a -= rot(c, 11);
@@ -128,7 +167,7 @@ void *hashtable_find(struct hashtable *tbl, int64 key, int allocate_if_missing)
 		if (nkey == key)
 			return node;
 		if (nkey == 0) {
-			if (!allocate_if_missing)
+			if (!data_when_new)
 				return NULL;
 			break;
 		}
@@ -139,7 +178,485 @@ void *hashtable_find(struct hashtable *tbl, int64 key, int allocate_if_missing)
 	if (key64)
 		((struct ht_int64_node*)node)->key = key;
 	else
-		node->key = key;
+		node->key = (int32)key;
+	node->data = data_when_new;
 	tbl->entries++;
 	return node;
 }
+
+#ifndef WORDS_BIGENDIAN
+# define HASH_LITTLE_ENDIAN 1
+# define HASH_BIG_ENDIAN 0
+#else
+# define HASH_LITTLE_ENDIAN 0
+# define HASH_BIG_ENDIAN 1
+#endif
+
+/*
+ -------------------------------------------------------------------------------
+ lookup3.c, by Bob Jenkins, May 2006, Public Domain.
+
+ These are functions for producing 32-bit hashes for hash table lookup.
+ hash_word(), hashlittle(), hashlittle2(), hashbig(), mix(), and final()
+ are externally useful functions.  Routines to test the hash are included
+ if SELF_TEST is defined.  You can use this free for any purpose.  It's in
+ the public domain.  It has no warranty.
+
+ You probably want to use hashlittle().  hashlittle() and hashbig()
+ hash byte arrays.  hashlittle() is is faster than hashbig() on
+ little-endian machines.  Intel and AMD are little-endian machines.
+ On second thought, you probably want hashlittle2(), which is identical to
+ hashlittle() except it returns two 32-bit hashes for the price of one.
+ You could implement hashbig2() if you wanted but I haven't bothered here.
+
+ If you want to find a hash of, say, exactly 7 integers, do
+   a = i1;  b = i2;  c = i3;
+   mix(a,b,c);
+   a += i4; b += i5; c += i6;
+   mix(a,b,c);
+   a += i7;
+   final(a,b,c);
+ then use c as the hash value.  If you have a variable length array of
+ 4-byte integers to hash, use hash_word().  If you have a byte array (like
+ a character string), use hashlittle().  If you have several byte arrays, or
+ a mix of things, see the comments above hashlittle().
+
+ Why is this so big?  I read 12 bytes at a time into 3 4-byte integers,
+ then mix those integers.  This is fast (you can do a lot more thorough
+ mixing with 12*3 instructions on 3 integers than you can with 3 instructions
+ on 1 byte), but shoehorning those bytes into integers efficiently is messy.
+*/
+
+#define hashsize(n) ((uint32_t)1<<(n))
+#define hashmask(n) (hashsize(n)-1)
+#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
+
+/*
+ -------------------------------------------------------------------------------
+ mix -- mix 3 32-bit values reversibly.
+
+ This is reversible, so any information in (a,b,c) before mix() is
+ still in (a,b,c) after mix().
+
+ If four pairs of (a,b,c) inputs are run through mix(), or through
+ mix() in reverse, there are at least 32 bits of the output that
+ are sometimes the same for one pair and different for another pair.
+ This was tested for:
+ * pairs that differed by one bit, by two bits, in any combination
+   of top bits of (a,b,c), or in any combination of bottom bits of
+   (a,b,c).
+ * "differ" is defined as +, -, ^, or ~^.  For + and -, I transformed
+   the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
+   is commonly produced by subtraction) look like a single 1-bit
+   difference.
+ * the base values were pseudorandom, all zero but one bit set, or
+   all zero plus a counter that starts at zero.
+
+ Some k values for my "a-=c; a^=rot(c,k); c+=b;" arrangement that
+ satisfy this are
+     4  6  8 16 19  4
+     9 15  3 18 27 15
+    14  9  3  7 17  3
+ Well, "9 15 3 18 27 15" didn't quite get 32 bits diffing
+ for "differ" defined as + with a one-bit base and a two-bit delta.  I
+ used http://burtleburtle.net/bob/hash/avalanche.html to choose
+ the operations, constants, and arrangements of the variables.
+
+ This does not achieve avalanche.  There are input bits of (a,b,c)
+ that fail to affect some output bits of (a,b,c), especially of a.  The
+ most thoroughly mixed value is c, but it doesn't really even achieve
+ avalanche in c.
+
+ This allows some parallelism.  Read-after-writes are good at doubling
+ the number of bits affected, so the goal of mixing pulls in the opposite
+ direction as the goal of parallelism.  I did what I could.  Rotates
+ seem to cost as much as shifts on every machine I could lay my hands
+ on, and rotates are much kinder to the top and bottom bits, so I used
+ rotates.
+ -------------------------------------------------------------------------------
+*/
+#define mix(a,b,c) \
+{ \
+  a -= c;  a ^= rot(c, 4);  c += b; \
+  b -= a;  b ^= rot(a, 6);  a += c; \
+  c -= b;  c ^= rot(b, 8);  b += a; \
+  a -= c;  a ^= rot(c,16);  c += b; \
+  b -= a;  b ^= rot(a,19);  a += c; \
+  c -= b;  c ^= rot(b, 4);  b += a; \
+}
+
+/*
+ -------------------------------------------------------------------------------
+ final -- final mixing of 3 32-bit values (a,b,c) into c
+
+ Pairs of (a,b,c) values differing in only a few bits will usually
+ produce values of c that look totally different.  This was tested for
+ * pairs that differed by one bit, by two bits, in any combination
+   of top bits of (a,b,c), or in any combination of bottom bits of
+   (a,b,c).
+ * "differ" is defined as +, -, ^, or ~^.  For + and -, I transformed
+   the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
+   is commonly produced by subtraction) look like a single 1-bit
+   difference.
+ * the base values were pseudorandom, all zero but one bit set, or
+   all zero plus a counter that starts at zero.
+
+ These constants passed:
+  14 11 25 16 4 14 24
+  12 14 25 16 4 14 24
+ and these came close:
+   4  8 15 26 3 22 24
+  10  8 15 26 3 22 24
+  11  8 15 26 3 22 24
+ -------------------------------------------------------------------------------
+*/
+#define final(a,b,c) \
+{ \
+  c ^= b; c -= rot(b,14); \
+  a ^= c; a -= rot(c,11); \
+  b ^= a; b -= rot(a,25); \
+  c ^= b; c -= rot(b,16); \
+  a ^= c; a -= rot(c,4);  \
+  b ^= a; b -= rot(a,14); \
+  c ^= b; c -= rot(b,24); \
+}
+
+
+/*
+ -------------------------------------------------------------------------------
+ hashlittle() -- hash a variable-length key into a 32-bit value
+   k       : the key (the unaligned variable-length array of bytes)
+   length  : the length of the key, counting by bytes
+   val2    : IN: can be any 4-byte value OUT: second 32 bit hash.
+ Returns a 32-bit value.  Every bit of the key affects every bit of
+ the return value.  Two keys differing by one or two bits will have
+ totally different hash values.  Note that the return value is better
+ mixed than val2, so use that first.
+
+ The best hash table sizes are powers of 2.  There is no need to do
+ mod a prime (mod is sooo slow!).  If you need less than 32 bits,
+ use a bitmask.  For example, if you need only 10 bits, do
+   h = (h & hashmask(10));
+ In which case, the hash table should have hashsize(10) elements.
+
+ If you are hashing n strings (uint8_t **)k, do it like this:
+   for (i=0, h=0; i<n; ++i) h = hashlittle( k[i], len[i], h);
+
+ By Bob Jenkins, 2006.  bob_jenkins@burtleburtle.net.  You may use this
+ code any way you wish, private, educational, or commercial.  It's free.
+
+ Use for hash table lookup, or anything where one collision in 2^^32 is
+ acceptable.  Do NOT use for cryptographic purposes.
+ -------------------------------------------------------------------------------
+*/
+
+#define NON_ZERO_32(x) ((x) ? (x) : (uint32_t)1)
+#define NON_ZERO_64(x, y) ((x) || (y) ? (y) | (int64)(x) << 32 | (y) : (int64)1)
+
+uint32_t hashlittle(const void *key, size_t length)
+{
+  uint32_t a,b,c;                                          /* internal state */
+  union { const void *ptr; size_t i; } u;     /* needed for Mac Powerbook G4 */
+
+  /* Set up the internal state */
+  a = b = c = 0xdeadbeef + ((uint32_t)length);
+
+  u.ptr = key;
+  if (HASH_LITTLE_ENDIAN && ((u.i & 0x3) == 0)) {
+    const uint32_t *k = (const uint32_t *)key;         /* read 32-bit chunks */
+    const uint8_t  *k8;
+
+    /*------ all but last block: aligned reads and affect 32 bits of (a,b,c) */
+    while (length > 12)
+    {
+      a += k[0];
+      b += k[1];
+      c += k[2];
+      mix(a,b,c);
+      length -= 12;
+      k += 3;
+    }
+
+    /*----------------------------- handle the last (probably partial) block */
+    k8 = (const uint8_t *)k;
+    switch(length)
+    {
+    case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
+    case 11: c+=((uint32_t)k8[10])<<16;  /* fall through */
+    case 10: c+=((uint32_t)k8[9])<<8;    /* fall through */
+    case 9 : c+=k8[8];                   /* fall through */
+    case 8 : b+=k[1]; a+=k[0]; break;
+    case 7 : b+=((uint32_t)k8[6])<<16;   /* fall through */
+    case 6 : b+=((uint32_t)k8[5])<<8;    /* fall through */
+    case 5 : b+=k8[4];                   /* fall through */
+    case 4 : a+=k[0]; break;
+    case 3 : a+=((uint32_t)k8[2])<<16;   /* fall through */
+    case 2 : a+=((uint32_t)k8[1])<<8;    /* fall through */
+    case 1 : a+=k8[0]; break;
+    case 0 : return NON_ZERO_32(c);
+    }
+  } else if (HASH_LITTLE_ENDIAN && ((u.i & 0x1) == 0)) {
+    const uint16_t *k = (const uint16_t *)key;         /* read 16-bit chunks */
+    const uint8_t  *k8;
+
+    /*--------------- all but last block: aligned reads and different mixing */
+    while (length > 12)
+    {
+      a += k[0] + (((uint32_t)k[1])<<16);
+      b += k[2] + (((uint32_t)k[3])<<16);
+      c += k[4] + (((uint32_t)k[5])<<16);
+      mix(a,b,c);
+      length -= 12;
+      k += 6;
+    }
+
+    /*----------------------------- handle the last (probably partial) block */
+    k8 = (const uint8_t *)k;
+    switch(length)
+    {
+    case 12: c+=k[4]+(((uint32_t)k[5])<<16);
+             b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 11: c+=((uint32_t)k8[10])<<16;     /* fall through */
+    case 10: c+=k[4];
+             b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 9 : c+=k8[8];                      /* fall through */
+    case 8 : b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 7 : b+=((uint32_t)k8[6])<<16;      /* fall through */
+    case 6 : b+=k[2];
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 5 : b+=k8[4];                      /* fall through */
+    case 4 : a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 3 : a+=((uint32_t)k8[2])<<16;      /* fall through */
+    case 2 : a+=k[0];
+             break;
+    case 1 : a+=k8[0];
+             break;
+    case 0 : return NON_ZERO_32(c);         /* zero length requires no mixing */
+    }
+
+  } else {                        /* need to read the key one byte at a time */
+    const uint8_t *k = (const uint8_t *)key;
+
+    /*--------------- all but the last block: affect some 32 bits of (a,b,c) */
+    while (length > 12)
+    {
+      a += k[0];
+      a += ((uint32_t)k[1])<<8;
+      a += ((uint32_t)k[2])<<16;
+      a += ((uint32_t)k[3])<<24;
+      b += k[4];
+      b += ((uint32_t)k[5])<<8;
+      b += ((uint32_t)k[6])<<16;
+      b += ((uint32_t)k[7])<<24;
+      c += k[8];
+      c += ((uint32_t)k[9])<<8;
+      c += ((uint32_t)k[10])<<16;
+      c += ((uint32_t)k[11])<<24;
+      mix(a,b,c);
+      length -= 12;
+      k += 12;
+    }
+
+    /*-------------------------------- last block: affect all 32 bits of (c) */
+    switch(length)                   /* all the case statements fall through */
+    {
+    case 12: c+=((uint32_t)k[11])<<24;
+	     /* FALLTHROUGH */
+    case 11: c+=((uint32_t)k[10])<<16;
+	     /* FALLTHROUGH */
+    case 10: c+=((uint32_t)k[9])<<8;
+	     /* FALLTHROUGH */
+    case 9 : c+=k[8];
+	     /* FALLTHROUGH */
+    case 8 : b+=((uint32_t)k[7])<<24;
+	     /* FALLTHROUGH */
+    case 7 : b+=((uint32_t)k[6])<<16;
+	     /* FALLTHROUGH */
+    case 6 : b+=((uint32_t)k[5])<<8;
+	     /* FALLTHROUGH */
+    case 5 : b+=k[4];
+	     /* FALLTHROUGH */
+    case 4 : a+=((uint32_t)k[3])<<24;
+	     /* FALLTHROUGH */
+    case 3 : a+=((uint32_t)k[2])<<16;
+	     /* FALLTHROUGH */
+    case 2 : a+=((uint32_t)k[1])<<8;
+	     /* FALLTHROUGH */
+    case 1 : a+=k[0];
+             break;
+    case 0 : return NON_ZERO_32(c);
+    }
+  }
+
+  final(a,b,c);
+  return NON_ZERO_32(c);
+}
+
+#if SIZEOF_INT64 >= 8
+/*
+ * hashlittle2: return 2 32-bit hash values joined into an int64.
+ *
+ * This is identical to hashlittle(), except it returns two 32-bit hash
+ * values instead of just one.  This is good enough for hash table
+ * lookup with 2^^64 buckets, or if you want a second hash if you're not
+ * happy with the first, or if you want a probably-unique 64-bit ID for
+ * the key.  *pc is better mixed than *pb, so use *pc first.  If you want
+ * a 64-bit value do something like "*pc + (((uint64_t)*pb)<<32)".
+ */
+int64 hashlittle2(const void *key, size_t length)
+{
+  uint32_t a,b,c;                                          /* internal state */
+  union { const void *ptr; size_t i; } u;     /* needed for Mac Powerbook G4 */
+
+  /* Set up the internal state */
+  a = b = c = 0xdeadbeef + ((uint32_t)length);
+
+  u.ptr = key;
+  if (HASH_LITTLE_ENDIAN && ((u.i & 0x3) == 0)) {
+    const uint32_t *k = (const uint32_t *)key;         /* read 32-bit chunks */
+    const uint8_t  *k8;
+
+    /*------ all but last block: aligned reads and affect 32 bits of (a,b,c) */
+    while (length > 12)
+    {
+      a += k[0];
+      b += k[1];
+      c += k[2];
+      mix(a,b,c);
+      length -= 12;
+      k += 3;
+    }
+
+    /*----------------------------- handle the last (probably partial) block */
+    k8 = (const uint8_t *)k;
+    switch(length)
+    {
+    case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
+    case 11: c+=((uint32_t)k8[10])<<16;  /* fall through */
+    case 10: c+=((uint32_t)k8[9])<<8;    /* fall through */
+    case 9 : c+=k8[8];                   /* fall through */
+    case 8 : b+=k[1]; a+=k[0]; break;
+    case 7 : b+=((uint32_t)k8[6])<<16;   /* fall through */
+    case 6 : b+=((uint32_t)k8[5])<<8;    /* fall through */
+    case 5 : b+=k8[4];                   /* fall through */
+    case 4 : a+=k[0]; break;
+    case 3 : a+=((uint32_t)k8[2])<<16;   /* fall through */
+    case 2 : a+=((uint32_t)k8[1])<<8;    /* fall through */
+    case 1 : a+=k8[0]; break;
+    case 0 : return NON_ZERO_64(b, c);
+    }
+  } else if (HASH_LITTLE_ENDIAN && ((u.i & 0x1) == 0)) {
+    const uint16_t *k = (const uint16_t *)key;         /* read 16-bit chunks */
+    const uint8_t  *k8;
+
+    /*--------------- all but last block: aligned reads and different mixing */
+    while (length > 12)
+    {
+      a += k[0] + (((uint32_t)k[1])<<16);
+      b += k[2] + (((uint32_t)k[3])<<16);
+      c += k[4] + (((uint32_t)k[5])<<16);
+      mix(a,b,c);
+      length -= 12;
+      k += 6;
+    }
+
+    /*----------------------------- handle the last (probably partial) block */
+    k8 = (const uint8_t *)k;
+    switch(length)
+    {
+    case 12: c+=k[4]+(((uint32_t)k[5])<<16);
+             b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 11: c+=((uint32_t)k8[10])<<16;     /* fall through */
+    case 10: c+=k[4];
+             b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 9 : c+=k8[8];                      /* fall through */
+    case 8 : b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 7 : b+=((uint32_t)k8[6])<<16;      /* fall through */
+    case 6 : b+=k[2];
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 5 : b+=k8[4];                      /* fall through */
+    case 4 : a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 3 : a+=((uint32_t)k8[2])<<16;      /* fall through */
+    case 2 : a+=k[0];
+             break;
+    case 1 : a+=k8[0];
+             break;
+    case 0 : return NON_ZERO_64(b, c);  /* zero length strings require no mixing */
+    }
+
+  } else {                        /* need to read the key one byte at a time */
+    const uint8_t *k = (const uint8_t *)key;
+
+    /*--------------- all but the last block: affect some 32 bits of (a,b,c) */
+    while (length > 12)
+    {
+      a += k[0];
+      a += ((uint32_t)k[1])<<8;
+      a += ((uint32_t)k[2])<<16;
+      a += ((uint32_t)k[3])<<24;
+      b += k[4];
+      b += ((uint32_t)k[5])<<8;
+      b += ((uint32_t)k[6])<<16;
+      b += ((uint32_t)k[7])<<24;
+      c += k[8];
+      c += ((uint32_t)k[9])<<8;
+      c += ((uint32_t)k[10])<<16;
+      c += ((uint32_t)k[11])<<24;
+      mix(a,b,c);
+      length -= 12;
+      k += 12;
+    }
+
+    /*-------------------------------- last block: affect all 32 bits of (c) */
+    switch(length)                   /* all the case statements fall through */
+    {
+    case 12: c+=((uint32_t)k[11])<<24;
+	     /* FALLTHROUGH */
+    case 11: c+=((uint32_t)k[10])<<16;
+	     /* FALLTHROUGH */
+    case 10: c+=((uint32_t)k[9])<<8;
+	     /* FALLTHROUGH */
+    case 9 : c+=k[8];
+	     /* FALLTHROUGH */
+    case 8 : b+=((uint32_t)k[7])<<24;
+	     /* FALLTHROUGH */
+    case 7 : b+=((uint32_t)k[6])<<16;
+	     /* FALLTHROUGH */
+    case 6 : b+=((uint32_t)k[5])<<8;
+	     /* FALLTHROUGH */
+    case 5 : b+=k[4];
+	     /* FALLTHROUGH */
+    case 4 : a+=((uint32_t)k[3])<<24;
+	     /* FALLTHROUGH */
+    case 3 : a+=((uint32_t)k[2])<<16;
+	     /* FALLTHROUGH */
+    case 2 : a+=((uint32_t)k[1])<<8;
+	     /* FALLTHROUGH */
+    case 1 : a+=k[0];
+             break;
+    case 0 : return NON_ZERO_64(b, c);
+    }
+  }
+
+  final(a,b,c);
+  return NON_ZERO_64(b, c);
+}
+#else
+#define hashlittle2(key, len) hashlittle(key, len)
+#endif

help-from-md.awk

@@ -0,0 +1,40 @@
+#!/usr/bin/awk -f
+
+# The caller must pass args: -v hfile=help-NAME.h NAME.NUM.md
+
+BEGIN {
+    heading = "/* DO NOT EDIT THIS FILE!  It is auto-generated from the option list in " ARGV[1] "! */"
+    findcomment = hfile
+    sub("\\.", "\\.", findcomment)
+    findcomment = "\\[comment\\].*" findcomment
+    backtick_cnt = 0
+    prints = ""
+}
+
+/^```/ {
+    backtick_cnt++
+    next
+}
+
+foundcomment {
+    if (backtick_cnt > 1) exit
+    if (backtick_cnt == 1) {
+	gsub(/"/, "\\\"")
+	prints = prints "\n  rprintf(F,\"" $0 "\\n\");"
+    }
+    next
+}
+
+$0 ~ findcomment {
+    foundcomment = 1
+    backtick_cnt = 0
+}
+
+END {
+    if (foundcomment && backtick_cnt > 1)
+	print heading "\n" prints > hfile
+    else {
+	print "Failed to find " hfile " section in " ARGV[1]
+	exit 1
+    }
+}

hlink.c

@@ -4,7 +4,7 @@
  * Copyright (C) 1996 Andrew Tridgell
  * Copyright (C) 1996 Paul Mackerras
  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
- * Copyright (C) 2004-2007 Wayne Davison
+ * Copyright (C) 2004-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,24 +21,24 @@
  */
 
 #include "rsync.h"
+#include "inums.h"
+#include "ifuncs.h"
 
-extern int verbose;
 extern int dry_run;
+extern int list_only;
 extern int am_sender;
 extern int inc_recurse;
 extern int do_xfers;
-extern int link_dest;
+extern int alt_dest_type;
 extern int preserve_acls;
-extern int make_backups;
+extern int preserve_xattrs;
 extern int protocol_version;
 extern int remove_source_files;
 extern int stdout_format_has_i;
 extern int maybe_ATTRS_REPORT;
-extern char *basis_dir[];
+extern int unsort_ndx;
+extern char *basis_dir[MAX_BASIS_DIRS+1];
 extern struct file_list *cur_flist;
-#ifdef ICONV_OPTION
-extern int ic_ndx;
-#endif
 
 #ifdef SUPPORT_HARD_LINKS
 
@@ -48,6 +48,8 @@ extern int ic_ndx;
  * we can avoid the pool of dev+inode data.  For incremental recursion mode,
  * the receiver will use a ndx hash to remember old pathnames. */
 
+static void *data_when_new = "";
+
 static struct hashtable *dev_tbl;
 
 static struct hashtable *prior_hlinks;
@@ -57,25 +59,29 @@ static struct file_list *hlink_flist;
 void init_hard_links(void)
 {
 	if (am_sender || protocol_version < 30)
-		dev_tbl = hashtable_create(16, SIZEOF_INT64 == 8);
+		dev_tbl = hashtable_create(16, HT_KEY64);
 	else if (inc_recurse)
-		prior_hlinks = hashtable_create(1024, 0);
+		prior_hlinks = hashtable_create(1024, HT_KEY32);
 }
 
 struct ht_int64_node *idev_find(int64 dev, int64 ino)
 {
 	static struct ht_int64_node *dev_node = NULL;
-	struct hashtable *tbl;
 
-	if (!dev_node || dev_node->key != dev) {
+	/* Note that some OSes have a dev == 0, so increment to avoid storing a 0. */
+	if (!dev_node || dev_node->key != dev+1) {
 		/* We keep a separate hash table of inodes for every device. */
-		dev_node = hashtable_find(dev_tbl, dev, 1);
-		if (!(tbl = dev_node->data))
-			tbl = dev_node->data = hashtable_create(512, SIZEOF_INT64 == 8);
-	} else
-		tbl = dev_node->data;
+		dev_node = hashtable_find(dev_tbl, dev+1, data_when_new);
+		if (dev_node->data == data_when_new) {
+			dev_node->data = hashtable_create(512, HT_KEY64);
+			if (DEBUG_GTE(HLINK, 3)) {
+				rprintf(FINFO, "[%s] created hashtable for dev %s\n",
+					who_am_i(), big_num(dev));
+			}
+		}
+	}
 
-	return hashtable_find(tbl, ino, 1);
+	return hashtable_find(dev_node->data, ino, (void*)-1L);
 }
 
 void idev_destroy(void)
@@ -111,27 +117,30 @@ static void match_gnums(int32 *ndx_list, int ndx_count)
 	struct ht_int32_node *node = NULL;
 	int32 gnum, gnum_next;
 
-	qsort(ndx_list, ndx_count, sizeof ndx_list[0],
-	     (int (*)()) hlink_compare_gnum);
+	qsort(ndx_list, ndx_count, sizeof ndx_list[0], (int (*)(const void*, const void*))hlink_compare_gnum);
 
 	for (from = 0; from < ndx_count; from++) {
 		file = hlink_flist->sorted[ndx_list[from]];
 		gnum = F_HL_GNUM(file);
 		if (inc_recurse) {
-			node = hashtable_find(prior_hlinks, gnum, 1);
-			if (!node->data) {
+			node = hashtable_find(prior_hlinks, gnum, data_when_new);
+			if (node->data == data_when_new) {
 				node->data = new_array0(char, 5);
 				assert(gnum >= hlink_flist->ndx_start);
 				file->flags |= FLAG_HLINK_FIRST;
 				prev = -1;
 			} else if (CVAL(node->data, 0) == 0) {
 				struct file_list *flist;
-				struct file_struct *fp;
 				prev = IVAL(node->data, 1);
-				flist = flist_for_ndx(prev);
-				assert(flist != NULL);
-				fp = flist->files[prev - flist->ndx_start];
-				fp->flags &= ~FLAG_HLINK_LAST;
+				flist = flist_for_ndx(prev, NULL);
+				if (flist)
+					flist->files[prev - flist->ndx_start]->flags &= ~FLAG_HLINK_LAST;
+				else {
+					/* We skipped all prior files in this
+					 * group, so mark this as a "first". */
+					file->flags |= FLAG_HLINK_FIRST;
+					prev = -1;
+				}
 			} else
 				prev = -1;
 		} else {
@@ -144,12 +153,10 @@ static void match_gnums(int32 *ndx_list, int ndx_count)
 			if (gnum != gnum_next)
 				break;
 			F_HL_PREV(file) = prev;
-			/* The linked list must use raw ndx values. */
-#ifdef ICONV_OPTION
-			if (ic_ndx)
+			/* The linked list uses over-the-wire ndx values. */
+			if (unsort_ndx)
 				prev = F_NDX(file);
 			else
-#endif
 				prev = ndx_list[from] + hlink_flist->ndx_start;
 		}
 		if (prev < 0 && !inc_recurse) {
@@ -163,11 +170,9 @@ static void match_gnums(int32 *ndx_list, int ndx_count)
 		file->flags |= FLAG_HLINK_LAST;
 		F_HL_PREV(file) = prev;
 		if (inc_recurse && CVAL(node->data, 0) == 0) {
-#ifdef ICONV_OPTION
-			if (ic_ndx)
+			if (unsort_ndx)
 				prev = F_NDX(file);
 			else
-#endif
 				prev = ndx_list[from] + hlink_flist->ndx_start;
 			SIVAL(node->data, 1, prev);
 		}
@@ -180,29 +185,30 @@ static void match_gnums(int32 *ndx_list, int ndx_count)
  * to first when we're done. */
 void match_hard_links(struct file_list *flist)
 {
-	int i, ndx_count = 0;
-	int32 *ndx_list;
+	if (!list_only && flist->used) {
+		int i, ndx_count = 0;
+		int32 *ndx_list;
 
-	if (!(ndx_list = new_array(int32, flist->used)))
-		out_of_memory("match_hard_links");
+		ndx_list = new_array(int32, flist->used);
 
-	for (i = 0; i < flist->used; i++) {
-		if (F_IS_HLINKED(flist->sorted[i]))
-			ndx_list[ndx_count++] = i;
+		for (i = 0; i < flist->used; i++) {
+			if (F_IS_HLINKED(flist->sorted[i]))
+				ndx_list[ndx_count++] = i;
+		}
+
+		hlink_flist = flist;
+
+		if (ndx_count)
+			match_gnums(ndx_list, ndx_count);
+
+		free(ndx_list);
 	}
-
-	hlink_flist = flist;
-
-	if (ndx_count)
-		match_gnums(ndx_list, ndx_count);
-
-	free(ndx_list);
 	if (protocol_version < 30)
 		idev_destroy();
 }
 
 static int maybe_hard_link(struct file_struct *file, int ndx,
-			   const char *fname, int statret, stat_x *sxp,
+			   char *fname, int statret, stat_x *sxp,
 			   const char *oldname, STRUCT_STAT *old_stp,
 			   const char *realname, int itemizing, enum logcode code)
 {
@@ -214,55 +220,70 @@ static int maybe_hard_link(struct file_struct *file, int ndx,
 					ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 					0, "");
 			}
-			if (verbose > 1 && maybe_ATTRS_REPORT)
+			if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 				rprintf(FCLIENT, "%s is uptodate\n", fname);
 			file->flags |= FLAG_HLINK_DONE;
 			return 0;
 		}
-		if (make_backups > 0) {
-			if (!make_backup(fname))
-				return -1;
-		} else if (robust_unlink(fname)) {
-			rsyserr(FERROR, errno, "unlink %s failed",
-				full_fname(fname));
-			return -1;
-		}
 	}
 
-	if (hard_link_one(file, fname, oldname, 0)) {
+	if (atomic_create(file, fname, NULL, oldname, MAKEDEV(0, 0), sxp, statret == 0 ? DEL_FOR_FILE : 0)) {
 		if (itemizing) {
 			itemize(fname, file, ndx, statret, sxp,
 				ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS, 0,
 				realname);
 		}
-		if (code != FNONE && verbose)
+		if (code != FNONE && INFO_GTE(NAME, 1))
 			rprintf(code, "%s => %s\n", fname, realname);
 		return 0;
 	}
+
 	return -1;
 }
 
 /* Figure out if a prior entry is still there or if we just have a
- * cached name for it.  Never called with a FLAG_HLINK_FIRST entry. */
-static char *check_prior(int prev_ndx, int gnum, struct file_list **flist_p)
+ * cached name for it. */
+static char *check_prior(struct file_struct *file, int gnum,
+			 int *prev_ndx_p, struct file_list **flist_p)
 {
-	struct file_list *flist = flist_for_ndx(prev_ndx);
+	struct file_struct *fp;
 	struct ht_int32_node *node;
+	int prev_ndx = F_HL_PREV(file);
 
-	if (flist) {
-		*flist_p = flist;
-		return NULL;
+	while (1) {
+		struct file_list *flist;
+		if (prev_ndx < 0
+		 || (flist = flist_for_ndx(prev_ndx, NULL)) == NULL)
+			break;
+		fp = flist->files[prev_ndx - flist->ndx_start];
+		if (!(fp->flags & FLAG_SKIP_HLINK)) {
+			*prev_ndx_p = prev_ndx;
+			*flist_p = flist;
+			return NULL;
+		}
+		F_HL_PREV(file) = prev_ndx = F_HL_PREV(fp);
 	}
 
-	node = hashtable_find(prior_hlinks, gnum, 0);
-	assert(node != NULL && node->data);
-	assert(CVAL(node->data, 0) != 0);
-	return node->data;
+	if (inc_recurse
+	 && (node = hashtable_find(prior_hlinks, gnum, NULL)) != NULL) {
+		assert(node->data != NULL);
+		if (CVAL(node->data, 0) != 0) {
+			*prev_ndx_p = -1;
+			*flist_p = NULL;
+			return node->data;
+		}
+		/* The prior file must have been skipped. */
+		F_HL_PREV(file) = -1;
+	}
+
+	*prev_ndx_p = -1;
+	*flist_p = NULL;
+	return NULL;
 }
 
 /* Only called if FLAG_HLINKED is set and FLAG_HLINK_FIRST is not.  Returns:
  * 0 = process the file, 1 = skip the file, -1 = error occurred. */
-int hard_link_check(struct file_struct *file, int ndx, const char *fname,
+int hard_link_check(struct file_struct *file, int ndx, char *fname,
 		    int statret, stat_x *sxp, int itemizing,
 		    enum logcode code)
 {
@@ -271,34 +292,53 @@ int hard_link_check(struct file_struct *file, int ndx, const char *fname,
 	char *realname, *prev_name;
 	struct file_list *flist;
 	int gnum = inc_recurse ? F_HL_GNUM(file) : -1;
-	int prev_ndx = F_HL_PREV(file);
+	int prev_ndx;
 
-	prev_name = realname = check_prior(prev_ndx, gnum, &flist);
+	prev_name = realname = check_prior(file, gnum, &prev_ndx, &flist);
 
 	if (!prev_name) {
-		struct file_struct *prev_file = flist->files[prev_ndx - flist->ndx_start];
+		struct file_struct *prev_file;
 
-		/* Is the previous link is not complete yet? */
+		if (!flist) {
+			/* The previous file was skipped, so this one is
+			 * treated as if it were the first in its group. */
+			if (DEBUG_GTE(HLINK, 2)) {
+				rprintf(FINFO, "hlink for %d (%s,%d): virtual first\n",
+					ndx, f_name(file, NULL), gnum);
+			}
+			return 0;
+		}
+
+		prev_file = flist->files[prev_ndx - flist->ndx_start];
+
+		/* Is the previous link not complete yet? */
 		if (!(prev_file->flags & FLAG_HLINK_DONE)) {
 			/* Is the previous link being transferred? */
 			if (prev_file->flags & FLAG_FILE_SENT) {
-				/* Add ourselves to the list of files that will be
-				 * updated when the transfer completes, and mark
-				 * ourself as waiting for the transfer. */
+				/* Add ourselves to the list of files that will
+				 * be updated when the transfer completes, and
+				 * mark ourself as waiting for the transfer. */
 				F_HL_PREV(file) = F_HL_PREV(prev_file);
 				F_HL_PREV(prev_file) = ndx;
 				file->flags |= FLAG_FILE_SENT;
 				cur_flist->in_progress++;
+				if (DEBUG_GTE(HLINK, 2)) {
+					rprintf(FINFO, "hlink for %d (%s,%d): waiting for %d\n",
+						ndx, f_name(file, NULL), gnum, F_HL_PREV(file));
+				}
 				return 1;
 			}
+			if (DEBUG_GTE(HLINK, 2)) {
+				rprintf(FINFO, "hlink for %d (%s,%d): looking for a leader\n",
+					ndx, f_name(file, NULL), gnum);
+			}
 			return 0;
 		}
 
 		/* There is a finished file to link with! */
 		if (!(prev_file->flags & FLAG_HLINK_FIRST)) {
 			/* The previous previous is FIRST when prev is not. */
-			prev_ndx = F_HL_PREV(prev_file);
-			prev_name = realname = check_prior(prev_ndx, gnum, &flist);
+			prev_name = realname = check_prior(prev_file, gnum, &prev_ndx, &flist);
 			/* Update our previous pointer to point to the FIRST. */
 			F_HL_PREV(file) = prev_ndx;
 		}
@@ -306,9 +346,14 @@ int hard_link_check(struct file_struct *file, int ndx, const char *fname,
 		if (!prev_name) {
 			int alt_dest;
 
+			assert(flist != NULL);
 			prev_file = flist->files[prev_ndx - flist->ndx_start];
 			/* F_HL_PREV() is alt_dest value when DONE && FIRST. */
 			alt_dest = F_HL_PREV(prev_file);
+			if (DEBUG_GTE(HLINK, 2)) {
+				rprintf(FINFO, "hlink for %d (%s,%d): found flist match (alt %d)\n",
+					ndx, f_name(file, NULL), gnum, alt_dest);
+			}
 
 			if (alt_dest >= 0 && dry_run) {
 				pathjoin(namebuf, MAXPATHLEN, basis_dir[alt_dest],
@@ -322,10 +367,19 @@ int hard_link_check(struct file_struct *file, int ndx, const char *fname,
 		}
 	}
 
+	if (DEBUG_GTE(HLINK, 2)) {
+		rprintf(FINFO, "hlink for %d (%s,%d): leader is %d (%s)\n",
+			ndx, f_name(file, NULL), gnum, prev_ndx, prev_name);
+	}
+
 	if (link_stat(prev_name, &prev_st, 0) < 0) {
-		rsyserr(FERROR, errno, "stat %s failed",
-			full_fname(prev_name));
-		return -1;
+		if (!dry_run || errno != ENOENT) {
+			rsyserr(FERROR_XFER, errno, "stat %s failed", full_fname(prev_name));
+			return -1;
+		}
+		/* A new hard-link will get a new dev & inode, so approximate
+		 * those values in dry-run mode by zeroing them. */
+		memset(&prev_st, 0, sizeof prev_st);
 	}
 
 	if (statret < 0 && basis_dir[0] != NULL) {
@@ -333,27 +387,26 @@ int hard_link_check(struct file_struct *file, int ndx, const char *fname,
 		char cmpbuf[MAXPATHLEN];
 		stat_x alt_sx;
 		int j = 0;
-#ifdef SUPPORT_ACLS
-		alt_sx.acc_acl = alt_sx.def_acl = NULL;
-#endif
+		init_stat_x(&alt_sx);
 		do {
 			pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 			if (link_stat(cmpbuf, &alt_sx.st, 0) < 0)
 				continue;
-			if (link_dest) {
+			if (alt_dest_type == LINK_DEST) {
 				if (prev_st.st_dev != alt_sx.st.st_dev
 				 || prev_st.st_ino != alt_sx.st.st_ino)
 					continue;
 				statret = 1;
-				if (verbose < 2 || !stdout_format_has_i) {
+				if (stdout_format_has_i == 0
+				 || (!INFO_GTE(NAME, 2) && stdout_format_has_i < 2)) {
 					itemizing = 0;
 					code = FNONE;
-					if (verbose > 1 && maybe_ATTRS_REPORT)
+					if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 						rprintf(FCLIENT, "%s is uptodate\n", fname);
 				}
 				break;
 			}
-			if (!unchanged_file(cmpbuf, file, &alt_sx.st))
+			if (!quick_check_ok(FT_REG, cmpbuf, file, &alt_sx.st))
 				continue;
 			statret = 1;
 			if (unchanged_attrs(cmpbuf, file, &alt_sx))
@@ -363,19 +416,29 @@ int hard_link_check(struct file_struct *file, int ndx, const char *fname,
 			sxp->st = alt_sx.st;
 #ifdef SUPPORT_ACLS
 			if (preserve_acls && !S_ISLNK(file->mode)) {
-				if (!ACL_READY(*sxp))
+				free_acl(sxp);
+				if (!ACL_READY(alt_sx))
 					get_acl(cmpbuf, sxp);
 				else {
 					sxp->acc_acl = alt_sx.acc_acl;
 					sxp->def_acl = alt_sx.def_acl;
+					alt_sx.acc_acl = alt_sx.def_acl = NULL;
 				}
 			}
 #endif
-		}
-#ifdef SUPPORT_ACLS
-		else if (preserve_acls)
-			free_acl(&alt_sx);
+#ifdef SUPPORT_XATTRS
+			if (preserve_xattrs) {
+				free_xattr(sxp);
+				if (!XATTR_READY(alt_sx))
+					get_xattr(cmpbuf, sxp);
+				else {
+					sxp->xattr = alt_sx.xattr;
+					alt_sx.xattr = NULL;
+				}
+			}
 #endif
+		} else
+			free_stat_x(&alt_sx);
 	}
 
 	if (maybe_hard_link(file, ndx, fname, statret, sxp, prev_name, &prev_st,
@@ -383,7 +446,7 @@ int hard_link_check(struct file_struct *file, int ndx, const char *fname,
 		return -1;
 
 	if (remove_source_files == 1 && do_xfers)
-		send_msg_int(MSG_SUCCESS, ndx);
+		send_msg_success(fname, ndx);
 
 	return 1;
 }
@@ -391,14 +454,14 @@ int hard_link_check(struct file_struct *file, int ndx, const char *fname,
 int hard_link_one(struct file_struct *file, const char *fname,
 		  const char *oldname, int terse)
 {
-	if (do_link(oldname, fname) < 0) {
+	if (do_link_at(oldname, fname) < 0) {
 		enum logcode code;
 		if (terse) {
-			if (!verbose)
-				return -1;
+			if (!INFO_GTE(NAME, 1))
+				return 0;
 			code = FINFO;
 		} else
-			code = FERROR;
+			code = FERROR_XFER;
 		rsyserr(code, errno, "link %s => %s failed",
 			full_fname(fname), oldname);
 		return 0;
@@ -415,14 +478,14 @@ void finish_hard_link(struct file_struct *file, const char *fname, int fin_ndx,
 {
 	stat_x prev_sx;
 	STRUCT_STAT st;
-	char alt_name[MAXPATHLEN], *prev_name;
+	char prev_name[MAXPATHLEN], alt_name[MAXPATHLEN];
 	const char *our_name;
 	struct file_list *flist;
 	int prev_statret, ndx, prev_ndx = F_HL_PREV(file);
 
 	if (stp == NULL && prev_ndx >= 0) {
-		if (link_stat(fname, &st, 0) < 0) {
-			rsyserr(FERROR, errno, "stat %s failed",
+		if (link_stat(fname, &st, 0) < 0 && !dry_run) {
+			rsyserr(FERROR_XFER, errno, "stat %s failed",
 				full_fname(fname));
 			return;
 		}
@@ -439,41 +502,65 @@ void finish_hard_link(struct file_struct *file, const char *fname, int fin_ndx,
 	} else
 		our_name = fname;
 
-#ifdef SUPPORT_ACLS
-	prev_sx.acc_acl = prev_sx.def_acl = NULL;
-#endif
+	init_stat_x(&prev_sx);
 
 	while ((ndx = prev_ndx) >= 0) {
 		int val;
-		flist = flist_for_ndx(ndx);
-		assert(flist != NULL);
+		flist = flist_for_ndx(ndx, "finish_hard_link");
 		file = flist->files[ndx - flist->ndx_start];
 		file->flags = (file->flags & ~FLAG_HLINK_FIRST) | FLAG_HLINK_DONE;
 		prev_ndx = F_HL_PREV(file);
 		F_HL_PREV(file) = fin_ndx;
-		prev_name = f_name(file, NULL);
-		prev_statret = link_stat(prev_name, &prev_sx.st, 0);
+		prev_statret = link_stat(f_name(file, prev_name), &prev_sx.st, 0);
 		val = maybe_hard_link(file, ndx, prev_name, prev_statret, &prev_sx,
 				      our_name, stp, fname, itemizing, code);
 		flist->in_progress--;
-#ifdef SUPPORT_ACLS
-		if (preserve_acls)
-			free_acl(&prev_sx);
-#endif
+		free_stat_x(&prev_sx);
 		if (val < 0)
 			continue;
 		if (remove_source_files == 1 && do_xfers)
-			send_msg_int(MSG_SUCCESS, ndx);
+			send_msg_success(fname, ndx);
 	}
 
 	if (inc_recurse) {
 		int gnum = F_HL_GNUM(file);
-		struct ht_int32_node *node = hashtable_find(prior_hlinks, gnum, 0);
-		assert(node != NULL && node->data != NULL);
-		assert(CVAL(node->data, 0) == 0);
+		struct ht_int32_node *node = hashtable_find(prior_hlinks, gnum, NULL);
+		if (node == NULL) {
+			rprintf(FERROR, "Unable to find a hlink node for %d (%s)\n", gnum, f_name(file, prev_name));
+			exit_cleanup(RERR_MESSAGEIO);
+		}
+		if (node->data == NULL) {
+			rprintf(FERROR, "Hlink node data for %d is NULL (%s)\n", gnum, f_name(file, prev_name));
+			exit_cleanup(RERR_MESSAGEIO);
+		}
+		if (CVAL(node->data, 0) != 0) {
+			rprintf(FERROR, "Hlink node data for %d already has path=%s (%s)\n",
+				gnum, (char*)node->data, f_name(file, prev_name));
+			exit_cleanup(RERR_MESSAGEIO);
+		}
 		free(node->data);
-		if (!(node->data = strdup(our_name)))
-			out_of_memory("finish_hard_link");
+		node->data = strdup(our_name);
 	}
 }
+
+int skip_hard_link(struct file_struct *file, struct file_list **flist_p)
+{
+	struct file_list *flist;
+	int prev_ndx;
+
+	file->flags |= FLAG_SKIP_HLINK;
+	if (!(file->flags & FLAG_HLINK_LAST))
+		return -1;
+
+	check_prior(file, F_HL_GNUM(file), &prev_ndx, &flist);
+	if (prev_ndx >= 0) {
+		file = flist->files[prev_ndx - flist->ndx_start];
+		if (file->flags & (FLAG_HLINK_DONE|FLAG_FILE_SENT))
+			return -1;
+		file->flags |= FLAG_HLINK_LAST;
+		*flist_p = flist;
+	}
+
+	return prev_ndx;
+}
 #endif

ifuncs.h

@@ -1,6 +1,6 @@
 /* Inline functions for rsync.
  *
- * Copyright (C) 2007 Wayne Davison
+ * Copyright (C) 2007-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,8 +19,7 @@
 static inline void
 alloc_xbuf(xbuf *xb, size_t sz)
 {
-	if (!(xb->buf = new_array(char, sz)))
-		out_of_memory("alloc_xbuf");
+	xb->buf = new_array(char, sz);
 	xb->size = sz;
 	xb->len = xb->pos = 0;
 }
@@ -29,12 +28,18 @@ static inline void
 realloc_xbuf(xbuf *xb, size_t sz)
 {
 	char *bf = realloc_array(xb->buf, char, sz);
-	if (!bf)
-		out_of_memory("realloc_xbuf");
 	xb->buf = bf;
 	xb->size = sz;
 }
 
+static inline void
+free_xbuf(xbuf *xb)
+{
+	if (xb->buf)
+		free(xb->buf);
+	memset(xb, 0, sizeof (xbuf));
+}
+
 static inline int
 to_wire_mode(mode_t mode)
 {
@@ -57,44 +62,51 @@ from_wire_mode(int mode)
 	return mode;
 }
 
-static inline int
-isDigit(const char *ptr)
+static inline char *
+d_name(struct dirent *di)
 {
-	return isdigit(*(unsigned char *)ptr);
+#ifdef HAVE_BROKEN_READDIR
+	return (di->d_name - 2);
+#else
+	return di->d_name;
+#endif
 }
 
-static inline int
-isPrint(const char *ptr)
+static inline void
+init_stat_x(stat_x *sx_p)
 {
-	return isprint(*(unsigned char *)ptr);
+	sx_p->crtime = 0;
+#ifdef SUPPORT_ACLS
+	sx_p->acc_acl = sx_p->def_acl = NULL;
+#endif
+#ifdef SUPPORT_XATTRS
+	sx_p->xattr = NULL;
+#endif
 }
 
-static inline int
-isSpace(const char *ptr)
+static inline void
+free_stat_x(stat_x *sx_p)
 {
-	return isspace(*(unsigned char *)ptr);
+#ifdef SUPPORT_ACLS
+    {
+	extern int preserve_acls;
+	if (preserve_acls)
+		free_acl(sx_p);
+    }
+#endif
+#ifdef SUPPORT_XATTRS
+    {
+	extern int preserve_xattrs;
+	if (preserve_xattrs)
+		free_xattr(sx_p);
+    }
+#endif
 }
 
-static inline int
-isLower(const char *ptr)
+static inline char *my_strdup(const char *str, const char *file, int line)
 {
-	return islower(*(unsigned char *)ptr);
-}
-
-static inline int
-isUpper(const char *ptr)
-{
-	return isupper(*(unsigned char *)ptr);
-}
-
-static inline int
-toLower(const char *ptr)
-{
-	return tolower(*(unsigned char *)ptr);
-}
-
-static inline int
-toUpper(const char *ptr)
-{
-	return toupper(*(unsigned char *)ptr);
+    int len = strlen(str)+1;
+    char *buf = my_alloc(NULL, len, 1, file, line);
+    memcpy(buf, str, len);
+    return buf;
 }

install-sh

@@ -115,7 +115,7 @@ else
 # might cause directories to be created, which would be especially bad 
 # if $src (and thus $dsttmp) contains '*'.
 
-	if [ -f $src -o -d $src ]
+	if [ -f $src ] || [ -d $src ]
 	then
 		true
 	else

inums.h

@@ -0,0 +1,57 @@
+/* Inline functions for rsync.
+ *
+ * Copyright (C) 2008-2019 Wayne Davison
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
+ */
+
+static inline char *
+big_num(int64 num)
+{
+	return do_big_num(num, 0, NULL);
+}
+
+static inline char *
+comma_num(int64 num)
+{
+	extern int human_readable;
+	return do_big_num(num, human_readable != 0, NULL);
+}
+
+static inline char *
+human_num(int64 num)
+{
+	extern int human_readable;
+	return do_big_num(num, human_readable, NULL);
+}
+
+static inline char *
+big_dnum(double dnum, int decimal_digits)
+{
+	return do_big_dnum(dnum, 0, decimal_digits);
+}
+
+static inline char *
+comma_dnum(double dnum, int decimal_digits)
+{
+	extern int human_readable;
+	return do_big_dnum(dnum, human_readable != 0, decimal_digits);
+}
+
+static inline char *
+human_dnum(double dnum, int decimal_digits)
+{
+	extern int human_readable;
+	return do_big_dnum(dnum, human_readable, decimal_digits);
+}

io.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007 Wayne Davison
+ * Copyright (C) 2007-2019 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

itypes.h

@@ -0,0 +1,71 @@
+/* Inline functions for rsync.
+ *
+ * Copyright (C) 2007-2022 Wayne Davison
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
+ */
+
+static inline int
+isDigit(const char *ptr)
+{
+	return isdigit(*(unsigned char *)ptr);
+}
+
+static inline int
+isHexDigit(const char *ptr)
+{
+	return isxdigit(*(unsigned char *)ptr);
+}
+
+static inline int
+isPrint(const char *ptr)
+{
+	return isprint(*(unsigned char *)ptr);
+}
+
+static inline int
+isSpace(const char *ptr)
+{
+	return isspace(*(unsigned char *)ptr);
+}
+
+static inline int
+isAlNum(const char *ptr)
+{
+	return isalnum(*(unsigned char *)ptr);
+}
+
+static inline int
+isLower(const char *ptr)
+{
+	return islower(*(unsigned char *)ptr);
+}
+
+static inline int
+isUpper(const char *ptr)
+{
+	return isupper(*(unsigned char *)ptr);
+}
+
+static inline int
+toLower(const char *ptr)
+{
+	return tolower(*(unsigned char *)ptr);
+}
+
+static inline int
+toUpper(const char *ptr)
+{
+	return toupper(*(unsigned char *)ptr);
+}

latest-year.h

@@ -0,0 +1 @@
+#define LATEST_YEAR "2026"

lib/.cvsignore

@@ -1 +0,0 @@
-dummy

lib/addrinfo.h

@@ -0,0 +1,180 @@
+/*
+PostgreSQL Database Management System
+(formerly known as Postgres, then as Postgres95)
+
+Portions Copyright (c) 1996-2005, The PostgreSQL Global Development Group
+
+Portions Copyright (c) 1994, The Regents of the University of California
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose, without fee, and without a written agreement
+is hereby granted, provided that the above copyright notice and this paragraph
+and the following two paragraphs appear in all copies.
+
+IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
+DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
+LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION,
+EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+
+THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS
+TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+
+*/
+
+/*-------------------------------------------------------------------------
+ *
+ * getaddrinfo.h
+ *	  Support getaddrinfo() on platforms that don't have it.
+ *
+ * Note: we use our own routines on platforms that don't HAVE_STRUCT_ADDRINFO,
+ * whether or not the library routine getaddrinfo() can be found.  This
+ * policy is needed because on some platforms a manually installed libbind.a
+ * may provide getaddrinfo(), yet the system headers may not provide the
+ * struct definitions needed to call it.  To avoid conflict with the libbind
+ * definition in such cases, we rename our routines to pg_xxx() via macros.
+ *
+ * This code will also work on platforms where struct addrinfo is defined
+ * in the system headers but no getaddrinfo() can be located.
+ *
+ * Copyright (c) 2003-2007, PostgreSQL Global Development Group
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef ADDRINFO_H
+#define ADDRINFO_H
+
+
+/* Various macros that ought to be in <netdb.h>, but might not be */
+
+#ifndef EAI_FAIL
+#define EAI_BADFLAGS	(-1)
+#define EAI_NONAME		(-2)
+#define EAI_AGAIN		(-3)
+#define EAI_FAIL		(-4)
+#define EAI_FAMILY		(-6)
+#define EAI_SOCKTYPE	(-7)
+#define EAI_SERVICE		(-8)
+#define EAI_MEMORY		(-10)
+#define EAI_SYSTEM		(-11)
+#endif   /* !EAI_FAIL */
+
+#ifndef AI_PASSIVE
+#define AI_PASSIVE		0x0001
+#endif
+
+#ifndef AI_NUMERICHOST
+/*
+ * some platforms don't support AI_NUMERICHOST; define as zero if using
+ * the system version of getaddrinfo...
+ */
+#if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
+#define AI_NUMERICHOST	0
+#else
+#define AI_NUMERICHOST	0x0004
+#endif
+#endif
+
+#ifndef AI_CANONNAME
+#if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
+#define AI_CANONNAME 0
+#else
+#define AI_CANONNAME 0x0008
+#endif
+#endif
+
+#ifndef AI_NUMERICSERV
+#if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
+#define AI_NUMERICSERV 0
+#else
+#define AI_NUMERICSERV 0x0010
+#endif
+#endif
+
+#ifndef NI_NUMERICHOST
+#define NI_NUMERICHOST	1
+#endif
+
+#ifndef NI_NUMERICSERV
+#define NI_NUMERICSERV	2
+#endif
+
+#ifndef NI_NOFQDN
+#define NI_NOFQDN	4
+#endif
+
+#ifndef NI_NAMEREQD
+#define NI_NAMEREQD 	8
+#endif
+
+#ifndef NI_DGRAM
+#define NI_DGRAM	16
+#endif
+
+
+#ifndef NI_MAXHOST
+#define NI_MAXHOST	1025
+#endif
+
+#ifndef NI_MAXSERV
+#define NI_MAXSERV	32
+#endif
+
+#ifndef HAVE_STRUCT_ADDRINFO
+struct addrinfo
+{
+	int			ai_flags;
+	int			ai_family;
+	int			ai_socktype;
+	int			ai_protocol;
+	size_t		ai_addrlen;
+	struct sockaddr *ai_addr;
+	char	   *ai_canonname;
+	struct addrinfo *ai_next;
+};
+#endif   /* !HAVE_STRUCT_ADDRINFO */
+
+#ifndef HAVE_STRUCT_SOCKADDR_STORAGE
+struct sockaddr_storage {
+	unsigned short ss_family;
+	unsigned long ss_align;
+	char ss_padding[128 - sizeof (unsigned long)];
+};
+#endif	/* !HAVE_STRUCT_SOCKADDR_STORAGE */
+
+#ifndef HAVE_GETADDRINFO
+
+/* Rename private copies per comments above */
+#ifdef getaddrinfo
+#undef getaddrinfo
+#endif
+#define getaddrinfo pg_getaddrinfo
+
+#ifdef freeaddrinfo
+#undef freeaddrinfo
+#endif
+#define freeaddrinfo pg_freeaddrinfo
+
+#ifdef gai_strerror
+#undef gai_strerror
+#endif
+#define gai_strerror pg_gai_strerror
+
+#ifdef getnameinfo
+#undef getnameinfo
+#endif
+#define getnameinfo pg_getnameinfo
+
+extern int getaddrinfo(const char *node, const char *service,
+			const struct addrinfo * hints, struct addrinfo ** res);
+extern void freeaddrinfo(struct addrinfo * res);
+extern const char *gai_strerror(int errcode);
+extern int getnameinfo(const struct sockaddr * sa, socklen_t salen,
+			char *node, size_t nodelen,
+			char *service, size_t servicelen, int flags);
+#endif   /* !HAVE_GETADDRINFO */
+
+#endif   /* ADDRINFO_H */

lib/compat.c

@@ -3,7 +3,7 @@
  *
  * Copyright (C) 1998 Andrew Tridgell
  * Copyright (C) 2002 Martin Pool
- * Copyright (C) 2004, 2005, 2006 Wayne Davison
+ * Copyright (C) 2004-2020 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,17 +20,28 @@
  */
 
 #include "rsync.h"
+#include "itypes.h"
 
-#ifndef HAVE_STRDUP
- char *strdup(char *s)
+static char number_separator;
+
+char get_number_separator(void)
 {
-	int len = strlen(s) + 1;
-	char *ret = (char *)malloc(len);
-	if (ret)
-		memcpy(ret, s, len);
-	return ret;
+	if (!number_separator) {
+		char buf[32];
+		snprintf(buf, sizeof buf, "%f", 3.14);
+		if (strchr(buf, '.') != NULL)
+			number_separator = ',';
+		else
+			number_separator = '.';
+	}
+
+	return number_separator;
+}
+
+char get_decimal_point(void)
+{
+	return get_number_separator() == ',' ? '.' : ',';
 }
-#endif
 
 #ifndef HAVE_GETCWD
  char *getcwd(char *buf, int size)
@@ -76,7 +87,7 @@
 
 #ifndef HAVE_STRPBRK
 /**
- * Find the first ocurrence in @p s of any character in @p accept.
+ * Find the first occurrence in @p s of any character in @p accept.
  *
  * Derived from glibc
  **/
@@ -151,3 +162,111 @@ int sys_gettimeofday(struct timeval *tv)
 	return gettimeofday(tv);
 #endif
 }
+
+/* Return the int64 number as a string.  If the human_flag arg is non-zero,
+ * we may output the number in K, M, G, or T units.  If we don't add a unit
+ * suffix, we will append the fract string, if it is non-NULL.  We can
+ * return up to 4 buffers at a time. */
+char *do_big_num(int64 num, int human_flag, const char *fract)
+{
+	static char bufs[4][128]; /* more than enough room */
+	static unsigned int n;
+	char *s;
+	int len, negated;
+
+	if (human_flag && !number_separator)
+		(void)get_number_separator();
+
+	n = (n + 1) % (sizeof bufs / sizeof bufs[0]);
+
+	if (human_flag > 1) {
+		int mult = human_flag == 2 ? 1000 : 1024;
+		if (num >= mult || num <= -mult) {
+			double dnum = (double)num / mult;
+			char units;
+			if (num < 0)
+				dnum = -dnum;
+			if (dnum < mult)
+				units = 'K';
+			else if ((dnum /= mult) < mult)
+				units = 'M';
+			else if ((dnum /= mult) < mult)
+				units = 'G';
+			else if ((dnum /= mult) < mult)
+				units = 'T';
+			else {
+				dnum /= mult;
+				units = 'P';
+			}
+			if (num < 0)
+				dnum = -dnum;
+			snprintf(bufs[n], sizeof bufs[0], "%.2f%c", dnum, units);
+			return bufs[n];
+		}
+	}
+
+	s = bufs[n] + sizeof bufs[0] - 1;
+	if (fract) {
+		len = strlen(fract);
+		s -= len;
+		strlcpy(s, fract, len + 1);
+	} else
+		*s = '\0';
+
+	len = 0;
+
+	if (!num)
+		*--s = '0';
+	if (num < 0) {
+		/* A maximum-size negated number can't fit as a positive,
+		 * so do one digit in negated form to start us off. */
+		*--s = (char)(-(num % 10)) + '0';
+		num = -(num / 10);
+		len++;
+		negated = 1;
+	} else
+		negated = 0;
+
+	while (num) {
+		if (human_flag) {
+			if (len == 3) {
+				*--s = number_separator;
+				len = 1;
+			} else
+				len++;
+		}
+		*--s = (char)(num % 10) + '0';
+		num /= 10;
+	}
+
+	if (negated)
+		*--s = '-';
+
+	return s;
+}
+
+/* Return the double number as a string.  If the human_flag option is > 1,
+ * we may output the number in K, M, G, or T units.  The buffer we use for
+ * our result is either a single static buffer defined here, or a buffer
+ * we get from do_big_num(). */
+char *do_big_dnum(double dnum, int human_flag, int decimal_digits)
+{
+	static char tmp_buf[128];
+#if SIZEOF_INT64 >= 8
+	char *fract;
+
+	snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);
+
+	if (!human_flag || (dnum < 1000.0 && dnum > -1000.0))
+		return tmp_buf;
+
+	for (fract = tmp_buf+1; isDigit(fract); fract++) {}
+
+	return do_big_num((int64)dnum, human_flag, fract);
+#else
+	/* A big number might lose digits converting to a too-short int64,
+	 * so let's just return the raw double conversion. */
+	snprintf(tmp_buf, sizeof tmp_buf, "%.*f", decimal_digits, dnum);
+	return tmp_buf;
+#endif
+}

lib/getaddrinfo.c

@@ -0,0 +1,504 @@
+/*
+PostgreSQL Database Management System
+(formerly known as Postgres, then as Postgres95)
+
+Portions Copyright (c) 1996-2005, The PostgreSQL Global Development Group
+
+Portions Copyright (c) 1994, The Regents of the University of California
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose, without fee, and without a written agreement
+is hereby granted, provided that the above copyright notice and this paragraph
+and the following two paragraphs appear in all copies.
+
+IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
+DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
+LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION,
+EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+
+THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS
+TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+
+*/
+
+/*-------------------------------------------------------------------------
+ *
+ * getaddrinfo.c
+ *	  Support getaddrinfo() on platforms that don't have it.
+ *
+ * We also supply getnameinfo() here, assuming that the platform will have
+ * it if and only if it has getaddrinfo().	If this proves false on some
+ * platform, we'll need to split this file and provide a separate configure
+ * test for getnameinfo().
+ *
+ * Copyright (c) 2003-2007, PostgreSQL Global Development Group
+ *
+ * Copyright (C) 2007 Jeremy Allison.
+ * Modified to return multiple IPv4 addresses for Samba.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include "rsync.h"
+
+#ifndef SMB_MALLOC
+#define SMB_MALLOC(s) malloc(s)
+#endif
+
+#ifndef SMB_STRDUP
+#define SMB_STRDUP(s) strdup(s)
+#endif
+
+#ifndef HOST_NAME_MAX
+#define HOST_NAME_MAX 255
+#endif
+
+static int check_hostent_err(struct hostent *hp)
+{
+#ifndef INET6
+	extern int h_errno;
+#endif
+	if (!hp) {
+		switch (h_errno) {
+			case HOST_NOT_FOUND:
+			case NO_DATA:
+				return EAI_NONAME;
+			case TRY_AGAIN:
+				return EAI_AGAIN;
+			case NO_RECOVERY:
+			default:
+				return EAI_FAIL;
+		}
+	}
+	if (!hp->h_name || hp->h_addrtype != AF_INET) {
+		return EAI_FAIL;
+	}
+	return 0;
+}
+
+static char *canon_name_from_hostent(struct hostent *hp,
+				int *perr)
+{
+	char *ret = NULL;
+
+	*perr = check_hostent_err(hp);
+	if (*perr) {
+		return NULL;
+	}
+	ret = SMB_STRDUP(hp->h_name);
+	if (!ret) {
+		*perr = EAI_MEMORY;
+	}
+	return ret;
+}
+
+static char *get_my_canon_name(int *perr)
+{
+	char name[HOST_NAME_MAX+1];
+
+	if (gethostname(name, HOST_NAME_MAX) == -1) {
+		*perr = EAI_FAIL;
+		return NULL;
+	}
+	/* Ensure null termination. */
+	name[HOST_NAME_MAX] = '\0';
+	return canon_name_from_hostent(gethostbyname(name), perr);
+}
+
+static char *get_canon_name_from_addr(struct in_addr ip,
+				int *perr)
+{
+	return canon_name_from_hostent(
+			gethostbyaddr((void *)&ip, sizeof ip, AF_INET),
+			perr);
+}
+
+static struct addrinfo *alloc_entry(const struct addrinfo *hints,
+				struct in_addr ip,
+				unsigned short port)
+{
+	struct sockaddr_in *psin = NULL;
+	struct addrinfo *ai = SMB_MALLOC(sizeof(*ai));
+
+	if (!ai) {
+		return NULL;
+	}
+	memset(ai, '\0', sizeof(*ai));
+
+	psin = SMB_MALLOC(sizeof(*psin));
+	if (!psin) {
+		free(ai);
+		return NULL;
+	}
+
+	memset(psin, '\0', sizeof(*psin));
+
+	psin->sin_family = AF_INET;
+	psin->sin_port = htons(port);
+	psin->sin_addr = ip;
+
+	ai->ai_flags = 0;
+	ai->ai_family = AF_INET;
+	ai->ai_socktype = hints->ai_socktype;
+	ai->ai_protocol = hints->ai_protocol;
+	ai->ai_addrlen = sizeof(*psin);
+	ai->ai_addr = (struct sockaddr *) psin;
+	ai->ai_canonname = NULL;
+	ai->ai_next = NULL;
+
+	return ai;
+}
+
+/*
+ * get address info for a single ipv4 address.
+ *
+ *	Bugs:	- servname can only be a number, not text.
+ */
+
+static int getaddr_info_single_addr(const char *service,
+				uint32 addr,
+				const struct addrinfo *hints,
+				struct addrinfo **res)
+{
+
+	struct addrinfo *ai = NULL;
+	struct in_addr ip;
+	unsigned short port = 0;
+
+	if (service) {
+		port = (unsigned short)atoi(service);
+	}
+	ip.s_addr = htonl(addr);
+
+	ai = alloc_entry(hints, ip, port);
+	if (!ai) {
+		return EAI_MEMORY;
+	}
+
+	/* If we're asked for the canonical name,
+	 * make sure it returns correctly. */
+	if (!(hints->ai_flags & AI_NUMERICSERV) &&
+			hints->ai_flags & AI_CANONNAME) {
+		int err;
+		if (addr == INADDR_LOOPBACK || addr == INADDR_ANY) {
+			ai->ai_canonname = get_my_canon_name(&err);
+		} else {
+			ai->ai_canonname =
+			get_canon_name_from_addr(ip,&err);
+		}
+		if (ai->ai_canonname == NULL) {
+			freeaddrinfo(ai);
+			return err;
+		}
+	}
+
+	*res = ai;
+	return 0;
+}
+
+/*
+ * get address info for multiple ipv4 addresses.
+ *
+ *	Bugs:	- servname can only be a number, not text.
+ */
+
+static int getaddr_info_name(const char *node,
+				const char *service,
+				const struct addrinfo *hints,
+				struct addrinfo **res)
+{
+	struct addrinfo *listp = NULL, *prevp = NULL;
+	char **pptr = NULL;
+	int err;
+	struct hostent *hp = NULL;
+	unsigned short port = 0;
+
+	if (service) {
+		port = (unsigned short)atoi(service);
+	}
+
+	hp = gethostbyname(node);
+	err = check_hostent_err(hp);
+	if (err) {
+		return err;
+	}
+
+	for(pptr = hp->h_addr_list; *pptr; pptr++) {
+		struct in_addr ip = *(struct in_addr *)*pptr;
+		struct addrinfo *ai = alloc_entry(hints, ip, port);
+
+		if (!ai) {
+			freeaddrinfo(listp);
+			return EAI_MEMORY;
+		}
+
+		if (!listp) {
+			listp = ai;
+			prevp = ai;
+			ai->ai_canonname = SMB_STRDUP(hp->h_name);
+			if (!ai->ai_canonname) {
+				freeaddrinfo(listp);
+				return EAI_MEMORY;
+			}
+		} else {
+			prevp->ai_next = ai;
+			prevp = ai;
+		}
+	}
+	*res = listp;
+	return 0;
+}
+
+/*
+ * get address info for ipv4 sockets.
+ *
+ *	Bugs:	- servname can only be a number, not text.
+ */
+
+int getaddrinfo(const char *node,
+		const char *service,
+		const struct addrinfo * hintp,
+		struct addrinfo ** res)
+{
+	struct addrinfo hints;
+
+	/* Setup the hints struct. */
+	if (hintp == NULL) {
+		memset(&hints, 0, sizeof(hints));
+		hints.ai_family = AF_INET;
+		hints.ai_socktype = SOCK_STREAM;
+	} else {
+		memcpy(&hints, hintp, sizeof(hints));
+	}
+
+	if (hints.ai_family != AF_INET && hints.ai_family != AF_UNSPEC) {
+		return EAI_FAMILY;
+	}
+
+	if (hints.ai_socktype == 0) {
+		hints.ai_socktype = SOCK_STREAM;
+	}
+
+	if (!node && !service) {
+		return EAI_NONAME;
+	}
+
+	if (node) {
+		if (node[0] == '\0') {
+			return getaddr_info_single_addr(service,
+					INADDR_ANY,
+					&hints,
+					res);
+		} else if (hints.ai_flags & AI_NUMERICHOST) {
+			struct in_addr ip;
+			if (inet_pton(AF_INET, node, &ip) <= 0)
+				return EAI_FAIL;
+			return getaddr_info_single_addr(service,
+					ntohl(ip.s_addr),
+					&hints,
+					res);
+		} else {
+			return getaddr_info_name(node,
+						service,
+						&hints,
+						res);
+		}
+	} else if (hints.ai_flags & AI_PASSIVE) {
+		return getaddr_info_single_addr(service,
+					INADDR_ANY,
+					&hints,
+					res);
+	}
+	return getaddr_info_single_addr(service,
+					INADDR_LOOPBACK,
+					&hints,
+					res);
+}
+
+
+void freeaddrinfo(struct addrinfo *res)
+{
+	struct addrinfo *next = NULL;
+
+	for (;res; res = next) {
+		next = res->ai_next;
+		if (res->ai_canonname) {
+			free(res->ai_canonname);
+		}
+		if (res->ai_addr) {
+			free(res->ai_addr);
+		}
+		free(res);
+	}
+}
+
+
+const char *gai_strerror(int errcode)
+{
+#ifdef HAVE_HSTRERROR
+	int			hcode;
+
+	switch (errcode)
+	{
+		case EAI_NONAME:
+			hcode = HOST_NOT_FOUND;
+			break;
+		case EAI_AGAIN:
+			hcode = TRY_AGAIN;
+			break;
+		case EAI_FAIL:
+		default:
+			hcode = NO_RECOVERY;
+			break;
+	}
+
+	return hstrerror(hcode);
+#else							/* !HAVE_HSTRERROR */
+
+	switch (errcode)
+	{
+		case EAI_NONAME:
+			return "Unknown host";
+		case EAI_AGAIN:
+			return "Host name lookup failure";
+#ifdef EAI_BADFLAGS
+		case EAI_BADFLAGS:
+			return "Invalid argument";
+#endif
+#ifdef EAI_FAMILY
+		case EAI_FAMILY:
+			return "Address family not supported";
+#endif
+#ifdef EAI_MEMORY
+		case EAI_MEMORY:
+			return "Not enough memory";
+#endif
+#ifdef EAI_NODATA
+		case EAI_NODATA:
+			return "No host data of that type was found";
+#endif
+#ifdef EAI_SERVICE
+		case EAI_SERVICE:
+			return "Class type not found";
+#endif
+#ifdef EAI_SOCKTYPE
+		case EAI_SOCKTYPE:
+			return "Socket type not supported";
+#endif
+		default:
+			return "Unknown server error";
+	}
+#endif   /* HAVE_HSTRERROR */
+}
+
+static int gethostnameinfo(const struct sockaddr *sa,
+			char *node,
+			size_t nodelen,
+			int flags)
+{
+	int ret = -1;
+	char *p = NULL;
+
+	if (!(flags & NI_NUMERICHOST)) {
+		struct hostent *hp = gethostbyaddr(
+				(void *)&((struct sockaddr_in *)sa)->sin_addr,
+				sizeof (struct in_addr),
+				sa->sa_family);
+		ret = check_hostent_err(hp);
+		if (ret == 0) {
+			/* Name looked up successfully. */
+			ret = snprintf(node, nodelen, "%s", hp->h_name);
+			if (ret < 0 || (size_t)ret >= nodelen) {
+				return EAI_MEMORY;
+			}
+			if (flags & NI_NOFQDN) {
+				p = strchr(node,'.');
+				if (p) {
+					*p = '\0';
+				}
+			}
+			return 0;
+		}
+
+		if (flags & NI_NAMEREQD) {
+			/* If we require a name and didn't get one,
+			 * automatically fail. */
+			return ret;
+		}
+		/* Otherwise just fall into the numeric host code... */
+	}
+	p = inet_ntoa(((struct sockaddr_in *)sa)->sin_addr);
+	ret = snprintf(node, nodelen, "%s", p);
+	if (ret < 0 || (size_t)ret >= nodelen) {
+		return EAI_MEMORY;
+	}
+	return 0;
+}
+
+static int getservicenameinfo(const struct sockaddr *sa,
+			char *service,
+			size_t servicelen,
+			int flags)
+{
+	int ret = -1;
+	int port = ntohs(((struct sockaddr_in *)sa)->sin_port);
+
+	if (!(flags & NI_NUMERICSERV)) {
+		struct servent *se = getservbyport(
+				port,
+				(flags & NI_DGRAM) ? "udp" : "tcp");
+		if (se && se->s_name) {
+			/* Service name looked up successfully. */
+			ret = snprintf(service, servicelen, "%s", se->s_name);
+			if (ret < 0 || (size_t)ret >= servicelen) {
+				return EAI_MEMORY;
+			}
+			return 0;
+		}
+		/* Otherwise just fall into the numeric service code... */
+	}
+	ret = snprintf(service, servicelen, "%d", port);
+	if (ret < 0 || (size_t)ret >= servicelen) {
+		return EAI_MEMORY;
+	}
+	return 0;
+}
+
+/*
+ * Convert an ipv4 address to a hostname.
+ *
+ * Bugs:	- No IPv6 support.
+ */
+int getnameinfo(const struct sockaddr *sa, socklen_t salen,
+			char *node, size_t nodelen,
+			char *service, size_t servicelen, int flags)
+{
+
+	/* Invalid arguments. */
+	if (sa == NULL || (node == NULL && service == NULL)) {
+		return EAI_FAIL;
+	}
+
+	if (sa->sa_family != AF_INET) {
+		return EAI_FAIL;
+	}
+
+	if (salen < (socklen_t)sizeof (struct sockaddr_in)) {
+		return EAI_FAIL;
+	}
+
+	if (node) {
+		int ret = gethostnameinfo(sa, node, nodelen, flags);
+		if (ret)
+			return ret;
+	}
+
+	if (service) {
+		return getservicenameinfo(sa, service, servicelen, flags);
+	}
+	return 0;
+}

lib/getpass.c

@@ -0,0 +1,72 @@
+/*
+ * An implementation of getpass for systems that lack one.
+ *
+ * Copyright (C) 2013 Roman Donchenko
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <termios.h>
+
+#include "rsync.h"
+
+char *getpass(const char *prompt)
+{
+	static char password[256];
+
+	BOOL tty_changed = False, read_success;
+	struct termios tty_old, tty_new;
+	FILE *in = stdin, *out = stderr;
+	FILE *tty = fopen("/dev/tty", "w+");
+
+	if (tty)
+		in = out = tty;
+
+	if (tcgetattr(fileno(in), &tty_old) == 0) {
+		tty_new = tty_old;
+		tty_new.c_lflag &= ~(ECHO | ISIG);
+
+		if (tcsetattr(fileno(in), TCSAFLUSH, &tty_new) == 0)
+			tty_changed = True;
+	}
+
+	if (!tty_changed)
+		fputs("(WARNING: will be visible) ", out);
+	fputs(prompt, out);
+	fflush(out);
+
+	read_success = fgets(password, sizeof password, in) != NULL;
+
+	/* Print the newline that hasn't been echoed. */
+	fputc('\n', out);
+
+	if (tty_changed)
+		tcsetattr(fileno(in), TCSAFLUSH, &tty_old);
+
+	if (tty)
+		fclose(tty);
+
+	if (read_success) {
+		/* Remove the trailing newline. */
+		size_t password_len = strlen(password);
+		if (password_len && password[password_len - 1] == '\n')
+			password[password_len - 1] = '\0';
+
+		return password;
+	}
+
+	return NULL;
+}

lib/md-defines.h

@@ -0,0 +1,37 @@
+/* Keep this simple so both C and ASM can use it */
+
+/* These allow something like CFLAGS=-DDISABLE_SHA512_DIGEST */
+#ifdef DISABLE_SHA256_DIGEST
+#undef SHA256_DIGEST_LENGTH
+#endif
+#ifdef DISABLE_SHA512_DIGEST
+#undef SHA512_DIGEST_LENGTH
+#endif
+
+#define MD4_DIGEST_LEN 16
+#define MD5_DIGEST_LEN 16
+#if defined SHA512_DIGEST_LENGTH
+#define MAX_DIGEST_LEN SHA512_DIGEST_LENGTH
+#elif defined SHA256_DIGEST_LENGTH
+#define MAX_DIGEST_LEN SHA256_DIGEST_LENGTH
+#elif defined SHA_DIGEST_LENGTH
+#define MAX_DIGEST_LEN SHA_DIGEST_LENGTH
+#else
+#define MAX_DIGEST_LEN MD5_DIGEST_LEN
+#endif
+
+#define CSUM_CHUNK 64
+
+#define CSUM_gone -1
+#define CSUM_NONE 0
+#define CSUM_MD4_ARCHAIC 1
+#define CSUM_MD4_BUSTED 2
+#define CSUM_MD4_OLD 3
+#define CSUM_MD4 4
+#define CSUM_MD5 5
+#define CSUM_XXH64 6
+#define CSUM_XXH3_64 7
+#define CSUM_XXH3_128 8
+#define CSUM_SHA1 9
+#define CSUM_SHA256 10
+#define CSUM_SHA512 11

lib/md5-asm-x86_64.S

@@ -0,0 +1,701 @@
+/*
+ * x86-64 optimized assembler MD5 implementation
+ *
+ * Author: Marc Bevand, 2004
+ *
+ * This code was placed in the public domain by the author. The original
+ * publication can be found at:
+ *
+ * https://www.zorinaq.com/papers/md5-amd64.html
+ */
+/*
+ * No modifications were made aside from changing the function and file names.
+ * The MD5_CTX structure as expected here (from OpenSSL) is binary compatible
+ * with the md_context used by rsync, for the fields accessed.
+ *
+ * Benchmarks (in MB/s)            C     ASM
+ * - Intel Atom D2700            302     334
+ * - Intel i7-7700hq             351     376
+ * - AMD ThreadRipper 2950x      728     784
+ *
+ * The original code was also incorporated into OpenSSL. It has since been
+ * modified there. Those changes have not been made here due to licensing
+ * incompatibilities. Benchmarks of those changes on the above CPUs did not
+ * show any significant difference in performance, though.
+ */
+
+#include "config.h"
+#include "md-defines.h"
+
+#ifdef USE_MD5_ASM /* { */
+
+#ifdef __APPLE__
+#define md5_process_asm _md5_process_asm
+#endif
+
+.text
+.align 16
+
+.globl md5_process_asm
+md5_process_asm:
+	push	%rbp
+	push	%rbx
+	push	%r12
+	push	%r13			# not really useful (r13 is unused)
+	push	%r14
+	push	%r15
+
+	# rdi = arg #1 (ctx, MD5_CTX pointer)
+	# rsi = arg #2 (ptr, data pointer)
+	# rdx = arg #3 (nbr, number of 16-word blocks to process)
+	mov	%rdi,		%rbp	# rbp = ctx
+	shl	$6,		%rdx	# rdx = nbr in bytes
+	lea	(%rsi,%rdx),	%rdi	# rdi = end
+	mov	0*4(%rbp),	%eax	# eax = ctx->A
+	mov	1*4(%rbp),	%ebx	# ebx = ctx->B
+	mov	2*4(%rbp),	%ecx	# ecx = ctx->C
+	mov	3*4(%rbp),	%edx	# edx = ctx->D
+	# end is 'rdi'
+	# ptr is 'rsi'
+	# A is 'eax'
+	# B is 'ebx'
+	# C is 'ecx'
+	# D is 'edx'
+
+	cmp	%rdi,		%rsi		# cmp end with ptr
+	je	1f				# jmp if ptr == end
+
+	# BEGIN of loop over 16-word blocks
+2:	# save old values of A, B, C, D
+	mov	%eax,		%r8d
+	mov	%ebx,		%r9d
+	mov	%ecx,		%r14d
+	mov	%edx,		%r15d
+ mov	0*4(%rsi),	%r10d		/* (NEXT STEP) X[0] */
+ mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	xor	%ecx,		%r11d		/* y ^ ... */
+	lea	-680876936(%eax,%r10d),%eax		/* Const + dst + ... */
+	and	%ebx,		%r11d		/* x & ... */
+	xor	%edx,		%r11d		/* z ^ ... */
+	mov	1*4(%rsi),%r10d		/* (NEXT STEP) X[1] */
+	add	%r11d,		%eax		/* dst += ... */
+	rol	$7,		%eax		/* dst <<< s */
+	mov	%ecx,		%r11d		/* (NEXT STEP) z' = %ecx */
+	add	%ebx,		%eax		/* dst += x */
+	xor	%ebx,		%r11d		/* y ^ ... */
+	lea	-389564586(%edx,%r10d),%edx		/* Const + dst + ... */
+	and	%eax,		%r11d		/* x & ... */
+	xor	%ecx,		%r11d		/* z ^ ... */
+	mov	2*4(%rsi),%r10d		/* (NEXT STEP) X[2] */
+	add	%r11d,		%edx		/* dst += ... */
+	rol	$12,		%edx		/* dst <<< s */
+	mov	%ebx,		%r11d		/* (NEXT STEP) z' = %ebx */
+	add	%eax,		%edx		/* dst += x */
+	xor	%eax,		%r11d		/* y ^ ... */
+	lea	606105819(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	and	%edx,		%r11d		/* x & ... */
+	xor	%ebx,		%r11d		/* z ^ ... */
+	mov	3*4(%rsi),%r10d		/* (NEXT STEP) X[3] */
+	add	%r11d,		%ecx		/* dst += ... */
+	rol	$17,		%ecx		/* dst <<< s */
+	mov	%eax,		%r11d		/* (NEXT STEP) z' = %eax */
+	add	%edx,		%ecx		/* dst += x */
+	xor	%edx,		%r11d		/* y ^ ... */
+	lea	-1044525330(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	and	%ecx,		%r11d		/* x & ... */
+	xor	%eax,		%r11d		/* z ^ ... */
+	mov	4*4(%rsi),%r10d		/* (NEXT STEP) X[4] */
+	add	%r11d,		%ebx		/* dst += ... */
+	rol	$22,		%ebx		/* dst <<< s */
+	mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	add	%ecx,		%ebx		/* dst += x */
+	xor	%ecx,		%r11d		/* y ^ ... */
+	lea	-176418897(%eax,%r10d),%eax		/* Const + dst + ... */
+	and	%ebx,		%r11d		/* x & ... */
+	xor	%edx,		%r11d		/* z ^ ... */
+	mov	5*4(%rsi),%r10d		/* (NEXT STEP) X[5] */
+	add	%r11d,		%eax		/* dst += ... */
+	rol	$7,		%eax		/* dst <<< s */
+	mov	%ecx,		%r11d		/* (NEXT STEP) z' = %ecx */
+	add	%ebx,		%eax		/* dst += x */
+	xor	%ebx,		%r11d		/* y ^ ... */
+	lea	1200080426(%edx,%r10d),%edx		/* Const + dst + ... */
+	and	%eax,		%r11d		/* x & ... */
+	xor	%ecx,		%r11d		/* z ^ ... */
+	mov	6*4(%rsi),%r10d		/* (NEXT STEP) X[6] */
+	add	%r11d,		%edx		/* dst += ... */
+	rol	$12,		%edx		/* dst <<< s */
+	mov	%ebx,		%r11d		/* (NEXT STEP) z' = %ebx */
+	add	%eax,		%edx		/* dst += x */
+	xor	%eax,		%r11d		/* y ^ ... */
+	lea	-1473231341(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	and	%edx,		%r11d		/* x & ... */
+	xor	%ebx,		%r11d		/* z ^ ... */
+	mov	7*4(%rsi),%r10d		/* (NEXT STEP) X[7] */
+	add	%r11d,		%ecx		/* dst += ... */
+	rol	$17,		%ecx		/* dst <<< s */
+	mov	%eax,		%r11d		/* (NEXT STEP) z' = %eax */
+	add	%edx,		%ecx		/* dst += x */
+	xor	%edx,		%r11d		/* y ^ ... */
+	lea	-45705983(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	and	%ecx,		%r11d		/* x & ... */
+	xor	%eax,		%r11d		/* z ^ ... */
+	mov	8*4(%rsi),%r10d		/* (NEXT STEP) X[8] */
+	add	%r11d,		%ebx		/* dst += ... */
+	rol	$22,		%ebx		/* dst <<< s */
+	mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	add	%ecx,		%ebx		/* dst += x */
+	xor	%ecx,		%r11d		/* y ^ ... */
+	lea	1770035416(%eax,%r10d),%eax		/* Const + dst + ... */
+	and	%ebx,		%r11d		/* x & ... */
+	xor	%edx,		%r11d		/* z ^ ... */
+	mov	9*4(%rsi),%r10d		/* (NEXT STEP) X[9] */
+	add	%r11d,		%eax		/* dst += ... */
+	rol	$7,		%eax		/* dst <<< s */
+	mov	%ecx,		%r11d		/* (NEXT STEP) z' = %ecx */
+	add	%ebx,		%eax		/* dst += x */
+	xor	%ebx,		%r11d		/* y ^ ... */
+	lea	-1958414417(%edx,%r10d),%edx		/* Const + dst + ... */
+	and	%eax,		%r11d		/* x & ... */
+	xor	%ecx,		%r11d		/* z ^ ... */
+	mov	10*4(%rsi),%r10d		/* (NEXT STEP) X[10] */
+	add	%r11d,		%edx		/* dst += ... */
+	rol	$12,		%edx		/* dst <<< s */
+	mov	%ebx,		%r11d		/* (NEXT STEP) z' = %ebx */
+	add	%eax,		%edx		/* dst += x */
+	xor	%eax,		%r11d		/* y ^ ... */
+	lea	-42063(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	and	%edx,		%r11d		/* x & ... */
+	xor	%ebx,		%r11d		/* z ^ ... */
+	mov	11*4(%rsi),%r10d		/* (NEXT STEP) X[11] */
+	add	%r11d,		%ecx		/* dst += ... */
+	rol	$17,		%ecx		/* dst <<< s */
+	mov	%eax,		%r11d		/* (NEXT STEP) z' = %eax */
+	add	%edx,		%ecx		/* dst += x */
+	xor	%edx,		%r11d		/* y ^ ... */
+	lea	-1990404162(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	and	%ecx,		%r11d		/* x & ... */
+	xor	%eax,		%r11d		/* z ^ ... */
+	mov	12*4(%rsi),%r10d		/* (NEXT STEP) X[12] */
+	add	%r11d,		%ebx		/* dst += ... */
+	rol	$22,		%ebx		/* dst <<< s */
+	mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	add	%ecx,		%ebx		/* dst += x */
+	xor	%ecx,		%r11d		/* y ^ ... */
+	lea	1804603682(%eax,%r10d),%eax		/* Const + dst + ... */
+	and	%ebx,		%r11d		/* x & ... */
+	xor	%edx,		%r11d		/* z ^ ... */
+	mov	13*4(%rsi),%r10d		/* (NEXT STEP) X[13] */
+	add	%r11d,		%eax		/* dst += ... */
+	rol	$7,		%eax		/* dst <<< s */
+	mov	%ecx,		%r11d		/* (NEXT STEP) z' = %ecx */
+	add	%ebx,		%eax		/* dst += x */
+	xor	%ebx,		%r11d		/* y ^ ... */
+	lea	-40341101(%edx,%r10d),%edx		/* Const + dst + ... */
+	and	%eax,		%r11d		/* x & ... */
+	xor	%ecx,		%r11d		/* z ^ ... */
+	mov	14*4(%rsi),%r10d		/* (NEXT STEP) X[14] */
+	add	%r11d,		%edx		/* dst += ... */
+	rol	$12,		%edx		/* dst <<< s */
+	mov	%ebx,		%r11d		/* (NEXT STEP) z' = %ebx */
+	add	%eax,		%edx		/* dst += x */
+	xor	%eax,		%r11d		/* y ^ ... */
+	lea	-1502002290(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	and	%edx,		%r11d		/* x & ... */
+	xor	%ebx,		%r11d		/* z ^ ... */
+	mov	15*4(%rsi),%r10d		/* (NEXT STEP) X[15] */
+	add	%r11d,		%ecx		/* dst += ... */
+	rol	$17,		%ecx		/* dst <<< s */
+	mov	%eax,		%r11d		/* (NEXT STEP) z' = %eax */
+	add	%edx,		%ecx		/* dst += x */
+	xor	%edx,		%r11d		/* y ^ ... */
+	lea	1236535329(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	and	%ecx,		%r11d		/* x & ... */
+	xor	%eax,		%r11d		/* z ^ ... */
+	mov	0*4(%rsi),%r10d		/* (NEXT STEP) X[0] */
+	add	%r11d,		%ebx		/* dst += ... */
+	rol	$22,		%ebx		/* dst <<< s */
+	mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	add	%ecx,		%ebx		/* dst += x */
+ mov	1*4(%rsi),	%r10d		/* (NEXT STEP) X[1] */
+ mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+ mov	%edx,		%r12d		/* (NEXT STEP) z' = %edx */
+	not	%r11d				/* not z */
+	lea	-165796510(%eax,%r10d),%eax		/* Const + dst + ... */
+	and	%ebx,		%r12d		/* x & z */
+	and	%ecx,		%r11d		/* y & (not z) */
+	mov	6*4(%rsi),%r10d		/* (NEXT STEP) X[6] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%ecx,		%r11d		/* (NEXT STEP) z' = %ecx */
+	add	%r12d,		%eax		/* dst += ... */
+	mov	%ecx,		%r12d		/* (NEXT STEP) z' = %ecx */
+	rol	$5,		%eax		/* dst <<< s */
+	add	%ebx,		%eax		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-1069501632(%edx,%r10d),%edx		/* Const + dst + ... */
+	and	%eax,		%r12d		/* x & z */
+	and	%ebx,		%r11d		/* y & (not z) */
+	mov	11*4(%rsi),%r10d		/* (NEXT STEP) X[11] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%ebx,		%r11d		/* (NEXT STEP) z' = %ebx */
+	add	%r12d,		%edx		/* dst += ... */
+	mov	%ebx,		%r12d		/* (NEXT STEP) z' = %ebx */
+	rol	$9,		%edx		/* dst <<< s */
+	add	%eax,		%edx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	643717713(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	and	%edx,		%r12d		/* x & z */
+	and	%eax,		%r11d		/* y & (not z) */
+	mov	0*4(%rsi),%r10d		/* (NEXT STEP) X[0] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%eax,		%r11d		/* (NEXT STEP) z' = %eax */
+	add	%r12d,		%ecx		/* dst += ... */
+	mov	%eax,		%r12d		/* (NEXT STEP) z' = %eax */
+	rol	$14,		%ecx		/* dst <<< s */
+	add	%edx,		%ecx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-373897302(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	and	%ecx,		%r12d		/* x & z */
+	and	%edx,		%r11d		/* y & (not z) */
+	mov	5*4(%rsi),%r10d		/* (NEXT STEP) X[5] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	add	%r12d,		%ebx		/* dst += ... */
+	mov	%edx,		%r12d		/* (NEXT STEP) z' = %edx */
+	rol	$20,		%ebx		/* dst <<< s */
+	add	%ecx,		%ebx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-701558691(%eax,%r10d),%eax		/* Const + dst + ... */
+	and	%ebx,		%r12d		/* x & z */
+	and	%ecx,		%r11d		/* y & (not z) */
+	mov	10*4(%rsi),%r10d		/* (NEXT STEP) X[10] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%ecx,		%r11d		/* (NEXT STEP) z' = %ecx */
+	add	%r12d,		%eax		/* dst += ... */
+	mov	%ecx,		%r12d		/* (NEXT STEP) z' = %ecx */
+	rol	$5,		%eax		/* dst <<< s */
+	add	%ebx,		%eax		/* dst += x */
+	not	%r11d				/* not z */
+	lea	38016083(%edx,%r10d),%edx		/* Const + dst + ... */
+	and	%eax,		%r12d		/* x & z */
+	and	%ebx,		%r11d		/* y & (not z) */
+	mov	15*4(%rsi),%r10d		/* (NEXT STEP) X[15] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%ebx,		%r11d		/* (NEXT STEP) z' = %ebx */
+	add	%r12d,		%edx		/* dst += ... */
+	mov	%ebx,		%r12d		/* (NEXT STEP) z' = %ebx */
+	rol	$9,		%edx		/* dst <<< s */
+	add	%eax,		%edx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-660478335(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	and	%edx,		%r12d		/* x & z */
+	and	%eax,		%r11d		/* y & (not z) */
+	mov	4*4(%rsi),%r10d		/* (NEXT STEP) X[4] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%eax,		%r11d		/* (NEXT STEP) z' = %eax */
+	add	%r12d,		%ecx		/* dst += ... */
+	mov	%eax,		%r12d		/* (NEXT STEP) z' = %eax */
+	rol	$14,		%ecx		/* dst <<< s */
+	add	%edx,		%ecx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-405537848(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	and	%ecx,		%r12d		/* x & z */
+	and	%edx,		%r11d		/* y & (not z) */
+	mov	9*4(%rsi),%r10d		/* (NEXT STEP) X[9] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	add	%r12d,		%ebx		/* dst += ... */
+	mov	%edx,		%r12d		/* (NEXT STEP) z' = %edx */
+	rol	$20,		%ebx		/* dst <<< s */
+	add	%ecx,		%ebx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	568446438(%eax,%r10d),%eax		/* Const + dst + ... */
+	and	%ebx,		%r12d		/* x & z */
+	and	%ecx,		%r11d		/* y & (not z) */
+	mov	14*4(%rsi),%r10d		/* (NEXT STEP) X[14] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%ecx,		%r11d		/* (NEXT STEP) z' = %ecx */
+	add	%r12d,		%eax		/* dst += ... */
+	mov	%ecx,		%r12d		/* (NEXT STEP) z' = %ecx */
+	rol	$5,		%eax		/* dst <<< s */
+	add	%ebx,		%eax		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-1019803690(%edx,%r10d),%edx		/* Const + dst + ... */
+	and	%eax,		%r12d		/* x & z */
+	and	%ebx,		%r11d		/* y & (not z) */
+	mov	3*4(%rsi),%r10d		/* (NEXT STEP) X[3] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%ebx,		%r11d		/* (NEXT STEP) z' = %ebx */
+	add	%r12d,		%edx		/* dst += ... */
+	mov	%ebx,		%r12d		/* (NEXT STEP) z' = %ebx */
+	rol	$9,		%edx		/* dst <<< s */
+	add	%eax,		%edx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-187363961(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	and	%edx,		%r12d		/* x & z */
+	and	%eax,		%r11d		/* y & (not z) */
+	mov	8*4(%rsi),%r10d		/* (NEXT STEP) X[8] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%eax,		%r11d		/* (NEXT STEP) z' = %eax */
+	add	%r12d,		%ecx		/* dst += ... */
+	mov	%eax,		%r12d		/* (NEXT STEP) z' = %eax */
+	rol	$14,		%ecx		/* dst <<< s */
+	add	%edx,		%ecx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	1163531501(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	and	%ecx,		%r12d		/* x & z */
+	and	%edx,		%r11d		/* y & (not z) */
+	mov	13*4(%rsi),%r10d		/* (NEXT STEP) X[13] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	add	%r12d,		%ebx		/* dst += ... */
+	mov	%edx,		%r12d		/* (NEXT STEP) z' = %edx */
+	rol	$20,		%ebx		/* dst <<< s */
+	add	%ecx,		%ebx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-1444681467(%eax,%r10d),%eax		/* Const + dst + ... */
+	and	%ebx,		%r12d		/* x & z */
+	and	%ecx,		%r11d		/* y & (not z) */
+	mov	2*4(%rsi),%r10d		/* (NEXT STEP) X[2] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%ecx,		%r11d		/* (NEXT STEP) z' = %ecx */
+	add	%r12d,		%eax		/* dst += ... */
+	mov	%ecx,		%r12d		/* (NEXT STEP) z' = %ecx */
+	rol	$5,		%eax		/* dst <<< s */
+	add	%ebx,		%eax		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-51403784(%edx,%r10d),%edx		/* Const + dst + ... */
+	and	%eax,		%r12d		/* x & z */
+	and	%ebx,		%r11d		/* y & (not z) */
+	mov	7*4(%rsi),%r10d		/* (NEXT STEP) X[7] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%ebx,		%r11d		/* (NEXT STEP) z' = %ebx */
+	add	%r12d,		%edx		/* dst += ... */
+	mov	%ebx,		%r12d		/* (NEXT STEP) z' = %ebx */
+	rol	$9,		%edx		/* dst <<< s */
+	add	%eax,		%edx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	1735328473(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	and	%edx,		%r12d		/* x & z */
+	and	%eax,		%r11d		/* y & (not z) */
+	mov	12*4(%rsi),%r10d		/* (NEXT STEP) X[12] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%eax,		%r11d		/* (NEXT STEP) z' = %eax */
+	add	%r12d,		%ecx		/* dst += ... */
+	mov	%eax,		%r12d		/* (NEXT STEP) z' = %eax */
+	rol	$14,		%ecx		/* dst <<< s */
+	add	%edx,		%ecx		/* dst += x */
+	not	%r11d				/* not z */
+	lea	-1926607734(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	and	%ecx,		%r12d		/* x & z */
+	and	%edx,		%r11d		/* y & (not z) */
+	mov	0*4(%rsi),%r10d		/* (NEXT STEP) X[0] */
+	or	%r11d,		%r12d		/* (y & (not z)) | (x & z) */
+	mov	%edx,		%r11d		/* (NEXT STEP) z' = %edx */
+	add	%r12d,		%ebx		/* dst += ... */
+	mov	%edx,		%r12d		/* (NEXT STEP) z' = %edx */
+	rol	$20,		%ebx		/* dst <<< s */
+	add	%ecx,		%ebx		/* dst += x */
+ mov	5*4(%rsi),	%r10d		/* (NEXT STEP) X[5] */
+ mov	%ecx,		%r11d		/* (NEXT STEP) y' = %ecx */
+	lea	-378558(%eax,%r10d),%eax		/* Const + dst + ... */
+	mov	8*4(%rsi),%r10d		/* (NEXT STEP) X[8] */
+	xor	%edx,		%r11d		/* z ^ ... */
+	xor	%ebx,		%r11d		/* x ^ ... */
+	add	%r11d,		%eax		/* dst += ... */
+	rol	$4,		%eax		/* dst <<< s */
+	mov	%ebx,		%r11d		/* (NEXT STEP) y' = %ebx */
+	add	%ebx,		%eax		/* dst += x */
+	lea	-2022574463(%edx,%r10d),%edx		/* Const + dst + ... */
+	mov	11*4(%rsi),%r10d		/* (NEXT STEP) X[11] */
+	xor	%ecx,		%r11d		/* z ^ ... */
+	xor	%eax,		%r11d		/* x ^ ... */
+	add	%r11d,		%edx		/* dst += ... */
+	rol	$11,		%edx		/* dst <<< s */
+	mov	%eax,		%r11d		/* (NEXT STEP) y' = %eax */
+	add	%eax,		%edx		/* dst += x */
+	lea	1839030562(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	mov	14*4(%rsi),%r10d		/* (NEXT STEP) X[14] */
+	xor	%ebx,		%r11d		/* z ^ ... */
+	xor	%edx,		%r11d		/* x ^ ... */
+	add	%r11d,		%ecx		/* dst += ... */
+	rol	$16,		%ecx		/* dst <<< s */
+	mov	%edx,		%r11d		/* (NEXT STEP) y' = %edx */
+	add	%edx,		%ecx		/* dst += x */
+	lea	-35309556(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	mov	1*4(%rsi),%r10d		/* (NEXT STEP) X[1] */
+	xor	%eax,		%r11d		/* z ^ ... */
+	xor	%ecx,		%r11d		/* x ^ ... */
+	add	%r11d,		%ebx		/* dst += ... */
+	rol	$23,		%ebx		/* dst <<< s */
+	mov	%ecx,		%r11d		/* (NEXT STEP) y' = %ecx */
+	add	%ecx,		%ebx		/* dst += x */
+	lea	-1530992060(%eax,%r10d),%eax		/* Const + dst + ... */
+	mov	4*4(%rsi),%r10d		/* (NEXT STEP) X[4] */
+	xor	%edx,		%r11d		/* z ^ ... */
+	xor	%ebx,		%r11d		/* x ^ ... */
+	add	%r11d,		%eax		/* dst += ... */
+	rol	$4,		%eax		/* dst <<< s */
+	mov	%ebx,		%r11d		/* (NEXT STEP) y' = %ebx */
+	add	%ebx,		%eax		/* dst += x */
+	lea	1272893353(%edx,%r10d),%edx		/* Const + dst + ... */
+	mov	7*4(%rsi),%r10d		/* (NEXT STEP) X[7] */
+	xor	%ecx,		%r11d		/* z ^ ... */
+	xor	%eax,		%r11d		/* x ^ ... */
+	add	%r11d,		%edx		/* dst += ... */
+	rol	$11,		%edx		/* dst <<< s */
+	mov	%eax,		%r11d		/* (NEXT STEP) y' = %eax */
+	add	%eax,		%edx		/* dst += x */
+	lea	-155497632(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	mov	10*4(%rsi),%r10d		/* (NEXT STEP) X[10] */
+	xor	%ebx,		%r11d		/* z ^ ... */
+	xor	%edx,		%r11d		/* x ^ ... */
+	add	%r11d,		%ecx		/* dst += ... */
+	rol	$16,		%ecx		/* dst <<< s */
+	mov	%edx,		%r11d		/* (NEXT STEP) y' = %edx */
+	add	%edx,		%ecx		/* dst += x */
+	lea	-1094730640(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	mov	13*4(%rsi),%r10d		/* (NEXT STEP) X[13] */
+	xor	%eax,		%r11d		/* z ^ ... */
+	xor	%ecx,		%r11d		/* x ^ ... */
+	add	%r11d,		%ebx		/* dst += ... */
+	rol	$23,		%ebx		/* dst <<< s */
+	mov	%ecx,		%r11d		/* (NEXT STEP) y' = %ecx */
+	add	%ecx,		%ebx		/* dst += x */
+	lea	681279174(%eax,%r10d),%eax		/* Const + dst + ... */
+	mov	0*4(%rsi),%r10d		/* (NEXT STEP) X[0] */
+	xor	%edx,		%r11d		/* z ^ ... */
+	xor	%ebx,		%r11d		/* x ^ ... */
+	add	%r11d,		%eax		/* dst += ... */
+	rol	$4,		%eax		/* dst <<< s */
+	mov	%ebx,		%r11d		/* (NEXT STEP) y' = %ebx */
+	add	%ebx,		%eax		/* dst += x */
+	lea	-358537222(%edx,%r10d),%edx		/* Const + dst + ... */
+	mov	3*4(%rsi),%r10d		/* (NEXT STEP) X[3] */
+	xor	%ecx,		%r11d		/* z ^ ... */
+	xor	%eax,		%r11d		/* x ^ ... */
+	add	%r11d,		%edx		/* dst += ... */
+	rol	$11,		%edx		/* dst <<< s */
+	mov	%eax,		%r11d		/* (NEXT STEP) y' = %eax */
+	add	%eax,		%edx		/* dst += x */
+	lea	-722521979(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	mov	6*4(%rsi),%r10d		/* (NEXT STEP) X[6] */
+	xor	%ebx,		%r11d		/* z ^ ... */
+	xor	%edx,		%r11d		/* x ^ ... */
+	add	%r11d,		%ecx		/* dst += ... */
+	rol	$16,		%ecx		/* dst <<< s */
+	mov	%edx,		%r11d		/* (NEXT STEP) y' = %edx */
+	add	%edx,		%ecx		/* dst += x */
+	lea	76029189(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	mov	9*4(%rsi),%r10d		/* (NEXT STEP) X[9] */
+	xor	%eax,		%r11d		/* z ^ ... */
+	xor	%ecx,		%r11d		/* x ^ ... */
+	add	%r11d,		%ebx		/* dst += ... */
+	rol	$23,		%ebx		/* dst <<< s */
+	mov	%ecx,		%r11d		/* (NEXT STEP) y' = %ecx */
+	add	%ecx,		%ebx		/* dst += x */
+	lea	-640364487(%eax,%r10d),%eax		/* Const + dst + ... */
+	mov	12*4(%rsi),%r10d		/* (NEXT STEP) X[12] */
+	xor	%edx,		%r11d		/* z ^ ... */
+	xor	%ebx,		%r11d		/* x ^ ... */
+	add	%r11d,		%eax		/* dst += ... */
+	rol	$4,		%eax		/* dst <<< s */
+	mov	%ebx,		%r11d		/* (NEXT STEP) y' = %ebx */
+	add	%ebx,		%eax		/* dst += x */
+	lea	-421815835(%edx,%r10d),%edx		/* Const + dst + ... */
+	mov	15*4(%rsi),%r10d		/* (NEXT STEP) X[15] */
+	xor	%ecx,		%r11d		/* z ^ ... */
+	xor	%eax,		%r11d		/* x ^ ... */
+	add	%r11d,		%edx		/* dst += ... */
+	rol	$11,		%edx		/* dst <<< s */
+	mov	%eax,		%r11d		/* (NEXT STEP) y' = %eax */
+	add	%eax,		%edx		/* dst += x */
+	lea	530742520(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	mov	2*4(%rsi),%r10d		/* (NEXT STEP) X[2] */
+	xor	%ebx,		%r11d		/* z ^ ... */
+	xor	%edx,		%r11d		/* x ^ ... */
+	add	%r11d,		%ecx		/* dst += ... */
+	rol	$16,		%ecx		/* dst <<< s */
+	mov	%edx,		%r11d		/* (NEXT STEP) y' = %edx */
+	add	%edx,		%ecx		/* dst += x */
+	lea	-995338651(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	mov	0*4(%rsi),%r10d		/* (NEXT STEP) X[0] */
+	xor	%eax,		%r11d		/* z ^ ... */
+	xor	%ecx,		%r11d		/* x ^ ... */
+	add	%r11d,		%ebx		/* dst += ... */
+	rol	$23,		%ebx		/* dst <<< s */
+	mov	%ecx,		%r11d		/* (NEXT STEP) y' = %ecx */
+	add	%ecx,		%ebx		/* dst += x */
+ mov	0*4(%rsi),	%r10d		/* (NEXT STEP) X[0] */
+ mov	$0xffffffff,	%r11d
+ xor	%edx,		%r11d		/* (NEXT STEP) not z' = not %edx*/
+	lea	-198630844(%eax,%r10d),%eax		/* Const + dst + ... */
+	or	%ebx,		%r11d		/* x | ... */
+	xor	%ecx,		%r11d		/* y ^ ... */
+	add	%r11d,		%eax		/* dst += ... */
+	mov	7*4(%rsi),%r10d		/* (NEXT STEP) X[7] */
+	mov	$0xffffffff,	%r11d
+	rol	$6,		%eax		/* dst <<< s */
+	xor	%ecx,		%r11d		/* (NEXT STEP) not z' = not %ecx */
+	add	%ebx,		%eax		/* dst += x */
+	lea	1126891415(%edx,%r10d),%edx		/* Const + dst + ... */
+	or	%eax,		%r11d		/* x | ... */
+	xor	%ebx,		%r11d		/* y ^ ... */
+	add	%r11d,		%edx		/* dst += ... */
+	mov	14*4(%rsi),%r10d		/* (NEXT STEP) X[14] */
+	mov	$0xffffffff,	%r11d
+	rol	$10,		%edx		/* dst <<< s */
+	xor	%ebx,		%r11d		/* (NEXT STEP) not z' = not %ebx */
+	add	%eax,		%edx		/* dst += x */
+	lea	-1416354905(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	or	%edx,		%r11d		/* x | ... */
+	xor	%eax,		%r11d		/* y ^ ... */
+	add	%r11d,		%ecx		/* dst += ... */
+	mov	5*4(%rsi),%r10d		/* (NEXT STEP) X[5] */
+	mov	$0xffffffff,	%r11d
+	rol	$15,		%ecx		/* dst <<< s */
+	xor	%eax,		%r11d		/* (NEXT STEP) not z' = not %eax */
+	add	%edx,		%ecx		/* dst += x */
+	lea	-57434055(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	or	%ecx,		%r11d		/* x | ... */
+	xor	%edx,		%r11d		/* y ^ ... */
+	add	%r11d,		%ebx		/* dst += ... */
+	mov	12*4(%rsi),%r10d		/* (NEXT STEP) X[12] */
+	mov	$0xffffffff,	%r11d
+	rol	$21,		%ebx		/* dst <<< s */
+	xor	%edx,		%r11d		/* (NEXT STEP) not z' = not %edx */
+	add	%ecx,		%ebx		/* dst += x */
+	lea	1700485571(%eax,%r10d),%eax		/* Const + dst + ... */
+	or	%ebx,		%r11d		/* x | ... */
+	xor	%ecx,		%r11d		/* y ^ ... */
+	add	%r11d,		%eax		/* dst += ... */
+	mov	3*4(%rsi),%r10d		/* (NEXT STEP) X[3] */
+	mov	$0xffffffff,	%r11d
+	rol	$6,		%eax		/* dst <<< s */
+	xor	%ecx,		%r11d		/* (NEXT STEP) not z' = not %ecx */
+	add	%ebx,		%eax		/* dst += x */
+	lea	-1894986606(%edx,%r10d),%edx		/* Const + dst + ... */
+	or	%eax,		%r11d		/* x | ... */
+	xor	%ebx,		%r11d		/* y ^ ... */
+	add	%r11d,		%edx		/* dst += ... */
+	mov	10*4(%rsi),%r10d		/* (NEXT STEP) X[10] */
+	mov	$0xffffffff,	%r11d
+	rol	$10,		%edx		/* dst <<< s */
+	xor	%ebx,		%r11d		/* (NEXT STEP) not z' = not %ebx */
+	add	%eax,		%edx		/* dst += x */
+	lea	-1051523(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	or	%edx,		%r11d		/* x | ... */
+	xor	%eax,		%r11d		/* y ^ ... */
+	add	%r11d,		%ecx		/* dst += ... */
+	mov	1*4(%rsi),%r10d		/* (NEXT STEP) X[1] */
+	mov	$0xffffffff,	%r11d
+	rol	$15,		%ecx		/* dst <<< s */
+	xor	%eax,		%r11d		/* (NEXT STEP) not z' = not %eax */
+	add	%edx,		%ecx		/* dst += x */
+	lea	-2054922799(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	or	%ecx,		%r11d		/* x | ... */
+	xor	%edx,		%r11d		/* y ^ ... */
+	add	%r11d,		%ebx		/* dst += ... */
+	mov	8*4(%rsi),%r10d		/* (NEXT STEP) X[8] */
+	mov	$0xffffffff,	%r11d
+	rol	$21,		%ebx		/* dst <<< s */
+	xor	%edx,		%r11d		/* (NEXT STEP) not z' = not %edx */
+	add	%ecx,		%ebx		/* dst += x */
+	lea	1873313359(%eax,%r10d),%eax		/* Const + dst + ... */
+	or	%ebx,		%r11d		/* x | ... */
+	xor	%ecx,		%r11d		/* y ^ ... */
+	add	%r11d,		%eax		/* dst += ... */
+	mov	15*4(%rsi),%r10d		/* (NEXT STEP) X[15] */
+	mov	$0xffffffff,	%r11d
+	rol	$6,		%eax		/* dst <<< s */
+	xor	%ecx,		%r11d		/* (NEXT STEP) not z' = not %ecx */
+	add	%ebx,		%eax		/* dst += x */
+	lea	-30611744(%edx,%r10d),%edx		/* Const + dst + ... */
+	or	%eax,		%r11d		/* x | ... */
+	xor	%ebx,		%r11d		/* y ^ ... */
+	add	%r11d,		%edx		/* dst += ... */
+	mov	6*4(%rsi),%r10d		/* (NEXT STEP) X[6] */
+	mov	$0xffffffff,	%r11d
+	rol	$10,		%edx		/* dst <<< s */
+	xor	%ebx,		%r11d		/* (NEXT STEP) not z' = not %ebx */
+	add	%eax,		%edx		/* dst += x */
+	lea	-1560198380(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	or	%edx,		%r11d		/* x | ... */
+	xor	%eax,		%r11d		/* y ^ ... */
+	add	%r11d,		%ecx		/* dst += ... */
+	mov	13*4(%rsi),%r10d		/* (NEXT STEP) X[13] */
+	mov	$0xffffffff,	%r11d
+	rol	$15,		%ecx		/* dst <<< s */
+	xor	%eax,		%r11d		/* (NEXT STEP) not z' = not %eax */
+	add	%edx,		%ecx		/* dst += x */
+	lea	1309151649(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	or	%ecx,		%r11d		/* x | ... */
+	xor	%edx,		%r11d		/* y ^ ... */
+	add	%r11d,		%ebx		/* dst += ... */
+	mov	4*4(%rsi),%r10d		/* (NEXT STEP) X[4] */
+	mov	$0xffffffff,	%r11d
+	rol	$21,		%ebx		/* dst <<< s */
+	xor	%edx,		%r11d		/* (NEXT STEP) not z' = not %edx */
+	add	%ecx,		%ebx		/* dst += x */
+	lea	-145523070(%eax,%r10d),%eax		/* Const + dst + ... */
+	or	%ebx,		%r11d		/* x | ... */
+	xor	%ecx,		%r11d		/* y ^ ... */
+	add	%r11d,		%eax		/* dst += ... */
+	mov	11*4(%rsi),%r10d		/* (NEXT STEP) X[11] */
+	mov	$0xffffffff,	%r11d
+	rol	$6,		%eax		/* dst <<< s */
+	xor	%ecx,		%r11d		/* (NEXT STEP) not z' = not %ecx */
+	add	%ebx,		%eax		/* dst += x */
+	lea	-1120210379(%edx,%r10d),%edx		/* Const + dst + ... */
+	or	%eax,		%r11d		/* x | ... */
+	xor	%ebx,		%r11d		/* y ^ ... */
+	add	%r11d,		%edx		/* dst += ... */
+	mov	2*4(%rsi),%r10d		/* (NEXT STEP) X[2] */
+	mov	$0xffffffff,	%r11d
+	rol	$10,		%edx		/* dst <<< s */
+	xor	%ebx,		%r11d		/* (NEXT STEP) not z' = not %ebx */
+	add	%eax,		%edx		/* dst += x */
+	lea	718787259(%ecx,%r10d),%ecx		/* Const + dst + ... */
+	or	%edx,		%r11d		/* x | ... */
+	xor	%eax,		%r11d		/* y ^ ... */
+	add	%r11d,		%ecx		/* dst += ... */
+	mov	9*4(%rsi),%r10d		/* (NEXT STEP) X[9] */
+	mov	$0xffffffff,	%r11d
+	rol	$15,		%ecx		/* dst <<< s */
+	xor	%eax,		%r11d		/* (NEXT STEP) not z' = not %eax */
+	add	%edx,		%ecx		/* dst += x */
+	lea	-343485551(%ebx,%r10d),%ebx		/* Const + dst + ... */
+	or	%ecx,		%r11d		/* x | ... */
+	xor	%edx,		%r11d		/* y ^ ... */
+	add	%r11d,		%ebx		/* dst += ... */
+	mov	0*4(%rsi),%r10d		/* (NEXT STEP) X[0] */
+	mov	$0xffffffff,	%r11d
+	rol	$21,		%ebx		/* dst <<< s */
+	xor	%edx,		%r11d		/* (NEXT STEP) not z' = not %edx */
+	add	%ecx,		%ebx		/* dst += x */
+	# add old values of A, B, C, D
+	add	%r8d,	%eax
+	add	%r9d,	%ebx
+	add	%r14d,	%ecx
+	add	%r15d,	%edx
+
+	# loop control
+	add	$64,		%rsi		# ptr += 64
+	cmp	%rdi,		%rsi		# cmp end with ptr
+	jb	2b				# jmp if ptr < end
+	# END of loop over 16-word blocks
+1:
+	mov	%eax,		0*4(%rbp)	# ctx->A = A
+	mov	%ebx,		1*4(%rbp)	# ctx->B = B
+	mov	%ecx,		2*4(%rbp)	# ctx->C = C
+	mov	%edx,		3*4(%rbp)	# ctx->D = D
+
+	pop	%r15
+	pop	%r14
+	pop	%r13				# not really useful (r13 is unused)
+	pop	%r12
+	pop	%rbx
+	pop	%rbp
+	ret
+
+#endif /* } USE_MD5_ASM */

lib/md5.c

@@ -2,6 +2,7 @@
  * RFC 1321 compliant MD5 implementation
  *
  * Copyright (C) 2001-2003 Christophe Devine
+ * Copyright (C) 2007-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -38,22 +39,22 @@ static void md5_process(md_context *ctx, const uchar data[CSUM_CHUNK])
 	C = ctx->C;
 	D = ctx->D;
 
-	X[0] = IVAL(data, 0);
-	X[1] = IVAL(data, 4);
-	X[2] = IVAL(data, 8);
-	X[3] = IVAL(data, 12);
-	X[4] = IVAL(data, 16);
-	X[5] = IVAL(data, 20);
-	X[6] = IVAL(data, 24);
-	X[7] = IVAL(data, 28);
-	X[8] = IVAL(data, 32);
-	X[9] = IVAL(data, 36);
-	X[10] = IVAL(data, 40);
-	X[11] = IVAL(data, 44);
-	X[12] = IVAL(data, 48);
-	X[13] = IVAL(data, 52);
-	X[14] = IVAL(data, 56);
-	X[15] = IVAL(data, 60);
+	X[0] = IVALu(data, 0);
+	X[1] = IVALu(data, 4);
+	X[2] = IVALu(data, 8);
+	X[3] = IVALu(data, 12);
+	X[4] = IVALu(data, 16);
+	X[5] = IVALu(data, 20);
+	X[6] = IVALu(data, 24);
+	X[7] = IVALu(data, 28);
+	X[8] = IVALu(data, 32);
+	X[9] = IVALu(data, 36);
+	X[10] = IVALu(data, 40);
+	X[11] = IVALu(data, 44);
+	X[12] = IVALu(data, 48);
+	X[13] = IVALu(data, 52);
+	X[14] = IVALu(data, 56);
+	X[15] = IVALu(data, 60);
 
 #define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
 
@@ -146,6 +147,13 @@ static void md5_process(md_context *ctx, const uchar data[CSUM_CHUNK])
 	ctx->D += D;
 }
 
+#ifdef USE_MD5_ASM
+#if CSUM_CHUNK != 64
+#error The MD5 ASM code does not support CSUM_CHUNK != 64
+#endif
+extern void md5_process_asm(md_context *ctx, const void *data, size_t num);
+#endif
+
 void md5_update(md_context *ctx, const uchar *input, uint32 length)
 {
 	uint32 left, fill;
@@ -170,17 +178,26 @@ void md5_update(md_context *ctx, const uchar *input, uint32 length)
 		left = 0;
 	}
 
+#ifdef USE_MD5_ASM /* { */
+	if (length >= CSUM_CHUNK) {
+		uint32 chunks = length / CSUM_CHUNK;
+		md5_process_asm(ctx, input, chunks);
+		length -= chunks * CSUM_CHUNK;
+		input += chunks * CSUM_CHUNK;
+	}
+#else /* } { */
 	while (length >= CSUM_CHUNK) {
 		md5_process(ctx, input);
 		length -= CSUM_CHUNK;
 		input  += CSUM_CHUNK;
 	}
+#endif /* } */
 
 	if (length)
 		memcpy(ctx->buffer + left, input, length);
 }
 
-static uchar md5_padding[CSUM_CHUNK] = { 0x80 };
+static const uchar md5_padding[CSUM_CHUNK] = { 0x80 };
 
 void md5_result(md_context *ctx, uchar digest[MD5_DIGEST_LEN])
 {
@@ -192,8 +209,8 @@ void md5_result(md_context *ctx, uchar digest[MD5_DIGEST_LEN])
 	     | (ctx->totalN2 <<  3);
 	low  = (ctx->totalN <<  3);
 
-	SIVAL(msglen, 0, low);
-	SIVAL(msglen, 4, high);
+	SIVALu(msglen, 0, low);
+	SIVALu(msglen, 4, high);
 
 	last = ctx->totalN & 0x3F;
 	padn = last < 56 ? 56 - last : 120 - last;
@@ -201,12 +218,14 @@ void md5_result(md_context *ctx, uchar digest[MD5_DIGEST_LEN])
 	md5_update(ctx, md5_padding, padn);
 	md5_update(ctx, msglen, 8);
 
-	SIVAL(digest, 0, ctx->A);
-	SIVAL(digest, 4, ctx->B);
-	SIVAL(digest, 8, ctx->C);
-	SIVAL(digest, 12, ctx->D);
+	SIVALu(digest, 0, ctx->A);
+	SIVALu(digest, 4, ctx->B);
+	SIVALu(digest, 8, ctx->C);
+	SIVALu(digest, 12, ctx->D);
 }
 
+#ifdef TEST_MD5 /* { */
+
 void get_md5(uchar *out, const uchar *input, int n)
 {
 	md_context ctx;
@@ -215,8 +234,6 @@ void get_md5(uchar *out, const uchar *input, int n)
 	md5_result(&ctx, out);
 }
 
-#ifdef TEST_MD5
-
 #include <stdlib.h>
 #include <stdio.h>
 
@@ -301,4 +318,4 @@ int main(int argc, char *argv[])
 	return 0;
 }
 
-#endif
+#endif /* } */

lib/mdfour.c

@@ -4,7 +4,7 @@
  * An implementation of MD4 designed for use in the SMB authentication protocol.
  *
  * Copyright (C) 1997-1998 Andrew Tridgell
- * Copyright (C) 2005-2007 Wayne Davison
+ * Copyright (C) 2005-2020 Wayne Davison
  * 
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -193,6 +193,8 @@ void mdfour_result(md_context *md, uchar digest[MD4_DIGEST_LEN])
 	copy4(digest+12, m->D);
 }
 
+#ifdef TEST_MDFOUR
+
 void mdfour(uchar digest[MD4_DIGEST_LEN], uchar *in, int length)
 {
 	md_context md;
@@ -201,7 +203,6 @@ void mdfour(uchar digest[MD4_DIGEST_LEN], uchar *in, int length)
 	mdfour_result(&md, digest);
 }
 
-#ifdef TEST_MDFOUR
 int protocol_version = 28;
 
 static void file_checksum1(char *fname)

lib/mdigest.h

@@ -1,10 +1,10 @@
 /* The include file for both the MD4 and MD5 routines. */
 
-#define MD4_DIGEST_LEN 16
-#define MD5_DIGEST_LEN 16
-#define MAX_DIGEST_LEN MD5_DIGEST_LEN
-
-#define CSUM_CHUNK 64
+#ifdef USE_OPENSSL
+#include <openssl/sha.h>
+#include <openssl/evp.h>
+#endif
+#include "md-defines.h"
 
 typedef struct {
 	uint32 A, B, C, D;
@@ -17,10 +17,6 @@ void mdfour_begin(md_context *md);
 void mdfour_update(md_context *md, const uchar *in, uint32 length);
 void mdfour_result(md_context *md, uchar digest[MD4_DIGEST_LEN]);
 
-void get_mdfour(uchar digest[MD4_DIGEST_LEN], const uchar *in, int length);
-
 void md5_begin(md_context *ctx);
 void md5_update(md_context *ctx, const uchar *input, uint32 length);
 void md5_result(md_context *ctx, uchar digest[MD5_DIGEST_LEN]);
-
-void get_md5(uchar digest[MD5_DIGEST_LEN], const uchar *input, int n);

lib/permstring.c

@@ -4,7 +4,7 @@
  * Copyright (C) 1996 Andrew Tridgell
  * Copyright (C) 1996 Paul Mackerras
  * Copyright (C) 2001 Martin Pool <mbp@samba.org>
- * Copyright (C) 2003, 2006 Wayne Davison
+ * Copyright (C) 2003-2019 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

lib/pool_alloc.3

@@ -33,7 +33,7 @@ pool_alloc, pool_free, pool_free_old, pool_talloc, pool_tfree, pool_create, pool
 .SH SYNOPSIS
 .B #include "pool_alloc.h"
 
-\fBstruct alloc_pool *pool_create(size_t \fIsize\fB, size_t \fIquantum\fB, void (*\fIbomb\fB)(char *), int \fIflags\fB);
+\fBstruct alloc_pool *pool_create(size_t \fIsize\fB, size_t \fIquantum\fB, void (*\fIbomb\fB)(char*,char*,int), int \fIflags\fB);
 
 \fBvoid pool_destroy(struct alloc_pool *\fIpool\fB);
 
@@ -95,25 +95,39 @@ for
 .I quantum
 will produce a quantum that should meet maximal alignment
 on most platforms.
-If
-.B POOL_QALIGN
+Unless
+.B POOL_NO_QALIGN
 is set in the
 .IR flags ,
 allocations will be aligned to addresses that are a
 multiple of
 .IR quantum .
+A
+.B NULL
+may be specified for the
+.I bomb
+function pointer if it is not needed.  (See the
+.B pool_alloc()
+function for how it is used.)
 If
 .B POOL_CLEAR
 is set in the
 .IR flags ,
 all allocations from the pool will be initialized to zeros.
-You may specify a
-.B NULL
-for the
-.I bomb
-function pointer if you don't wish to use it.  (See the
-.B pool_alloc()
-function for how it is used.)
+If either
+.B POOL_PREPEND
+or
+.B POOL_INTERN
+is specified in the
+.IR flags ,
+each extent's data structure will be allocated at the start of the
+.IR size -length
+buffer (rather than as a separate, non-pool allocation), with the
+former extending the
+.I size
+to hold the structure, and the latter subtracting the structure's
+length from the indicated
+.IR size .
 .P
 .B pool_destroy()
 destroys an allocation
@@ -131,8 +145,8 @@ is
 .BR 0 ,
 .I quantum
 bytes will be allocated.
-If the pool has been created with
-.BR POOL_QALIGN ,
+If the pool has been created without
+.BR POOL_NO_QALIGN ,
 every chunk of memory that is returned will be suitably aligned.
 You can use this with the default
 .I quantum
@@ -169,7 +183,7 @@ an extent), its memory will be completely freed back to the system.
 If
 .I addr
 is
-.BR 0 ,
+.BR NULL ,
 no memory will be freed, but subsequent allocations will come
 from a new extent.
 .P

lib/pool_alloc.c

@@ -2,18 +2,19 @@
 
 #define POOL_DEF_EXTENT	(32 * 1024)
 
+#define POOL_QALIGN_P2		(1<<16)		/* power-of-2 qalign	*/
+
 struct alloc_pool
 {
 	size_t			size;		/* extent size		*/
 	size_t			quantum;	/* allocation quantum	*/
 	struct pool_extent	*extents;	/* top extent is "live" */
-	void			(*bomb)();	/* function to call if
-						 * malloc fails		*/
+	void			(*bomb)(const char*, const char*, int);	/* called if malloc fails */
 	int			flags;
 
 	/* statistical data */
 	unsigned long		e_created;	/* extents created	*/
-	unsigned long		e_freed;	/* extents detroyed	*/
+	unsigned long		e_freed;	/* extents destroyed	*/
 	int64			n_allocated;	/* calls to alloc	*/
 	int64			n_freed;	/* calls to free	*/
 	int64			b_allocated;	/* cum. bytes allocated	*/
@@ -22,16 +23,18 @@ struct alloc_pool
 
 struct pool_extent
 {
+	struct pool_extent	*next;
 	void			*start;		/* starting address	*/
 	size_t			free;		/* free bytecount	*/
-	size_t			bound;		/* bytes bound by padding,
-						 * overhead and freed	*/
-	struct pool_extent	*next;
+	size_t			bound;		/* trapped free bytes	*/
 };
 
 struct align_test {
-	void *foo;
-	int64 bar;
+	uchar foo;
+	union {
+	    int64 i;
+	    void *p;
+	} bar;
 };
 
 #define MINALIGN	offsetof(struct align_test, bar)
@@ -39,24 +42,47 @@ struct align_test {
 /* Temporarily cast a void* var into a char* var when adding an offset (to
  * keep some compilers from complaining about the pointer arithmetic). */
 #define PTR_ADD(b,o)	( (void*) ((char*)(b) + (o)) )
+#define PTR_SUB(b,o)	( (void*) ((char*)(b) - (o)) )
 
 alloc_pool_t
-pool_create(size_t size, size_t quantum, void (*bomb)(const char *), int flags)
+pool_create(size_t size, size_t quantum, void (*bomb)(const char*, const char*, int), int flags)
 {
-	struct alloc_pool	*pool;
+	struct alloc_pool *pool;
 
-	if (!(pool = new(struct alloc_pool)))
-		return pool;
-	memset(pool, 0, sizeof (struct alloc_pool));
-
-	pool->size = size	/* round extent size to min alignment reqs */
-	    ? (size + MINALIGN - 1) & ~(MINALIGN - 1)
-	    : POOL_DEF_EXTENT;
-	if (flags & POOL_INTERN) {
-		pool->size -= sizeof (struct pool_extent);
-		flags |= POOL_APPEND;
+	if ((MINALIGN & (MINALIGN - 1)) != (0)) {
+		if (bomb)
+			(*bomb)("Compiler error: MINALIGN is not a power of 2", __FILE__, __LINE__);
+		return NULL;
 	}
-	pool->quantum = quantum ? quantum : MINALIGN;
+
+	if (!(pool = new0(struct alloc_pool)))
+		return NULL;
+
+	if (!size)
+		size = POOL_DEF_EXTENT;
+	if (!quantum)
+		quantum = MINALIGN;
+
+	if (flags & POOL_INTERN) {
+		if (size <= sizeof (struct pool_extent))
+			size = quantum;
+		else
+			size -= sizeof (struct pool_extent);
+		flags |= POOL_PREPEND;
+	}
+
+	if (quantum <= 1)
+		flags = (flags | POOL_NO_QALIGN) & ~POOL_QALIGN_P2;
+	else if (!(flags & POOL_NO_QALIGN)) {
+		if (size % quantum)
+			size += quantum - size % quantum;
+		/* If quantum is a power of 2, we'll avoid using modulus. */
+		if (!(quantum & (quantum - 1)))
+			flags |= POOL_QALIGN_P2;
+	}
+
+	pool->size = size;
+	pool->quantum = quantum;
 	pool->bomb = bomb;
 	pool->flags = flags;
 
@@ -67,17 +93,21 @@ void
 pool_destroy(alloc_pool_t p)
 {
 	struct alloc_pool *pool = (struct alloc_pool *) p;
-	struct pool_extent	*cur, *next;
+	struct pool_extent *cur, *next;
 
 	if (!pool)
 		return;
 
 	for (cur = pool->extents; cur; cur = next) {
 		next = cur->next;
-		free(cur->start);
-		if (!(pool->flags & POOL_APPEND))
+		if (pool->flags & POOL_PREPEND)
+			free(PTR_SUB(cur->start, sizeof (struct pool_extent)));
+		else {
+			free(cur->start);
 			free(cur);
+		}
 	}
+
 	free(pool);
 }
 
@@ -90,45 +120,40 @@ pool_alloc(alloc_pool_t p, size_t len, const char *bomb_msg)
 
 	if (!len)
 		len = pool->quantum;
-	else if (pool->quantum > 1 && len % pool->quantum)
-		len += pool->quantum - len % pool->quantum;
+	else if (pool->flags & POOL_QALIGN_P2) {
+		if (len & (pool->quantum - 1))
+			len += pool->quantum - (len & (pool->quantum - 1));
+	} else if (!(pool->flags & POOL_NO_QALIGN)) {
+		if (len % pool->quantum)
+			len += pool->quantum - len % pool->quantum;
+	}
 
 	if (len > pool->size)
 		goto bomb_out;
 
 	if (!pool->extents || len > pool->extents->free) {
-		void	*start;
-		size_t	free;
-		size_t	bound;
-		size_t	skew;
-		size_t	asize;
+		void *start;
+		size_t asize;
 		struct pool_extent *ext;
 
-		free = pool->size;
-		bound = 0;
-
 		asize = pool->size;
-		if (pool->flags & POOL_APPEND)
+		if (pool->flags & POOL_PREPEND)
 			asize += sizeof (struct pool_extent);
 
 		if (!(start = new_array(char, asize)))
 			goto bomb_out;
 
 		if (pool->flags & POOL_CLEAR)
-			memset(start, 0, free);
+			memset(start, 0, asize);
 
-		if (pool->flags & POOL_APPEND)
-			ext = PTR_ADD(start, free);
-		else if (!(ext = new(struct pool_extent)))
+		if (pool->flags & POOL_PREPEND) {
+			ext = start;
+			start = PTR_ADD(start, sizeof (struct pool_extent));
+		} else if (!(ext = new(struct pool_extent)))
 			goto bomb_out;
-		if (pool->flags & POOL_QALIGN && pool->quantum > 1
-		    && (skew = (size_t)PTR_ADD(start, free) % pool->quantum)) {
-			bound  += skew;
-			free -= skew;
-		}
 		ext->start = start;
-		ext->free = free;
-		ext->bound = bound;
+		ext->free = pool->size;
+		ext->bound = 0;
 		ext->next = pool->extents;
 		pool->extents = ext;
 
@@ -144,7 +169,7 @@ pool_alloc(alloc_pool_t p, size_t len, const char *bomb_msg)
 
   bomb_out:
 	if (pool->bomb)
-		(*pool->bomb)(bomb_msg);
+		(*pool->bomb)(bomb_msg, __FILE__, __LINE__);
 	return NULL;
 }
 
@@ -160,10 +185,24 @@ pool_free(alloc_pool_t p, size_t len, void *addr)
 	if (!pool)
 		return;
 
+	if (!addr) {
+		/* A NULL addr starts a fresh extent for new allocations. */
+		if ((cur = pool->extents) != NULL && cur->free != pool->size) {
+			cur->bound += cur->free;
+			cur->free = 0;
+		}
+		return;
+	}
+
 	if (!len)
 		len = pool->quantum;
-	else if (pool->quantum > 1 && len % pool->quantum)
-		len += pool->quantum - len % pool->quantum;
+	else if (pool->flags & POOL_QALIGN_P2) {
+		if (len & (pool->quantum - 1))
+			len += pool->quantum - (len & (pool->quantum - 1));
+	} else if (!(pool->flags & POOL_NO_QALIGN)) {
+		if (len % pool->quantum)
+			len += pool->quantum - len % pool->quantum;
+	}
 
 	pool->n_freed++;
 	pool->b_freed += len;
@@ -179,19 +218,12 @@ pool_free(alloc_pool_t p, size_t len, void *addr)
 	if (!prev) {
 		/* The "live" extent is kept ready for more allocations. */
 		if (cur->free + cur->bound + len >= pool->size) {
-			size_t skew;
-
 			if (pool->flags & POOL_CLEAR) {
 				memset(PTR_ADD(cur->start, cur->free), 0,
 				       pool->size - cur->free);
 			}
 			cur->free = pool->size;
 			cur->bound = 0;
-			if (pool->flags & POOL_QALIGN && pool->quantum > 1
-			    && (skew = (size_t)PTR_ADD(cur->start, cur->free) % pool->quantum)) {
-				cur->bound += skew;
-				cur->free -= skew;
-			}
 		} else if (addr == PTR_ADD(cur->start, cur->free)) {
 			if (pool->flags & POOL_CLEAR)
 				memset(addr, 0, len);
@@ -203,9 +235,12 @@ pool_free(alloc_pool_t p, size_t len, void *addr)
 
 		if (cur->free + cur->bound >= pool->size) {
 			prev->next = cur->next;
-			free(cur->start);
-			if (!(pool->flags & POOL_APPEND))
+			if (pool->flags & POOL_PREPEND)
+				free(PTR_SUB(cur->start, sizeof (struct pool_extent)));
+			else {
+				free(cur->start);
 				free(cur);
+			}
 			pool->e_freed++;
 		} else if (prev != pool->extents) {
 			/* Move the extent to be the first non-live extent. */
@@ -242,18 +277,11 @@ pool_free_old(alloc_pool_t p, void *addr)
 			prev->next = NULL;
 			next = cur;
 		} else {
-			size_t skew;
-
 			/* The most recent live extent can just be reset. */
 			if (pool->flags & POOL_CLEAR)
 				memset(addr, 0, pool->size - cur->free);
 			cur->free = pool->size;
 			cur->bound = 0;
-			if (pool->flags & POOL_QALIGN && pool->quantum > 1
-			    && (skew = (size_t)PTR_ADD(cur->start, cur->free) % pool->quantum)) {
-				cur->bound += skew;
-				cur->free -= skew;
-			}
 			next = cur->next;
 			cur->next = NULL;
 		}
@@ -264,9 +292,12 @@ pool_free_old(alloc_pool_t p, void *addr)
 
 	while ((cur = next) != NULL) {
 		next = cur->next;
-		free(cur->start);
-		if (!(pool->flags & POOL_APPEND))
+		if (pool->flags & POOL_PREPEND)
+			free(PTR_SUB(cur->start, sizeof (struct pool_extent)));
+		else {
+			free(cur->start);
 			free(cur);
+		}
 		pool->e_freed++;
 	}
 }
@@ -295,24 +326,30 @@ pool_boundary(alloc_pool_t p, size_t len)
 }
 
 #define FDPRINT(label, value) \
-	snprintf(buf, sizeof buf, label, value), \
-	write(fd, buf, strlen(buf))
+	do { \
+		int len = snprintf(buf, sizeof buf, label, value); \
+		if (write(fd, buf, len) != len) \
+			ret = -1; \
+	} while (0)
 
 #define FDEXTSTAT(ext) \
-	snprintf(buf, sizeof buf, "  %12ld  %5ld\n", \
-		(long) ext->free, \
-		(long) ext->bound), \
-	write(fd, buf, strlen(buf))
+	do { \
+		int len = snprintf(buf, sizeof buf, "  %12ld  %5ld\n", \
+				   (long)ext->free, (long)ext->bound); \
+		if (write(fd, buf, len) != len) \
+			ret = -1; \
+	} while (0)
 
-void
+int
 pool_stats(alloc_pool_t p, int fd, int summarize)
 {
 	struct alloc_pool *pool = (struct alloc_pool *) p;
-	struct pool_extent	*cur;
+	struct pool_extent *cur;
 	char buf[BUFSIZ];
+	int ret = 0;
 
 	if (!pool)
-		return;
+		return ret;
 
 	FDPRINT("  Extent size:       %12ld\n",	(long)	pool->size);
 	FDPRINT("  Alloc quantum:     %12ld\n",	(long)	pool->quantum);
@@ -324,13 +361,16 @@ pool_stats(alloc_pool_t p, int fd, int summarize)
 	FDPRINT("  Bytes freed:       %12.0f\n", (double) pool->b_freed);
 
 	if (summarize)
-		return;
+		return ret;
 
 	if (!pool->extents)
-		return;
+		return ret;
 
-	write(fd, "\n", 1);
+	if (write(fd, "\n", 1) != 1)
+		ret = -1;
 
 	for (cur = pool->extents; cur; cur = cur->next)
 		FDEXTSTAT(cur);
+
+	return ret;
 }

lib/pool_alloc.h

@@ -1,13 +1,13 @@
 #include <stddef.h>
 
 #define POOL_CLEAR	(1<<0)		/* zero fill allocations	*/
-#define POOL_QALIGN	(1<<1)		/* align data to quanta		*/
+#define POOL_NO_QALIGN	(1<<1)		/* don't align data to quanta	*/
 #define POOL_INTERN	(1<<2)		/* Allocate extent structures	*/
-#define POOL_APPEND	(1<<3)		/*   or appended to extent data	*/
+#define POOL_PREPEND	(1<<3)		/*   or prepend to extent data	*/
 
 typedef void *alloc_pool_t;
 
-alloc_pool_t pool_create(size_t size, size_t quantum, void (*bomb)(const char *), int flags);
+alloc_pool_t pool_create(size_t size, size_t quantum, void (*bomb)(const char*, const char*, int), int flags);
 void pool_destroy(alloc_pool_t pool);
 void *pool_alloc(alloc_pool_t pool, size_t size, const char *bomb_msg);
 void pool_free(alloc_pool_t pool, size_t size, void *addr);

lib/sysacls.h

@@ -3,6 +3,7 @@
  * Version 2.2.x
  * Portable SMB ACL interface
  * Copyright (C) Jeremy Allison 2000
+ * Copyright (C) 2007-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -138,7 +139,9 @@ typedef struct acl *SMB_ACL_ENTRY_T;
 
 /* Based on the Solaris & UnixWare code. */
 
+#ifndef __TANDEM
 #undef GROUP
+#endif
 #include <sys/aclv.h>
 
 /* SVR4.2 ES/MP ACLs */
@@ -229,7 +232,7 @@ struct new_acl_entry{
 
 #define SMB_ACL_ENTRY_T		struct new_acl_entry*
 #define SMB_ACL_T		struct acl_entry_link*
- 
+
 #define SMB_ACL_TAG_T		unsigned short
 #define SMB_ACL_TYPE_T		int
 

lib/sysxattrs.c

@@ -2,6 +2,7 @@
  * Extended attribute support for rsync.
  *
  * Copyright (C) 2004 Red Hat, Inc.
+ * Copyright (C) 2003-2022 Wayne Davison
  * Written by Jay Fenlason.
  *
  * This program is free software; you can redistribute it and/or modify
@@ -23,6 +24,10 @@
 
 #ifdef SUPPORT_XATTRS
 
+#ifdef HAVE_OSX_XATTRS
+#define GETXATTR_FETCH_LIMIT (64*1024*1024)
+#endif
+
 #if defined HAVE_LINUX_XATTRS
 
 ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
@@ -54,7 +59,24 @@ ssize_t sys_llistxattr(const char *path, char *list, size_t size)
 
 ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
 {
-	return getxattr(path, name, value, size, 0, XATTR_NOFOLLOW);
+	ssize_t len = getxattr(path, name, value, size, 0, XATTR_NOFOLLOW);
+
+	/* If we're retrieving data, handle resource forks > 64MB specially */
+	if (value != NULL && len == GETXATTR_FETCH_LIMIT && (size_t)len < size) {
+		/* getxattr will only return 64MB of data at a time, need to call again with a new offset */
+		u_int32_t offset = len;
+		size_t data_retrieved = len;
+		while (data_retrieved < size) {
+			len = getxattr(path, name, (char*)value + offset, size - data_retrieved, offset, XATTR_NOFOLLOW);
+			if (len <= 0)
+				break;
+			data_retrieved += len;
+			offset += (u_int32_t)len;
+		}
+		len = data_retrieved;
+	}
+
+	return len;
 }
 
 ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
@@ -104,9 +126,18 @@ ssize_t sys_llistxattr(const char *path, char *list, size_t size)
 	unsigned char keylen;
 	ssize_t off, len = extattr_list_link(path, EXTATTR_NAMESPACE_USER, list, size);
 
-	if (len <= 0 || (size_t)len > size)
+	if (len <= 0 || size == 0)
 		return len;
 
+	if ((size_t)len >= size) {
+		/* FreeBSD extattr_list_xx() returns 'size' as 'len' in case there are                                                              
+                   more data available, truncating the output, we solve this by signalling                                                          
+                   ERANGE in case len == size so that the code in xattrs.c will retry with                                                          
+                   a bigger buffer */
+		errno = ERANGE;
+		return -1;
+	}
+
 	/* FreeBSD puts a single-byte length before each string, with no '\0'
 	 * terminator.  We need to change this into a series of null-terminted
 	 * strings.  Since the size is the same, we can simply transform the
@@ -114,7 +145,7 @@ ssize_t sys_llistxattr(const char *path, char *list, size_t size)
 	for (off = 0; off < len; off += keylen + 1) {
 		keylen = ((unsigned char*)list)[off];
 		if (off + keylen >= len) {
-			/* Should be impossible, but kernel bugs happen! */
+			/* Should be impossible, but bugs happen! */
 			errno = EINVAL;
 			return -1;
 		}
@@ -125,6 +156,151 @@ ssize_t sys_llistxattr(const char *path, char *list, size_t size)
 	return len;
 }
 
+#elif HAVE_SOLARIS_XATTRS
+
+static ssize_t read_xattr(int attrfd, void *buf, size_t buflen)
+{
+	STRUCT_STAT sb;
+	ssize_t ret;
+
+	if (fstat(attrfd, &sb) < 0)
+		ret = -1;
+	else if (sb.st_size > SSIZE_MAX) {
+		errno = ERANGE;
+		ret = -1;
+	} else if (buflen == 0)
+		ret = sb.st_size;
+	else if (sb.st_size > buflen) {
+		errno = ERANGE;
+		ret = -1;
+	} else {
+		size_t bufpos;
+		for (bufpos = 0; bufpos < sb.st_size; ) {
+			ssize_t cnt = read(attrfd, (char*)buf + bufpos, sb.st_size - bufpos);
+			if (cnt <= 0) {
+				if (cnt < 0 && errno == EINTR)
+					continue;
+				bufpos = -1;
+				break;
+			}
+			bufpos += cnt;
+		}
+		ret = bufpos;
+	}
+
+	close(attrfd);
+
+	return ret;
+}
+
+ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size)
+{
+	int attrfd;
+
+	if ((attrfd = attropen(path, name, O_RDONLY)) < 0) {
+		errno = ENOATTR;
+		return -1;
+	}
+
+	return read_xattr(attrfd, value, size);
+}
+
+ssize_t sys_fgetxattr(int filedes, const char *name, void *value, size_t size)
+{
+	int attrfd;
+
+	if ((attrfd = openat(filedes, name, O_RDONLY|O_XATTR, 0)) < 0) {
+		errno = ENOATTR;
+		return -1;
+	}
+
+	return read_xattr(attrfd, value, size);
+}
+
+int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size)
+{
+	int attrfd;
+	size_t bufpos;
+	mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
+
+	if ((attrfd = attropen(path, name, O_CREAT|O_TRUNC|O_WRONLY, mode)) < 0)
+		return -1;
+
+	for (bufpos = 0; bufpos < size; ) {
+		ssize_t cnt = write(attrfd, (char*)value + bufpos, size);
+		if (cnt <= 0) {
+			if (cnt < 0 && errno == EINTR)
+				continue;
+			bufpos = -1;
+			break;
+		}
+		bufpos += cnt;
+	}
+
+	close(attrfd);
+
+	return bufpos > 0 ? 0 : -1;
+}
+
+int sys_lremovexattr(const char *path, const char *name)
+{
+	int attrdirfd;
+	int ret;
+
+	if ((attrdirfd = attropen(path, ".", O_RDONLY)) < 0)
+		return -1;
+
+	ret = unlinkat(attrdirfd, name, 0);
+
+	close(attrdirfd);
+
+	return ret;
+}
+
+ssize_t sys_llistxattr(const char *path, char *list, size_t size)
+{
+	int attrdirfd;
+	DIR *dirp;
+	struct dirent *dp;
+	ssize_t ret = 0;
+
+	if ((attrdirfd = attropen(path, ".", O_RDONLY)) < 0) {
+		errno = ENOTSUP;
+		return -1;
+	}
+
+	if ((dirp = fdopendir(attrdirfd)) == NULL) {
+		close(attrdirfd);
+		return -1;
+	}
+
+	while ((dp = readdir(dirp))) {
+		int len = strlen(dp->d_name);
+
+		if (dp->d_name[0] == '.' && (len == 1 || (len == 2 && dp->d_name[1] == '.')))
+			continue;
+		if (len == 11 && dp->d_name[0] == 'S' && strncmp(dp->d_name, "SUNWattr_r", 10) == 0
+		 && (dp->d_name[10] == 'o' || dp->d_name[10] == 'w'))
+			continue;
+
+		ret += len + 1;
+		if ((size_t)ret > size) {
+			if (size == 0)
+				continue;
+			ret = -1;
+			errno = ERANGE;
+			break;
+		}
+		memcpy(list, dp->d_name, len+1);
+		list += len+1;
+	}
+
+	closedir(dirp);
+	close(attrdirfd);
+
+	return ret;
+}
+
 #else
 
 #error You need to create xattr compatibility functions.

lib/sysxattrs.h

@@ -1,9 +1,9 @@
 #ifdef SUPPORT_XATTRS
 
-#if defined HAVE_ATTR_XATTR_H
-#include <attr/xattr.h>
-#elif defined HAVE_SYS_XATTR_H
+#if defined HAVE_SYS_XATTR_H
 #include <sys/xattr.h>
+#elif defined HAVE_ATTR_XATTR_H
+#include <attr/xattr.h>
 #elif defined HAVE_SYS_EXTATTR_H
 #include <sys/extattr.h>
 #endif

log.c

@@ -3,7 +3,7 @@
  *
  * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
  * Copyright (C) 2000-2001 Martin Pool <mbp@samba.org>
- * Copyright (C) 2003-2007 Wayne Davison
+ * Copyright (C) 2003-2022 Wayne Davison
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,9 +20,9 @@
  */
 
 #include "rsync.h"
-#include "ifuncs.h"
+#include "itypes.h"
+#include "inums.h"
 
-extern int verbose;
 extern int dry_run;
 extern int am_daemon;
 extern int am_server;
@@ -31,16 +31,18 @@ extern int am_generator;
 extern int local_server;
 extern int quiet;
 extern int module_id;
-extern int msg_fd_out;
 extern int allow_8bit_chars;
 extern int protocol_version;
-extern int preserve_times;
-extern int uid_ndx;
-extern int gid_ndx;
+extern int always_checksum;
+extern int preserve_mtimes;
+extern int msgs2stderr;
 extern int stdout_format_has_i;
 extern int stdout_format_has_o_or_i;
 extern int logfile_format_has_i;
 extern int logfile_format_has_o_or_i;
+extern int receiver_symlink_times;
+extern int64 total_data_written;
+extern int64 total_data_read;
 extern mode_t orig_umask;
 extern char *auth_user;
 extern char *stdout_format;
@@ -50,22 +52,31 @@ extern char *logfile_name;
 extern iconv_t ic_chck;
 #endif
 #ifdef ICONV_OPTION
-extern iconv_t ic_send, ic_recv;
+extern iconv_t ic_recv;
 #endif
-extern char curr_dir[];
-extern char *module_dir;
+extern char curr_dir[MAXPATHLEN];
+extern char *full_module_path;
 extern unsigned int module_dirlen;
+extern char sender_file_sum[MAX_DIGEST_LEN];
+extern const char undetermined_hostname[];
+
+extern struct name_num_item *xfer_sum_nni, *file_sum_nni;
 
 static int log_initialised;
 static int logfile_was_closed;
 static FILE *logfile_fp;
 struct stats stats;
 
-int log_got_error = 0;
+int got_xfer_error = 0;
+int output_needs_newline = 0;
+int send_msgs_to_gen = 0;
+
+static int64 initial_data_written;
+static int64 initial_data_read;
 
 struct {
-        int code;
-        char const *name;
+	int code;
+	char const *name;
 } const rerr_names[] = {
 	{ RERR_SYNTAX     , "syntax or usage error" },
 	{ RERR_PROTOCOL   , "protocol incompatibility" },
@@ -83,14 +94,15 @@ struct {
 	{ RERR_SIGNAL     , "received SIGINT, SIGTERM, or SIGHUP" },
 	{ RERR_WAITCHILD  , "waitpid() failed" },
 	{ RERR_MALLOC     , "error allocating core memory buffers" },
-	{ RERR_PARTIAL    , "some files could not be transferred" },
+	{ RERR_PARTIAL    , "some files/attrs were not transferred (see previous errors)" },
 	{ RERR_VANISHED   , "some files vanished before they could be transferred" },
+	{ RERR_DEL_LIMIT  , "the --max-delete limit stopped deletions" },
 	{ RERR_TIMEOUT    , "timeout in data send/receive" },
+	{ RERR_CONTIMEOUT , "timeout waiting for daemon connection" },
 	{ RERR_CMD_FAILED , "remote shell failed" },
 	{ RERR_CMD_KILLED , "remote shell killed" },
 	{ RERR_CMD_RUN    , "remote command could not be run" },
 	{ RERR_CMD_NOTFOUND,"remote command not found" },
-	{ RERR_DEL_LIMIT  , "the --max-delete limit stopped deletions" },
 	{ 0, NULL }
 };
 
@@ -112,8 +124,7 @@ static void logit(int priority, const char *buf)
 	if (logfile_was_closed)
 		logfile_reopen();
 	if (logfile_fp) {
-		fprintf(logfile_fp, "%s [%d] %s",
-			timestring(time(NULL)), (int)getpid(), buf);
+		fprintf(logfile_fp, "%s [%d] %s", timestring(time(NULL)), (int)getpid(), buf);
 		fflush(logfile_fp);
 	} else {
 		syslog(priority, "%s", buf);
@@ -122,21 +133,16 @@ static void logit(int priority, const char *buf)
 
 static void syslog_init()
 {
-	static int been_here = 0;
 	int options = LOG_PID;
 
-	if (been_here)
-		return;
-	been_here = 1;
-
 #ifdef LOG_NDELAY
 	options |= LOG_NDELAY;
 #endif
 
 #ifdef LOG_DAEMON
-	openlog("rsyncd", options, lp_syslog_facility(module_id));
+	openlog(lp_syslog_tag(module_id), options, lp_syslog_facility(module_id));
 #else
-	openlog("rsyncd", options);
+	openlog(lp_syslog_tag(module_id), options);
 #endif
 
 #ifndef LOG_NDELAY
@@ -156,14 +162,16 @@ static void logfile_open(void)
 		rsyserr(FERROR, fopen_errno,
 			"failed to open log-file %s", logfile_name);
 		rprintf(FINFO, "Ignoring \"log file\" setting.\n");
+		logfile_name = "";
 	}
 }
 
 void log_init(int restart)
 {
 	if (log_initialised) {
-		if (!restart)
+		if (!restart) /* Note: a restart only happens with am_daemon */
 			return;
+		assert(logfile_name); /* all am_daemon procs got at least an empty string */
 		if (strcmp(logfile_name, lp_log_file(module_id)) != 0) {
 			if (logfile_fp) {
 				fclose(logfile_fp);
@@ -173,7 +181,8 @@ void log_init(int restart)
 			logfile_name = NULL;
 		} else if (*logfile_name)
 			return; /* unchanged, non-empty "log file" names */
-		else if (lp_syslog_facility(-1) != lp_syslog_facility(module_id))
+		else if (lp_syslog_facility(-1) != lp_syslog_facility(module_id)
+		      || strcmp(lp_syslog_tag(-1), lp_syslog_tag(module_id)) != 0)
 			closelog();
 		else
 			return; /* unchanged syslog settings */
@@ -195,6 +204,7 @@ void log_init(int restart)
 		syslog_init();
 }
 
+/* Note that this close & reopen idiom intentionally ignores syslog logging. */
 void logfile_close(void)
 {
 	if (logfile_fp) {
@@ -212,35 +222,36 @@ void logfile_reopen(void)
 	}
 }
 
-static void filtered_fwrite(FILE *f, const char *buf, int len, int use_isprint)
+static void filtered_fwrite(FILE *f, const char *in_buf, int in_len, int use_isprint, char end_char)
 {
-	const char *s, *end = buf + len;
-	for (s = buf; s < end; s++) {
-		if ((s < end - 4
-		  && *s == '\\' && s[1] == '#'
-		  && isDigit(s + 2)
-		  && isDigit(s + 3)
-		  && isDigit(s + 4))
-		 || (*s != '\t'
-		  && ((use_isprint && !isPrint(s))
-		   || *(uchar*)s < ' '))) {
-			if (s != buf && fwrite(buf, s - buf, 1, f) != 1)
+	char outbuf[1024], *ob = outbuf;
+	const char *end = in_buf + in_len;
+	while (in_buf < end) {
+		if (ob - outbuf >= (int)sizeof outbuf - 10) {
+			if (fwrite(outbuf, ob - outbuf, 1, f) != 1)
 				exit_cleanup(RERR_MESSAGEIO);
-			fprintf(f, "\\#%03o", *(uchar*)s);
-			buf = s + 1;
+			ob = outbuf;
 		}
+		if ((in_buf < end - 4 && *in_buf == '\\' && in_buf[1] == '#'
+		  && isDigit(in_buf + 2) && isDigit(in_buf + 3) && isDigit(in_buf + 4))
+		 || (*in_buf != '\t' && ((use_isprint && !isPrint(in_buf)) || *(uchar*)in_buf < ' ')))
+			ob += snprintf(ob, 6, "\\#%03o", *(uchar*)in_buf++);
+		else
+			*ob++ = *in_buf++;
 	}
-	if (buf != end && fwrite(buf, end - buf, 1, f) != 1)
+	if (end_char) /* The "- 10" above means that there is always room for one more char here. */
+		*ob++ = end_char;
+	if (ob != outbuf && fwrite(outbuf, ob - outbuf, 1, f) != 1)
 		exit_cleanup(RERR_MESSAGEIO);
 }
 
 /* this is the underlying (unformatted) rsync debugging function. Call
- * it with FINFO, FERROR or FLOG.  Note: recursion can happen with
- * certain fatal conditions. */
+ * it with FINFO, FERROR_*, FWARNING, FLOG, or FCLIENT.  Note: recursion
+ * can happen with certain fatal conditions. */
 void rwrite(enum logcode code, const char *buf, int len, int is_utf8)
 {
-	int trailing_CR_or_NL;
-	FILE *f = NULL;
+	char trailing_CR_or_NL;
+	FILE *f = msgs2stderr == 1 ? stderr : stdout;
 #ifdef ICONV_OPTION
 	iconv_t ic = is_utf8 && ic_recv != (iconv_t)-1 ? ic_recv : ic_chck;
 #else
@@ -252,22 +263,34 @@ void rwrite(enum logcode code, const char *buf, int len, int is_utf8)
 	if (len < 0)
 		exit_cleanup(RERR_MESSAGEIO);
 
-	if (am_server && msg_fd_out >= 0) {
+	if (msgs2stderr == 1) {
+		/* A normal daemon can get msgs2stderr set if the socket is busted, so we
+		 * change the message destination into an FLOG message in order to try to
+		 * get some info about an abnormal-exit into the log file. An rsh daemon
+		 * can have this set via user request, so we'll leave the code alone so
+		 * that the msg gets logged and then sent to stderr after that. */
+		if (am_daemon > 0 && code != FCLIENT)
+			code = FLOG;
+	} else if (send_msgs_to_gen) {
 		assert(!is_utf8);
-		/* Pass the message to our sibling. */
+		/* Pass the message to our sibling in native charset. */
 		send_msg((enum msgcode)code, buf, len, 0);
 		return;
 	}
 
-	if (code == FSOCKERR) /* This gets simplified for a non-sibling. */
+	if (code == FERROR_SOCKET) /* This gets simplified for a non-sibling. */
 		code = FERROR;
+	else if (code == FERROR_UTF8) {
+		is_utf8 = 1;
+		code = FERROR;
+	}
 
 	if (code == FCLIENT)
 		code = FINFO;
 	else if (am_daemon || logfile_name) {
 		static int in_block;
 		char msg[2048];
-		int priority = code == FERROR ? LOG_WARNING : LOG_INFO;
+		int priority = code == FINFO || code == FLOG ? LOG_INFO :  LOG_WARNING;
 
 		if (in_block)
 			return;
@@ -283,33 +306,57 @@ void rwrite(enum logcode code, const char *buf, int len, int is_utf8)
 	} else if (code == FLOG)
 		return;
 
-	if (quiet && code != FERROR)
-		return;
-
-	if (am_server) {
-		/* Pass the message to the non-server side. */
-		if (send_msg((enum msgcode)code, buf, len, !is_utf8))
-			return;
-		if (am_daemon) {
-			/* TODO: can we send the error to the user somehow? */
-			return;
-		}
-	}
-
 	switch (code) {
+	case FERROR_XFER:
+		got_xfer_error = 1;
+		/* FALL THROUGH */
 	case FERROR:
-		log_got_error = 1;
+	case FWARNING:
 		f = stderr;
 		break;
 	case FINFO:
-		f = am_server ? stderr : stdout;
+		if (quiet)
+			return;
 		break;
+	/*case FLOG:*/
+	/*case FCLIENT:*/
+	/*case FERROR_UTF8:*/
+	/*case FERROR_SOCKET:*/
 	default:
+		fprintf(stderr, "Bad logcode in rwrite(): %d [%s]\n", (int)code, who_am_i());
 		exit_cleanup(RERR_MESSAGEIO);
 	}
 
-	trailing_CR_or_NL = len && (buf[len-1] == '\n' || buf[len-1] == '\r')
-			  ? buf[--len] : 0;
+	if (am_server && msgs2stderr != 1 && (msgs2stderr != 2 || f != stderr)) {
+		enum msgcode msg = (enum msgcode)code;
+		if (protocol_version < 30) {
+			if (msg == MSG_ERROR)
+				msg = MSG_ERROR_XFER;
+			else if (msg == MSG_WARNING)
+				msg = MSG_INFO;
+		}
+		/* Pass the message to the non-server side. */
+		if (send_msg(msg, buf, len, !is_utf8))
+			return;
+		if (am_daemon > 0) {
+			/* TODO: can we send the error to the user somehow? */
+			return;
+		}
+		f = stderr;
+	}
+
+	if (output_needs_newline) {
+		fputc('\n', f);
+		output_needs_newline = 0;
+	}
+
+	trailing_CR_or_NL = len && (buf[len-1] == '\n' || buf[len-1] == '\r') ? buf[--len] : '\0';
+
+	if (len && buf[0] == '\r') {
+		fputc('\r', f);
+		buf++;
+		len--;
+	}
 
 #ifdef ICONV_CONST
 	if (ic != (iconv_t)-1) {
@@ -318,32 +365,44 @@ void rwrite(enum logcode code, const char *buf, int len, int is_utf8)
 		int ierrno;
 
 		INIT_CONST_XBUF(outbuf, convbuf);
-		INIT_XBUF(inbuf, (char*)buf, len, -1);
+		INIT_XBUF(inbuf, (char*)buf, len, (size_t)-1);
 
 		while (inbuf.len) {
-			iconvbufs(ic, &inbuf, &outbuf, 0);
+			iconvbufs(ic, &inbuf, &outbuf, inbuf.pos ? 0 : ICB_INIT);
 			ierrno = errno;
 			if (outbuf.len) {
-				filtered_fwrite(f, convbuf, outbuf.len, 0);
+				char trailing = inbuf.len ? '\0' : trailing_CR_or_NL;
+				filtered_fwrite(f, convbuf, outbuf.len, 0, trailing);
+				if (trailing) {
+					trailing_CR_or_NL = '\0';
+					fflush(f);
+				}
 				outbuf.len = 0;
 			}
-			if (!ierrno || ierrno == E2BIG)
-				continue;
-			fprintf(f, "\\#%03o", CVAL(inbuf.buf, inbuf.pos++));
-			inbuf.len--;
+			/* Log one byte of illegal/incomplete sequence and continue with
+			 * the next character. Check that the buffer is non-empty for the
+			 * sake of robustness. */
+			if ((ierrno == EILSEQ || ierrno == EINVAL) && inbuf.len) {
+				fprintf(f, "\\#%03o", CVAL(inbuf.buf, inbuf.pos++));
+				inbuf.len--;
+			}
+		}
+
+		if (trailing_CR_or_NL) {
+			fputc(trailing_CR_or_NL, f);
+			fflush(f);
 		}
 	} else
 #endif
-		filtered_fwrite(f, buf, len, !allow_8bit_chars);
-
-	if (trailing_CR_or_NL) {
-		fputc(trailing_CR_or_NL, f);
-		fflush(f);
+	{
+		filtered_fwrite(f, buf, len, !allow_8bit_chars, trailing_CR_or_NL);
+		if (trailing_CR_or_NL)
+			fflush(f);
 	}
 }
 
-/* This is the rsync debugging function. Call it with FINFO, FERROR or
- * FLOG. */
+/* This is the rsync debugging function. Call it with FINFO, FERROR_*,
+ * FWARNING, FLOG, or FCLIENT. */
 void rprintf(enum logcode code, const char *format, ...)
 {
 	va_list ap;
@@ -397,12 +456,17 @@ void rsyserr(enum logcode code, int errcode, const char *format, ...)
 	char buf[BIGPATHBUFLEN];
 	size_t len;
 
-	strlcpy(buf, RSYNC_NAME ": ", sizeof buf);
-	len = (sizeof RSYNC_NAME ": ") - 1;
+	/* snprintf returns the would-have-been length on truncation, so
+	 * each cumulative call must be guarded; if not, sizeof buf - len
+	 * can underflow when promoted to size_t and the next call writes
+	 * past the buffer. */
+	len = snprintf(buf, sizeof buf, RSYNC_NAME ": [%s] ", who_am_i());
 
-	va_start(ap, format);
-	len += vsnprintf(buf + len, sizeof buf - len, format, ap);
-	va_end(ap);
+	if (len < sizeof buf) {
+		va_start(ap, format);
+		len += vsnprintf(buf + len, sizeof buf - len, format, ap);
+		va_end(ap);
+	}
 
 	if (len < sizeof buf) {
 		len += snprintf(buf + len, sizeof buf - len,
@@ -416,23 +480,28 @@ void rsyserr(enum logcode code, int errcode, const char *format, ...)
 
 void rflush(enum logcode code)
 {
-	FILE *f = NULL;
+	FILE *f;
 
 	if (am_daemon || code == FLOG)
 		return;
 
-	if (code == FERROR || am_server)
-		f = stderr;
-	else
+	if (!am_server && (code == FINFO || code == FCLIENT))
 		f = stdout;
+	else
+		f = stderr;
 
 	fflush(f);
 }
 
+void remember_initial_stats(void)
+{
+	initial_data_read = total_data_read;
+	initial_data_written = total_data_written;
+}
+
 /* A generic logging routine for send/recv, with parameter substitiution. */
 static void log_formatted(enum logcode code, const char *format, const char *op,
-			  struct file_struct *file, const char *fname,
-			  struct stats *initial_stats, int iflags,
+			  struct file_struct *file, const char *fname, int iflags,
 			  const char *hlink)
 {
 	char buf[MAXPATHLEN+1024], buf2[MAXPATHLEN], fmt[32];
@@ -455,30 +524,45 @@ static void log_formatted(enum logcode code, const char *format, const char *op,
 	buf[total] = '\0';
 
 	for (p = buf; (p = strchr(p, '%')) != NULL; ) {
+		int humanize = 0;
 		s = p++;
 		c = fmt + 1;
+		while (*p == '\'') {
+			humanize++;
+			p++;
+		}
 		if (*p == '-')
 			*c++ = *p++;
 		while (isDigit(p) && c - fmt < (int)(sizeof fmt) - 8)
 			*c++ = *p++;
+		while (*p == '\'') {
+			humanize++;
+			p++;
+		}
 		if (!*p)
 			break;
 		*c = '\0';
 		n = NULL;
 
+		/* Note for %h and %a: it doesn't matter what fd we pass to
+		 * client_{name,addr} because rsync_module will already have
+		 * forced the answer to be cached (assuming, of course, for %h
+		 * that lp_reverse_lookup(module_id) is true). */
 		switch (*p) {
 		case 'h':
-			if (am_daemon)
-				n = client_name(0);
+			if (am_daemon) {
+				n = lp_reverse_lookup(module_id)
+				  ? client_name(0) : undetermined_hostname;
+			}
 			break;
 		case 'a':
 			if (am_daemon)
 				n = client_addr(0);
 			break;
 		case 'l':
-			strlcat(fmt, ".0f", sizeof fmt);
+			strlcat(fmt, "s", sizeof fmt);
 			snprintf(buf2, sizeof buf2, fmt,
-				 (double)F_LENGTH(file));
+				 do_big_num(F_LENGTH(file), humanize, NULL));
 			n = buf2;
 			break;
 		case 'U':
@@ -498,14 +582,13 @@ static void log_formatted(enum logcode code, const char *format, const char *op,
 			}
 			break;
 		case 'p':
-			strlcat(fmt, "ld", sizeof fmt);
-			snprintf(buf2, sizeof buf2, fmt,
-				 (long)getpid());
+			strlcat(fmt, "d", sizeof fmt);
+			snprintf(buf2, sizeof buf2, fmt, (int)getpid());
 			n = buf2;
 			break;
 		case 'M':
 			n = c = timestring(file->modtime);
-			while ((c = strchr(p, ' ')) != NULL)
+			while ((c = strchr(c, ' ')) != NULL)
 				*c = '-';
 			break;
 		case 'B':
@@ -581,57 +664,71 @@ static void log_formatted(enum logcode code, const char *format, const char *op,
 			n = timestring(time(NULL));
 			break;
 		case 'P':
-			n = module_dir;
+			n = full_module_path;
 			break;
 		case 'u':
 			n = auth_user;
 			break;
 		case 'b':
-			if (am_sender) {
-				b = stats.total_written -
-					initial_stats->total_written;
-			} else {
-				b = stats.total_read -
-					initial_stats->total_read;
-			}
-			strlcat(fmt, ".0f", sizeof fmt);
-			snprintf(buf2, sizeof buf2, fmt, (double)b);
+		case 'c':
+			if (!(iflags & ITEM_TRANSFER))
+				b = 0;
+			else if ((!!am_sender) ^ (*p == 'c'))
+				b = total_data_written - initial_data_written;
+			else
+				b = total_data_read - initial_data_read;
+			strlcat(fmt, "s", sizeof fmt);
+			snprintf(buf2, sizeof buf2, fmt,
+				 do_big_num(b, humanize, NULL));
 			n = buf2;
 			break;
-		case 'c':
-			if (!am_sender) {
-				b = stats.total_written -
-					initial_stats->total_written;
-			} else {
-				b = stats.total_read -
-					initial_stats->total_read;
+		case 'C':
+			n = NULL;
+			if (S_ISREG(file->mode)) {
+				if (always_checksum)
+					n = sum_as_hex(file_sum_nni->num, F_SUM(file), 1);
+				else if (iflags & ITEM_TRANSFER)
+					n = sum_as_hex(xfer_sum_nni->num, sender_file_sum, 0);
+			}
+			if (!n) {
+				int sum_len = csum_len_for_type(always_checksum ? file_sum_nni->num : xfer_sum_nni->num,
+								always_checksum);
+				memset(buf2, ' ', sum_len*2);
+				buf2[sum_len*2] = '\0';
+				n = buf2;
 			}
-			strlcat(fmt, ".0f", sizeof fmt);
-			snprintf(buf2, sizeof buf2, fmt, (double)b);
-			n = buf2;
 			break;
 		case 'i':
 			if (iflags & ITEM_DELETED) {
-				n = "*deleting";
+				n = "*deleting  ";
 				break;
 			}
 			n  = c = buf2 + MAXPATHLEN - 32;
 			c[0] = iflags & ITEM_LOCAL_CHANGE
-			      ? iflags & ITEM_XNAME_FOLLOWS ? 'h' : 'c'
+			     ? iflags & ITEM_XNAME_FOLLOWS ? 'h' : 'c'
 			     : !(iflags & ITEM_TRANSFER) ? '.'
 			     : !local_server && *op == 's' ? '<' : '>';
-			c[1] = S_ISDIR(file->mode) ? 'd'
-			     : IS_SPECIAL(file->mode) ? 'S'
-			     : IS_DEVICE(file->mode) ? 'D'
-			     : S_ISLNK(file->mode) ? 'L' : 'f';
-			c[2] = !(iflags & ITEM_REPORT_CHECKSUM) ? '.' : 'c';
-			c[3] = !(iflags & ITEM_REPORT_SIZE) ? '.' : 's';
-			c[4] = !(iflags & ITEM_REPORT_TIME) ? '.'
-			     : !preserve_times || S_ISLNK(file->mode) ? 'T' : 't';
+			if (S_ISLNK(file->mode)) {
+				c[1] = 'L';
+				c[3] = '.';
+				c[4] = !(iflags & ITEM_REPORT_TIME) ? '.'
+				     : !preserve_mtimes || !receiver_symlink_times
+				    || (iflags & ITEM_REPORT_TIMEFAIL) ? 'T' : 't';
+			} else {
+				c[1] = S_ISDIR(file->mode) ? 'd'
+				     : IS_SPECIAL(file->mode) ? 'S'
+				     : IS_DEVICE(file->mode) ? 'D' : 'f';
+				c[3] = !(iflags & ITEM_REPORT_SIZE) ? '.' : 's';
+				c[4] = !(iflags & ITEM_REPORT_TIME) ? '.'
+				     : !preserve_mtimes ? 'T' : 't';
+			}
+			c[2] = !(iflags & ITEM_REPORT_CHANGE) ? '.' : 'c';
 			c[5] = !(iflags & ITEM_REPORT_PERMS) ? '.' : 'p';
 			c[6] = !(iflags & ITEM_REPORT_OWNER) ? '.' : 'o';
 			c[7] = !(iflags & ITEM_REPORT_GROUP) ? '.' : 'g';
-			c[8] = !(iflags & ITEM_REPORT_ATIME) ? '.' : 'u';
+			c[8] = !(iflags & (ITEM_REPORT_ATIME|ITEM_REPORT_CRTIME)) ? '.'
+			     : BITS_SET(iflags, ITEM_REPORT_ATIME|ITEM_REPORT_CRTIME) ? 'b'
+			     : iflags & ITEM_REPORT_ATIME ? 'u' : 'n';
 			c[9] = !(iflags & ITEM_REPORT_ACL) ? '.' : 'a';
 			c[10] = !(iflags & ITEM_REPORT_XATTR) ? '.' : 'x';
 			c[11] = '\0';
@@ -701,10 +798,12 @@ int log_format_has(const char *format, char esc)
 		return 0;
 
 	for (p = format; (p = strchr(p, '%')) != NULL; ) {
-		if (*++p == '-')
+		for (p++; *p == '\''; p++) {} /*SHARED ITERATOR*/
+		if (*p == '-')
 			p++;
 		while (isDigit(p))
 			p++;
+		while (*p == '\'') p++;
 		if (!*p)
 			break;
 		if (*p == esc)
@@ -716,67 +815,70 @@ int log_format_has(const char *format, char esc)
 /* Log the transfer of a file.  If the code is FCLIENT, the output just goes
  * to stdout.  If it is FLOG, it just goes to the log file.  Otherwise we
  * output to both. */
-void log_item(enum logcode code, struct file_struct *file,
-	      struct stats *initial_stats, int iflags, const char *hlink)
+void log_item(enum logcode code, struct file_struct *file, int iflags, const char *hlink)
 {
 	const char *s_or_r = am_sender ? "send" : "recv";
 
-	if (code != FLOG && stdout_format && !am_server) {
-		log_formatted(FCLIENT, stdout_format, s_or_r,
-			      file, NULL, initial_stats, iflags, hlink);
-	}
-	if (code != FCLIENT && logfile_format && *logfile_format) {
-		log_formatted(FLOG, logfile_format, s_or_r,
-			      file, NULL, initial_stats, iflags, hlink);
-	}
+	if (code != FLOG && stdout_format && !am_server)
+		log_formatted(FCLIENT, stdout_format, s_or_r, file, NULL, iflags, hlink);
+	if (code != FCLIENT && logfile_format && *logfile_format)
+		log_formatted(FLOG, logfile_format, s_or_r, file, NULL, iflags, hlink);
 }
 
-void maybe_log_item(struct file_struct *file, int iflags, int itemizing,
-		    const char *buf)
+void maybe_log_item(struct file_struct *file, int iflags, int itemizing, const char *buf)
 {
 	int significant_flags = iflags & SIGNIFICANT_ITEM_FLAGS;
 	int see_item = itemizing && (significant_flags || *buf
-		|| stdout_format_has_i > 1 || (verbose > 1 && stdout_format_has_i));
+		|| stdout_format_has_i > 1 || (INFO_GTE(NAME, 2) && stdout_format_has_i));
 	int local_change = iflags & ITEM_LOCAL_CHANGE && significant_flags;
 	if (am_server) {
 		if (logfile_name && !dry_run && see_item
 		 && (significant_flags || logfile_format_has_i))
-			log_item(FLOG, file, &stats, iflags, buf);
+			log_item(FLOG, file, iflags, buf);
 	} else if (see_item || local_change || *buf
 	    || (S_ISDIR(file->mode) && significant_flags)) {
 		enum logcode code = significant_flags || logfile_format_has_i ? FINFO : FCLIENT;
-		log_item(code, file, &stats, iflags, buf);
+		log_item(code, file, iflags, buf);
 	}
 }
 
 void log_delete(const char *fname, int mode)
 {
-	static struct {
-		union file_extras ex[4]; /* just in case... */
-		struct file_struct file;
-	} x;
+	static struct file_struct *file = NULL;
 	int len = strlen(fname);
 	const char *fmt;
 
-	x.file.mode = mode;
+	if (!file) {
+		int extra_len = (file_extra_cnt + 2) * EXTRA_LEN;
+		char *bp;
+#if EXTRA_ROUNDING > 0
+		if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
+			extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
+#endif
 
-	if (!verbose && !stdout_format)
-		;
-	else if (am_server && protocol_version >= 29 && len < MAXPATHLEN) {
+		bp = new_array0(char, FILE_STRUCT_LEN + extra_len + 1);
+		bp += extra_len;
+		file = (struct file_struct *)bp;
+	}
+
+	file->mode = mode;
+
+	if (am_server && protocol_version >= 29 && len < MAXPATHLEN) {
 		if (S_ISDIR(mode))
 			len++; /* directories include trailing null */
 		send_msg(MSG_DELETED, fname, len, am_generator);
-	} else {
+	} else if (!INFO_GTE(DEL, 1) && !stdout_format)
+		;
+	else {
 		fmt = stdout_format_has_o_or_i ? stdout_format : "deleting %n";
-		log_formatted(FCLIENT, fmt, "del.", &x.file, fname, &stats,
-			      ITEM_DELETED, NULL);
+		log_formatted(FCLIENT, fmt, "del.", file, fname, ITEM_DELETED, NULL);
 	}
 
 	if (!logfile_name || dry_run || !logfile_format)
 		return;
 
 	fmt = logfile_format_has_o_or_i ? logfile_format : "deleting %n";
-	log_formatted(FLOG, fmt, "del.", &x.file, fname, &stats, ITEM_DELETED, NULL);
+	log_formatted(FLOG, fmt, "del.", file, fname, ITEM_DELETED, NULL);
 }
 
 /*
@@ -787,12 +889,15 @@ void log_delete(const char *fname, int mode)
  */
 void log_exit(int code, const char *file, int line)
 {
-	if (code == 0) {
-		rprintf(FLOG,"sent %.0f bytes  received %.0f bytes  total size %.0f\n",
-			(double)stats.total_written,
-			(double)stats.total_read,
-			(double)stats.total_size);
-	} else if (am_server != 2) {
+	/* The receiving side's stats are split between 2 procs until the
+	 * end of the run, so only the sender can output non-final info. */
+	if (code == 0 || am_sender) {
+		rprintf(FLOG,"sent %s bytes  received %s bytes  total size %s\n",
+			big_num(stats.total_written),
+			big_num(stats.total_read),
+			big_num(stats.total_size));
+	}
+	if (code != 0 && am_server != 2) {
 		const char *name;
 
 		name = rerr_name(code);
@@ -801,11 +906,11 @@ void log_exit(int code, const char *file, int line)
 
 		/* VANISHED is not an error, only a warning */
 		if (code == RERR_VANISHED) {
-			rprintf(FINFO, "rsync warning: %s (code %d) at %s(%d) [%s=%s]\n",
-				name, code, file, line, who_am_i(), RSYNC_VERSION);
+			rprintf(FWARNING, "rsync warning: %s (code %d) at %s(%d) [%s=%s]\n",
+				name, code, src_file(file), line, who_am_i(), rsync_version());
 		} else {
 			rprintf(FERROR, "rsync error: %s (code %d) at %s(%d) [%s=%s]\n",
-				name, code, file, line, who_am_i(), RSYNC_VERSION);
+				name, code, src_file(file), line, who_am_i(), rsync_version());
 		}
 	}
 }

m4/have_type.m4

@@ -0,0 +1,21 @@
+dnl AC_HAVE_TYPE(TYPE,INCLUDES)
+AC_DEFUN([AC_HAVE_TYPE], [
+cv=`echo "$1" | sed 'y%./+- %__p__%'`
+AC_MSG_CHECKING(for $1)
+AC_CACHE_VAL([ac_cv_type_$cv],
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+AC_INCLUDES_DEFAULT
+$2]],
+[[$1 foo;]])],
+[eval "ac_cv_type_$cv=yes"],
+[eval "ac_cv_type_$cv=no"]))dnl
+ac_foo=`eval echo \\$ac_cv_type_$cv`
+AC_MSG_RESULT($ac_foo)
+if test "$ac_foo" = yes; then
+  ac_tr_hdr=HAVE_`echo $1 | sed 'y%abcdefghijklmnopqrstuvwxyz./- %ABCDEFGHIJKLMNOPQRSTUVWXYZ____%'`
+if false; then
+	AC_CHECK_TYPES($1)
+fi
+  AC_DEFINE_UNQUOTED($ac_tr_hdr, 1, [Define if you have type `$1'])
+fi
+])

m4/header_major_fixed.m4

@@ -0,0 +1,27 @@
+AC_DEFUN([AC_HEADER_MAJOR_FIXED],
+[AC_CACHE_CHECK(whether sys/types.h defines makedev,
+		ac_cv_header_sys_types_h_makedev,
+[AC_LINK_IFELSE([AC_LANG_PROGRAM([[@%:@include <sys/types.h>]],
+				 [[return makedev(0, 0);]])],
+		[if grep sys/sysmacros.h conftest.err >/dev/null; then
+		   ac_cv_header_sys_types_h_makedev=no
+		 else
+		   ac_cv_header_sys_types_h_makedev=yes
+		 fi],
+		[ac_cv_header_sys_types_h_makedev=no])
+])
+
+if test $ac_cv_header_sys_types_h_makedev = no; then
+AC_CHECK_HEADER(sys/mkdev.h,
+		[AC_DEFINE(MAJOR_IN_MKDEV, 1,
+			   [Define to 1 if `major', `minor', and `makedev' are
+			    declared in <mkdev.h>.])])
+
+  if test $ac_cv_header_sys_mkdev_h = no; then
+    AC_CHECK_HEADER(sys/sysmacros.h,
+		    [AC_DEFINE(MAJOR_IN_SYSMACROS, 1,
+			       [Define to 1 if `major', `minor', and `makedev'
+				are declared in <sysmacros.h>.])])
+  fi
+fi
+])

m4/socklen_t.m4

@@ -1,27 +1,3 @@
-dnl AC_VALIDATE_CACHE_SYSTEM_TYPE[(cmd)]
-dnl if the cache file is inconsistent with the current host,
-dnl target and build system types, execute CMD or print a default
-dnl error message.
-AC_DEFUN(AC_VALIDATE_CACHE_SYSTEM_TYPE, [
-    AC_REQUIRE([AC_CANONICAL_SYSTEM])
-    AC_MSG_CHECKING([config.cache system type])
-    if { test x"${ac_cv_host_system_type+set}" = x"set" &&
-         test x"$ac_cv_host_system_type" != x"$host"; } ||
-       { test x"${ac_cv_build_system_type+set}" = x"set" &&
-         test x"$ac_cv_build_system_type" != x"$build"; } ||
-       { test x"${ac_cv_target_system_type+set}" = x"set" &&
-         test x"$ac_cv_target_system_type" != x"$target"; }; then
-	AC_MSG_RESULT([different])
-	ifelse($#, 1, [$1],
-		[AC_MSG_ERROR(["you must remove config.cache and restart configure"])])
-    else
-	AC_MSG_RESULT([same])
-    fi
-    ac_cv_host_system_type="$host"
-    ac_cv_build_system_type="$build"
-    ac_cv_target_system_type="$target"
-])
-
 dnl Check for socklen_t: historically on BSD it is an int, and in
 dnl POSIX 1g it is a type of its own, but some platforms use different
 dnl types for the argument to getsockopt, getpeername, etc.  So we
@@ -42,15 +18,15 @@ AC_DEFUN([TYPE_SOCKLEN_T],
          rsync_cv_socklen_t_equiv=
          for arg2 in "struct sockaddr" void; do
             for t in int size_t unsigned long "unsigned long"; do
-               AC_TRY_COMPILE([
+               AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <sys/types.h>
 #include <sys/socket.h>
 
                   int getpeername (int, $arg2 *, $t *);
-               ],[
+               ]],[[
                   $t len;
                   getpeername(0,0,&len);
-               ],[
+               ]])],[
                   rsync_cv_socklen_t_equiv="$t"
                   break
                ])
@@ -67,5 +43,3 @@ AC_DEFUN([TYPE_SOCKLEN_T],
       [#include <sys/types.h>
 #include <sys/socket.h>])
 ])
-
-

m4/validate_cache_system_type.m4

@@ -0,0 +1,23 @@
+dnl AC_VALIDATE_CACHE_SYSTEM_TYPE[(cmd)]
+dnl if the cache file is inconsistent with the current host,
+dnl target and build system types, execute CMD or print a default
+dnl error message.
+AC_DEFUN([AC_VALIDATE_CACHE_SYSTEM_TYPE], [
+    AC_REQUIRE([AC_CANONICAL_SYSTEM])
+    AC_MSG_CHECKING([config.cache system type])
+    if { test x"${ac_cv_host_system_type+set}" = x"set" &&
+         test x"$ac_cv_host_system_type" != x"$host"; } ||
+       { test x"${ac_cv_build_system_type+set}" = x"set" &&
+         test x"$ac_cv_build_system_type" != x"$build"; } ||
+       { test x"${ac_cv_target_system_type+set}" = x"set" &&
+         test x"$ac_cv_target_system_type" != x"$target"; }; then
+	AC_MSG_RESULT([different])
+	ifelse($#, 1, [$1],
+		[AC_MSG_ERROR(["you must remove config.cache and restart configure"])])
+    else
+	AC_MSG_RESULT([same])
+    fi
+    ac_cv_host_system_type="$host"
+    ac_cv_build_system_type="$build"
+    ac_cv_target_system_type="$target"
+])