rsync/NEWS.md

NEWS for rsync 3.2.0 (UNRELEASED)

Protocol: 31 (unchanged)

Changes since 3.1.3:

BUG FIXES:

• Avoid a potential out-of-bounds read in daemon mode if argc can be made to become 0.

• Fix the default list of skip-compress files for non-daemon transfers.

• Fix xattr filter rules losing an 'x' attribute in a non-local transfer.

• Avoid an error when a check for a potential fuzzy file happens to reference a directory.

• Make the atomic-rsync helper script have a more consistent error-exit.

• Make sure that a signal handler calls _exit() instead of exit().

• Various zlib fixes, including security fixes for CVE-2016-9843, CVE-2016-9842, CVE-2016-9841, and CVE-2016-9840.

• Fixed an issue with --remove-source-files not removing a source symlink when combined with --copy-links.

• Fixed a bug where the daemon would fail to write early fatal error messages to the client, such as refused or unknown command-line options.

• Fixed the block-size validation logic when dealing with older protocols.

• Some rrsync fixes and enhancements to handle the latest options.

• Fixed a crash in the --iconv code.

• Fixed a bug in the writing of the batch.sh file (w/--write-batch) when the source & destination args were not last on the command-line.

ENHANCEMENTS:

• Various checksum enhancements, including the optional use of openssl's MD4 & MD5 checksum algorithms, some x86-64 optimizations for the rolling checksum, some x86-64 optimizations for the (non-openssl) MD5 checksum, the addition of xxhash checksum support, and a negotiation heuristic that ensures that it is easier to add new checksum algorithms in the future. Currently the x86-64 optimizations require the use of the --enable-simd flag to configure, but they will probably be enabled by default in the near future. The environment variable RSYNC_CHECKSUM_LIST can be used to customize the preference order of the negotiation.

• Various compression enhancements, including a negotiation heuristic that tries to pick the best compression option supported by both sides. The environment variable RSYNC_COMPRESS_LIST can be used to customize the preference order of the heuristic (which will be more useful when new compression options are added).

• Added the --atimes option based on the long-standing patch (just with some fixes that the patch has been needing).

• Added --open-noatime option to open files using O_NOATIME.

• Added the --write-devices option based on the long-standing patch.

• Added openssl support to the rsync-ssl script via its renamed helper script, rsync-ssl-rsh. Both bash scripts are now installed by default (removing the install-ssl-client make target). Rsync was also enhanced to set the RSYNC_PORT environment variable when running a daemon-over-rsh script. Its value is the user-specified port number (set via --port or an rsync:// URL) or 0 if the user didn't override the port.

• Added negated matching to the daemon's refuse options setting by using match strings that start with a ! (such as !compress*).

• Added status output in response to a signal (via both SIGINFO & SIGVTALRM).

• Added a --copy-as=USER option to give some extra security to root-run rsync commands into/from untrusted directories (such as backups and restores).

• When resuming the transfer of a file in the --partial-dir, rsync will now update that partial file in-place instead of creating yet another tmp file copy. This requires both sender & receiver to be at least v3.2.0.

• Added support for RSYNC_SHELL & RSYNC_NO_XFER_EXEC environment variables that affect the pre-xfer exec and post-xfer exec rsync daemon options.

• Fixed a problem with the --link-dest|--copy-dest code when --xattrs was specified along with multiple alternate-destination directories (it could possibly choose a bad file match while trying to find a better xattr match).

• Various manpage improvements.

DEVELOPER RELATED:

• Silenced some annoying warnings about major()|minor() due to the autoconf include-file check not being smart enough.

• Improved some configure checks to work better with strict C99 compilers.

• The --debug=FOO options are no longer auto-forwarded to the server side, allowing more control over what is output & the ability to request debug data from divergent rsync versions.

• Some perl scripts were recoded into awk and python3.

• Some defines in byteorder.h were changed into static inline functions that will help to ensure that the args don't get evaluated multiple times on careful alignment hosts.

• Some code typos were fixed (as pointed out by a Fossies run).

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