The probe() helper sends the @RSYNCD greeting after the PROXY header, then
reads the daemon's response. For a `want='drop'` leg (untrusted peer / a
daemon with no `proxy protocol hosts`) the daemon closes the connection,
which on some CI runners surfaces as EPIPE/ECONNRESET on our sendall() before
we ever read -- an uncaught BrokenPipeError that failed the test (seen on
AlmaLinux 8 and Ubuntu 22.04, a timing race; other runners closed read-side).
Wrap the send/recv in `except OSError` and leave `out` empty: for want='drop'
the absent greeting is the expected outcome; want='ok'/'denied' still fail
correctly on an absent greeting.
Adds the coverage/regression tests from the code-scanner run and the
gcov plumbing they rely on:
- scanner-argv-bounds, scanner-batch-flag-mismatch,
scanner-delete-delay-overread, scanner-daemon-log-checksum:
regression tests for the argv/-v/--info/--skip-compress bounds, the
batch metadata-ndx corruption, the read_delay_line off-by-one, and
the daemon -c/%C checksum-slot leak.
- daemon-proxy-protocol, daemon-early-exec-nameconv, daemon-auth-group,
daemon-standalone-detach, misc-coverage, nonroot-restrictive-perms,
backup-acl-xattr-cache: daemon and path coverage tests.
- rsyncfns.py: CAP_MKNOD probe in devices_supported().
- gcov_flush() macro (rsync.h) + calls in the daemon fork/_exit paths
(clientserver.c, socket.c); no-op without --enable-coverage. Makefile.in
COVERAGE_EXCLUDE / gcovr / setuid .gcda refinements.
- CI: list the new TCP/root/ACL tests in the per-platform
RSYNC_EXPECT_SKIPPED sets.
Co-authored-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andrew Tridgell