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The Python rewrite had gated the xattr / fake-super tests (xattrs,
xattrs-hlink, chown-fake, devices-fake) to Linux because it used the
Linux-only os.*xattr. Restore them on macOS, FreeBSD, Cygwin and Solaris
via a per-OS xattr surface in rsyncfns.py (xattrs_supported / xattr_set /
xattr_dump):
* Linux -- os.*xattr
* macOS -- xattr
* FreeBSD -- setextattr / lsextattr / getextattr
* Cygwin -- getfattr / setfattr (from the `attr` package; CPython on
Cygwin has no os.*xattr)
* Solaris -- runat(1), with the script on stdin and the attr name/value
passed via the environment (the runat -c form mangles args)
Test attribute names are logical; the "user." namespace prefix is added
only on the Linux-style platforms (Linux, Cygwin). RSYNC_PREFIX/RUSR vary
per OS (macOS and Solaris use rsync.nonuser to avoid rsync's reserved
rsync.* space). The macOS and Cygwin workflows no longer skip these tests;
the FreeBSD/Solaris jobs use IGNORE skip-checking so need no change.
Verified on real Linux, macOS, FreeBSD, Cygwin and Solaris hosts.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>