[Bug 228069] tar(1) fails to append newer files only (-u, --update), but always appends all files (like -r).
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Date: Tue, 17 Sep 2024 05:12:09 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228069
titus m <titus@edc.ro> changed:
What |Removed |Added
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CC| |titus@edc.ro
--- Comment #1 from titus m <titus@edc.ro> ---
the problem comes from the fact that tar file format (ustar/default) does not
support fractional file timestamps and the file system does. so the files on
the filesystem having most likeley a fractional mtime will always appear to be
newer than the ones in the archive. A work-around is to use pax (or fix
libarchive to compare mtime_nanoseconds only when archive->format is "pax")
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