The version of tar that comes with freebsd (v1.11.2 with local
freebsd modifications) has a bug: if you attempt to copy large
files (> 2GB) it will silently truncate the large file.
To reproduce this bug, simply use
tar cf - <dir> | (cd <newlocation>; tar xvpf -)
where <dir> is a directory that contains a large file.
There is a new version of gnu tar (v1.13) that has support for
large files. I have tested this new version of tar on a
recent snapshot of FreeBSD-STABLE (3.2-19990810), and it works
fine with >2GB files. I also looked at the local modifications
to the 1.11.2 version of tar, to understand how hard it would
be to upgrade. FreeBSD has added the following behavior over
the years:
the --unlink option:
tar 1.13 has equivalent functionality with --unlink-first
the --norecurse option:
tar 1.13 has equivalent functionality with --no-recursion
the --bzip and --unbzip options:
tar 1.13 has equivalent functionality with the
--use-compress-program option
the --fast-read option:
tar 1.13 does not have equivalent functionality
I looked at the implementation of fast-read, and it doesn't look
too hard to adapt to the new version of tar. I could create
patches if there is interest....
Alec
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