tar(1) and --uid/--gid on 9.0-RELEASE

[Devin Teske]

I see in the tar(1) man-page on FreeBSD 9.0-RELEASE two options that I would
like to use:

--uid #
--gid #

Naturally, these are used to override the on-disk credentials while creating (or
extracting) an archive.

Problem?

They don't seem to be supported.

% tar cf some_archive.tar --gid 0 --uid 0 somedir
tar: Option --gid is not supported
...

WTF?!
-- 
Devin

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