changing gzip's symlink handling to be consistent with bzip2,
xz and GNU gzipy
Alexander Best
arundel at freebsd.org
Mon Nov 15 21:29:59 UTC 2010
On Mon Nov 15 10, Xin LI wrote:
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> Hi,
>
> On 11/15/10 10:24, Alexander Best wrote:
> > hi there,
> >
> > any thoughts on this patch? it changes the semantics of gzip so that it is
> > consistent with the semantics of bzip2, xz and for more important GNU gzip.
>
> Could you please elaborate more about the GNU gzip behavior?
>
> By the way I also found some difference between BSD gzip and GNU gzip:
>
> touch foo
> ln -s foo.nonexistent foo.gz
>
> gzip foo
> gzip: could not create output: foo.gz: File exists
>
> /usr/local/bin/gzip foo
> gzip: foo.gz already exists; do you wish to overwrite (y or n)? ^C
> (case 1)
^^ confirmed!
>
> echo | /usr/local/bin/gzip foo
> gzip: foo.gz already exists; not overwritten
^^ this is only the GNU output. however bsd gzip seems to behave the same
>
> gzip -f foo
> gzip: could not create output: foo.gz: File exists
>
> /usr/local/bin/gzip -f foo
> (succeeded; case 2).
^^ confirmed!
it appears the designers of BSD gzip did not take symbolic links into account.
cheers.
alex
>
>
> Cheers,
> - --
> Xin LI <delphij at delphij.net> http://www.delphij.net/
> FreeBSD - The Power to Serve! Live free or die
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--
a13x
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