Helmut Waitzmann <[EMAIL PROTECTED]> wrote:
> So it's impossible to let
> $ tar --keep-newer-files -x ...
> overwrite old files rather than unlink and recreate them?
Yes, it is impossible.
> This is what I hoped,
> $ --overwrite --keep-newer-files -x ...
> would do.
To summarize: the three options --keep-newer-files, --overwrite and
--unlink-first control the behavior of tar when extracting archive
member over *existing* files. Their effect is as follows:
--keep-newer-files If the file on the filesystem is newer than
its archive version, preserve the filesystem
version. Otherwise, unlink it and replace with
the archive version.
--overwrite No matter what the file timestamp is, replace
it with the archive version. Notice, that
replacing means unlinking old file and
creating a new one in its stead.
--unlink-first Same as --overwrite, the only difference being
that --unlink-first tries to unlink file
before opening (even if it does not exist),
while --overwrite unlinks it only after
opening it returns EEXIST.
Regards,
Sergey
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