[klibc] [PATCH] initramfs: multiple CPIO unpacking fix
jbailey at ubuntu.com
Tue Feb 21 18:14:01 PST 2006
Le mercredi 22 février 2006 à 10:45 +1100, Michael Neuling a écrit :
> The following patch unlinks (deletes) files, symlinks, FIFOs, devices
> etc before writing them when extracting CPIOs. It doesn't delete
> directories. This stops weird behaviour like:
> 1) writing through symlinks created in earlier CPIOs. eg foo->bar in
> the first CPIO. Having foo as a non link in a subsequent CPIO,
> results in bar being written and foo remaining as a symlink.
I've tended to think of this as a feature, actually. In Ubuntu, for
instance, we might have 2.6.15-8 and 2.6.15-9 which represent different
ABIs from security updates or other changes. If I have a module that is
intended to be compatible with both, I might setup /lib/modules/generic
to be a symlink to /lib/modules/2.6.15-9/ and unpack the modules after
the symlink is expected to be there.
(I don't think we use this feature right now, but I had tested it and
noted it before. It's very convenient, since it's the exact same
behaviour that dpkg itself has)
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