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Make sure we properly check the target of symlinks even when the target
does not exist. This caused problems in two ways:
(1) It allowed code to bypass checks by writing through a symlink that
was in a good location but pointed to a bad (non-existent) location.
(2) It caused code to be wrongly rejected when it tried writing to a
symlink in a bad location but pointed to a good location.
In order to get this behavior, we need to use the new gnulib helpers
added in the previous commit. They include functions which can look
up the targets of symlinks even when the final path doesn't exist.
URL: https://bugs.gentoo.org/540828
Reported-by: Rick Farina <zerochaos@gentoo.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Mike Frysinger
GitWeb