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Message-ID: <20111121234913.GZ24939@port70.net>
Date: Tue, 22 Nov 2011 00:49:13 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: realpath of nonreadable files
i guess this is known but i'll note it anyway:
realpath opens the filename so if we have no read permission
to the last component the call will fail with EACCES
this is not consistent with glibc which walks the path
and stats along the way so only fails if an intermediate
path component is not readable or not searchable
musl seems to be posix compliant, but the spec is not very clear
http://pubs.opengroup.org/onlinepubs/9699919799/functions/realpath.html
eg compared to stat where 'path prefix' is explicitly specified
http://pubs.opengroup.org/onlinepubs/9699919799/functions/stat.html
is it a glibc bug? posix bug?
maybe add a comment about this in realpath.c?
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