O_NOFOLLOW

[Andreas Jaeger]

>>>>> Roland McGrath writes:

 > Does O_NOFOLLOW mean to not follow symlinks, and instead open the node for
 > the symlink itself?  The Hurd has had O_NOLINK to mean that for years.  I
 > wish Linux hackers could be bothered to look three feet for an existing
 > name to be compatible with.
It means to not follow symlinks when opening - but if a symlink is
tried it's not opened at all.

This was AFAIK implemented to guard against creating, e.g. forcing
root to create a file (core) that is symlinked to /etc/passwd.

Andreas
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 Andreas Jaeger   aj@arthur.rhein-neckar.de    jaeger@informatik.uni-kl.de
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