Subject: Re: lib/30664: realpath and magic symlinks
To: YAMAMOTO Takashi <firstname.lastname@example.org>
From: Jason Thorpe <email@example.com>
Date: 07/08/2005 09:02:19
On Jul 4, 2005, at 4:26 PM, firstname.lastname@example.org wrote:
> realpath(3) (or, more generally, userland code which resolves
> symlinks by itsself using readlink(2)) doesn't handle
> magic symlinks and can cause problems.
> it's subtle because it isn't obvious which of userland or kernel
> resolves a symlink for a given application.
Perhaps readlink(2) should translate the magic symlink? But that
would break ls(1). Perhaps we could add a readlink2(2) that takes a
flags argument, allowing us to specify "raw" or "translated".
readlink(2) would default to "translated", and ls(1) would be changed
to use "raw".