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The following reply was made to PR lib/30664; it has been noted by GNATS.
From: Jason Thorpe <thorpej@xxxxxxxxxxxxxx>
To: YAMAMOTO Takashi <yamt@xxxxxxxxxxxxxxxxx>
Cc: netbsd-bugs@xxxxxxxxxx, gnats-bugs@xxxxxxxxxx,
NetBSD Kernel Technical Discussion List <tech-kern@xxxxxxxxxx>
Subject: Re: lib/30664: realpath and magic symlinks
Date: Fri, 8 Jul 2005 09:02:19 -0700
On Jul 4, 2005, at 4:26 PM, yamt@xxxxxxxxxxxxxxxxx wrote:
>> Description:
>>
> 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".
Thoughts?
-- thorpej
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