linux-kernel - Re: RFC: allow empty symlink targets

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Date:	Fri, 24 May 2013 12:01:14 +0200
From:	Pavel Machek <pavel@....cz>
To:	Eric Blake <eblake@...hat.com>
Cc:	Pádraig Brady <P@...igBrady.com>,
	linux-kernel@...r.kernel.org
Subject: Re: RFC: allow empty symlink targets

Hi!

> > Following up from http://austingroupbugs.net/view.php?id=649
> > It seems POSIX will now allow the current Linux behavior of returning ENOENT,
> 
> Huh?  Linux currently doesn't allow the creation of an empty symlink.
> That link mentions the current BSD behavior of returning ENOENT when
> resolving such a symlink (that is, what stat() does when chasing through
> an empty symlink, provided such a symlink is first created).
> 
> > or the Solaris behavior of allowing empty symlink targets.
> 
> The point made in that bug report is that Linux is buggy for not
> allowing symlink() to create an empty symlink in the first place; once
> you allow the creation of an empty symlink, then how to handle such a
> symlink in stat() is up to you whether to copy Solaris' or BSD's example.

What happens when Linux tries to follow symlink created by
BSD/Solaris? I'm sure BSDs can write ext2 and we can read some BSD
filesystems...
									Pavel
									
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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