linux-kernel - Trailing slash with symlinks and rmdir/rename

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Date:	Mon, 9 Sep 2013 23:08:50 +0200
From:	Ross Lagerwall <rosslagerwall@...il.com>
To:	linux-fsdevel@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>
Subject: Trailing slash with symlinks and rmdir/rename

Hi,

I have noticed that if X is a symlink to a directory Y, doing "rmdir X/"
or "mv X/ Z" does not behave how I expect.

My reading of POSIX 2008 (and the behaviour of FreeBSD and OpenIndiana)
is that a symbolic link to a directory followed by a trailing slash
should behave as though it names the directory pointed to by the
symbolic link.

So while Linux gives ENOTDIR for "rmdir X/", the others remove Y.

Is this a bug?  If it is, I can have a go at writing a patch.

Regards
-- 
Ross Lagerwall
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/