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Subject: Re: Filesystem Capabilities in 2.6?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Alexander Viro <viro@math.psu.edu>,
       Olaf Dietsche <olaf.dietsche#list.linux-kernel@t-online.de>,
       "Theodore Ts'o" <tytso@mit.edu>, Dax Kelson <dax@gurulabs.com>,
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       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, davej@suse.de
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Date: 03 Nov 2002 12:57:43 +0000
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On Sun, 2002-11-03 at 03:35, Linus Torvalds wrote:
> With a simple extended binfmt_misc.c or binfmt_script.c, we could do a
> capability escape (that only removes capabilities, but allows for suid
> shells) fairly easily if people really want it. And it would work on any
> almost-UNIXy filesystem, including NFS etc.
> 
> But I like Al's idea of mount binds even more, although it requires maybe
> a bit more administration.

The two are seperate things IMHO

Namespaces is a way to inherit revocation of rights on a large scale (or
a small one true). #! is a way to handle program specific revocation of
rights which _is_ filesystem persistent.

The former is a database view, the latter is an actual database change

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