linux-kernel - Re: [PATCH] 2.6.23: Filesystem capabilities 0.17

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Message-ID: <87fxzp8v2c.fsf@olafdietsche.de>
Date:	Thu, 01 Nov 2007 23:22:51 +0100
From:	Olaf Dietsche <olaf+list.linux-kernel@...fdietsche.de>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] 2.6.23: Filesystem capabilities 0.17

Jan Kara <jack@...e.cz> writes:

> On Thu 01-11-07 20:49:32, Olaf Dietsche wrote:
>> Jan Kara <jack@...e.cz> writes:
>> 
>> >> This patch implements filesystem capabilities. It allows to
>> >> run privileged executables without the need for suid root.
>> >   Hmm, is there some "design document" so that one does not have to poke
>> > through the code and find out what it's actually trying to do?
>> 
>> What do you mean with "trying to do"? I thought this is obvious, it
>> provides executables with filesystem capabilities.
>   Well, yes, that was obvious but I rather meant "how is it doing it?".
> So where does it store these bits and such.

The bits are stored in a sparse file named /.capabilities in the
directory of the mount point, where the corresponding executable
lives. The inode number of the file is the index into this file.

Regards, Olaf.
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