linux-kernel - Re: [PATCH] Implement file posix capabilities

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Message-ID: <20070124163004.GA15979@sgi.com>
Date:	Wed, 24 Jan 2007 10:30:05 -0600
From:	"Bill O'Donnell" <billodo@....com>
To:	KaiGai Kohei <kaigai@...gai.gr.jp>,
	"Serge E. Hallyn" <serue@...ibm.com>,
	Chris Friedhoff <chris@...edhoff.org>
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	Stephen Smalley <sds@...ho.nsa.gov>
Subject: Re: [PATCH] Implement file posix capabilities

I'm in the process of testing the (backported) capabilities patch 
and Kaigai's userspace tools on a SLES10 based x86-64 target (2.6.16).  
Chris Friedhoff's examples (http://www.friedhoff.org/fscaps.html)
run cleanly.  That said, can one expect, through the use of these
enhanced capabilities, to be able to add some finer grain 
capabilities based on a specific userid?  In Chris' ping example,
the suid is removed from /bin/ping to restrict it to root, and a 
capability added to allow any user to execute it.  Can that example
be extended to make it so only a _particular_ user can execute it?
I realize with SELinux, one could achieve the goal, but as a stopgap,
can capabilities be used to get there?
Thanks,
Bill

-- 
Bill O'Donnell
SGI
billodo@....com
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