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To: 9fans@cse.psu.edu
Subject: Re: [9fans] group permission
From: "Sascha Retzki" <sretzki@gmx.de>
Date: Sun, 30 Jul 2006 15:06:31 +0200
In-Reply-To: <91D038E8-828E-451C-A069-265FF382D7D5@ar.aichi-u.ac.jp>
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> Is there any problem if alice can
> 	chgrp bob foo
> even if she is not a member of bob?
>


On unix you got +s-bits, so a cool way for a rootshell is to setuid a copy of /bin/sh and make a nice present to Mr. root ;) - Plan9 got neither root nor +s, so I don't see a problem.


(Of course, you must be the owner of that file to make chgrp, elsewise, the model breaks.)

> Kenji Arisawa