linux-kernel - Re: group ownership of tun devices -- nonfunctional?

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Message-ID: <20070823071332.GA4559@bogon.ms20.nix>
Date:	Thu, 23 Aug 2007 09:13:32 +0200
From:	Guido Guenther <agx@...xcpu.org>
To:	Jeff Dike <jdike@...toit.com>
Cc:	Mike Mohr <akihana@...il.com>, Rene Herman <rene.herman@...e.nl>,
	linux-kernel@...r.kernel.org, Bodo Eggert <7eggert@....de>
Subject: Re: group ownership of tun devices -- nonfunctional?

Hi,
On Wed, Aug 22, 2007 at 04:42:54PM -0400, Jeff Dike wrote:
> > I can create devices that are owned by my user account (tunctl -u
> > `whoami` -t tap0) and it works fine.  However, if I use group
> > permissions with -g it stops working.  In all cases, if I pass -g
> > <group>, the interface is created correctly but it is unusable as a
> > non-root user.
> 
> I can't reproduce this - it seems to work fine on -rc3-mm1:
Works fine here too. I had a similar report and there seems to be some
confusion since the group has to be the processes effective group not
any supplementary group the user happens to be in. Could that be the
problem here too?
Cheers,
 -- Guido
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