linux-kernel - Re: One process with multiple user ids.

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Message-ID: <Pine.LNX.4.64.0710021322110.7130@fbirervta.pbzchgretzou.qr>
Date:	Tue, 2 Oct 2007 13:23:22 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Giuliano Gagliardi <gogi-k@...i.tv>
cc:	linux-kernel@...r.kernel.org
Subject: Re: One process with multiple user ids.

On Oct 2 2007 12:56, Giuliano Gagliardi wrote:
>
>I have a server that has to switch to different user ids, but because it does 
>other complex things, I would rather not have it run as root. I only need the 
>server to be able to switch to certain pre-defined user ids.

All you need is CAP_SETUID. Also see man setresuid,
where you could, I think, use saved_uid=0 if you do not
like to use real_uid=0 effective_uid=non-0.

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