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Date: Fri, 11 May 2012 17:21:19 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] Xenomai: binding failed: Operation not permitted.
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To: Frederik Bayart <frederik.bayart@domain.hid>
Cc: xenomai@xenomai.org

On 05/11/2012 05:02 PM, Frederik Bayart wrote:
> now with mailing list in cc
> 
> Hallo Gilles,
> 
>  by adding my user to group xenomai and configuring the
>  xeno_nucleus.xenomai_gid parameter on the command line, I was able to
>  run my binary as non-root, so my problem is solved.
> 
>  However, I noticed that if I start my binary as root, and using
>  seteuid and setegid to non-root as in de example still fails. I don't
>  know whether this is normal or a bug.

It is normal. For your case to run, the fork itself must be run a root.
So, you should call again seteuid/setegid before vfork, then drop again
the rights before exec (if you do not want the exec to be run as root).

-- 
					    Gilles.