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Date: Sun, 29 Apr 2012 17:56:31 +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 04/25/2012 04:00 PM, Frederik Bayart wrote:
> Migration to squeeze is the next step planned.
> In attachment a small test program to reproduce the problem and a makefile.
> The program is running as root but we want e.g. the command executed
> by the popen command running as user 'triphase'
> 
> if you run the program and press CTRL-C, you get Xenomai: binding
> failed on 2.6.0 and output (of part of the output) from 'ls' on
> 2.4.10.

I am afraid you will have to add the triphase user to the xenomai group
and pass the xeno_nucleus.xenomai_gid option to the kernel. Or else
rewrite the vfork + exec yourself dropping root privileges after the fork.

The reason is that the native api assumes that if you fork in a xenomai
program, chances are you will want to use the native api in the child
program.
-- 
					    Gilles.