From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 19 May 2006 10:12:22 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
MIME-Version: 1.0
Subject: Re: [Xenomai-help] Xenomai: binding failed: Operation not permitted.
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To: Petr Cervenka <grugh@domain.hid>
Cc: xenomai@xenomai.org

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Petr Cervenka wrote:
> Hi,
> When I try to run realtime application under lesser than root rights, I=
 get this strange error:
> Xenomai: binding failed: Operation not permitted.
>=20
> Error showed after kernel update 2.6.15.6 -> 2.6.16.16 and xenomai upda=
te 2.1.1 -> daily snapshot (2006/05/18)
> Changing of the rights of the /dev/rt* dousn't help.
>=20
> Any suggestions?
>=20

That's intended. Real-time means real power, so all skin syscalls now
require root privileges (more precisely CAP_SYS_NICE). This can be
switched off, but standard syscalls like mlockall may still demand root
power (mlock'ing is at least size-limited for normal users on recent
kernels). And with current real-time APIs, it makes no sense anyway to
restrict the real-time user's permission by turning his account into a
non-root one.

Jan


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