Re: [Xenomai-help] Xenomai: binding failed: Operation not permitted.

["s.a." <sancelot@domain.hid>]

Hi,

Okay, but in this case, why do we need  root permissions for programs
accessing that "only" access shared memory area (heaps)????

Best Regards
Steph


Jan Kiszka wrote

>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.
>>
>>Error showed after kernel update 2.6.15.6 -> 2.6.16.16 and xenomai update 2.1.1 -> daily snapshot (2006/05/18)
>>Changing of the rights of the /dev/rt* dousn't help.
>>
>>Any suggestions?
>>
>>    
>>
>
>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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