Re: [Xenomai-help] Xenomai with µClibc

[Philippe Gerum <rpm@xenomai.org>]

On Mon, 2007-05-28 at 15:38 +0200, Gilles Chanteperdrix wrote:
> Fillod Stephane wrote:
> > You may also need this patch:
> > 
> > --- skins/native/task.c 20 Mar 2007 08:16:41 -0000      1.1.1.1
> > +++ skins/native/task.c 28 Mar 2007 13:53:03 -0000      1.2
> > @@ -135,7 +135,12 @@
> >         pthread_attr_setstacksize(&thattr, stksize);
> >         if (!(mode & T_JOINABLE))
> >                 pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_DETACHED);
> > -       if (prio > 0) {
> > +       /* There's a limitation in libpthread
> > +        * that returns EPERM upon SCHED_FIFO
> > +        * for non priviledged users.
> > +        * So workaround this for now. FIXME (in uClibc/pthread).
> > +        */
> > +       if (prio > 0 && geteuid() == 0) {
> >                 pthread_attr_setschedpolicy(&thattr, SCHED_FIFO);
> >                 param.sched_priority = sched_get_priority_max(SCHED_FIFO);
> >         }
> 
> I do not think it is a good idea, I prefer rt_task_create to fail loudly
> because it needs root priviledge, rather than silently creating a non
> real-time thread.
> 

Agreed.

-- 
Philippe.