Re: [Xenomai-core] system() question
Gilles Chanteperdrix wrote: > Stéphane ANCELOT wrote: > >>I tried it, but did not help, I manged to do the trick using >>start-stop-daemon > > > If I understand correctly the problem you have, it is not related at all > with Xenomai. What you want is to make your application a real daemon. > The easy way to do this is to call the glibc function named "daemon" the > hard way is to call fork twice, call setsid and setpgrp. > start-stop-daemon will not do the trick. > It is enough to fork only once, to call setsid in the child and call _exit in the father. That is what the daemon function does. Anyway, this is basic unix knowledge, for which you will get more acurate details at other places. -- Gilles Chanteperdrix ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] system() question
Stéphane ANCELOT wrote: > I tried it, but did not help, I manged to do the trick using > start-stop-daemon If I understand correctly the problem you have, it is not related at all with Xenomai. What you want is to make your application a real daemon. The easy way to do this is to call the glibc function named "daemon" the hard way is to call fork twice, call setsid and setpgrp. start-stop-daemon will not do the trick. -- Gilles Chanteperdrix ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] system() question
I tried it, but did not help, I manged to do the trick using
start-stop-daemon
Gilles Chanteperdrix wrote:
Stéphane ANCELOT wrote:
> my linux user task uses a system() call in order to call a bash script
> to restart the realtime task as follow :
>
> user interface C call :
> system("restart_task.sh");
> give back hand to user interface
>
>
>
>
>
> bash script restart_task.sh :
> killall -15 mytask
> sleep 2
> mytask &
>
>
> system call dies because sh script has been launched
Try calling daemon(0,0) in mytask instead of using "&" to make it run in
the background.
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Re: [Xenomai-core] system() question
Stéphane ANCELOT wrote:
> my linux user task uses a system() call in order to call a bash script
> to restart the realtime task as follow :
>
> user interface C call :
> system("restart_task.sh");
> give back hand to user interface
>
>
>
>
>
> bash script restart_task.sh :
> killall -15 mytask
> sleep 2
> mytask &
>
>
> system call dies because sh script has been launched
Try calling daemon(0,0) in mytask instead of using "&" to make it run in
the background.
--
Gilles Chanteperdrix.
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Re: [Xenomai-core] system() question
my linux user task uses a system() call in order to call a bash script
to restart the realtime task as follow :
user interface C call :
system("restart_task.sh");
give back hand to user interface
bash script restart_task.sh :
killall -15 mytask
sleep 2
mytask &
system call dies because sh script has been launched
Gilles Chanteperdrix wrote:
Stéphane ANCELOT wrote:
Is there a way to launch my realtime task from another linux program
using system() C call ?
I have tried it , but when system call dies my rt task dies too ...
any idea ?
Why does the system call die ? Do you observe the same behaviour with
non xenomai applications ?
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Re: [Xenomai-core] system() question
Stéphane ANCELOT wrote: > Is there a way to launch my realtime task from another linux program > using system() C call ? > > I have tried it , but when system call dies my rt task dies too ... > any idea ? Why does the system call die ? Do you observe the same behaviour with non xenomai applications ? -- Gilles Chanteperdrix ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
[Xenomai-core] system() question
Is there a way to launch my realtime task from another linux program using system() C call ? I have tried it , but when system call dies my rt task dies too ... any idea ? steph ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
