Restart binary if it dies

kruuth · 2014-05-14 19:52:50

I've got a binary that executes once xorg is started. Periodically it will die off. Is there a simple method that would check to be sure that this is still running and if not, start it again?

Trilby · 2014-05-14 20:00:13

You can run it in a loop.

What is the program? Does it give a particular (or any non-zero) exit code when it quits unexpectedly?

HiImTye · 2014-05-14 20:00:22

while :; sleep 5; if ! ps -C yourProcess; then (yourProcess &); fi; done

Trilby · 2014-05-14 20:06:13

HiImTye, that's a bit more complex than needed:

while :; yourProcess; done &

would do. Both of these, however, make actually quitting intentionally non-trivial. This is why I asked about the exit code. The following would be best if it will work:

while [[ $(yourProcess) -ne 0 ]]; do :; done

EDIT: I guess this depends on if the process puts anything on stdout too ...

Last edited by Trilby (2014-05-14 20:09:13)

HiImTye · 2014-05-14 20:09:44

Trilby wrote:

while :; do yourProcess; done &

I had no idea until now this syntax would work lol

Last edited by HiImTye (2014-05-14 20:11:09)

firecat53 · 2014-05-14 20:16:11

You could run it as a systemd service with 'Restart=' set to an appropriate value (see man systemd.service). This would always restart it or perhaps only when it failed, depending on the values you set.

Scott

Raynman · 2014-05-14 22:36:35

Trilby wrote:

HiImTye, that's a bit more complex than needed:
while :; yourProcess; done &
would do. Both of these, however, make actually quitting intentionally non-trivial. This is why I asked about the exit code. The following would be best if it will work:
while [[ $(yourProcess) -ne 0 ]]; do :; done
EDIT: I guess this depends on if the process puts anything on stdout too ...

Of course, if you test the output, it depends on the output. If you test the exit code, it depends on the exit code:

while ! yourProcess; do :; done

jakobcreutzfeldt · 2014-05-14 22:40:42

http://www.gnu.org.ua/software/pies/

linux-ka · 2014-05-15 12:21:28

If you wrote it by yourself, just fork it. If the child dies, the next fork will jump in...and so on.

kruuth · 2014-05-16 17:09:17

It's unfortunately not mine. One thing....I would like it to execute after I start X.

Trilby · 2014-05-16 18:11:32

So ... put it in your xinitrc.

kruuth · 2014-05-16 19:08:13

Ah ok. I had it in the jwmrc and it would die and not restart.

Arch Linux

#1 2014-05-14 19:52:50

Restart binary if it dies

#2 2014-05-14 20:00:13

Re: Restart binary if it dies

#3 2014-05-14 20:00:22

Re: Restart binary if it dies

#4 2014-05-14 20:06:13

Re: Restart binary if it dies

#5 2014-05-14 20:09:44

Re: Restart binary if it dies

#6 2014-05-14 20:16:11

Re: Restart binary if it dies

#7 2014-05-14 22:36:35

Re: Restart binary if it dies

#8 2014-05-14 22:40:42

Re: Restart binary if it dies

#9 2014-05-15 12:21:28

Re: Restart binary if it dies

#10 2014-05-16 17:09:17

Re: Restart binary if it dies

#11 2014-05-16 18:11:32

Re: Restart binary if it dies

#12 2014-05-16 19:08:13

Re: Restart binary if it dies

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