[Baypiggies] Dumb "keep it running" script

[Brent Pedersen]

On Wed, Sep 23, 2009 at 12:02 PM, Benjamin Sergeant <bsergean at gmail.com> wrote:
> Hi there,
>
> I figured out this morning that I had a long-running process that died
> one week ago for some obscure reasons. I made a little script that
> restarts a script when the called script die. I know there are already
> existing stuff doing that but I could not remember the name / find any
> existing ones  ... so why not re-inventing the wheel one more time :)
>
> Thanks for any feedback,
> - Benjamin
>
> http://code.activestate.com/recipes/576911/
> #!/usr/bin/env python
>
> import sys
> import time
> import subprocess
>
> """
> Keep a process up and running
>
> If you have a long running process that can be killed for strange and unknown
> reason, you might want it to be restarted ... this script does that.
>
> $ cat alive.sh
> #!/bin/sh
>
> while `true`; do echo Alive && sleep 3 ; done
>
> Use it like this:
> $ keepup.py ./alive.sh
> """
>
> cmd = ' '.join(sys.argv[1:])
>
> def start_subprocess():
>    return subprocess.Popen(cmd, shell=True)
>
> p = start_subprocess()
>
> while True:
>
>    res = p.poll()
>    if res is not None:
>        print p.pid, 'was killed, restarting it'
>        p = start_subprocess()
>
>    time.sleep(1)
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there's also the monitor option in paste serve. check out
restart_with_monitor() in
http://svn.pythonpaste.org/Paste/Script/trunk/paste/script/serve.py
which you could crib from or use directly.