[Twisted-Python] how to daemonize twisted...and detatch from shell process

[exarkun at twistedmatrix.com]

On 6 Oct, 10:30 pm, schenette at gmail.com wrote:
>Hi,
>
>I'm attempting to create an ubuntu service that when started will run 
>in
>the background processing beanstalk jobs.
>I've taken the code from beanstalk-client twisted to act as my 
>beanstalk
>client (
>https://github.com/dustin/beanstalk-client- 
>twisted/blob/master/beanstalk.py)
>
>The issue I'm having is how do I set up my service (ocapi.py) so that 
>when
>the daemon (ocapi) starts it detaches from the process, which isn't'
>happening right now.

Use twistd, which comes with daemonization features.  From the looks of 
your code, you're halfway there already.

  http://twistedmatrix.com/documents/current/core/howto/basics.html#auto1
  http://twistedmatrix.com/documents/current/core/howto/application.html

Jean-Paul
>ocapi.py (service) <--this is what should detach and I put it in
>/usr/sbin/ocapi.py code found at http://pastebin.com/29VnXnrm
>ocapi (daemon) <-- goes int /etc/init.d/ocapi code found at
>http://pastebin.com/0QgRfTfu
>
>stephan at oc:~$ sudo /etc/init.d/ocapi start
>* Starting ocapi... Removing stale pidfile /var/run/ocapi.pid
>Connected!
>
>...problem is I don't get my shell prompt back when i start the 
>service,
>meaning it didn't detach from the parent process...hopefully someone 
>can
>shed some light on this.
>Thanks,
>Stephan