Python and Daemons

[ruud de rooij]

> > def daemonize():
> >     "cause this process to becaome a daemon"
> >     if os.fork() != 0:
> >         os._exit(0)
> >     os.setsid()
> >     if os.fork() != 0:      # 2nd fork is widely recommended
> >         os._exit(0)         # though not always needed
> >     debugmsg("daemonized")

> Can someone say why the 2nd fork is widely recommneded?

http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC16

3. fork() again so the parent, (the session group leader), can
   exit. This means that we, as a non-session group leader, can never
   regain a controlling terminal.

        - ruud
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ruud de rooij | *@spam.ruud.org | http://ruud.org