From: Kirk Haines <khaines@...>
Date: 2002-06-14T23:36:01+09:00
Subject: Re: daemon

> How do I make a script run as a deamon in ruby? I'm trying to create a
> variation on fetchmail and hence I want it to run in daemon mode, when
> invoked by root or so 'optioned'


Here's one way:

def startDaemon
  if (child_pid = fork)
    #I'm the parent.  Do whatever a parent might do, such as store the
    #PID in a file or report it to STDOUT so that something else can
    #capture the info and store it.
    puts "PID #{child_pid}"
    exit
  end

  #Now, I am the child.  I want to be free of my parent.
  Process.setsid
end


Call startDaemon(), and when it returns, it will be the daemonized child
process that returns.


Kirk Haines