From: Gennady <gfb@...>
Date: 2003-12-20T08:44:17+09:00
Subject: Re: 'Daemonizing' a script

What do you mean by "silently croaks"? Like nothing happens, just a 
prompt? Did you check your processes? As a result of this code there 
must be a detached process with parent id 1 that do not have 
controlling terminal. Try:

ps -ef |grep ruby

and scan for a corresponding process (it is Unix, isn't it? It may not 
work on Windows).

On Dec 19, 2003, at 15:11, Carl Youngblood wrote:

> I got this code from Webrick::Daemon that is supposed to turn a ruby 
> script into a daemon.  Though I don't fully understand it, I guess 
> that means that it detaches it from the terminal that called it.  The 
> thing is, when I run the script without the daemonizing code it works 
> fine, but when I add the following code it silently croaks.  Does 
> anybody know what might be going wrong?
>
> Thanks,
> Carl Youngblood
>
> #------------------------------
>
> # the following lines "daemonize" this script
> exit!(0) if fork
> Process::setsid
> exit!(0) if fork
> Dir::chdir("/")
> File::umask(0)
> [ STDIN, STDOUT, STDERR ].each{|io|
>     io.reopen("/dev/null", "r+")
> }
>
> # This is a session storage daemon which can be shared by multiple FCGI
> # processes. It's just a hash which is enabled for DRb access.
>
> require 'drb'
> require 'include/localsettings'
>
> session_data = Hash.new
> DRb.start_service("druby://127.0.0.1:#{SESSION_PORT.to_s}", 
> session_data)
> DRb.thread.join
>
>
>

Sincerely,
Gennady Bystritsky