From: Nobuyoshi Nakada <nobu@...>
Date: 2009-02-20T13:09:13+09:00
Subject: Re: a little daemon daemonizes, but hangs the logout

Hi,

At Thu, 19 Feb 2009 23:25:20 +0900,
Brian Candler wrote in [ruby-talk:328745]:
> And there is this one from rackup (part of the rack package)
> 
> if daemonize
>   if RUBY_VERSION < "1.9"

Assuming it's possible to check a feature by version number is
an evil habitat.  You can just do it by

  unless defined?(Process.daemon)

or, define your own Process.daemon.

  module Process
    unless defined?(daemon)
      def self.daemon(nochdir=nil, noclose=nil)
    	exit! if fork
    	Process.setsid
	unless nochdir
    	  Dir.chdir "/"
	end
	unless noclose
    	  STDIN.reopen "/dev/null"
    	  STDOUT.reopen "/dev/null", "w"
    	  STDERR.reopen STDOUT
        end
      end
    end
  end

-- 
Nobu Nakada