ruby daemon

gistfile1.rb

def daemonize_app
  if RUBY_VERSION < "1.9"
    exit if fork     # jettison the terminal
    Process.setsid   # establish a new group & session leader (can only be done as a child process)
    exit if fork     # jettison the group leader. now it can't be interrupted from another group or session going down.
    Dir.chdir "/"    # change dir to root to make sure that the dir won't go away during the process run

    # as a demon we won't be needing these...
    STDIN.reopen  "/dev/null"
    STDOUT.reopen "/dev/null", 'a'
    STDERR.reopen "/dev/null", 'a'
  else
    Process.daemon  # :)
  end
end