A generic module for daemonizing a process

Methods
S
Class Public methods
start()

Performs the standard operations for daemonizing a process. Runs a block, if given.

Source: show | on GitHub 

# File lib/webrick/server.rb, line 45
def Daemon.start
  exit!(0) if fork
  Process::setsid
  exit!(0) if fork
  Dir::chdir("/")
  File::umask(0)
  STDIN.reopen("/dev/null")
  STDOUT.reopen("/dev/null", "w")
  STDERR.reopen("/dev/null", "w")
  yield if block_given?
end