Module: Process

Defined in:
activesupport/lib/active_support/core_ext/process/daemon.rb

Class Method Summary collapse

Class Method Details

.daemon(nochdir = nil, noclose = nil) ⇒ Object 



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# File 'activesupport/lib/active_support/core_ext/process/daemon.rb', line 2

def self.daemon(nochdir = nil, noclose = nil)
  exit if fork                     # Parent exits, child continues.
  Process.setsid                   # Become session leader.
  exit if fork                     # Zap session leader. See [1].

  unless nochdir
    Dir.chdir "/"                  # Release old working directory.
  end

  File.umask 0000                  # Ensure sensible umask. Adjust as needed.

  unless noclose
    STDIN.reopen "/dev/null"       # Free file descriptors and
    STDOUT.reopen "/dev/null", "a" # point them somewhere sensible.
    STDERR.reopen '/dev/null', 'a'
  end

  trap("TERM") { exit }

  return 0
end