Class: Unicorn::Launcher

Inherits:
Object
  • Object
show all
Defined in:
lib/unicorn/launcher.rb

Class Method Summary collapse

Class Method Details

.daemonize! ⇒ Object

We don’t do a lot of standard daemonization stuff:

* umask is whatever was set by the parent process at startup
  and can be set in config.ru and config_file, so making it
  0000 and potentially exposing sensitive log data can be bad
  policy.
* don't bother to chdir("/") here since unicorn is designed to
  run inside APP_ROOT.  Unicorn will also re-chdir() to
  the directory it was started in when being re-executed
  to pickup code changes if the original deployment directory
  is a symlink or otherwise got replaced.



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# File 'lib/unicorn/launcher.rb', line 22

def self.daemonize!
  $stdin.reopen("/dev/null")

  # We only start a new process group if we're not being reexecuted
  # and inheriting file descriptors from our parent
  unless ENV['UNICORN_FD']
    exit if fork
    Process.setsid
    exit if fork

    # $stderr/$stderr can/will be redirected separately in the Unicorn config
    Unicorn::Configurator::DEFAULTS[:stderr_path] = "/dev/null"
    Unicorn::Configurator::DEFAULTS[:stdout_path] = "/dev/null"
  end
  $stdin.sync = $stdout.sync = $stderr.sync = true
end