Module: Daemon
- Defined in:
- lib/serverside/daemon.rb,
lib/serverside/cluster.rb
Overview
The Daemon module takes care of starting and stopping daemons.
Defined Under Namespace
Modules: PidFile Classes: Base, Cluster
Constant Summary collapse
- WorkingDirectory =
FileUtils.pwd
Class Method Summary collapse
-
.control(daemon, cmd = nil) ⇒ Object
Controls a daemon according to the supplied command or command-line parameter.
-
.start(daemon) ⇒ Object
Starts the daemon by forking and bcoming session leader.
-
.stop(daemon) ⇒ Object
Stops the daemon by sending it a TERM signal.
Class Method Details
.control(daemon, cmd = nil) ⇒ Object
Controls a daemon according to the supplied command or command-line parameter. If an invalid command is specified, an error is raised.
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# File 'lib/serverside/daemon.rb', line 31 def self.control(daemon, cmd = nil) case (cmd || (!ARGV.empty? && ARGV[0]) || :nil).to_sym when :start start(daemon) when :stop stop(daemon) when :restart stop(daemon) start(daemon) else raise 'Invalid command. Please specify start, stop or restart.' end end |
.start(daemon) ⇒ Object
Starts the daemon by forking and bcoming session leader.
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# File 'lib/serverside/daemon.rb', line 46 def self.start(daemon) fork do Process.setsid exit if fork PidFile.store(daemon, Process.pid) Dir.chdir WorkingDirectory File.umask 0000 STDIN.reopen "/dev/null" STDOUT.reopen "/dev/null", "a" STDERR.reopen STDOUT trap("TERM") {daemon.stop; exit} daemon.start end end |