Module: SimpleDaemon::Controller

Defined in:
lib/simple-daemon.rb

Class Method Summary collapse

Class Method Details

.daemonize(daemon) ⇒ Object 



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# File 'lib/simple-daemon.rb', line 41

def self.daemonize(daemon)
  case !ARGV.empty? && ARGV[0]
  when 'start'
    start(daemon)
  when 'stop'
    stop(daemon)
  when 'restart'
    stop(daemon)
    start(daemon)
  else
    puts "Invalid command. Please specify start, stop or restart."
    exit
  end
end

.start(daemon) ⇒ Object 



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# File 'lib/simple-daemon.rb', line 56

def self.start(daemon)
  fork do
    Process.setsid
    exit if fork
    if File.file?(daemon.pid_fn)
      puts "Pid file #{daemon.pid_fn} already exists.  Not starting."
      exit 1
    end
    PidFile.store(daemon, Process.pid)
    Dir.chdir SimpleDaemon::WORKING_DIRECTORY
    File.umask 0000
    log = File.new("#{daemon.classname}.log", "a")
    log.sync = true
    STDIN.reopen "/dev/null"
    STDOUT.reopen log
    STDERR.reopen STDOUT
    trap("TERM") {daemon.stop; exit}
    daemon.start
  end
  puts "Daemon started."
end

.stop(daemon) ⇒ Object 



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# File 'lib/simple-daemon.rb', line 78

def self.stop(daemon)
  if !File.file?(daemon.pid_fn)
    puts "Pid file not found. Is the daemon started?"
    exit
  end
  pid = PidFile.recall(daemon)
  FileUtils.rm(daemon.pid_fn)
  pid && Process.kill("TERM", pid)
rescue Errno::ESRCH
  puts "Pid file found, but process was not running. The daemon may have died."
end