Module: DaemonOgre::Daemon
- Defined in:
- lib/daemon-ogre/daemon.rb
Class Method Summary collapse
- .init ⇒ Object (also: new)
-
.kill ⇒ Object
Try and read the existing pid from the pid file and signal the process.
- .kill_by_name ⇒ Object
-
.redirect ⇒ Object
Send stdout and stderr to log files for the child process.
-
.start(pid) ⇒ Object
Checks to see if the current process is the child process and if not will update the pid file with the child pid.
- .stop ⇒ Object
- .term_kill ⇒ Object
- .terminate ⇒ Object
-
.write(pid) ⇒ Object
Attempts to write the pid of the forked process to the pid file.
Class Method Details
.init ⇒ Object Also known as: new
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# File 'lib/daemon-ogre/daemon.rb', line 154 def init if DARGV.terminate? stop end if DARGV.daemonize? start( ::Kernel.fork ) end end |
.kill ⇒ Object
Try and read the existing pid from the pid file and signal the process. Returns true for a non blocking status.
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# File 'lib/daemon-ogre/daemon.rb', line 36 def kill opid = OPTS.pidfile.to_i Process.kill 'HUP', opid.to_i true rescue Errno::ENOENT $stdout.puts "#{pidfile} did not exist: Errno::ENOENT" if $DEBUG true rescue Errno::ESRCH $stdout.puts "The process #{opid} did not exist: Errno::ESRCH" if $DEBUG true rescue Errno::EPERM $stderr.puts "Lack of privileges to manage the process #{opid}: Errno::EPERM" if $DEBUG false rescue ::Exception => e $stderr.puts "While signaling the PID, unexpected #{e.class}: #{e}" if $DEBUG false end |
.kill_by_name ⇒ Object
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# File 'lib/daemon-ogre/daemon.rb', line 108 def kill_by_name # name switch target_name ||= $0 $0 = "ruby_tmp_process" app_state= false start_time= Time.now while `ps aux | grep #{target_name}`.split(' ')[1] != "" || (Time.now - start_time) < 6 begin Process.kill "TERM",`ps aux | grep #{target_name}`.split(' ')[1].to_i app_state= true rescue Errno::ESRCH $stdout.puts "The process #{target_name} did not exist: Errno::ESRCH" if $DEBUG break rescue Errno::EPERM $stderr.puts "Lack of privileges to manage the process #{target_name}: Errno::EPERM" if $DEBUG break rescue ::Exception => e $stderr.puts "While signaling the PID, unexpected #{e.class}: #{e}" if $DEBUG break end end # name switch back begin $0 = target_name end return app_state end |
.redirect ⇒ Object
Send stdout and stderr to log files for the child process
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# File 'lib/daemon-ogre/daemon.rb', line 57 def redirect var= 3 begin $stdin.reopen File.join('','dev','null') $stdout.reopen OPTS.out__path__ $stderr.reopen OPTS.err__path__ $stdout.sync = $stderr.sync = true rescue Errno::ENOENT => ex var -= 1 retry if var > 0 raise ex.class,ex end end |
.start(pid) ⇒ Object
Checks to see if the current process is the child process and if not will update the pid file with the child pid.
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# File 'lib/daemon-ogre/daemon.rb', line 11 def start pid unless pid.nil? raise "Fork failed" if pid == -1 OPTS.pidfile= pid ::Kernel.exit else redirect end end |
.stop ⇒ Object
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# File 'lib/daemon-ogre/daemon.rb', line 147 def stop self.terminate ::Process.exit! end |
.term_kill ⇒ Object
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# File 'lib/daemon-ogre/daemon.rb', line 75 def term_kill unless OPTS.pidfile.nil? begin STDOUT.puts("PidFile found, processing...") if $DEBUG Process.kill('TERM', OPTS.pidfile.to_i) return true rescue Exception => ex STDOUT.puts "Exception happened on terminating process: #{ex.class}, #{ex}" if $DEBUG return false end end end |
.terminate ⇒ Object
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# File 'lib/daemon-ogre/daemon.rb', line 94 def terminate # kill methods app_killed= false [:kill,:term_kill,:kill_by_name].each do |method_name| app_killed= self.__send__ method_name break if app_killed end OPTS.pidfile= nil return app_killed end |
.write(pid) ⇒ Object
Attempts to write the pid of the forked process to the pid file.
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# File 'lib/daemon-ogre/daemon.rb', line 22 def write pid OPTS.pid= pid File.open pidfile, "a+" do |new_line| new_line.write "#{pid}\n" end rescue ::Exception => e $stderr.puts "While writing the PID to file, unexpected #{e.class}: #{e}" Process.kill "HUP", pid end |