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Versions: 29
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Contents
module Capricorn
module Daemon
class Base
def self.daemonize(&block)
Capricorn::Daemon::Controller.start(self,&block)
end
end
module PidFile
def self.store(pid)
File.open(self.pid_file, 'w') {|f| f << pid}
end
def self.recall
IO.read(self.pid_file).to_i rescue nil
end
def self.destroy
FileUtils.rm(self.pid_file) if self.exist?
end
def self.pid_file
Capricorn.system.path("Server.pid")
end
def self.exist?
File.file?(self.pid_file)
end
end
module Controller
def self.start(daemon, &block)
fork do
Process.setsid
exit if fork
if PidFile.exist?
puts "Pid file #{PidFile.pid_file} already exists. Not starting."
exit 1
end
setup_child
regitser_handlers(daemon, &block)
daemon.start
end
puts "Daemon started."
end
def self.stop
if !Capricorn::Daemon::PidFile.exist?
puts "Pid file not found. Is the daemon started?"
exit
end
pid = Capricorn::Daemon::PidFile.recall
pid && Process.kill("TERM", pid)
rescue Errno::ESRCH
puts "Pid file found, but process was not running. The daemon may have died."
end
private
def self.setup_child
Capricorn::Daemon::PidFile.store(Process.pid)
Dir.chdir Capricorn.system.root
File.umask 0000
Capricorn::ExceptionHandler.redirect_std
end
def self.regitser_handlers(daemon, &block)
trap("TERM") { daemon.stop; exit }
at_exit { Capricorn::Daemon::PidFile.destroy if $master }
at_exit(&block) if block
end
end
end
end
Version data entries
29 entries across 29 versions & 2 rubygems