# File lib/daemons/daemonize.rb, line 39 def call_as_daemon(block, logfile_name = nil, app_name = nil) # we use a pipe to return the PID of the daemon rd, wr = IO.pipe if tmppid = safefork # in the parent wr.close pid = rd.read.to_i rd.close Process.waitpid(tmppid) return pid else # in the child rd.close # Detach from the controlling terminal unless sess_id = Process.setsid raise Daemons.RuntimeException.new('cannot detach from controlling terminal') end # Prevent the possibility of acquiring a controlling terminal trap 'SIGHUP', 'IGNORE' exit if pid = safefork wr.write Process.pid wr.close $0 = app_name if app_name # Release old working directory Dir.chdir "/" close_io() redirect_io(logfile_name) # Split rand streams between spawning and daemonized process srand block.call exit end end