hot-restarter.py 文件源码

def main():
  """ Script main. This script is designed so that a process watcher like runit or monit can watch
      this process and take corrective action if it ever goes away. """

  print ("starting hot-restarter with target: {}".format(sys.argv[1]))

  signal.signal(signal.SIGTERM, sigterm_handler)
  signal.signal(signal.SIGHUP, sighup_handler)
  signal.signal(signal.SIGCHLD, sigchld_handler)
  signal.signal(signal.SIGUSR1, sigusr1_handler)

  # Start the first child process and then go into an endless loop since everything else happens via
  # signals.
  fork_and_exec()
  while True:
    time.sleep(60)