Daemon/Spawner Protocol Reference

System Shutdown

The system shutdown can be initiated from the daemon by:

  • A user’s sending SIGTERM to the daemon.
  • The manager subprocess terminating.
  • The spawner subprocess terminating.

In any of the above cases:

  • The daemon sends a Message with code Message::Code::Shutdown to the manager, if it is not dead.
  • The manager performs the shutdown actions and terminates.
  • The daemon detects that the manager terminated.
  • The daemon sends a Message with code Message::Code::Shutdown to the spawner, if it is not dead.
  • The spawner performs the shutdown actions and terminates.
  • The daemon terminates.