Starting and stopping Mailman

The Mailman daemon processes can be started and stopped from the command line.

Set up

All we care about is the master process; normally it starts a bunch of runners, but we don’t care about any of them, so write a test configuration file for the master that disables all the runners.

>>> from mailman.commands.tests.test_control import make_config


>>> from mailman.commands.cli_control import Start
>>> start = Start()
>>> class FakeArgs:
...     force = False
...     run_as_user = True
...     quiet = False
...     config = make_config()
>>> args = FakeArgs()

Starting the daemons prints a useful message and starts the master watcher process in the background.

>>> start.process(args)
Starting Mailman's master runner
>>> from mailman.commands.tests.test_control import find_master

The process exists, and its pid is available in a run time file.

>>> pid = find_master()
>>> pid is not None


You can also stop the master watcher process from the command line, which stops all the child processes too.

>>> from mailman.commands.cli_control import Stop
>>> stop = Stop()
>>> stop.process(args)
Shutting down Mailman's master runner

>>> from datetime import datetime, timedelta
>>> import os
>>> import time
>>> import errno
>>> def bury_master():
...     until = timedelta(seconds=2) +
...     while < until:
...         time.sleep(0.1)
...         try:
...             os.kill(pid, 0)
...             os.waitpid(pid, os.WNOHANG)
...         except OSError as error:
...             if error.errno == errno.ESRCH:
...                 # The process has exited.
...                 print('Master process went bye bye')
...                 return
...             else:
...                 raise
...     else:
...         raise AssertionError('Master process lingered')

>>> bury_master()
Master process went bye bye

XXX We need tests for restart (SIGUSR1) and reopen (SIGHUP).