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Getting status
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The status of the Mailman master process can be queried from the command line.
It's clear at this point that nothing is running.
::

    >>> command = cli('mailman.commands.cli_status.status')

The status is printed to stdout and a status code is returned.

    >>> command('mailman status')
    GNU Mailman is not running

We can simulate the master starting up by acquiring its lock.

    >>> from flufl.lock import Lock
    >>> lock = Lock(config.LOCK_FILE)
    >>> lock.lock()
    >>> ignore = cleanups.callback(lock.unlock, unconditionally=True)

Getting the status confirms that the master is running.

    >>> command('mailman status')
    GNU Mailman is running (master pid: ...

We shut down the master and confirm the status.

    >>> lock.unlock(unconditionally=True)
    >>> command('mailman status')
    GNU Mailman is not running