OpenStack Study: systemd.py

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def _sd_notify(msg):

    sysd = os.getenv('NOTIFY_SOCKET')

    if sysd:

        sock = socket.socket(socket.AF_UNIX, socket.SOCK_DGRAM)

        if sysd.startswith('@'):

            # abstract namespace socket

            sysd = '\0%s' % sysd[1:]

        sock.connect(sysd)

        sock.sendall(msg)

        sock.close()

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def notify():

    _sd_notify('READY=1')

if __name__ == '__main__':

    notify()