Main application loop.

def main():
    """
    Main application loop.
    """

    env = os.environ

    try:
        host = env['SYSLOG_SERVER']
        port = int(env['SYSLOG_PORT'])
        socktype = socket.SOCK_DGRAM if env['SYSLOG_PROTO'] == 'udp' \
            else socket.SOCK_STREAM
    except KeyError:
        sys.exit("SYSLOG_SERVER, SYSLOG_PORT and SYSLOG_PROTO are required.")

    handler = SysLogHandler(
        address=(host, port),
        socktype=socktype,
    )
    handler.setFormatter(PalletFormatter())

    for event_headers, event_data in supervisor_events(sys.stdin, sys.stdout):
        event = logging.LogRecord(
            name=event_headers['processname'],
            level=logging.INFO,
            pathname=None,
            lineno=0,
            msg=event_data,
            args=(),
            exc_info=None,
        )
        event.process = int(event_headers['pid'])
        handler.handle(event)