<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def stop(self):
 """Stop the daemonized process. If the process is already stopped this call should exit successfully. If the process cannot be stopped this call should exit with code STOP_FAILED. """

        if self.pid is None:

            return None

        try:

            while True:

                self.send(signal.SIGTERM)
                time.sleep(0.1)

        except RuntimeError as err:

            if "No such process" in str(err):

                LOG.info("Succesfully stopped the process.")
                return None

            LOG.exception("Failed to stop the process:")
            sys.exit(exit.STOP_FAILED)

        except TypeError as err:

            if "an integer is required" in str(err):

                LOG.info("Succesfully stopped the process.")
                return None

            LOG.exception("Failed to stop the process:")
            sys.exit(exit.STOP_FAILED)