def METHOD_NAME(pidfile_path):
    """ Exit the program if the named PID file does not exist.
        The specified PID file should be created when we start and
        should continue to be readable while the daemon runs, so
        failure indicates a fatal error.
        """
    if not pidfile_exists(pidfile_path):
        mess = (
            "Aborting: could not read PID file '%(pidfile_path)s'.\n"
            ) % vars()
        sys.stderr.write(mess)
        sys.exit(1)