/usr/local/bin/hdhomerun_check.py

#!/usr/bin/python3

''' See if the HD Homerun box is accessable and running '''

import subprocess
import sys
import logging
from time import sleep
from datetime import datetime

ATTEMPTS = 21
DELAY = 2


def get_elapsed_time(start):
    ''' Calculate the time spent waiting for the HDHR to come up '''

    delta = datetime.utcnow() - start
    rounded_delta = '{:.3f}'.format(delta.seconds +
                                    (delta.microseconds / 1000000))
    return rounded_delta


def main():
    ''' Try to discover the HDHR '''

    attempt = 0  # Shut up pylint.
    command = 'hdhomerun_config discover'
    logger = logging.getLogger(command)

    logging.basicConfig(filename='/var/log/mythtv/hdhr_discovery.log',
                        filemode='a',
                        format='%(asctime)s %(levelname)s\t%(message)s',
                        datefmt='%Y-%m-%d %H:%M:%S',
                        level=logging.INFO)

    logger.info('Starting HD Homerun discovery')

    start = datetime.utcnow()

    for attempt in range(1, ATTEMPTS):
        try:
            sproc = subprocess.Popen(command, stdout=subprocess.PIPE,
                                     shell=True)
            sproc.communicate()

        except KeyboardInterrupt:
            sys.exit(2)

        if sproc.returncode != 0:
            logger.warning('%s failed, return code = %d.', command,
                           sproc.returncode)
            sleep(DELAY)
        else:
            logger.info('Found HD Homerun. Seconds=%s, attempts=%d.',
                        get_elapsed_time(start), attempt)
            sys.exit(0)

    logger.error('Couldn\'t find HD Homerun. Seconds=%s, attempts=%d.',
                 get_elapsed_time(start), attempt)


if __name__ == '__main__':
    main()

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