Kill child by timeout

time-keeper.py

"""
Simple watchdog which kills the command affter timeout.
You can specify the timeout in seconds for kill by env-variable TIMEOUT
Example:
    TIMEOUT=300 python time-keeper.py this-will-hang-up-but-gonna-be-killed-in-5-mins.exe
"""

import logging
import os
import subprocess
import sys
import time

logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s %(levelname)s %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S',
    filename='time-keeper.log',
)
logger = logging.getLogger(__name__)


def run(cmd):
    logger.info('Run process: %s', ' '.join(cmd))
    return subprocess.Popen(cmd)


def main(cmd, timeout=10, exit_code=0):
    start = time.time()
    pipe = run(cmd)
    while True:
        return_code = pipe.poll()
        if return_code is not None:
            return return_code
        elif (time.time() - start) < timeout:
            time.sleep(1)
            continue

        pipe.kill()
        return exit_code


if __name__ == '__main__':
    if len(sys.argv) < 2:
        print(__doc__)
        exit(1)

    cmd = sys.argv[1:]
    timeout = int(os.environ.get('TIMEOUT', 10))
    exit(main(cmd, timeout=timeout))