Watch ping

ping-watch.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import argparse
import subprocess
import datetime


def _main():
    parser = argparse.ArgumentParser(description="Ping watch")
    parser.add_argument('host')
    parser.add_argument('-l', '--logfile', type=argparse.FileType('at'))
    options = parser.parse_args()

    options.logfile.write(
        "=============== Pinging {} ===============\n".format(options.host))
    p = subprocess.Popen(['ping', options.host],
                         stdout=subprocess.PIPE, encoding='utf-8')
    while True:
        try:
            line = p.stdout.readline()
            now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            if line:
                print(now, line, end='')
                options.logfile.write(now + " " + line)
            else:
                break
        except KeyboardInterrupt:
            p.terminate()
            break


if __name__ == '__main__':
    _main()