python_pinger.git

1) #!/usr/bin/python3
2) #
3) # Since this is meant to be run as a daemon, do not use #!/usr/bin/env python3,
4) # because the process name would then be python3, not based on __FILE__.
5) #
6) # [filename] -d 3 192.168.1.1 192.168.1.12 &
7) # disown [jobid]
8) import os
9) import sys
10) import subprocess
11) import time
12) from argparse import ArgumentParser
13) import threading
14) import queue
15) 

16) pinger_lock = threading.Lock()
17) 

18) 
19) def pinger(host):
20)     """Executes one ping, prints if there was a change, exits thread."""
21)     now = time.localtime()
22)     success = ping(host)

23)     with pinger_lock:
24)         # Access to _results needs to be serialized
25)         need_update = success != _results[host]
26)         if need_update:
27)             _results[host] = success
28)     if need_update: