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Run some command every x seconds (Python recipe) by Rutger Saalmink
ActiveState Code (http://code.activestate.com/recipes/578673/)

Sometimes it comes in handy to run some command every minute or hour. For example, have some process check your ip address every minute with 'ifconfig' or run some purgescript at midnight through 'sqlplus.exe @purge_aux_table'.

Python, 31 lines
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import os
import time

def print_ts(message):
    print "[%s] %s"%(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()), message)

def run(interval, command):
    print_ts("-"*100)
    print_ts("Command %s"%command)
    print_ts("Starting every %s seconds."%interval)
    print_ts("-"*100)

    while True:
        try:
            # sleep for the remaining seconds of interval
            time_remaining = interval-time.time()%interval
            print_ts("Sleeping until %s (%s seconds)..."%((time.ctime(time.time()+time_remaining)), time_remaining))
            time.sleep(time_remaining)
            print_ts("Starting command.")

            # execute the command
            status = os.system(command)
            print_ts("-"*100)
            print_ts("Command status = %s."%status)
        except Exception, e:
            print e

if __name__=="__main__":
    interval = 5
    command = r"ipconfig"
    run(interval, command)
Tags: command, iterative, os, run