import time
import signal 
import os
import datetime

_sleeptime=int(os.environ['SLEEP_TIME'])

def sighandler(signum,frame):
  print('Signal handler was called with signal',signum)

def main():
  while True:
    print('{0} pybusybox going to sleep for {1} sec'.format(datetime.datetime.now(),_sleeptime))
    time.sleep(_sleeptime)

if __name__ == '__main__':
  signal.signal(signal.SIGTERM,sighandler)
  print('signum {0} registered'.format(signal.SIGTERM))
  signal.signal(signal.SIGINT,sighandler)
  print('signum {0} registered'.format(signal.SIGINT))
  main()