#!/usr/bin/python3
 import sys
 import os
 import re
 from pygtail import Pygtail

 log_file    = '/var/log/auth.log'

 offset_file = os.path.join(os.getenv("HOME"),"data",
   os.path.basename(sys.argv[0]) + "." +
   os.path.basename(log_file) +
   ".offset" )

 for line in Pygtail(log_file, offset_file=offset_file):
     if not re.search('CRON',line) and \
       not re.search('Connection closed',line):
         sys.stdout.write(line)