#!/usr/bin/python

# This script mimics the behaviour of tail -f , but has the capablity to execute
# a command whenver a line with a matching pattern in it is found.
# As you probably see, there's no support for regex or anything of that
# flashy nature.
#
# Erik Ljungstrom 15/10/07
import time
import sys
import os
import socket
file = open(sys.argv[2],"r");
node=socket.gethostbyaddr(socket.gethostname())[0]
setdef = os.path.getsize(sys.argv[2])
file.seek(setdef-1)
while 1:
    where = file.tell()
    line = file.readline()
    if not line:
        time.sleep(1)
        file.seek(where)
    else:
        pos = line.find(sys.argv[1])
        if pos >= 0:
            os.system("logger -p local6.crit -t postfix amavisd has bailed out on %s!" % (node))
            sys.exit(1)