#!/usr/bin/env python
# Ashish Disawal, 18 Nov 2010
# This program reads a file, search for lines starting with "MY_NUM[0]", where 0
# varies. It then replaces 0 with a serialized number.
import re, sys, os
file = sys.argv[1]
tmp_file = ".tmp_" + file
last_file = ".last_" + file
fd = open(file, 'r')
tmp_fd = open(tmp_file, 'w')
count = 0
for line in fd.readlines():
if re.match("DST_IP", line):
replace_str = "DST_IP[" + str(count) + "]"
count = count + 1
tmp_fd.write(re.sub("DST_IP\[\d+\]", replace_str, line))
else:
tmp_fd.write(line)
print 'Backing up current file "' + file + '" as "' + last_file + '"'
os.rename(file, last_file)
print 'Moving tmp file "' + tmp_file + '" as "' + file + '"'
os.rename(tmp_file, file)
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