#!/usr/bin/env python2.4
#
# Univention Configuration Registry
#  list modified templates
#
# Copyright 2011 Univention GmbH
# 
# http://www.univention.de/
# 
# All rights reserved.
# 
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
# 
# Binary versions of this program provided by Univention to you as
# well as other copyrighted, protected or trademarked materials like
# Logos, graphics, fonts, specific documentations and configurations,
# cryptographic keys etc. are subject to a license agreement between
# you and Univention and not subject to the GNU AGPL V3.
# 
# In the case you use this program under the terms of the GNU AGPL V3,
# the program is provided in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# 
# You should have received a copy of the GNU Affero General Public
# License with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <http://www.gnu.org/licenses/>.


import sys, md5

def md5sum(fpath):
	m = md5.new()
	try:
		f = file(fpath, 'rb')
	except IOError, e:
		return None

	buf = f.read(65536)
	while len(buf) > 0:
		m.update(buf)
		buf = f.read(65536)
	return m.hexdigest()


try:
	dpkg_status = open('/var/lib/dpkg/status', 'r')
except IOError, e:
	print e
	sys.exit(1)

modified = []
original = []
for line in dpkg_status.readlines():
	if line.startswith(' /etc/univention/templates/files/'):
		# path md5sum (obsolete)
		line = line.strip().split(' ')
		fpath = line[0].strip()
		fmd5 = line[1].strip()

		# skip obsolete and new conffiles
		if len( line ) > 2 or fmd5 == 'newconffile':
			continue

		if not fpath in original and not fpath in modified:
			if fmd5 == md5sum( fpath ):
				original.append( fpath )
			else:
				modified.append( fpath )

for f in modified:
	print f
sys.exit( len(modified) )