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#!/usr/bin/python
#
# Upgrade configuration files to a newer template.
import sys
try:
from ipa import ipautil
import krbV
import re
import os
import shutil
import fileinput
except ImportError:
print >> sys.stderr, """\
There was a problem importing one of the required Python modules. The
error was:
%s
""" % sys.exc_value
sys.exit(1)
def backup_file(filename, ext):
"""Make a backup of filename using ext as the extension. Do not overwrite
previous backups."""
if not os.path.isabs(filename):
raise ValueError("Absolute path required")
backupfile = filename + ".bak"
(reldir, file) = os.path.split(filename)
while os.path.exists(backupfile):
backupfile = backupfile + "." + str(ext)
shutil.copy2(filename, backupfile)
def update_conf(sub_dict, filename, template_filename):
template = ipautil.template_file(template_filename, sub_dict)
fd = open(filename, "w")
fd.write(template)
fd.close()
def find_hostname():
"""Find the hostname currently configured in ipa-rewrite.conf"""
filename="/etc/httpd/conf.d/ipa-rewrite.conf"
if os.path.exists(filename):
pattern = "^[\s#]*.*https:\/\/([A-Za-z0-9\.\-]*)\/.*"
p = re.compile(pattern)
for line in fileinput.input(filename):
if p.search(line):
fileinput.close()
return p.search(line).group(1)
fileinput.close()
return None
def find_version(filename):
"""Find the version of a configuration file"""
if os.path.exists(filename):
pattern = "^[\s#]*VERSION\s+([0-9]+)\s+.*"
p = re.compile(pattern)
for line in fileinput.input(filename):
if p.search(line):
fileinput.close()
return p.search(line).group(1)
fileinput.close()
# no VERSION found
return 0
else:
return -1
def upgrade(sub_dict, filename, template):
old = int(find_version(filename))
new = int(find_version(template))
if old < 0:
print "%s not found." % filename
sys.exit(1)
if new < 0:
print "%s not found." % template
if old < new:
backup_file(filename, new)
update_conf(sub_dict, filename, template)
print "Upgraded %s to version %d" % (filename, new)
def main():
try:
krbctx = krbV.default_context()
except krbV.Krb5Error, e:
print "Unable to get default kerberos realm: %s" % e[1]
sys.exit(1)
fqdn = find_hostname()
if fqdn is None:
print "Unable to determine hostname from ipa-rewrite.conf"
sys.exit(1)
sub_dict = { "REALM" : krbctx.default_realm, "FQDN": fqdn }
upgrade(sub_dict, "/etc/httpd/conf.d/ipa.conf", ipautil.SHARE_DIR + "ipa.conf")
upgrade(sub_dict, "/etc/httpd/conf.d/ipa-rewrite.conf", ipautil.SHARE_DIR + "ipa-rewrite.conf")
try:
if __name__ == "__main__":
sys.exit(main())
except SystemExit, e:
sys.exit(e)
except KeyboardInterrupt, e:
sys.exit(1)
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