#!/usr/bin/python3 ''' postfix-add-filter - A script to append new services to Postfix master.cf to simplify integration of content filters. Copyright (c) 2008 Scott Kitterman Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ''' __author__ = "Scott Kitterman" __email__ = "scott@kitterman.com" __version__ = "0.11: August 2, 2008" import sys import shutil import os import time def makeservice(name, port): # Recommendations from amavisd-new 2.6.0 documentation plus chrooted to # match Debian Postfix package defaults. header = """# ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # ========================================================================== # Added using postfix-add-filter script: """ smtp = ("""%s unix - - - - 2 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes -o smtp_tls_note_starttls_offer=no """ % (name)) smtpd = ("""127.0.0.1:%s inet n - - - - smtpd -o content_filter= -o smtpd_delay_reject=no -o smtpd_client_restrictions=permit_mynetworks,reject -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o smtpd_data_restrictions=reject_unauth_pipelining -o smtpd_end_of_data_restrictions= -o smtpd_restriction_classes= -o mynetworks=127.0.0.0/8 -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 -o smtpd_client_connection_count_limit=0 -o smtpd_client_connection_rate_limit=0 -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks,no_milters -o local_header_rewrite_clients= -o smtpd_milters= -o local_recipient_maps= -o relay_recipient_maps= """ % (port)) additions = header + smtp + smtpd return (additions) USAGE = """To add a new filter service to your master.cf: % sudo postfix-add-filter {smtp client name} {smtpd service port} Example: % sudo postfix-add-filter amavisfeed 10025 Adds the following to master.cf: """ + makeservice('amavisfeed', '10025') + """ To output this usage message: % postfix-add-filter """ if __name__ == '__main__': import sys if len(sys.argv) < 3: print(USAGE + "\n") elif len(sys.argv) == 3: servicename = sys.argv[1] listenerport = sys.argv[2] # Read in master.cf and check to make sure specified names aren't # already used masterfile = open('/etc/postfix/master.cf', mode='r') master = masterfile.readlines() masterfile.close() bailout = False for line in master: if servicename in line or listenerport in line: # Service name or listen port already used, print error and bail print('Selected service name, %s, or smtpd port, %s, \ already in master.cf. Master.cf not updated.\n' % (servicename, listenerport)) bailout = True break if not bailout: # Make backup copy backupname = '/etc/postfix/master.cf.' + str(int(time.time())) shutil.copy2('/etc/postfix/master.cf', backupname) # Make working copy shutil.copy2('/etc/postfix/master.cf', \ '/etc/postfix/master.cf.working') # Add stuff in stuff = makeservice(servicename, listenerport) # Append stuff to the working copy: newmaster = open('/etc/postfix/master.cf.working', mode='a') newmaster.writelines(stuff) newmaster.close() # Put working copy in place. shutil.move('/etc/postfix/master.cf.working', \ '/etc/postfix/master.cf') else: print(USAGE + '\n')