[695] | 1 | #! /usr/bin/env python |
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[1144] | 2 | # -*- coding: ISO-8859-15 -*- |
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[695] | 3 | |
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| 4 | # PyKota accounting filter |
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| 5 | # |
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[952] | 6 | # PyKota - Print Quotas for CUPS and LPRng |
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[695] | 7 | # |
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| 8 | # (c) 2003 Jerome Alet <alet@librelogiciel.com> |
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[873] | 9 | # This program is free software; you can redistribute it and/or modify |
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| 10 | # it under the terms of the GNU General Public License as published by |
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| 11 | # the Free Software Foundation; either version 2 of the License, or |
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| 12 | # (at your option) any later version. |
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[695] | 13 | # |
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[873] | 14 | # This program is distributed in the hope that it will be useful, |
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| 15 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | # GNU General Public License for more details. |
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| 18 | # |
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| 19 | # You should have received a copy of the GNU General Public License |
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| 20 | # along with this program; if not, write to the Free Software |
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| 21 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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[695] | 22 | # |
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| 23 | # $Id$ |
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| 24 | # |
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| 25 | # $Log$ |
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[1152] | 26 | # Revision 1.42 2003/10/08 21:41:38 jalet |
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| 27 | # External policies for printers works ! |
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| 28 | # We can now auto-add users on first print, and do other useful things if needed. |
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| 29 | # |
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[1144] | 30 | # Revision 1.41 2003/10/07 09:07:27 jalet |
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| 31 | # Character encoding added to please latest version of Python |
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| 32 | # |
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[1124] | 33 | # Revision 1.40 2003/09/04 08:38:56 jalet |
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| 34 | # Added an exception catch to ensure clean close of database even in |
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| 35 | # case of TypeError too. |
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| 36 | # |
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[1117] | 37 | # Revision 1.39 2003/08/18 16:35:28 jalet |
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| 38 | # New pychecker pass, on the tools this time. |
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| 39 | # |
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[1116] | 40 | # Revision 1.38 2003/08/18 16:20:59 jalet |
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| 41 | # Improvement of the printing system detection code. |
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| 42 | # |
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[1113] | 43 | # Revision 1.37 2003/07/29 20:55:17 jalet |
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| 44 | # 1.14 is out ! |
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| 45 | # |
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[1080] | 46 | # Revision 1.36 2003/07/10 06:09:52 jalet |
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| 47 | # Incorrect documentation string |
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| 48 | # |
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[1041] | 49 | # Revision 1.35 2003/06/25 14:10:01 jalet |
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| 50 | # Hey, it may work (edpykota --reset excepted) ! |
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| 51 | # |
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[1026] | 52 | # Revision 1.34 2003/06/13 18:54:17 jalet |
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| 53 | # Bug with remote jobs and LPRng fixed. |
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| 54 | # |
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[1004] | 55 | # Revision 1.33 2003/05/28 13:51:38 jalet |
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| 56 | # Better handling of errors |
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| 57 | # |
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[1000] | 58 | # Revision 1.32 2003/05/27 23:00:20 jalet |
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| 59 | # Big rewrite of external accounting methods. |
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| 60 | # Should work well now. |
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| 61 | # |
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[976] | 62 | # Revision 1.31 2003/04/30 13:36:39 jalet |
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| 63 | # Stupid accounting method was added. |
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| 64 | # |
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[975] | 65 | # Revision 1.30 2003/04/29 22:03:38 jalet |
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| 66 | # Better error handling. |
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| 67 | # |
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[973] | 68 | # Revision 1.29 2003/04/29 18:37:54 jalet |
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| 69 | # Pluggable accounting methods (actually doesn't support external scripts) |
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| 70 | # |
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[966] | 71 | # Revision 1.28 2003/04/26 08:41:24 jalet |
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| 72 | # Small code reorganisation (UNTESTED) to allow pluggable accounting |
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| 73 | # methods in the future. |
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| 74 | # |
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[963] | 75 | # Revision 1.27 2003/04/25 09:23:47 jalet |
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| 76 | # Debug message passed through ! |
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| 77 | # |
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[962] | 78 | # Revision 1.26 2003/04/25 08:23:23 jalet |
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| 79 | # Multiple tries to get the printer's internal page counter, waits for |
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| 80 | # one minute maximum for the printer to warm up, actually. |
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| 81 | # |
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[956] | 82 | # Revision 1.25 2003/04/24 11:53:48 jalet |
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| 83 | # Default policy for unknown users/groups is to DENY printing instead |
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| 84 | # of the previous default to ALLOW printing. This is to solve an accuracy |
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| 85 | # problem. If you set the policy to ALLOW, jobs printed by in nexistant user |
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| 86 | # (from PyKota's POV) will be charged to the next user who prints on the |
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| 87 | # same printer. |
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| 88 | # |
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[952] | 89 | # Revision 1.24 2003/04/23 22:13:56 jalet |
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| 90 | # Preliminary support for LPRng added BUT STILL UNTESTED. |
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| 91 | # |
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[915] | 92 | # Revision 1.23 2003/04/15 11:30:57 jalet |
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| 93 | # More work done on money print charging. |
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| 94 | # Minor bugs corrected. |
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| 95 | # All tools now access to the storage as priviledged users, repykota excepted. |
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| 96 | # |
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[914] | 97 | # Revision 1.22 2003/04/15 11:09:04 jalet |
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| 98 | # Small bug was fixed when a printer was never used and its internal |
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| 99 | # page counter is not accessible. |
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| 100 | # |
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[909] | 101 | # Revision 1.21 2003/04/12 17:20:14 jalet |
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| 102 | # Better formula for HP workaround |
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| 103 | # |
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[908] | 104 | # Revision 1.20 2003/04/12 16:58:28 jalet |
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| 105 | # The workaround for HP printers was not correct, and there's probably no |
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| 106 | # correct way to workaround the problem because we can't save the internal |
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| 107 | # page counter in real time. The last job's size is unconditionnally set to |
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| 108 | # 5 pages in this case. |
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| 109 | # |
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[902] | 110 | # Revision 1.19 2003/04/11 08:56:49 jalet |
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| 111 | # Comment |
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| 112 | # |
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[901] | 113 | # Revision 1.18 2003/04/11 08:50:39 jalet |
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| 114 | # Workaround for the HP "feature" of saving the page counter to NVRAM |
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| 115 | # only every time 10 new pages are printed... |
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| 116 | # Workaround for printers with volatile page counters. |
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| 117 | # |
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[900] | 118 | # Revision 1.17 2003/04/10 21:47:20 jalet |
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| 119 | # Job history added. Upgrade script neutralized for now ! |
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| 120 | # |
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[887] | 121 | # Revision 1.16 2003/04/08 20:38:08 jalet |
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| 122 | # The last job Id is saved now for each printer, this will probably |
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| 123 | # allow other accounting methods in the future. |
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| 124 | # |
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[873] | 125 | # Revision 1.15 2003/03/29 13:45:27 jalet |
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| 126 | # GPL paragraphs were incorrectly (from memory) copied into the sources. |
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| 127 | # Two README files were added. |
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| 128 | # Upgrade script for PostgreSQL pre 1.01 schema was added. |
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| 129 | # |
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[832] | 130 | # Revision 1.14 2003/03/07 22:16:57 jalet |
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| 131 | # Algorithmically incorrect : last user quota wasn't updated if current |
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| 132 | # user wasn't allowed to print. |
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| 133 | # |
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[826] | 134 | # Revision 1.13 2003/02/27 23:59:28 jalet |
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| 135 | # Stupid bug wrt exception handlingand value conversion |
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| 136 | # |
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[825] | 137 | # Revision 1.12 2003/02/27 23:48:41 jalet |
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| 138 | # Correctly maps PyKota's log levels to syslog log levels |
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| 139 | # |
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[824] | 140 | # Revision 1.11 2003/02/27 22:55:20 jalet |
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| 141 | # WARN log priority doesn't exist. |
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| 142 | # |
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[823] | 143 | # Revision 1.10 2003/02/27 22:43:21 jalet |
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| 144 | # Missing import |
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| 145 | # |
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[822] | 146 | # Revision 1.9 2003/02/27 22:40:26 jalet |
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| 147 | # Correctly handles cases where the printer is off. |
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| 148 | # |
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[772] | 149 | # Revision 1.8 2003/02/09 12:56:53 jalet |
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| 150 | # Internationalization begins... |
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| 151 | # |
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[740] | 152 | # Revision 1.7 2003/02/07 10:23:48 jalet |
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| 153 | # Avoid a possible future name clash |
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| 154 | # |
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[728] | 155 | # Revision 1.6 2003/02/06 22:54:33 jalet |
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| 156 | # warnpykota should be ok |
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| 157 | # |
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[704] | 158 | # Revision 1.5 2003/02/05 22:45:25 jalet |
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| 159 | # Forgotten import |
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| 160 | # |
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[703] | 161 | # Revision 1.4 2003/02/05 22:42:51 jalet |
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| 162 | # Typo |
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| 163 | # |
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[701] | 164 | # Revision 1.3 2003/02/05 22:38:39 jalet |
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| 165 | # Typo |
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| 166 | # |
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[699] | 167 | # Revision 1.2 2003/02/05 22:16:20 jalet |
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| 168 | # DEVICE_URI is undefined outside of CUPS, i.e. for normal command line tools |
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| 169 | # |
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[695] | 170 | # Revision 1.1 2003/02/05 21:28:17 jalet |
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| 171 | # Initial import into CVS |
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| 172 | # |
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| 173 | # |
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| 174 | # |
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| 175 | |
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| 176 | import sys |
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[704] | 177 | import os |
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[695] | 178 | |
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| 179 | from pykota.tool import PyKotaTool, PyKotaToolError |
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[975] | 180 | from pykota.config import PyKotaConfigError |
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[973] | 181 | from pykota.storage import PyKotaStorageError |
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| 182 | from pykota.accounter import openAccounter, PyKotaAccounterError |
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[695] | 183 | |
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[703] | 184 | class PyKotaFilter(PyKotaTool) : |
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[695] | 185 | """Class for the PyKota filter.""" |
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[952] | 186 | def __init__(self) : |
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[915] | 187 | PyKotaTool.__init__(self) |
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[1000] | 188 | (self.printingsystem, self.printerhostname, self.printername, self.username, self.jobid, self.inputfile, self.copies) = self.extractInfoFromCupsOrLprng() |
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[973] | 189 | self.accounter = openAccounter(self) |
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[695] | 190 | |
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[973] | 191 | def extractInfoFromCupsOrLprng(self) : |
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| 192 | """Returns a tuple (printingsystem, printerhostname, printername, username, jobid, filename) depending on the printing system in use (as seen by the print filter). |
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| 193 | |
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[1080] | 194 | Returns (None, None, None, None, None, None, None) if no printing system is recognized. |
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[973] | 195 | """ |
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| 196 | # Try to detect CUPS |
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| 197 | if os.environ.has_key("CUPS_SERVERROOT") and os.path.isdir(os.environ.get("CUPS_SERVERROOT", "")) : |
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| 198 | if len(sys.argv) == 7 : |
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| 199 | inputfile = sys.argv[6] |
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| 200 | else : |
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| 201 | inputfile = None |
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| 202 | |
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| 203 | device_uri = os.environ.get("DEVICE_URI", "") |
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| 204 | # TODO : check this for more complex urls than ipp://myprinter.dot.com:631/printers/lp |
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| 205 | try : |
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| 206 | (backend, destination) = device_uri.split(":", 1) |
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| 207 | except ValueError : |
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| 208 | raise PyKotaToolError, "Invalid DEVICE_URI : %s\n" % device_uri |
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| 209 | while destination.startswith("/") : |
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| 210 | destination = destination[1:] |
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| 211 | printerhostname = destination.split("/")[0].split(":")[0] |
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[1000] | 212 | return ("CUPS", printerhostname, os.environ.get("PRINTER"), sys.argv[2].strip(), sys.argv[1].strip(), inputfile, int(sys.argv[4].strip())) |
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[973] | 213 | else : |
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| 214 | # Try to detect LPRng |
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[1026] | 215 | jseen = Pseen = nseen = rseen = Kseen = None |
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[973] | 216 | for arg in sys.argv : |
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| 217 | if arg.startswith("-j") : |
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| 218 | jseen = arg[2:].strip() |
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| 219 | elif arg.startswith("-n") : |
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| 220 | nseen = arg[2:].strip() |
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| 221 | elif arg.startswith("-P") : |
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| 222 | Pseen = arg[2:].strip() |
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| 223 | elif arg.startswith("-r") : |
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| 224 | rseen = arg[2:].strip() |
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[1000] | 225 | elif arg.startswith("-K") or arg.startswith("-#") : |
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| 226 | Kseen = int(arg[2:].strip()) |
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| 227 | if Kseen is None : |
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| 228 | Kseen = 1 # we assume the user wants at least one copy... |
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[1116] | 229 | if (rseen is None) and jseen and Pseen and nseen : |
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| 230 | self.logger.log_message(_("Printer hostname undefined, set to 'localhost'"), "warn") |
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| 231 | rseen = "localhost" |
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[973] | 232 | if jseen and Pseen and nseen and rseen : |
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[1026] | 233 | # job is always in stdin (None) |
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| 234 | return ("LPRNG", rseen, Pseen, nseen, jseen, None, Kseen) |
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[1116] | 235 | self.logger.log_message(_("Printing system unknown, args=%s") % " ".join(sys.argv), "warn") |
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[1000] | 236 | return (None, None, None, None, None, None, None) # Unknown printing system |
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[973] | 237 | |
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[952] | 238 | def acceptJob(self) : |
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| 239 | """Returns the exit code needed by the printing backend to accept the job and print it.""" |
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| 240 | if self.printingsystem == "CUPS" : |
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| 241 | return 0 |
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| 242 | elif self.printingsystem == "LPRNG" : |
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| 243 | return 0 |
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| 244 | else : |
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| 245 | # UNKNOWN |
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| 246 | return -1 |
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| 247 | |
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| 248 | def removeJob(self) : |
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| 249 | """Returns the exit code needed by the printing backend to refuse the job and remove it.""" |
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| 250 | if self.printingsystem == "CUPS" : |
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| 251 | return 1 |
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| 252 | elif self.printingsystem == "LPRNG" : |
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| 253 | return 3 |
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| 254 | else : |
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| 255 | # UNKNOWN |
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| 256 | return -1 |
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| 257 | |
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[1152] | 258 | def format_commandline(prt, usr, cmdline) : |
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| 259 | """Passes printer and user names on the command line.""" |
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| 260 | printer = prt.Name |
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| 261 | user = usr.Name |
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| 262 | # we don't want the external command's standard |
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| 263 | # output to break the print job's data, but we |
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| 264 | # want to keep its standard error |
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| 265 | return "%s >/dev/null" % (cmdline % locals()) |
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| 266 | |
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[1113] | 267 | def main(thefilter) : |
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[695] | 268 | """Do it, and do it right !""" |
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[952] | 269 | # |
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| 270 | # If this is a CUPS filter, we should act and die like a CUPS filter when needed |
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[1113] | 271 | if thefilter.printingsystem == "CUPS" : |
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[952] | 272 | if len(sys.argv) not in (6, 7) : |
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| 273 | sys.stderr.write("ERROR: %s job-id user title copies options [file]\n" % sys.argv[0]) |
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[1113] | 274 | return thefilter.removeJob() |
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[695] | 275 | |
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| 276 | # Get the last page counter and last username from the Quota Storage backend |
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[1113] | 277 | printer = thefilter.storage.getPrinter(thefilter.printername) |
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[1041] | 278 | if not printer.Exists : |
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[695] | 279 | # The printer is unknown from the Quota Storage perspective |
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| 280 | # we let the job pass through, but log a warning message |
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[1113] | 281 | thefilter.logger.log_message(_("Printer %s not registered in the PyKota system") % thefilter.printername, "warn") |
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[695] | 282 | else : |
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[1152] | 283 | for compteur in range(2) : |
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| 284 | user = thefilter.storage.getUser(thefilter.username) |
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| 285 | if user.Exists : |
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| 286 | break |
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[952] | 287 | else : |
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[1152] | 288 | # The user is unknown from the Quota Storage perspective |
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| 289 | # Depending on the default policy for this printer, we |
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| 290 | # either let the job pass through or reject it, but we |
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| 291 | # log a message in any case. |
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| 292 | (policy, args) = thefilter.config.getPrinterPolicy(thefilter.printername) |
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| 293 | if policy == "ALLOW" : |
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| 294 | action = "POLICY_ALLOW" |
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| 295 | elif policy == "EXTERNAL" : |
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| 296 | commandline = format_commandline(printer, user, args) |
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| 297 | thefilter.logger.log_message(_("User %s not registered in the PyKota system, applying external policy (%s) for printer %s") % (thefilter.username, commandline, thefilter.printername), "info") |
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| 298 | if os.system(commandline) : |
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| 299 | thefilter.logger.log_message(_("External policy %s for printer %s produced an error. Job rejected. Please check PyKota's configuration files.") % (commandline, thefilter.printername), "error") |
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| 300 | return thefilter.removeJob() |
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| 301 | else : |
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| 302 | # here we try a second time, because the goal |
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| 303 | # of the external action was to add the user |
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| 304 | # in the database. |
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| 305 | continue |
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| 306 | else : |
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| 307 | action = "POLICY_DENY" |
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| 308 | thefilter.logger.log_message(_("User %s not registered in the PyKota system, applying default policy (%s) for printer %s") % (thefilter.username, action, thefilter.printername), "warn") |
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| 309 | if action == "POLICY_DENY" : |
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| 310 | return thefilter.removeJob() |
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| 311 | # when we get there, the printer policy allows the job to pass |
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| 312 | break |
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| 313 | |
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| 314 | # if user exists, do accounting |
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| 315 | if user.Exists : |
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[973] | 316 | # Now does the accounting and act depending on the result |
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[1113] | 317 | action = thefilter.accounter.doAccounting(printer, user) |
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[1152] | 318 | |
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[900] | 319 | # if not allowed to print then die, else proceed. |
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| 320 | if action == "DENY" : |
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| 321 | # No, just die cleanly |
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[1113] | 322 | return thefilter.removeJob() |
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[1152] | 323 | elif policy == "EXTERNAL" : |
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| 324 | thefilter.logger.log_message(_("External policy %s for printer %s couldn't add user %s. Job rejected.") % (commandline, thefilter.printername, thefilter.username), "error") |
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| 325 | return thefilter.removeJob() |
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[695] | 326 | |
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| 327 | # pass the job untouched to the underlying layer |
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[1113] | 328 | thefilter.accounter.filterInput(thefilter.inputfile) |
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[695] | 329 | |
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[1113] | 330 | return thefilter.acceptJob() |
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[695] | 331 | |
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| 332 | if __name__ == "__main__" : |
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[1004] | 333 | retcode = -1 |
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[973] | 334 | try : |
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[1113] | 335 | # Initializes the current tool |
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| 336 | kotafilter = PyKotaFilter() |
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| 337 | retcode = main(kotafilter) |
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[1124] | 338 | except (PyKotaToolError, PyKotaConfigError, PyKotaStorageError, PyKotaAccounterError, AttributeError, KeyError, IndexError, ValueError, TypeError, IOError), msg : |
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[973] | 339 | sys.stderr.write("ERROR : PyKota filter failed (%s)\n" % msg) |
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| 340 | sys.stderr.flush() |
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[1113] | 341 | retcode = -1 |
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| 342 | |
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| 343 | try : |
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| 344 | kotafilter.storage.close() |
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| 345 | except (TypeError, NameError, AttributeError) : |
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| 346 | pass |
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| 347 | |
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[973] | 348 | sys.exit(retcode) |
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