1 | #! /usr/bin/env python |
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2 | # -*- coding: ISO-8859-15 -*- |
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3 | |
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4 | # PyKota accounting filter |
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5 | # |
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6 | # PyKota - Print Quotas for CUPS and LPRng |
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7 | # |
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8 | # (c) 2003 Jerome Alet <alet@librelogiciel.com> |
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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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13 | # |
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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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22 | # |
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23 | # $Id$ |
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24 | # |
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25 | # $Log$ |
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26 | # Revision 1.48 2003/12/27 16:49:25 uid67467 |
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27 | # Should be ok now. |
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28 | # |
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29 | # Revision 1.47 2003/11/26 19:17:35 jalet |
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30 | # Printing on a printer not present in the Quota Storage now results |
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31 | # in the job being stopped or cancelled depending on the system. |
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32 | # |
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33 | # Revision 1.46 2003/11/24 14:25:02 jalet |
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34 | # Missing import in pykota filter |
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35 | # |
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36 | # Revision 1.45 2003/11/19 23:19:37 jalet |
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37 | # Code refactoring work. |
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38 | # Explicit redirection to /dev/null has to be set in external policy now, just |
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39 | # like in external mailto. |
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40 | # |
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41 | # Revision 1.44 2003/11/08 16:05:31 jalet |
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42 | # CUPS backend added for people to experiment. |
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43 | # |
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44 | # Revision 1.43 2003/11/06 22:33:25 jalet |
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45 | # French variable name |
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46 | # |
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47 | # Revision 1.42 2003/10/08 21:41:38 jalet |
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48 | # External policies for printers works ! |
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49 | # We can now auto-add users on first print, and do other useful things if needed. |
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50 | # |
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51 | # Revision 1.41 2003/10/07 09:07:27 jalet |
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52 | # Character encoding added to please latest version of Python |
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53 | # |
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54 | # Revision 1.40 2003/09/04 08:38:56 jalet |
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55 | # Added an exception catch to ensure clean close of database even in |
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56 | # case of TypeError too. |
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57 | # |
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58 | # Revision 1.39 2003/08/18 16:35:28 jalet |
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59 | # New pychecker pass, on the tools this time. |
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60 | # |
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61 | # Revision 1.38 2003/08/18 16:20:59 jalet |
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62 | # Improvement of the printing system detection code. |
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63 | # |
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64 | # Revision 1.37 2003/07/29 20:55:17 jalet |
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65 | # 1.14 is out ! |
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66 | # |
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67 | # Revision 1.36 2003/07/10 06:09:52 jalet |
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68 | # Incorrect documentation string |
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69 | # |
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70 | # Revision 1.35 2003/06/25 14:10:01 jalet |
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71 | # Hey, it may work (edpykota --reset excepted) ! |
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72 | # |
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73 | # Revision 1.34 2003/06/13 18:54:17 jalet |
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74 | # Bug with remote jobs and LPRng fixed. |
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75 | # |
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76 | # Revision 1.33 2003/05/28 13:51:38 jalet |
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77 | # Better handling of errors |
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78 | # |
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79 | # Revision 1.32 2003/05/27 23:00:20 jalet |
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80 | # Big rewrite of external accounting methods. |
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81 | # Should work well now. |
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82 | # |
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83 | # Revision 1.31 2003/04/30 13:36:39 jalet |
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84 | # Stupid accounting method was added. |
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85 | # |
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86 | # Revision 1.30 2003/04/29 22:03:38 jalet |
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87 | # Better error handling. |
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88 | # |
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89 | # Revision 1.29 2003/04/29 18:37:54 jalet |
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90 | # Pluggable accounting methods (actually doesn't support external scripts) |
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91 | # |
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92 | # Revision 1.28 2003/04/26 08:41:24 jalet |
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93 | # Small code reorganisation (UNTESTED) to allow pluggable accounting |
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94 | # methods in the future. |
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95 | # |
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96 | # Revision 1.27 2003/04/25 09:23:47 jalet |
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97 | # Debug message passed through ! |
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98 | # |
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99 | # Revision 1.26 2003/04/25 08:23:23 jalet |
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100 | # Multiple tries to get the printer's internal page counter, waits for |
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101 | # one minute maximum for the printer to warm up, actually. |
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102 | # |
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103 | # Revision 1.25 2003/04/24 11:53:48 jalet |
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104 | # Default policy for unknown users/groups is to DENY printing instead |
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105 | # of the previous default to ALLOW printing. This is to solve an accuracy |
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106 | # problem. If you set the policy to ALLOW, jobs printed by in nexistant user |
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107 | # (from PyKota's POV) will be charged to the next user who prints on the |
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108 | # same printer. |
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109 | # |
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110 | # Revision 1.24 2003/04/23 22:13:56 jalet |
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111 | # Preliminary support for LPRng added BUT STILL UNTESTED. |
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112 | # |
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113 | # Revision 1.23 2003/04/15 11:30:57 jalet |
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114 | # More work done on money print charging. |
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115 | # Minor bugs corrected. |
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116 | # All tools now access to the storage as priviledged users, repykota excepted. |
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117 | # |
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118 | # Revision 1.22 2003/04/15 11:09:04 jalet |
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119 | # Small bug was fixed when a printer was never used and its internal |
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120 | # page counter is not accessible. |
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121 | # |
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122 | # Revision 1.21 2003/04/12 17:20:14 jalet |
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123 | # Better formula for HP workaround |
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124 | # |
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125 | # Revision 1.20 2003/04/12 16:58:28 jalet |
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126 | # The workaround for HP printers was not correct, and there's probably no |
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127 | # correct way to workaround the problem because we can't save the internal |
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128 | # page counter in real time. The last job's size is unconditionnally set to |
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129 | # 5 pages in this case. |
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130 | # |
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131 | # Revision 1.19 2003/04/11 08:56:49 jalet |
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132 | # Comment |
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133 | # |
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134 | # Revision 1.18 2003/04/11 08:50:39 jalet |
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135 | # Workaround for the HP "feature" of saving the page counter to NVRAM |
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136 | # only every time 10 new pages are printed... |
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137 | # Workaround for printers with volatile page counters. |
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138 | # |
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139 | # Revision 1.17 2003/04/10 21:47:20 jalet |
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140 | # Job history added. Upgrade script neutralized for now ! |
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141 | # |
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142 | # Revision 1.16 2003/04/08 20:38:08 jalet |
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143 | # The last job Id is saved now for each printer, this will probably |
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144 | # allow other accounting methods in the future. |
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145 | # |
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146 | # Revision 1.15 2003/03/29 13:45:27 jalet |
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147 | # GPL paragraphs were incorrectly (from memory) copied into the sources. |
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148 | # Two README files were added. |
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149 | # Upgrade script for PostgreSQL pre 1.01 schema was added. |
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150 | # |
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151 | # Revision 1.14 2003/03/07 22:16:57 jalet |
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152 | # Algorithmically incorrect : last user quota wasn't updated if current |
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153 | # user wasn't allowed to print. |
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154 | # |
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155 | # Revision 1.13 2003/02/27 23:59:28 jalet |
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156 | # Stupid bug wrt exception handlingand value conversion |
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157 | # |
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158 | # Revision 1.12 2003/02/27 23:48:41 jalet |
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159 | # Correctly maps PyKota's log levels to syslog log levels |
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160 | # |
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161 | # Revision 1.11 2003/02/27 22:55:20 jalet |
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162 | # WARN log priority doesn't exist. |
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163 | # |
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164 | # Revision 1.10 2003/02/27 22:43:21 jalet |
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165 | # Missing import |
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166 | # |
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167 | # Revision 1.9 2003/02/27 22:40:26 jalet |
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168 | # Correctly handles cases where the printer is off. |
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169 | # |
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170 | # Revision 1.8 2003/02/09 12:56:53 jalet |
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171 | # Internationalization begins... |
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172 | # |
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173 | # Revision 1.7 2003/02/07 10:23:48 jalet |
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174 | # Avoid a possible future name clash |
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175 | # |
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176 | # Revision 1.6 2003/02/06 22:54:33 jalet |
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177 | # warnpykota should be ok |
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178 | # |
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179 | # Revision 1.5 2003/02/05 22:45:25 jalet |
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180 | # Forgotten import |
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181 | # |
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182 | # Revision 1.4 2003/02/05 22:42:51 jalet |
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183 | # Typo |
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184 | # |
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185 | # Revision 1.3 2003/02/05 22:38:39 jalet |
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186 | # Typo |
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187 | # |
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188 | # Revision 1.2 2003/02/05 22:16:20 jalet |
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189 | # DEVICE_URI is undefined outside of CUPS, i.e. for normal command line tools |
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190 | # |
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191 | # Revision 1.1 2003/02/05 21:28:17 jalet |
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192 | # Initial import into CVS |
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193 | # |
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194 | # |
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195 | # |
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196 | |
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197 | import sys |
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198 | import os |
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199 | |
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200 | from pykota.tool import PyKotaFilterOrBackend, PyKotaToolError |
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201 | from pykota.config import PyKotaConfigError |
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202 | from pykota.storage import PyKotaStorageError |
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203 | from pykota.accounter import PyKotaAccounterError |
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204 | from pykota.requester import PyKotaRequesterError |
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205 | |
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206 | class PyKotaFilter(PyKotaFilterOrBackend) : |
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207 | """A class for the pykota filter.""" |
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208 | def acceptJob(self) : |
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209 | """Returns the exit code needed by the printing backend to accept the job and print it.""" |
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210 | if self.printingsystem == "CUPS" : |
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211 | return 0 |
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212 | elif self.printingsystem == "LPRNG" : |
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213 | return 0 |
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214 | else : |
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215 | # UNKNOWN |
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216 | return -1 |
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217 | |
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218 | def removeJob(self) : |
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219 | """Returns the exit code needed by the printing backend to refuse the job and remove it.""" |
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220 | if self.printingsystem == "CUPS" : |
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221 | return 1 |
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222 | elif self.printingsystem == "LPRNG" : |
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223 | return 3 |
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224 | else : |
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225 | # UNKNOWN |
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226 | return -1 |
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227 | |
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228 | def main(thefilter) : |
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229 | """Do it, and do it right !""" |
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230 | # |
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231 | # If this is a CUPS filter, we should act and die like a CUPS filter when needed |
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232 | if thefilter.printingsystem == "CUPS" : |
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233 | if len(sys.argv) not in (6, 7) : |
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234 | sys.stderr.write("ERROR: %s job-id user title copies options [file]\n" % sys.argv[0]) |
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235 | return thefilter.removeJob() |
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236 | |
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237 | # Get the last page counter and last username from the Quota Storage backend |
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238 | printer = thefilter.storage.getPrinter(thefilter.printername) |
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239 | if not printer.Exists : |
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240 | # The printer is unknown from the Quota Storage perspective. |
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241 | # we just cancel the job. |
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242 | thefilter.logger.log_message(_("Printer %s not registered in the PyKota system") % thefilter.printername, "error") |
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243 | return thefilter.removeJob() |
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244 | else : |
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245 | for dummy in range(2) : |
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246 | user = thefilter.storage.getUser(thefilter.username) |
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247 | if user.Exists : |
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248 | break |
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249 | else : |
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250 | # The user is unknown from the Quota Storage perspective |
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251 | # Depending on the default policy for this printer, we |
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252 | # either let the job pass through or reject it, but we |
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253 | # log a message in any case. |
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254 | (policy, args) = thefilter.config.getPrinterPolicy(thefilter.printername) |
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255 | if policy == "ALLOW" : |
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256 | action = "POLICY_ALLOW" |
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257 | elif policy == "EXTERNAL" : |
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258 | commandline = thefilter.formatCommandLine(args, user, printer) |
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259 | 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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260 | if os.system(commandline) : |
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261 | 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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262 | return thefilter.removeJob() |
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263 | else : |
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264 | # here we try a second time, because the goal |
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265 | # of the external action was to add the user |
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266 | # in the database. |
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267 | continue |
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268 | else : |
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269 | action = "POLICY_DENY" |
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270 | 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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271 | if action == "POLICY_DENY" : |
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272 | return thefilter.removeJob() |
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273 | # when we get there, the printer policy allows the job to pass |
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274 | break |
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275 | |
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276 | # if user exists, do accounting |
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277 | if user.Exists : |
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278 | # Now does the accounting and act depending on the result |
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279 | thefilter.logdebug("Does accounting for user %s on printer %s." % (user.Name, printer.Name)) |
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280 | action = thefilter.accounter.doAccounting(printer, user) |
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281 | |
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282 | # if not allowed to print then die, else proceed. |
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283 | if action == "DENY" : |
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284 | # No, just die cleanly |
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285 | thefilter.logdebug("Printing is denied.") |
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286 | return thefilter.removeJob() |
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287 | elif policy == "EXTERNAL" : |
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288 | 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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289 | return thefilter.removeJob() |
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290 | |
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291 | # pass the job untouched to the underlying layer |
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292 | thefilter.logdebug("Passing input data to next filter.") |
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293 | thefilter.accounter.filterInput(thefilter.inputfile) |
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294 | |
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295 | return thefilter.acceptJob() |
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296 | |
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297 | if __name__ == "__main__" : |
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298 | retcode = -1 |
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299 | try : |
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300 | # Initializes the current tool |
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301 | kotafilter = PyKotaFilter() |
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302 | retcode = main(kotafilter) |
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303 | except (PyKotaToolError, PyKotaConfigError, PyKotaStorageError, PyKotaAccounterError, PyKotaRequesterError, AttributeError, KeyError, IndexError, ValueError, TypeError, IOError), msg : |
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304 | sys.stderr.write("ERROR : PyKota filter failed (%s)\n" % msg) |
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305 | sys.stderr.flush() |
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306 | try : |
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307 | retcode = kotafilter.removeJob() |
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308 | except : |
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309 | retcode = -1 |
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310 | |
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311 | try : |
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312 | kotafilter.storage.close() |
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313 | except (TypeError, NameError, AttributeError) : |
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314 | pass |
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315 | |
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316 | sys.exit(retcode) |
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