1 | #! /usr/bin/env python |
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2 | |
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3 | # PyKota accounting filter |
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4 | # |
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5 | # PyKota - Print Quotas for CUPS and LPRng |
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6 | # |
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7 | # (c) 2003 Jerome Alet <alet@librelogiciel.com> |
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8 | # This program is free software; you can redistribute it and/or modify |
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9 | # it under the terms of the GNU General Public License as published by |
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10 | # the Free Software Foundation; either version 2 of the License, or |
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11 | # (at your option) any later version. |
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12 | # |
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13 | # This program is distributed in the hope that it will be useful, |
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14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | # GNU General Public License for more details. |
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17 | # |
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18 | # You should have received a copy of the GNU General Public License |
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19 | # along with this program; if not, write to the Free Software |
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20 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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21 | # |
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22 | # $Id$ |
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23 | # |
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24 | # $Log$ |
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25 | # Revision 1.33 2003/05/28 13:51:38 jalet |
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26 | # Better handling of errors |
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27 | # |
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28 | # Revision 1.32 2003/05/27 23:00:20 jalet |
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29 | # Big rewrite of external accounting methods. |
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30 | # Should work well now. |
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31 | # |
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32 | # Revision 1.31 2003/04/30 13:36:39 jalet |
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33 | # Stupid accounting method was added. |
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34 | # |
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35 | # Revision 1.30 2003/04/29 22:03:38 jalet |
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36 | # Better error handling. |
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37 | # |
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38 | # Revision 1.29 2003/04/29 18:37:54 jalet |
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39 | # Pluggable accounting methods (actually doesn't support external scripts) |
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40 | # |
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41 | # Revision 1.28 2003/04/26 08:41:24 jalet |
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42 | # Small code reorganisation (UNTESTED) to allow pluggable accounting |
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43 | # methods in the future. |
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44 | # |
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45 | # Revision 1.27 2003/04/25 09:23:47 jalet |
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46 | # Debug message passed through ! |
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47 | # |
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48 | # Revision 1.26 2003/04/25 08:23:23 jalet |
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49 | # Multiple tries to get the printer's internal page counter, waits for |
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50 | # one minute maximum for the printer to warm up, actually. |
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51 | # |
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52 | # Revision 1.25 2003/04/24 11:53:48 jalet |
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53 | # Default policy for unknown users/groups is to DENY printing instead |
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54 | # of the previous default to ALLOW printing. This is to solve an accuracy |
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55 | # problem. If you set the policy to ALLOW, jobs printed by in nexistant user |
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56 | # (from PyKota's POV) will be charged to the next user who prints on the |
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57 | # same printer. |
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58 | # |
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59 | # Revision 1.24 2003/04/23 22:13:56 jalet |
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60 | # Preliminary support for LPRng added BUT STILL UNTESTED. |
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61 | # |
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62 | # Revision 1.23 2003/04/15 11:30:57 jalet |
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63 | # More work done on money print charging. |
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64 | # Minor bugs corrected. |
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65 | # All tools now access to the storage as priviledged users, repykota excepted. |
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66 | # |
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67 | # Revision 1.22 2003/04/15 11:09:04 jalet |
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68 | # Small bug was fixed when a printer was never used and its internal |
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69 | # page counter is not accessible. |
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70 | # |
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71 | # Revision 1.21 2003/04/12 17:20:14 jalet |
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72 | # Better formula for HP workaround |
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73 | # |
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74 | # Revision 1.20 2003/04/12 16:58:28 jalet |
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75 | # The workaround for HP printers was not correct, and there's probably no |
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76 | # correct way to workaround the problem because we can't save the internal |
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77 | # page counter in real time. The last job's size is unconditionnally set to |
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78 | # 5 pages in this case. |
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79 | # |
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80 | # Revision 1.19 2003/04/11 08:56:49 jalet |
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81 | # Comment |
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82 | # |
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83 | # Revision 1.18 2003/04/11 08:50:39 jalet |
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84 | # Workaround for the HP "feature" of saving the page counter to NVRAM |
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85 | # only every time 10 new pages are printed... |
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86 | # Workaround for printers with volatile page counters. |
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87 | # |
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88 | # Revision 1.17 2003/04/10 21:47:20 jalet |
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89 | # Job history added. Upgrade script neutralized for now ! |
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90 | # |
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91 | # Revision 1.16 2003/04/08 20:38:08 jalet |
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92 | # The last job Id is saved now for each printer, this will probably |
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93 | # allow other accounting methods in the future. |
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94 | # |
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95 | # Revision 1.15 2003/03/29 13:45:27 jalet |
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96 | # GPL paragraphs were incorrectly (from memory) copied into the sources. |
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97 | # Two README files were added. |
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98 | # Upgrade script for PostgreSQL pre 1.01 schema was added. |
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99 | # |
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100 | # Revision 1.14 2003/03/07 22:16:57 jalet |
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101 | # Algorithmically incorrect : last user quota wasn't updated if current |
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102 | # user wasn't allowed to print. |
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103 | # |
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104 | # Revision 1.13 2003/02/27 23:59:28 jalet |
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105 | # Stupid bug wrt exception handlingand value conversion |
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106 | # |
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107 | # Revision 1.12 2003/02/27 23:48:41 jalet |
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108 | # Correctly maps PyKota's log levels to syslog log levels |
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109 | # |
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110 | # Revision 1.11 2003/02/27 22:55:20 jalet |
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111 | # WARN log priority doesn't exist. |
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112 | # |
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113 | # Revision 1.10 2003/02/27 22:43:21 jalet |
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114 | # Missing import |
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115 | # |
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116 | # Revision 1.9 2003/02/27 22:40:26 jalet |
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117 | # Correctly handles cases where the printer is off. |
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118 | # |
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119 | # Revision 1.8 2003/02/09 12:56:53 jalet |
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120 | # Internationalization begins... |
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121 | # |
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122 | # Revision 1.7 2003/02/07 10:23:48 jalet |
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123 | # Avoid a possible future name clash |
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124 | # |
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125 | # Revision 1.6 2003/02/06 22:54:33 jalet |
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126 | # warnpykota should be ok |
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127 | # |
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128 | # Revision 1.5 2003/02/05 22:45:25 jalet |
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129 | # Forgotten import |
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130 | # |
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131 | # Revision 1.4 2003/02/05 22:42:51 jalet |
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132 | # Typo |
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133 | # |
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134 | # Revision 1.3 2003/02/05 22:38:39 jalet |
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135 | # Typo |
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136 | # |
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137 | # Revision 1.2 2003/02/05 22:16:20 jalet |
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138 | # DEVICE_URI is undefined outside of CUPS, i.e. for normal command line tools |
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139 | # |
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140 | # Revision 1.1 2003/02/05 21:28:17 jalet |
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141 | # Initial import into CVS |
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142 | # |
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143 | # |
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144 | # |
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145 | |
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146 | import sys |
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147 | import os |
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148 | import time |
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149 | |
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150 | from pykota.tool import PyKotaTool, PyKotaToolError |
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151 | from pykota.config import PyKotaConfigError |
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152 | from pykota.storage import PyKotaStorageError |
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153 | from pykota.accounter import openAccounter, PyKotaAccounterError |
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154 | |
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155 | class PyKotaFilter(PyKotaTool) : |
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156 | """Class for the PyKota filter.""" |
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157 | def __init__(self) : |
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158 | PyKotaTool.__init__(self) |
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159 | (self.printingsystem, self.printerhostname, self.printername, self.username, self.jobid, self.inputfile, self.copies) = self.extractInfoFromCupsOrLprng() |
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160 | self.accounter = openAccounter(self) |
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161 | |
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162 | def extractInfoFromCupsOrLprng(self) : |
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163 | """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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164 | |
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165 | Returns (None, None, None, None, None, None) if no printing system is recognized. |
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166 | """ |
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167 | # Try to detect CUPS |
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168 | if os.environ.has_key("CUPS_SERVERROOT") and os.path.isdir(os.environ.get("CUPS_SERVERROOT", "")) : |
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169 | if len(sys.argv) == 7 : |
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170 | inputfile = sys.argv[6] |
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171 | else : |
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172 | inputfile = None |
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173 | |
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174 | device_uri = os.environ.get("DEVICE_URI", "") |
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175 | # TODO : check this for more complex urls than ipp://myprinter.dot.com:631/printers/lp |
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176 | try : |
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177 | (backend, destination) = device_uri.split(":", 1) |
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178 | except ValueError : |
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179 | raise PyKotaToolError, "Invalid DEVICE_URI : %s\n" % device_uri |
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180 | while destination.startswith("/") : |
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181 | destination = destination[1:] |
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182 | printerhostname = destination.split("/")[0].split(":")[0] |
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183 | 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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184 | else : |
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185 | # Try to detect LPRng |
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186 | jseen = Jseen = Pseen = nseen = rseen = Kseen = None |
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187 | for arg in sys.argv : |
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188 | if arg.startswith("-j") : |
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189 | jseen = arg[2:].strip() |
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190 | elif arg.startswith("-J") : |
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191 | Jseen = arg[2:].strip() |
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192 | if Jseen == "(STDIN)" : |
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193 | Jseen = None |
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194 | elif arg.startswith("-n") : |
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195 | nseen = arg[2:].strip() |
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196 | elif arg.startswith("-P") : |
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197 | Pseen = arg[2:].strip() |
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198 | elif arg.startswith("-r") : |
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199 | rseen = arg[2:].strip() |
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200 | elif arg.startswith("-K") or arg.startswith("-#") : |
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201 | Kseen = int(arg[2:].strip()) |
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202 | if Kseen is None : |
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203 | Kseen = 1 # we assume the user wants at least one copy... |
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204 | if jseen and Pseen and nseen and rseen : |
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205 | return ("LPRNG", rseen, Pseen, nseen, jseen, Jseen, Kseen) |
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206 | return (None, None, None, None, None, None, None) # Unknown printing system |
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207 | |
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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() : |
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229 | """Do it, and do it right !""" |
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230 | # Initializes the current tool |
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231 | kotafilter = PyKotaFilter() |
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232 | |
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233 | # |
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234 | # If this is a CUPS filter, we should act and die like a CUPS filter when needed |
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235 | if kotafilter.printingsystem == "CUPS" : |
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236 | if len(sys.argv) not in (6, 7) : |
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237 | sys.stderr.write("ERROR: %s job-id user title copies options [file]\n" % sys.argv[0]) |
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238 | return kotafilter.removeJob() |
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239 | |
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240 | # Get the last page counter and last username from the Quota Storage backend |
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241 | printerid = kotafilter.storage.getPrinterId(kotafilter.printername) |
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242 | if printerid is None : |
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243 | # The printer is unknown from the Quota Storage perspective |
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244 | # we let the job pass through, but log a warning message |
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245 | kotafilter.logger.log_message(_("Printer %s not registered in the PyKota system") % kotafilter.printername, "warn") |
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246 | else : |
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247 | userid = kotafilter.storage.getUserId(kotafilter.username) |
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248 | if userid is None : |
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249 | # The user is unknown from the Quota Storage perspective |
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250 | # Depending on the default policy for this printer, we |
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251 | # either let the job pass through or reject it, but we |
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252 | # log a message in any case. |
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253 | policy = kotafilter.config.getPrinterPolicy(kotafilter.printername) |
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254 | if policy == "ALLOW" : |
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255 | action = "POLICY_ALLOW" |
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256 | else : |
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257 | action = "POLICY_DENY" |
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258 | kotafilter.logger.log_message(_("User %s not registered in the PyKota system, applying default policy (%s) for printer %s") % (kotafilter.username, action, kotafilter.printername), "warn") |
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259 | if action == "POLICY_DENY" : |
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260 | return kotafilter.removeJob() |
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261 | else : |
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262 | # Now does the accounting and act depending on the result |
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263 | action = kotafilter.accounter.doAccounting(printerid, userid) |
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264 | |
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265 | # if not allowed to print then die, else proceed. |
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266 | if action == "DENY" : |
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267 | # No, just die cleanly |
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268 | return kotafilter.removeJob() |
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269 | |
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270 | # pass the job untouched to the underlying layer |
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271 | kotafilter.accounter.filterInput(kotafilter.inputfile) |
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272 | |
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273 | return kotafilter.acceptJob() |
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274 | |
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275 | if __name__ == "__main__" : |
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276 | retcode = -1 |
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277 | try : |
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278 | retcode = main() |
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279 | except (PyKotaToolError, PyKotaConfigError, PyKotaStorageError, PyKotaAccounterError, AttributeError, KeyError, IndexError, ValueError, IOError), msg : |
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280 | sys.stderr.write("ERROR : PyKota filter failed (%s)\n" % msg) |
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281 | sys.stderr.flush() |
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282 | sys.exit(retcode) |
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283 | |
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