1 | # PyKota |
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2 | # -*- coding: ISO-8859-15 -*- |
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3 | # |
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4 | # PyKota - Print Quotas for CUPS and LPRng |
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5 | # |
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6 | # (c) 2003-2004 Jerome Alet <alet@librelogiciel.com> |
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7 | # This program is free software; you can redistribute it and/or modify |
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8 | # it under the terms of the GNU General Public License as published by |
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9 | # the Free Software Foundation; either version 2 of the License, or |
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10 | # (at your option) any later version. |
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11 | # |
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12 | # This program is distributed in the hope that it will be useful, |
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13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | # GNU General Public License for more details. |
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16 | # |
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17 | # You should have received a copy of the GNU General Public License |
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18 | # along with this program; if not, write to the Free Software |
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19 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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20 | # |
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21 | # $Id$ |
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22 | # |
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23 | # $Log$ |
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24 | # Revision 1.10 2004/01/08 14:10:33 jalet |
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25 | # Copyright year changed. |
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26 | # |
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27 | # Revision 1.9 2003/10/07 09:07:29 jalet |
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28 | # Character encoding added to please latest version of Python |
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29 | # |
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30 | # Revision 1.8 2003/07/07 11:49:24 jalet |
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31 | # Lots of small fixes with the help of PyChecker |
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32 | # |
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33 | # Revision 1.7 2003/04/23 22:13:57 jalet |
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34 | # Preliminary support for LPRng added BUT STILL UNTESTED. |
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35 | # |
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36 | # Revision 1.6 2003/03/29 13:45:27 jalet |
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37 | # GPL paragraphs were incorrectly (from memory) copied into the sources. |
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38 | # Two README files were added. |
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39 | # Upgrade script for PostgreSQL pre 1.01 schema was added. |
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40 | # |
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41 | # Revision 1.5 2003/02/10 11:47:39 jalet |
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42 | # Moved some code down into the requesters |
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43 | # |
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44 | # Revision 1.4 2003/02/10 10:36:33 jalet |
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45 | # Small problem wrt external requester |
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46 | # |
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47 | # Revision 1.3 2003/02/10 00:42:17 jalet |
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48 | # External requester should be ok (untested) |
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49 | # New syntax for configuration file wrt requesters |
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50 | # |
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51 | # Revision 1.2 2003/02/09 13:05:43 jalet |
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52 | # Internationalization continues... |
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53 | # |
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54 | # Revision 1.1 2003/02/07 13:15:01 jalet |
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55 | # External requester skeleton added. |
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56 | # |
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57 | # |
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58 | # |
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59 | |
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60 | import os |
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61 | from pykota.requester import PyKotaRequesterError |
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62 | |
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63 | class Requester : |
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64 | """A class to send queries to printers via external commands.""" |
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65 | def __init__(self, printername, arguments) : |
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66 | """Sets instance vars depending on the current printer.""" |
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67 | self.printername = printername |
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68 | self.commandline = arguments.strip() |
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69 | |
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70 | def getPrinterPageCounter(self, printer) : |
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71 | """Returns the page counter from the printer via an external command. |
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72 | |
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73 | The external command must report the life time page number of the printer on stdout. |
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74 | """ |
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75 | commandline = self.commandline % locals() |
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76 | if printer is None : |
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77 | raise PyKotaRequesterError, _("Unknown printer address in EXTERNAL(%s) for printer %s") % (commandline, self.printername) |
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78 | answer = os.popen(commandline) |
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79 | try : |
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80 | pagecounter = int(answer.readline().strip()) |
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81 | except ValueError : |
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82 | raise PyKotaRequesterError, _("Unable to query printer %s via EXTERNAL(%s)") % (printer, commandline) |
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83 | answer.close() |
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84 | return pagecounter |
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85 | |
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