[695] | 1 | # $Id$ |
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| 2 | |
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| 3 | PyKota - Print Quota for CUPS |
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| 4 | |
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| 5 | (c) 2003 Jerome Alet <alet@librelogiciel.com> |
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[873] | 6 | This program is free software; you can redistribute it and/or modify |
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| 7 | it under the terms of the GNU General Public License as published by |
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| 8 | the Free Software Foundation; either version 2 of the License, or |
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| 9 | (at your option) any later version. |
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[695] | 10 | |
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[873] | 11 | This program is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | GNU General Public License for more details. |
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[695] | 15 | |
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[873] | 16 | You should have received a copy of the GNU General Public License |
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| 17 | along with this program; if not, write to the Free Software |
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| 18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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| 19 | |
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[761] | 20 | ==================================================================== |
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[695] | 21 | |
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[761] | 22 | READ SPECIAL LICENSING AND REDISTRBUTION TERMS IN THE FILE 'LICENSE' |
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| 23 | |
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| 24 | ==================================================================== |
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| 25 | |
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[695] | 26 | PyKota is a complete Print Quota system for the Common Unix Printing |
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| 27 | System (aka CUPS), which works by directly querying the printers |
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| 28 | for the number of pages they have printed. |
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| 29 | |
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[739] | 30 | Actual working features : |
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| 31 | |
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| 32 | - Per printer user quotas. |
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| 33 | |
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| 34 | - Automated email warning of users above quota to the |
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| 35 | user himself and to the print quota administrator. |
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| 36 | |
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| 37 | - CUPS filter for quota accounting : pykota |
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| 38 | |
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| 39 | - Command line print quota editor : edpykota |
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| 40 | |
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| 41 | - Command line print quota report generator : repykota |
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| 42 | |
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| 43 | - Command line print quota automated warning sender : warnpykota |
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| 44 | |
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[760] | 45 | - Command line tools mimic the disk quota utilities for |
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| 46 | easier mastering. |
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| 47 | |
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[739] | 48 | - Centralized storage of quotas : you can manage quotas for |
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| 49 | different printers on different print servers and store them all |
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| 50 | on the same quota storage server. |
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| 51 | WARNING : actually all your printers must have an unique name, |
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| 52 | but this may change in a future version. |
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| 53 | |
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[794] | 54 | - SNMP querying of any networked SNMP-enabled printer. |
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[739] | 55 | |
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[794] | 56 | - External command querying of any printer : you can use |
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| 57 | you own querying command, e.g. to query a printer via |
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| 58 | the serial port, sending it a special PJL job and |
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[840] | 59 | reading the result. See the example scripts in the |
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| 60 | "untested" directory and try to adapt them to your |
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| 61 | configuration. |
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[794] | 62 | |
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[739] | 63 | - Special scripts included for a seamless integration of |
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| 64 | PyKota on Debian machines. |
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| 65 | |
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| 66 | All the command line tools accept the -h | --help command line option |
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| 67 | which prints all the available options and show usage examples. |
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| 68 | |
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| 69 | Planned features are described in the TODO file. |
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| 70 | |
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[724] | 71 | Actually only the lazy quota method is implemented. What do I call |
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| 72 | lazy method ? |
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[695] | 73 | |
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[739] | 74 | The lazy method consists in querying the printer (actually via SNMP) |
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| 75 | for its total pages counter, just before the beginning of a job, and |
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[724] | 76 | use this to modify the *preceding* user's quota. So you're |
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| 77 | always late of one print job, but this is generally ok, especially |
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| 78 | because a check is also done to see if the current user is allowed |
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| 79 | or not to print. |
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| 80 | |
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[851] | 81 | Problem may theorically arise in batches of successive print jobs by |
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| 82 | different users when there's no sleep time between two jobs : the |
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| 83 | used pages may theorically be attributed to an incorrect user in the |
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| 84 | case that the printer is asked for its page counter at the beginning |
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| 85 | of a new job and before the end of the previous job. This depends on |
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| 86 | the printer speed and time between jobs, but so far I've not seen |
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| 87 | any problem with moderately used printers. This also depends on CUPS |
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| 88 | internal behavior : if CUPS doesn't begin to send a job to a printer |
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| 89 | before the previous one is completely printed, then there's no |
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| 90 | problem. |
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[724] | 91 | |
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[851] | 92 | Other querying methods which won't suffer from this possible |
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| 93 | problem, but probably from other ones ;-) will be implemented in the |
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| 94 | future. |
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[724] | 95 | |
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[726] | 96 | PyKota is known to work fine with HP Laserjet 2100 and 2200 |
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[739] | 97 | networked printers, and should work with any SNMP-enabled |
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| 98 | network printer capable of outputing its lifetime printed pages |
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| 99 | number. |
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[724] | 100 | |
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[859] | 101 | If your printers don't support SNMP, then making them work with |
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| 102 | PyKota is up to you. Some sample scripts which can query non-SNMP |
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| 103 | printers for their lifetime page counter are included in the |
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| 104 | ./untested directory. You'll have to test and adapt them though, and |
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| 105 | define them as external requesters in the PyKota configuration file. |
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| 106 | |
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[695] | 107 | ============================================================ |
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| 108 | |
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| 109 | INSTALLATION: |
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| 110 | ============= |
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| 111 | |
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[887] | 112 | WARNING : |
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| 113 | ========= |
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| 114 | |
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| 115 | If you run a PyKota version lower than 1.01, you definitely have to |
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| 116 | upgrade you Quota Storage Database. Please read the documentation |
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| 117 | included in the initscripts subdirectory first ! |
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| 118 | |
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[714] | 119 | Prerequisite : |
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| 120 | -------------- |
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| 121 | |
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| 122 | You need to have the following tools installed on the CUPS Server : |
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| 123 | |
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| 124 | - CUPS |
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[809] | 125 | - Python v2.1 or above |
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[714] | 126 | - eGenix' mxDateTime Python extension |
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| 127 | - PostgreSQL's PygreSQL Python extension and the PostgreSQL client |
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| 128 | libraries. |
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| 129 | - SNMP tools (specifically the snmpget command) |
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| 130 | |
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| 131 | You need to have the following tools installed on the Quota Storage |
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| 132 | Server : |
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| 133 | |
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| 134 | - PostgreSQL |
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| 135 | |
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| 136 | PygreSQL and the PostgreSQL client libraries's versions on the CUPS |
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| 137 | Server must match the PostgreSQL version used on the Quota Storage |
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| 138 | Server. |
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| 139 | |
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| 140 | This list of prerequisite software may change in the future, when |
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| 141 | PyKota will support more functionnalities you will be given |
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| 142 | alternatives. |
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| 143 | |
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[851] | 144 | Of course the CUPS Server and the Quota Storage Server can be the |
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| 145 | very same machine if you've got a tiny network, or you can have |
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| 146 | multiple CUPS Servers all storing their quotas on the same Quota |
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| 147 | Storage Server if you've got a bigger network. |
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| 148 | |
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[714] | 149 | Then : |
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| 150 | ------ |
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| 151 | |
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[724] | 152 | Download the latest PyKota version from the CVS tree on : |
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[695] | 153 | |
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[725] | 154 | http://savannah.nongnu.org/projects/pykota |
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[695] | 155 | |
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[714] | 156 | Just type : |
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[695] | 157 | |
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[725] | 158 | python setup.py install |
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[695] | 159 | |
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| 160 | You may need to be logged in with sufficient privileges (e.g. root) |
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| 161 | |
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[878] | 162 | The installation script will now automatically check if some software |
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| 163 | is missing and ask you if you still want to proceed with the |
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| 164 | installation or abort it completely. |
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| 165 | |
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[695] | 166 | Go to the initscripts subdirectory of PyKota's sources, and choose |
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| 167 | the appropriate storage backend for your configuration. Read |
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| 168 | the associated README file and execute the initialization script |
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[878] | 169 | to create an empty PyKota Storage. Upgrade scripts may be |
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| 170 | provided as well. |
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[695] | 171 | |
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| 172 | Copy the conf/pykota.conf.sample sample configuration file to |
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[878] | 173 | /etc/pykota.conf, and adapt this file to your own needs and |
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[714] | 174 | configuration. |
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[695] | 175 | |
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| 176 | Modify the PPD files for each printer on which you want to manage |
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| 177 | print quotas, for example /etc/cups/ppd/lp.ppd : |
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| 178 | |
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| 179 | --- Add the line below exactly as-is somewhere near the top --- |
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[702] | 180 | *cupsFilter: "application/vnd.cups-postscript 0 /usr/bin/pykota" |
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[695] | 181 | --- Add the line above exactly as-is somewhere near the top --- |
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| 182 | |
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[724] | 183 | Modify the path to the pykota executable if needed, unfortunately |
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| 184 | you have to supply the correct absolute path here due to CUPS |
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| 185 | internals, or put the pykota executable into /usr/lib/cups/filter |
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| 186 | instead of into /usr/bin. |
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[702] | 187 | |
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[724] | 188 | Do this for each ppd file present in this directory if you want |
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[695] | 189 | to enable quota on every printer. |
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| 190 | |
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[851] | 191 | WARNING : In the case you've got a non-postscript printer, chances |
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| 192 | are that the *cupsFilter is already filled-in and points |
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| 193 | to cupsomatic or such a print filter. In this case please |
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| 194 | check if you can switch your printer to PostScript mode |
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| 195 | or if there's a way to make it accept PostScript jobs. |
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| 196 | If yes then ensure that your workstations uses a PostScript |
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| 197 | printer driver, and replace the *cupsFilter line with the |
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| 198 | one pointing to the pykota filter. This should work, but |
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| 199 | is currently untested. |
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| 200 | If your printer really needs the original *cupsFilter line |
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| 201 | then you may not be able to use PyKota easily for now. |
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| 202 | |
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[716] | 203 | Add printers and users to the quota system and set their quota values : |
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[695] | 204 | |
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[725] | 205 | $ edpykota --add -P printer -S softlimit -H hardlimit user1 ... userN |
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[724] | 206 | |
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[725] | 207 | launching edpykota without any argument or with the --help |
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| 208 | command line option will show you all the possibilities. |
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[695] | 209 | |
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| 210 | Restart CUPS, for example under Debian GNU/Linux systems : |
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| 211 | |
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[725] | 212 | $ /etc/init.d/cupsys restart |
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[695] | 213 | |
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| 214 | Your users now should be able to print but not exceed their |
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| 215 | printing quota. |
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| 216 | |
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[794] | 217 | To see printer command usage, you can use : |
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| 218 | |
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| 219 | $ repykota --printer lp |
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| 220 | |
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| 221 | or : |
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| 222 | |
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| 223 | $ repykota |
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| 224 | |
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| 225 | which will print quota usage for all users on all printers, |
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| 226 | along with totals. |
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| 227 | |
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[724] | 228 | WARNING : as of today, 2003-02-06, group quotas are not |
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| 229 | implemented. |
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| 230 | |
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[741] | 231 | SECURITY : You should ensure that only the print quota administrator |
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[739] | 232 | can run the warnpykota command, but this is actually not |
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| 233 | enforced in the program. Any user able to launch warnpykota |
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| 234 | could flood over-quota users' email boxes. |
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[741] | 235 | |
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| 236 | You should ensure that only the print quota administrator |
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| 237 | can run the edpykota command, but this is actually not |
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[859] | 238 | enforced in the program. Otherwise, any user could modify |
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| 239 | his/her or other people's print quota. |
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[739] | 240 | |
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[741] | 241 | launching : chmod 750 /usr/bin/warnpykota /usr/bin/edpykota |
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| 242 | should make you reasonably safe. |
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| 243 | |
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[695] | 244 | ============================================================ |
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| 245 | |
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| 246 | Please e-mail bugs to: alet@librelogiciel.com (Jerome Alet) |
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