1 | #! /usr/bin/env python |
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2 | |
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3 | # PyKota - Print Quotas for CUPS |
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4 | # |
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5 | # (c) 2003 Jerome Alet <alet@librelogiciel.com> |
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6 | # You're welcome to redistribute this software under the |
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7 | # terms of the GNU General Public Licence version 2.0 |
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8 | # or, at your option, any higher version. |
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9 | # |
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10 | # You can read the complete GNU GPL in the file COPYING |
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11 | # which should come along with this software, or visit |
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12 | # the Free Software Foundation's WEB site http://www.fsf.org |
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13 | # |
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14 | # $Id$ |
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15 | # |
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16 | # $Log$ |
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17 | # Revision 1.19 2003/02/10 11:28:45 jalet |
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18 | # Localization |
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19 | # |
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20 | # Revision 1.18 2003/02/10 01:02:17 jalet |
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21 | # External requester is about to work, but I must sleep |
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22 | # |
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23 | # Revision 1.17 2003/02/09 13:05:43 jalet |
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24 | # Internationalization continues... |
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25 | # |
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26 | # Revision 1.16 2003/02/09 12:56:53 jalet |
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27 | # Internationalization begins... |
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28 | # |
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29 | # Revision 1.15 2003/02/08 22:09:52 jalet |
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30 | # Name check method moved here |
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31 | # |
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32 | # Revision 1.14 2003/02/07 10:42:45 jalet |
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33 | # Indentation problem |
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34 | # |
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35 | # Revision 1.13 2003/02/07 08:34:16 jalet |
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36 | # Test wrt date limit was wrong |
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37 | # |
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38 | # Revision 1.12 2003/02/06 23:20:02 jalet |
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39 | # warnpykota doesn't need any user/group name argument, mimicing the |
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40 | # warnquota disk quota tool. |
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41 | # |
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42 | # Revision 1.11 2003/02/06 22:54:33 jalet |
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43 | # warnpykota should be ok |
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44 | # |
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45 | # Revision 1.10 2003/02/06 15:03:11 jalet |
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46 | # added a method to set the limit date |
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47 | # |
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48 | # Revision 1.9 2003/02/06 10:39:23 jalet |
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49 | # Preliminary edpykota work. |
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50 | # |
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51 | # Revision 1.8 2003/02/06 09:19:02 jalet |
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52 | # More robust behavior (hopefully) when the user or printer is not managed |
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53 | # correctly by the Quota System : e.g. cupsFilter added in ppd file, but |
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54 | # printer and/or user not 'yet?' in storage. |
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55 | # |
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56 | # Revision 1.7 2003/02/06 00:00:45 jalet |
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57 | # Now includes the printer name in email messages |
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58 | # |
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59 | # Revision 1.6 2003/02/05 23:55:02 jalet |
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60 | # Cleaner email messages |
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61 | # |
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62 | # Revision 1.5 2003/02/05 23:45:09 jalet |
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63 | # Better DateTime manipulation wrt grace delay |
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64 | # |
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65 | # Revision 1.4 2003/02/05 23:26:22 jalet |
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66 | # Incorrect handling of grace delay |
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67 | # |
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68 | # Revision 1.3 2003/02/05 22:16:20 jalet |
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69 | # DEVICE_URI is undefined outside of CUPS, i.e. for normal command line tools |
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70 | # |
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71 | # Revision 1.2 2003/02/05 22:10:29 jalet |
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72 | # Typos |
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73 | # |
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74 | # Revision 1.1 2003/02/05 21:28:17 jalet |
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75 | # Initial import into CVS |
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76 | # |
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77 | # |
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78 | # |
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79 | |
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80 | import sys |
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81 | import os |
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82 | import getopt |
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83 | import smtplib |
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84 | import gettext |
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85 | import locale |
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86 | |
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87 | from mx import DateTime |
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88 | |
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89 | from pykota import version, config, storage, logger |
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90 | |
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91 | class PyKotaToolError(Exception): |
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92 | """An exception for PyKota config related stuff.""" |
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93 | def __init__(self, message = ""): |
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94 | self.message = message |
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95 | Exception.__init__(self, message) |
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96 | def __repr__(self): |
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97 | return self.message |
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98 | __str__ = __repr__ |
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99 | |
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100 | class PyKotaTool : |
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101 | """Base class for all PyKota command line tools.""" |
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102 | def __init__(self, isfilter=0, doc="PyKota %s (c) 2003 %s" % (version.__version__, version.__author__)) : |
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103 | """Initializes the command line tool.""" |
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104 | # locale stuff |
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105 | try : |
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106 | locale.setlocale(locale.LC_ALL, "") |
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107 | gettext.install("pykota") |
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108 | except (locale.Error, IOError) : |
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109 | gettext.NullTranslations().install() |
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110 | |
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111 | # pykota specific stuff |
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112 | self.documentation = doc |
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113 | self.config = config.PyKotaConfig(os.environ.get("CUPS_SERVERROOT", "/etc/cups")) |
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114 | self.logger = logger.openLogger(self.config) |
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115 | self.storage = storage.openConnection(self.config, asadmin=(not isfilter)) |
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116 | self.printername = os.environ.get("PRINTER", None) |
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117 | self.smtpserver = self.config.getSMTPServer() |
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118 | self.admin = self.config.getAdmin() |
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119 | self.adminmail = self.config.getAdminMail() |
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120 | |
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121 | def display_version_and_quit(self) : |
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122 | """Displays version number, then exists successfully.""" |
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123 | print version.__version__ |
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124 | sys.exit(0) |
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125 | |
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126 | def display_usage_and_quit(self) : |
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127 | """Displays command line usage, then exists successfully.""" |
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128 | print self.documentation |
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129 | sys.exit(0) |
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130 | |
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131 | def parseCommandline(self, argv, short, long, allownothing=0) : |
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132 | """Parses the command line, controlling options.""" |
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133 | # split options in two lists: those which need an argument, those which don't need any |
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134 | withoutarg = [] |
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135 | witharg = [] |
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136 | lgs = len(short) |
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137 | i = 0 |
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138 | while i < lgs : |
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139 | ii = i + 1 |
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140 | if (ii < lgs) and (short[ii] == ':') : |
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141 | # needs an argument |
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142 | witharg.append(short[i]) |
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143 | ii = ii + 1 # skip the ':' |
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144 | else : |
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145 | # doesn't need an argument |
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146 | withoutarg.append(short[i]) |
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147 | i = ii |
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148 | |
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149 | for option in long : |
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150 | if option[-1] == '=' : |
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151 | # needs an argument |
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152 | witharg.append(option[:-1]) |
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153 | else : |
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154 | # doesn't need an argument |
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155 | withoutarg.append(option) |
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156 | |
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157 | # we begin with all possible options unset |
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158 | parsed = {} |
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159 | for option in withoutarg + witharg : |
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160 | parsed[option] = None |
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161 | |
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162 | # then we parse the command line |
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163 | args = [] # to not break if something unexpected happened |
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164 | try : |
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165 | options, args = getopt.getopt(argv, short, long) |
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166 | if options : |
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167 | for (o, v) in options : |
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168 | # we skip the '-' chars |
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169 | lgo = len(o) |
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170 | i = 0 |
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171 | while (i < lgo) and (o[i] == '-') : |
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172 | i = i + 1 |
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173 | o = o[i:] |
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174 | if o in witharg : |
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175 | # needs an argument : set it |
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176 | parsed[o] = v |
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177 | elif o in withoutarg : |
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178 | # doesn't need an argument : boolean |
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179 | parsed[o] = 1 |
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180 | else : |
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181 | # should never occur |
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182 | raise PyKotaToolError, "Unexpected problem when parsing command line" |
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183 | elif (not args) and (not allownothing) and sys.stdin.isatty() : # no option and no argument, we display help if we are a tty |
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184 | self.display_usage_and_quit() |
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185 | except getopt.error, msg : |
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186 | sys.stderr.write("%s\n" % msg) |
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187 | sys.stderr.flush() |
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188 | self.display_usage_and_quit() |
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189 | return (parsed, args) |
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190 | |
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191 | def isValidName(self, name) : |
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192 | """Checks if a user or printer name is valid.""" |
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193 | # unfortunately Python 2.1 string modules doesn't define ascii_letters... |
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194 | asciiletters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' |
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195 | digits = '0123456789' |
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196 | if name[0] in asciiletters : |
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197 | validchars = asciiletters + digits + "-_" |
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198 | for c in name[1:] : |
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199 | if c not in validchars : |
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200 | return 0 |
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201 | return 1 |
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202 | return 0 |
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203 | |
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204 | def sendMessage(self, touser, fullmessage) : |
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205 | """Sends an email message containing headers to some user.""" |
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206 | if "@" not in touser : |
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207 | touser = "%s@%s" % (touser, self.smtpserver) |
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208 | server = smtplib.SMTP(self.smtpserver) |
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209 | server.sendmail(self.adminmail, [touser], fullmessage) |
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210 | server.quit() |
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211 | |
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212 | def sendMessageToUser(self, username, subject, message) : |
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213 | """Sends an email message to a user.""" |
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214 | message += _("\n\nPlease contact your system administrator :\n\n\t%s - <%s>\n") % (self.admin, self.adminmail) |
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215 | self.sendMessage(username, "Subject: %s\n\n%s" % (subject, message)) |
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216 | |
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217 | def sendMessageToAdmin(self, subject, message) : |
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218 | """Sends an email message to the Print Quota administrator.""" |
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219 | self.sendMessage(self.adminmail, "Subject: %s\n\n%s" % (subject, message)) |
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220 | |
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221 | def checkUserPQuota(self, username, printername) : |
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222 | """Checks the user quota on a printer and deny or accept the job.""" |
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223 | quota = self.storage.getUserPQuota(username, printername) |
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224 | if quota is None : |
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225 | # Unknown user or printer or combination |
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226 | policy = self.config.getPrinterPolicy(printername) |
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227 | if policy in [None, "ALLOW"] : |
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228 | action = "ALLOW" |
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229 | else : |
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230 | action = "DENY" |
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231 | self.logger.log_message(_("Unable to match user %s on printer %s, applying default policy (%s)") % (username, printername, action), "warn") |
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232 | return (action, None, None) |
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233 | else : |
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234 | pagecounter = quota["pagecounter"] |
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235 | softlimit = quota["softlimit"] |
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236 | hardlimit = quota["hardlimit"] |
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237 | datelimit = quota["datelimit"] |
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238 | if datelimit is not None : |
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239 | datelimit = DateTime.ISO.ParseDateTime(datelimit) |
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240 | if softlimit is not None : |
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241 | if pagecounter < softlimit : |
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242 | action = "ALLOW" |
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243 | elif hardlimit is not None : |
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244 | if softlimit <= pagecounter < hardlimit : |
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245 | now = DateTime.now() |
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246 | if datelimit is None : |
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247 | datelimit = now + self.config.getGraceDelay() |
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248 | self.storage.setDateLimit(username, printername, datelimit) |
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249 | if now < datelimit : |
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250 | action = "WARN" |
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251 | else : |
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252 | action = "DENY" |
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253 | else : |
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254 | action = "DENY" |
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255 | else : |
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256 | action = "DENY" |
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257 | else : |
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258 | action = "ALLOW" |
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259 | return (action, (hardlimit - pagecounter), datelimit) |
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260 | |
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261 | def warnGroupPQuota(self, username, printername=None) : |
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262 | """Checks a user quota and send him a message if quota is exceeded on current printer.""" |
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263 | pname = printername or self.printername |
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264 | raise PyKotaToolError, _("Group quotas are currently not implemented.") |
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265 | |
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266 | def warnUserPQuota(self, username, printername=None) : |
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267 | """Checks a user quota and send him a message if quota is exceeded on current printer.""" |
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268 | pname = printername or self.printername |
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269 | (action, grace, gracedate) = self.checkUserPQuota(username, pname) |
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270 | if action == "DENY" : |
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271 | if (grace is not None) and (gracedate is not None) : |
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272 | # only when both user and printer are known |
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273 | adminmessage = _("Print Quota exceeded for user %s on printer %s") % (username, pname) |
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274 | self.logger.log_message(adminmessage) |
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275 | self.sendMessageToUser(username, _("Print Quota Exceeded"), _("You are not allowed to print anymore because\nyour Print Quota is exceeded on printer %s.") % pname) |
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276 | self.sendMessageToAdmin("Print Quota", adminmessage) |
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277 | elif action == "WARN" : |
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278 | adminmessage = _("Print Quota soft limit exceeded for user %s on printer %s") % (username, pname) |
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279 | self.logger.log_message(adminmessage) |
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280 | self.sendMessageToUser(username, _("Print Quota Exceeded"), _("You will soon be forbidden to print anymore because\nyour Print Quota is almost reached on printer %s.") % pname) |
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281 | self.sendMessageToAdmin(_("Print Quota"), adminmessage) |
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282 | return action |
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283 | |
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