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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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20 | # |
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21 | # $Id$ |
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22 | # |
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23 | # |
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24 | |
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25 | import os |
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26 | import ConfigParser |
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27 | |
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28 | class PyKotaConfigError(Exception): |
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29 | """An exception for PyKota config related stuff.""" |
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30 | def __init__(self, message = ""): |
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31 | self.message = message |
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32 | Exception.__init__(self, message) |
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33 | def __repr__(self): |
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34 | return self.message |
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35 | __str__ = __repr__ |
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36 | |
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37 | class PyKotaConfig : |
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38 | """A class to deal with PyKota's configuration.""" |
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39 | def __init__(self, directory) : |
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40 | """Reads and checks the configuration file.""" |
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41 | self.isAdmin = 0 |
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42 | self.directory = directory |
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43 | self.filename = os.path.join(directory, "pykota.conf") |
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44 | if not os.path.isfile(self.filename) : |
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45 | raise PyKotaConfigError, _("Configuration file %s not found.") % self.filename |
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46 | self.config = ConfigParser.ConfigParser() |
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47 | self.config.read([self.filename]) |
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48 | |
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49 | def isTrue(self, option) : |
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50 | """Returns 1 if option is set to true, else 0.""" |
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51 | if (option is not None) and (option.strip().upper() in ['Y', 'YES', '1', 'ON', 'T', 'TRUE']) : |
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52 | return 1 |
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53 | else : |
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54 | return 0 |
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55 | |
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56 | def isFalse(self, option) : |
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57 | """Returns 1 if option is set to false, else 0.""" |
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58 | if (option is not None) and (option.strip().upper() in ['N', 'NO', '0', 'OFF', 'F', 'FALSE']) : |
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59 | return 1 |
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60 | else : |
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61 | return 0 |
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62 | |
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63 | def getPrinterNames(self) : |
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64 | """Returns the list of configured printers, i.e. all sections names minus 'global'.""" |
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65 | return [pname for pname in self.config.sections() if pname != "global"] |
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66 | |
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67 | def getGlobalOption(self, option, ignore=0) : |
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68 | """Returns an option from the global section, or raises a PyKotaConfigError if ignore is not set, else returns None.""" |
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69 | try : |
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70 | return self.config.get("global", option, raw=1) |
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71 | except (ConfigParser.NoSectionError, ConfigParser.NoOptionError) : |
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72 | if ignore : |
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73 | return |
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74 | else : |
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75 | raise PyKotaConfigError, _("Option %s not found in section global of %s") % (option, self.filename) |
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76 | |
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77 | def getPrinterOption(self, printername, option) : |
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78 | """Returns an option from the printer section, or the global section, or raises a PyKotaConfigError.""" |
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79 | globaloption = self.getGlobalOption(option, ignore=1) |
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80 | try : |
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81 | return self.config.get(printername, option, raw=1) |
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82 | except (ConfigParser.NoSectionError, ConfigParser.NoOptionError) : |
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83 | if globaloption is not None : |
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84 | return globaloption |
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85 | else : |
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86 | raise PyKotaConfigError, _("Option %s not found in section %s of %s") % (option, printername, self.filename) |
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87 | |
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88 | def getStorageBackend(self) : |
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89 | """Returns the storage backend information as a Python mapping.""" |
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90 | backendinfo = {} |
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91 | for option in [ "storagebackend", "storageserver", \ |
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92 | "storagename", "storageuser", \ |
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93 | ] : |
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94 | backendinfo[option] = self.getGlobalOption(option) |
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95 | backendinfo["storageuserpw"] = self.getGlobalOption("storageuserpw", ignore=1) # password is optional |
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96 | backendinfo["storageadmin"] = None |
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97 | backendinfo["storageadminpw"] = None |
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98 | adminconf = ConfigParser.ConfigParser() |
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99 | filename = os.path.join(self.directory, "pykotadmin.conf") |
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100 | adminconf.read([filename]) |
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101 | if adminconf.sections() : # were we able to read the file ? |
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102 | try : |
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103 | backendinfo["storageadmin"] = adminconf.get("global", "storageadmin", raw=1) |
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104 | except (ConfigParser.NoSectionError, ConfigParser.NoOptionError) : |
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105 | raise PyKotaConfigError, _("Option %s not found in section global of %s") % ("storageadmin", filename) |
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106 | else : |
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107 | self.isAdmin = 1 # We are a PyKota administrator |
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108 | try : |
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109 | backendinfo["storageadminpw"] = adminconf.get("global", "storageadminpw", raw=1) |
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110 | except (ConfigParser.NoSectionError, ConfigParser.NoOptionError) : |
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111 | pass # Password is optional |
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112 | return backendinfo |
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113 | |
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114 | def getLDAPInfo(self) : |
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115 | """Returns some hints for the LDAP backend.""" |
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116 | ldapinfo = {} |
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117 | for option in [ "userbase", "userrdn", \ |
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118 | "balancebase", "balancerdn", \ |
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119 | "groupbase", "grouprdn", "groupmembers", \ |
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120 | "printerbase", "printerrdn", \ |
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121 | "userquotabase", "groupquotabase", \ |
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122 | "jobbase", "lastjobbase", "billingcodebase", \ |
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123 | "newuser", "newgroup", \ |
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124 | "usermail", \ |
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125 | ] : |
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126 | ldapinfo[option] = self.getGlobalOption(option).strip() |
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127 | for field in ["newuser", "newgroup"] : |
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128 | if ldapinfo[field].lower().startswith('attach(') : |
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129 | ldapinfo[field] = ldapinfo[field][7:-1] |
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130 | |
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131 | # should we use TLS, by default (if unset) value is NO |
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132 | ldapinfo["ldaptls"] = self.isTrue(self.getGlobalOption("ldaptls", ignore=1)) |
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133 | ldapinfo["cacert"] = self.getGlobalOption("cacert", ignore=1) |
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134 | if ldapinfo["cacert"] : |
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135 | ldapinfo["cacert"] = ldapinfo["cacert"].strip() |
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136 | if ldapinfo["ldaptls"] : |
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137 | if not os.access(ldapinfo["cacert"] or "", os.R_OK) : |
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138 | raise PyKotaConfigError, _("Option ldaptls is set, but certificate %s is not readable.") % str(ldapinfo["cacert"]) |
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139 | return ldapinfo |
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140 | |
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141 | def getLoggingBackend(self) : |
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142 | """Returns the logging backend information.""" |
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143 | validloggers = [ "stderr", "system" ] |
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144 | try : |
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145 | logger = self.getGlobalOption("logger").lower() |
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146 | except PyKotaConfigError : |
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147 | logger = "system" |
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148 | if logger not in validloggers : |
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149 | raise PyKotaConfigError, _("Option logger only supports values in %s") % str(validloggers) |
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150 | return logger |
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151 | |
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152 | def getLogoURL(self) : |
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153 | """Returns the URL to use for the logo in the CGI scripts.""" |
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154 | url = self.getGlobalOption("logourl", ignore=1) or \ |
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155 | "http://www.librelogiciel.com/software/PyKota/pykota.png" |
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156 | return url.strip() |
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157 | |
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158 | def getLogoLink(self) : |
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159 | """Returns the URL to go to when the user clicks on the logo in the CGI scripts.""" |
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160 | url = self.getGlobalOption("logolink", ignore=1) or \ |
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161 | "http://www.librelogiciel.com/software/" |
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162 | return url.strip() |
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163 | |
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164 | def getAccounterBackend(self, printername) : |
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165 | """Returns the accounter backend to use for a given printer. |
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166 | |
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167 | if it is not set, it defaults to 'hardware' which means ask printer |
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168 | for its internal lifetime page counter. |
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169 | """ |
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170 | validaccounters = [ "hardware", "software" ] |
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171 | fullaccounter = self.getPrinterOption(printername, "accounter").strip() |
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172 | flower = fullaccounter.lower() |
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173 | if flower.startswith("software") or flower.startswith("hardware") : |
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174 | try : |
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175 | (accounter, args) = [x.strip() for x in fullaccounter.split('(', 1)] |
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176 | except ValueError : |
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177 | raise PyKotaConfigError, _("Invalid accounter %s for printer %s") % (fullaccounter, printername) |
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178 | if args.endswith(')') : |
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179 | args = args[:-1].strip() |
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180 | if (accounter == "hardware") and not args : |
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181 | raise PyKotaConfigError, _("Invalid accounter %s for printer %s") % (fullaccounter, printername) |
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182 | return (accounter.lower(), args) |
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183 | else : |
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184 | raise PyKotaConfigError, _("Option accounter in section %s only supports values in %s") % (printername, str(validaccounters)) |
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185 | |
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186 | def getPreHook(self, printername) : |
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187 | """Returns the prehook command line to launch, or None if unset.""" |
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188 | try : |
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189 | return self.getPrinterOption(printername, "prehook").strip() |
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190 | except PyKotaConfigError : |
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191 | return # No command to launch in the pre-hook |
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192 | |
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193 | def getPostHook(self, printername) : |
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194 | """Returns the posthook command line to launch, or None if unset.""" |
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195 | try : |
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196 | return self.getPrinterOption(printername, "posthook").strip() |
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197 | except PyKotaConfigError : |
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198 | return # No command to launch in the post-hook |
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199 | |
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200 | def getStripTitle(self, printername) : |
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201 | """Returns the striptitle directive's content, or None if unset.""" |
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202 | try : |
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203 | return self.getPrinterOption(printername, "striptitle").strip() |
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204 | except PyKotaConfigError : |
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205 | return # No prefix to strip off |
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206 | |
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207 | def getOverwriteJobTicket(self, printername) : |
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208 | """Returns the overwrite_jobticket directive's content, or None if unset.""" |
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209 | try : |
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210 | return self.getPrinterOption(printername, "overwrite_jobticket").strip() |
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211 | except PyKotaConfigError : |
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212 | return # No overwriting will be done |
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213 | |
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214 | def getUnknownBillingCode(self, printername) : |
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215 | """Returns the unknown_billingcode directive's content, or the default value if unset.""" |
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216 | validvalues = [ "CREATE", "DENY" ] |
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217 | try : |
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218 | fullvalue = self.getPrinterOption(printername, "unknown_billingcode") |
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219 | except PyKotaConfigError : |
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220 | return ("CREATE", None) |
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221 | else : |
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222 | try : |
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223 | value = [x.strip() for x in fullvalue.split('(', 1)] |
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224 | except ValueError : |
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225 | raise PyKotaConfigError, _("Invalid unknown_billingcode directive %s for printer %s") % (fullvalue, printername) |
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226 | if len(value) == 1 : |
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227 | value.append("") |
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228 | (value, args) = value |
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229 | if args.endswith(')') : |
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230 | args = args[:-1] |
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231 | value = value.upper() |
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232 | if (value == "DENY") and not args : |
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233 | return ("DENY", None) |
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234 | if value not in validvalues : |
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235 | raise PyKotaConfigError, _("Directive unknown_billingcode in section %s only supports values in %s") % (printername, str(validvalues)) |
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236 | return (value, args) |
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237 | |
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238 | def getPrinterEnforcement(self, printername) : |
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239 | """Returns if quota enforcement should be strict or laxist for the current printer.""" |
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240 | validenforcements = [ "STRICT", "LAXIST" ] |
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241 | try : |
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242 | enforcement = self.getPrinterOption(printername, "enforcement") |
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243 | except PyKotaConfigError : |
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244 | return "LAXIST" |
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245 | else : |
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246 | enforcement = enforcement.upper() |
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247 | if enforcement not in validenforcements : |
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248 | raise PyKotaConfigError, _("Option enforcement in section %s only supports values in %s") % (printername, str(validenforcements)) |
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249 | return enforcement |
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250 | |
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251 | def getPrinterOnAccounterError(self, printername) : |
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252 | """Returns what must be done whenever the accounter fails.""" |
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253 | validactions = [ "CONTINUE", "STOP" ] |
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254 | try : |
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255 | action = self.getPrinterOption(printername, "onaccountererror") |
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256 | except PyKotaConfigError : |
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257 | return "STOP" |
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258 | else : |
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259 | action = action.upper() |
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260 | if action not in validactions : |
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261 | raise PyKotaConfigError, _("Option onaccountererror in section %s only supports values in %s") % (printername, str(validactions)) |
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262 | return action |
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263 | |
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264 | def getPrinterPolicy(self, printername) : |
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265 | """Returns the default policy for the current printer.""" |
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266 | validpolicies = [ "ALLOW", "DENY", "EXTERNAL" ] |
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267 | try : |
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268 | fullpolicy = self.getPrinterOption(printername, "policy") |
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269 | except PyKotaConfigError : |
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270 | return ("DENY", None) |
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271 | else : |
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272 | try : |
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273 | policy = [x.strip() for x in fullpolicy.split('(', 1)] |
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274 | except ValueError : |
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275 | raise PyKotaConfigError, _("Invalid policy %s for printer %s") % (fullpolicy, printername) |
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276 | if len(policy) == 1 : |
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277 | policy.append("") |
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278 | (policy, args) = policy |
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279 | if args.endswith(')') : |
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280 | args = args[:-1] |
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281 | policy = policy.upper() |
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282 | if (policy == "EXTERNAL") and not args : |
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283 | raise PyKotaConfigError, _("Invalid policy %s for printer %s") % (fullpolicy, printername) |
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284 | if policy not in validpolicies : |
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285 | raise PyKotaConfigError, _("Option policy in section %s only supports values in %s") % (printername, str(validpolicies)) |
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286 | return (policy, args) |
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287 | |
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288 | def getCrashRecipient(self) : |
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289 | """Returns the email address of the software crash messages recipient.""" |
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290 | try : |
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291 | return self.getGlobalOption("crashrecipient") |
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292 | except : |
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293 | return |
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294 | |
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295 | def getSMTPServer(self) : |
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296 | """Returns the SMTP server to use to send messages to users.""" |
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297 | try : |
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298 | return self.getGlobalOption("smtpserver") |
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299 | except PyKotaConfigError : |
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300 | return "localhost" |
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301 | |
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302 | def getMailDomain(self) : |
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303 | """Returns the mail domain to use to send messages to users.""" |
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304 | try : |
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305 | return self.getGlobalOption("maildomain") |
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306 | except PyKotaConfigError : |
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307 | return |
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308 | |
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309 | def getAdminMail(self, printername) : |
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310 | """Returns the Email address of the Print Quota Administrator.""" |
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311 | try : |
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312 | return self.getPrinterOption(printername, "adminmail") |
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313 | except PyKotaConfigError : |
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314 | return "root@localhost" |
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315 | |
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316 | def getAdmin(self, printername) : |
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317 | """Returns the full name of the Print Quota Administrator.""" |
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318 | try : |
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319 | return self.getPrinterOption(printername, "admin") |
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320 | except PyKotaConfigError : |
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321 | return "root" |
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322 | |
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323 | def getMailTo(self, printername) : |
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324 | """Returns the recipient of email messages.""" |
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325 | validmailtos = [ "EXTERNAL", "NOBODY", "NONE", "NOONE", "BITBUCKET", "DEVNULL", "BOTH", "USER", "ADMIN" ] |
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326 | try : |
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327 | fullmailto = self.getPrinterOption(printername, "mailto") |
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328 | except PyKotaConfigError : |
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329 | return ("BOTH", None) |
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330 | else : |
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331 | try : |
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332 | mailto = [x.strip() for x in fullmailto.split('(', 1)] |
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333 | except ValueError : |
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334 | raise PyKotaConfigError, _("Invalid option mailto %s for printer %s") % (fullmailto, printername) |
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335 | if len(mailto) == 1 : |
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336 | mailto.append("") |
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337 | (mailto, args) = mailto |
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338 | if args.endswith(')') : |
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339 | args = args[:-1] |
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340 | mailto = mailto.upper() |
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341 | if (mailto == "EXTERNAL") and not args : |
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342 | raise PyKotaConfigError, _("Invalid option mailto %s for printer %s") % (fullmailto, printername) |
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343 | if mailto not in validmailtos : |
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344 | raise PyKotaConfigError, _("Option mailto in section %s only supports values in %s") % (printername, str(validmailtos)) |
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345 | return (mailto, args) |
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346 | |
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347 | def getMaxDenyBanners(self, printername) : |
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348 | """Returns the maximum number of deny banners to be printed for a particular user on a particular printer.""" |
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349 | try : |
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350 | maxdb = self.getPrinterOption(printername, "maxdenybanners") |
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351 | except PyKotaConfigError : |
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352 | return 0 # default value is to forbid printing a deny banner. |
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353 | try : |
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354 | value = int(maxdb.strip()) |
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355 | if value < 0 : |
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356 | raise ValueError |
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357 | except (TypeError, ValueError) : |
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358 | raise PyKotaConfigError, _("Invalid maximal deny banners counter %s") % maxdb |
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359 | else : |
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360 | return value |
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361 | |
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362 | def getGraceDelay(self, printername) : |
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363 | """Returns the grace delay in days.""" |
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364 | try : |
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365 | gd = self.getPrinterOption(printername, "gracedelay") |
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366 | except PyKotaConfigError : |
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367 | gd = 7 # default value of 7 days |
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368 | try : |
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369 | return int(gd) |
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370 | except (TypeError, ValueError) : |
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371 | raise PyKotaConfigError, _("Invalid grace delay %s") % gd |
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372 | |
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373 | def getPoorMan(self) : |
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374 | """Returns the poor man's threshold.""" |
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375 | try : |
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376 | pm = self.getGlobalOption("poorman") |
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377 | except PyKotaConfigError : |
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378 | pm = 1.0 # default value of 1 unit |
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379 | try : |
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380 | return float(pm) |
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381 | except (TypeError, ValueError) : |
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382 | raise PyKotaConfigError, _("Invalid poor man's threshold %s") % pm |
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383 | |
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384 | def getPoorWarn(self) : |
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385 | """Returns the poor man's warning message.""" |
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386 | try : |
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387 | return self.getGlobalOption("poorwarn") |
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388 | except PyKotaConfigError : |
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389 | return _("Your Print Quota account balance is Low.\nSoon you'll not be allowed to print anymore.\nPlease contact the Print Quota Administrator to solve the problem.") |
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390 | |
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391 | def getHardWarn(self, printername) : |
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392 | """Returns the hard limit error message.""" |
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393 | try : |
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394 | return self.getPrinterOption(printername, "hardwarn") |
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395 | except PyKotaConfigError : |
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396 | return _("You are not allowed to print anymore because\nyour Print Quota is exceeded on printer %s.") % printername |
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397 | |
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398 | def getSoftWarn(self, printername) : |
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399 | """Returns the soft limit error message.""" |
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400 | try : |
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401 | return self.getPrinterOption(printername, "softwarn") |
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402 | except PyKotaConfigError : |
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403 | return _("You will soon be forbidden to print anymore because\nyour Print Quota is almost reached on printer %s.") % printername |
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404 | |
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405 | def getPrivacy(self) : |
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406 | """Returns 1 if privacy is activated, else 0.""" |
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407 | return self.isTrue(self.getGlobalOption("privacy", ignore=1)) |
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408 | |
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409 | def getDebug(self) : |
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410 | """Returns 1 if debugging is activated, else 0.""" |
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411 | return self.isTrue(self.getGlobalOption("debug", ignore=1)) |
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412 | |
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413 | def getCaching(self) : |
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414 | """Returns 1 if database caching is enabled, else 0.""" |
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415 | return self.isTrue(self.getGlobalOption("storagecaching", ignore=1)) |
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416 | |
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417 | def getLDAPCache(self) : |
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418 | """Returns 1 if low-level LDAP caching is enabled, else 0.""" |
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419 | return self.isTrue(self.getGlobalOption("ldapcache", ignore=1)) |
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420 | |
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421 | def getDisableHistory(self) : |
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422 | """Returns 1 if we want to disable history, else 0.""" |
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423 | return self.isTrue(self.getGlobalOption("disablehistory", ignore=1)) |
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424 | |
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425 | def getUserNameToLower(self) : |
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426 | """Returns 1 if we want to convert usernames to lowercase when printing, else 0.""" |
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427 | return self.isTrue(self.getGlobalOption("utolower", ignore=1)) |
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428 | |
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429 | def getRejectUnknown(self) : |
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430 | """Returns 1 if we want to reject the creation of unknown users or groups, else 0.""" |
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431 | return self.isTrue(self.getGlobalOption("reject_unknown", ignore=1)) |
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432 | |
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433 | def getDenyDuplicates(self, printername) : |
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434 | """Returns 1 or a command if we want to deny duplicate jobs, else 0.""" |
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435 | try : |
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436 | denyduplicates = self.getPrinterOption(printername, "denyduplicates") |
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437 | except PyKotaConfigError : |
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438 | return 0 |
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439 | else : |
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440 | if self.isTrue(denyduplicates) : |
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441 | return 1 |
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442 | elif self.isFalse(denyduplicates) : |
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443 | return 0 |
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444 | else : |
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445 | # it's a command to run. |
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446 | return denyduplicates |
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447 | |
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448 | def getWinbindSeparator(self) : |
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449 | """Returns the winbind separator's value if it is set, else None.""" |
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450 | return self.getGlobalOption("winbind_separator", ignore=1) |
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451 | |
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452 | def getAccountBanner(self, printername) : |
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453 | """Returns which banner(s) to account for: NONE, BOTH, STARTING, ENDING.""" |
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454 | validvalues = [ "NONE", "BOTH", "STARTING", "ENDING" ] |
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455 | try : |
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456 | value = self.getPrinterOption(printername, "accountbanner") |
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457 | except PyKotaConfigError : |
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458 | return "BOTH" # Default value of BOTH |
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459 | else : |
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460 | value = value.strip().upper() |
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461 | if value not in validvalues : |
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462 | raise PyKotaConfigError, _("Option accountbanner in section %s only supports values in %s") % (printername, str(validvalues)) |
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463 | return value |
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464 | |
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465 | def getStartingBanner(self, printername) : |
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466 | """Returns the startingbanner value if set, else None.""" |
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467 | try : |
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468 | return self.getPrinterOption(printername, "startingbanner").strip() |
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469 | except PyKotaConfigError : |
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470 | return None |
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471 | |
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472 | def getEndingBanner(self, printername) : |
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473 | """Returns the endingbanner value if set, else None.""" |
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474 | try : |
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475 | return self.getPrinterOption(printername, "endingbanner").strip() |
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476 | except PyKotaConfigError : |
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477 | return None |
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478 | |
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479 | def getTrustJobSize(self, printername) : |
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480 | """Returns the normalized value of the trustjobsize's directive.""" |
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481 | try : |
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482 | value = self.getPrinterOption(printername, "trustjobsize").strip().upper() |
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483 | except PyKotaConfigError : |
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484 | return (None, "YES") |
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485 | else : |
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486 | if value == "YES" : |
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487 | return (None, "YES") |
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488 | try : |
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489 | (limit, replacement) = [p.strip() for p in value.split(">")[1].split(":")] |
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490 | limit = int(limit) |
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491 | try : |
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492 | replacement = int(replacement) |
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493 | except ValueError : |
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494 | if replacement != "PRECOMPUTED" : |
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495 | raise |
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496 | if limit < 0 : |
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497 | raise ValueError |
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498 | if (replacement != "PRECOMPUTED") and (replacement < 0) : |
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499 | raise ValueError |
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500 | except (IndexError, ValueError, TypeError) : |
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501 | raise PyKotaConfigError, _("Option trustjobsize for printer %s is incorrect") % printername |
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502 | return (limit, replacement) |
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