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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 | # # errors.py: exception classes used throughout anaconda # # Copyright (C) 2012 Red Hat, Inc. All rights reserved. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. from pyanaconda.core.i18n import _, C_ from pyanaconda.flags import flags __all__ = ["ERROR_RAISE", "ERROR_CONTINUE", "ERROR_RETRY", "errorHandler", "InvalidImageSizeError", "MissingImageError", "ScriptError", "NonInteractiveError", "CmdlineError", "ExitError"] class InvalidImageSizeError(Exception): def __init__(self, message, filename): Exception.__init__(self, message) self.filename = filename class MissingImageError(Exception): pass class ScriptError(Exception): def __init__(self, lineno, details): Exception.__init__(self) self.lineno = lineno self.details = details class NonInteractiveError(Exception): pass class CmdlineError(NonInteractiveError): pass class RemovedModuleError(ImportError): pass class PasswordCryptError(Exception): def __init__(self, algo): Exception.__init__(self) self.algo = algo class ZIPLError(Exception): pass class ExitError(RuntimeError): pass # These constants are returned by the callback in the ErrorHandler class. # Each represents a different kind of action the caller can take: # # ERROR_RAISE - This is a fatal error, and anaconda can do nothing but quit # or raise an exception. This then feeds into the exception # handling framework. # # ERROR_CONTINUE - anaconda should continue with whatever it was going to do. # This result comes from non-fatal errors, asking yes/no # questions, and the like. # # ERROR_RETRY - This is a serious problem, but anaconda should attempt to # try again. Continued failures may eventually result in an # ERROR_RAISE. ERROR_RAISE = 0 ERROR_CONTINUE = 1 ERROR_RETRY = 2 ### ### TOP-LEVEL ERROR HANDLING OBJECT ### class ErrorHandler(object): """This object makes up one part of anaconda's error handling system. This part is the UI-agnostic error callback. Throughout anaconda, various error conditions can occur in places that need to pop up a dialog, but should not know anything about the type or details of the UI. In order to accomplish this, each pyanaconda.ui.UserInterface subclass presents a common set of dialog methods. The entry point to these methods is through the cb method of this class, which acts as a dispatcher to the appropriate handler, which in turn pops up the correct kind of dialog. The result of all this is one of the ERROR_* constants defined elsewhere in this module. The original calling code must then interpret this result and take the appropriate action. For details on the other parts of the error handling system, see the documentation for pyanaconda.ui.UserInterface and pyanaconda.exception. """ def __init__(self, ui=None): self.ui = ui def _partitionErrorHandler(self, exn): message = _("The following errors occurred with your partitioning:\n\n%(errortxt)s\n\n" "The installation will now terminate.") % {"errortxt": exn} self.ui.showError(message) return ERROR_RAISE def _fsResizeHandler(self, exn): message = _("An error occurred while resizing the device %s.") % exn if exn.details: message += "\n\n%s" % exn.details self.ui.showError(message) return ERROR_RAISE def _storageResetHandler(self, exn): message = (_("There is a problem with your existing storage " "configuration: %(errortxt)s\n\n" "You must resolve this matter before the installation can " "proceed. There is a shell available for use which you " "can access by pressing ctrl-alt-f1 and then ctrl-b 2." "\n\nOnce you have resolved the issue you can retry the " "storage scan. If you do not fix it you will have to exit " "the installer.") % {"errortxt": exn}) details = _(exn.suggestion) buttons = (C_("GUI|Storage Detailed Error Dialog", "_Exit Installer"), C_("GUI|Storage Detailed Error Dialog", "_Retry")) if self.ui.showDetailedError(message, details, buttons=buttons): return ERROR_RETRY else: return ERROR_RAISE def _noDisksHandler(self, exn): message = _("An error has occurred - no valid devices were found on " "which to create new file systems. Please check your " "hardware for the cause of this problem.") self.ui.showError(message) return ERROR_RAISE def _fstabTypeMismatchHandler(self, exn): # FIXME: include the two types in the message instead of including # the raw exception text message = _("There is an entry in your /etc/fstab file that contains " "an invalid or incorrect file system type:\n\n") message += " " + str(exn) self.ui.showError(message) def _invalidImageSizeHandler(self, exn): message = _("The ISO image %s has a size which is not " "a multiple of 2048 bytes. This may mean " "it was corrupted on transfer to this computer." "\n\n" "It is recommended that you exit and abort your " "installation, but you can choose to continue if " "you think this is in error. Would you like to " "continue using this image?") % exn.filename if self.ui.showYesNoQuestion(message): return ERROR_CONTINUE else: return ERROR_RAISE def _missingImageHandler(self, exn): message = _("The installer has tried to mount the " "installation image, but cannot find it on " "the hard drive.\n\n" "Should I try again to locate the image?") if self.ui.showYesNoQuestion(message): return ERROR_RETRY else: return ERROR_RAISE def _noSuchGroupHandler(self, exn): if exn.required: message = _("The group '%s' is required for this installation. " "This group does not exist. This is a fatal error and " "installation will be aborted.") % exn.group self.ui.showError(message) return ERROR_RAISE elif exn.adding: message = _("You have specified that the group '%s' should be " "installed. This group does not exist. Would you like " "to ignore this group and continue with " "installation?") % exn.group else: message = _("You have specified that the group '%s' should be " "excluded from installation. This group does not exist. " "Would you like to ignore this group and continue with " "installation?") % exn.group if self.ui.showYesNoQuestion(message): return ERROR_CONTINUE else: return ERROR_RAISE def _noSuchPackageHandler(self, exn): if exn.required: message = _("The package '%s' is required for this installation. " "This package does not exist. This is a fatal error and " "installation will be aborted.") % exn.package self.ui.showError(message) return ERROR_RAISE else: message = _("You have specified that the package '%s' should be " "installed. This package does not exist. Would you " "like to ignore this package and continue with " "installation?") % exn.package if self.ui.showYesNoQuestion(message): return ERROR_CONTINUE else: return ERROR_RAISE def _scriptErrorHandler(self, exn): message = _("There was an error running the kickstart script at line " "%(lineno)s. This is a fatal error and installation will be " "aborted. The details of this error are:\n\n%(details)s") % \ {"lineno": exn.lineno, "details": exn.details} self.ui.showError(message) return ERROR_RAISE def _payloadInstallHandler(self, exn): message = _("The following error occurred while installing. This is " "a fatal error and installation will be aborted.") message += "\n\n" + str(exn) self.ui.showError(message) return ERROR_RAISE def _dependencyErrorHandler(self, exn): message = _("The following software marked for installation has errors. " "This is likely caused by an error with\nyour installation source.") details = str(exn) self.ui.showDetailedError(message, details) return ERROR_RAISE def _bootLoaderErrorHandler(self, exn): message = _("The following error occurred while installing the boot loader. " "The system will not be bootable. " "Would you like to ignore this and continue with " "installation?") message += "\n\n" + str(exn) if self.ui.showYesNoQuestion(message): return ERROR_CONTINUE else: return ERROR_RAISE def _passwordCryptErrorHandler(self, exn): message = _("Unable to encrypt password: unsupported algorithm %s") % exn.algo self.ui.showError(message) return ERROR_RAISE def _ziplErrorHandler(self, exn): details = str(exn) message = _("Installation was stopped due to an error installing the " "boot loader. The exact error message is:\n\n%s\n\n" "The installer will now terminate.") % details self.ui.showError(message) return ERROR_RAISE def cb(self, exn): """This method is the callback that all error handling should pass through. The return value is one of the ERROR_* constants defined in this module, though the exact constant returned depends on the kind of exception being handled. Arguments: exn -- An instance of some Exception. """ rc = ERROR_RAISE if not self.ui: raise exn if not flags.ksprompt: raise NonInteractiveError("Non interactive installation failed: %s" % exn) _map = {"PartitioningError": self._partitionErrorHandler, "FSResizeError": self._fsResizeHandler, "UnusableConfigurationError": self._storageResetHandler, "DiskLabelScanError": self._storageResetHandler, "CorruptGPTError": self._storageResetHandler, "DuplicateVGError": self._storageResetHandler, "NoDisksError": self._noDisksHandler, "FSTabTypeMismatchError": self._fstabTypeMismatchHandler, "InvalidImageSizeError": self._invalidImageSizeHandler, "MissingImageError": self._missingImageHandler, "NoSuchGroup": self._noSuchGroupHandler, "NoSuchPackage": self._noSuchPackageHandler, "ScriptError": self._scriptErrorHandler, "PayloadInstallError": self._payloadInstallHandler, "DependencyError": self._dependencyErrorHandler, "BootLoaderError": self._bootLoaderErrorHandler, "PasswordCryptError": self._passwordCryptErrorHandler, "ZIPLError": self._ziplErrorHandler} if exn.__class__.__name__ in _map: rc = _map[exn.__class__.__name__](exn) return rc # Create a singleton of the ErrorHandler class. It is up to the UserInterface # subclass to set errorHandler.ui before this class is ever used, or there will # be trouble. errorHandler = ErrorHandler()