130 lines
3.8 KiB
Python
130 lines
3.8 KiB
Python
# -*- encoding: utf8 -*-
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#
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# The Qubes OS Project, http://www.qubes-os.org
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#
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# Copyright (C) 2017 Marek Marczykowski-Górecki
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# <marmarek@invisiblethingslab.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with this program; if not, see <http://www.gnu.org/licenses/>.
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'''Exception hierarchy.'''
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class QubesException(Exception):
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'''Base exception for all Qubes-related errors.'''
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def __init__(self, message_format, *args, **kwargs):
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# TODO: handle translations
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super(QubesException, self).__init__(
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message_format % tuple(int(d) if d.isdigit() else d for d in args),
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**kwargs)
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class QubesVMNotFoundError(QubesException, KeyError):
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'''Domain cannot be found in the system'''
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class QubesVMError(QubesException):
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'''Some problem with domain state.'''
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class QubesVMNotStartedError(QubesVMError):
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'''Domain is not started.
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This exception is thrown when machine is halted, but should be started
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(that is, either running or paused).
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'''
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class QubesVMNotRunningError(QubesVMNotStartedError):
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'''Domain is not running.
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This exception is thrown when machine should be running but is either
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halted or paused.
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'''
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class QubesVMNotPausedError(QubesVMNotStartedError):
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'''Domain is not paused.
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This exception is thrown when machine should be paused, but is not.
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'''
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class QubesVMNotSuspendedError(QubesVMError):
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'''Domain is not suspended.
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This exception is thrown when machine should be suspended but is either
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halted or running.
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'''
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class QubesVMNotHaltedError(QubesVMError):
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'''Domain is not halted.
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This exception is thrown when machine should be halted, but is not (either
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running or paused).
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'''
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class QubesNoTemplateError(QubesVMError):
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'''Cannot start domain, because there is no template'''
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class QubesValueError(QubesException, ValueError):
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'''Cannot set some value, because it is invalid, out of bounds, etc.'''
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pass
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class QubesPropertyValueError(QubesValueError):
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'''Cannot set value of qubes.property, because user-supplied value is wrong.
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'''
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class QubesNotImplementedError(QubesException, NotImplementedError):
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'''Thrown at user when some feature is not implemented'''
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class BackupCancelledError(QubesException):
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'''Thrown at user when backup was manually cancelled'''
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class QubesMemoryError(QubesException, MemoryError):
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'''Cannot start domain, because not enough memory is available'''
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class QubesFeatureNotFoundError(QubesException, KeyError):
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'''Feature not set for a given domain'''
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class StoragePoolException(QubesException):
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''' A general storage exception '''
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class QubesDaemonCommunicationError(QubesException, IOError):
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'''Error while communicating with qubesd, may mean insufficient
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permissions, as well'''
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# pylint: disable=too-many-ancestors
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class QubesDaemonNoResponseError(QubesDaemonCommunicationError):
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'''Got empty response from qubesd'''
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class QubesPropertyAccessError(QubesException, AttributeError):
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'''Failed to read/write property value, cause is unknown (insufficient
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permissions, no such property, invalid value, other)'''
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def __init__(self, prop):
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super(QubesPropertyAccessError, self).__init__(
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'Failed to access \'%s\' property' % prop)
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