mirror of https://github.com/borgbackup/borg.git
185 lines
4.4 KiB
Python
185 lines
4.4 KiB
Python
import os
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from ..constants import * # NOQA
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from ..crypto.low_level import IntegrityError as IntegrityErrorBase
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modern_ec = os.environ.get("BORG_EXIT_CODES", "legacy") == "modern"
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class ErrorBase(Exception):
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"""ErrorBase: {}"""
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# Error base class
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# if we raise such an Error and it is only caught by the uppermost
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# exception handler (that exits short after with the given exit_code),
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# it is always a (fatal and abrupt) error, never just a warning.
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exit_mcode = EXIT_ERROR # modern, more specific exit code (defaults to EXIT_ERROR)
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# show a traceback?
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traceback = False
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def __init__(self, *args):
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super().__init__(*args)
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self.args = args
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def get_message(self):
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return type(self).__doc__.format(*self.args)
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__str__ = get_message
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@property
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def exit_code(self):
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# legacy: borg used to always use rc 2 (EXIT_ERROR) for all errors.
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# modern: users can opt in to more specific return codes, using BORG_EXIT_CODES:
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return self.exit_mcode if modern_ec else EXIT_ERROR
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class Error(ErrorBase):
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"""Error: {}"""
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class ErrorWithTraceback(Error):
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"""Error: {}"""
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# like Error, but show a traceback also
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traceback = True
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class IntegrityError(ErrorWithTraceback, IntegrityErrorBase):
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"""Data integrity error: {}"""
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exit_mcode = 90
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class DecompressionError(IntegrityError):
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"""Decompression error: {}"""
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exit_mcode = 92
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class CancelledByUser(Error):
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"""Cancelled by user."""
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exit_mcode = 3
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class RTError(Error):
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"""Runtime Error: {}"""
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class CommandError(Error):
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"""Command Error: {}"""
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exit_mcode = 4
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class BorgWarning:
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"""Warning: {}"""
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# Warning base class
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# please note that this class and its subclasses are NOT exceptions, we do not raise them.
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# so this is just to have inheritance, inspectability and the exit_code property.
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exit_mcode = EXIT_WARNING # modern, more specific exit code (defaults to EXIT_WARNING)
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def __init__(self, *args):
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self.args = args
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def get_message(self):
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return type(self).__doc__.format(*self.args)
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__str__ = get_message
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@property
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def exit_code(self):
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# legacy: borg used to always use rc 1 (EXIT_WARNING) for all warnings.
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# modern: users can opt in to more specific return codes, using BORG_EXIT_CODES:
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return self.exit_mcode if modern_ec else EXIT_WARNING
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class FileChangedWarning(BorgWarning):
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"""{}: file changed while we backed it up"""
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exit_mcode = 100
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class IncludePatternNeverMatchedWarning(BorgWarning):
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"""Include pattern '{}' never matched."""
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exit_mcode = 101
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class BackupWarning(BorgWarning):
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"""{}: {}"""
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# this is to wrap a caught BackupError exception, so it can be given to print_warning_instance
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@property
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def exit_code(self):
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if not modern_ec:
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return EXIT_WARNING
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exc = self.args[1]
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assert isinstance(exc, BackupError)
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return exc.exit_mcode
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class BackupError(ErrorBase):
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"""{}: backup error"""
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# Exception raised for non-OSError-based exceptions while accessing backup files.
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exit_mcode = 102
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class BackupRaceConditionError(BackupError):
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"""{}: file type or inode changed while we backed it up (race condition, skipped file)"""
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# Exception raised when encountering a critical race condition while trying to back up a file.
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exit_mcode = 103
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class BackupOSError(BackupError):
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"""{}: {}"""
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# Wrapper for OSError raised while accessing backup files.
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#
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# Borg does different kinds of IO, and IO failures have different consequences.
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# This wrapper represents failures of input file or extraction IO.
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# These are non-critical and are only reported (warnings).
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#
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# Any unwrapped IO error is critical and aborts execution (for example repository IO failure).
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exit_mcode = 104
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def __init__(self, op, os_error):
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self.op = op
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self.os_error = os_error
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self.errno = os_error.errno
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self.strerror = os_error.strerror
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self.filename = os_error.filename
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def __str__(self):
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if self.op:
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return f"{self.op}: {self.os_error}"
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else:
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return str(self.os_error)
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class BackupPermissionError(BackupOSError):
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"""{}: {}"""
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exit_mcode = 105
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class BackupIOError(BackupOSError):
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"""{}: {}"""
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exit_mcode = 106
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class BackupFileNotFoundError(BackupOSError):
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"""{}: {}"""
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exit_mcode = 107
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