mirror of
https://github.com/SELinuxProject/setools
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78 lines
2.8 KiB
Python
78 lines
2.8 KiB
Python
# Copyright 2014-2015, Tresys Technology, LLC
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#
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# SPDX-License-Identifier: LGPL-2.1-only
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#
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import logging
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import re
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from typing import Iterable
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from .descriptors import CriteriaDescriptor, CriteriaSetDescriptor
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from .mixins import MatchContext
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from .policyrep import FSUse, FSUseRuletype
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from .query import PolicyQuery
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from .util import match_regex
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class FSUseQuery(MatchContext, PolicyQuery):
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"""
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Query fs_use_* statements.
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Parameter:
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policy The policy to query.
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Keyword Parameters/Class attributes:
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ruletype The rule type(s) to match.
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fs The criteria to match the file system type.
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fs_regex If true, regular expression matching
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will be used on the file system type.
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user The criteria to match the context's user.
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user_regex If true, regular expression matching
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will be used on the user.
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role The criteria to match the context's role.
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role_regex If true, regular expression matching
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will be used on the role.
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type_ The criteria to match the context's type.
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type_regex If true, regular expression matching
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will be used on the type.
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range_ The criteria to match the context's range.
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range_subset If true, the criteria will match if it is a subset
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of the context's range.
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range_overlap If true, the criteria will match if it overlaps
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any of the context's range.
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range_superset If true, the criteria will match if it is a superset
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of the context's range.
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range_proper If true, use proper superset/subset operations.
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No effect if not using set operations.
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"""
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ruletype = CriteriaSetDescriptor(enum_class=FSUseRuletype)
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fs = CriteriaDescriptor("fs_regex")
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fs_regex: bool = False
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def __init__(self, policy, **kwargs) -> None:
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super(FSUseQuery, self).__init__(policy, **kwargs)
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self.log = logging.getLogger(__name__)
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def results(self) -> Iterable[FSUse]:
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"""Generator which yields all matching fs_use_* statements."""
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self.log.info("Generating fs_use_* results from {0.policy}".format(self))
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self.log.debug("Ruletypes: {0.ruletype}".format(self))
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self.log.debug("FS: {0.fs!r}, regex: {0.fs_regex}".format(self))
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self._match_context_debug(self.log)
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for fsu in self.policy.fs_uses():
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if self.ruletype and fsu.ruletype not in self.ruletype:
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continue
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if self.fs and not match_regex(
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fsu.fs,
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self.fs,
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self.fs_regex):
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continue
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if not self._match_context(fsu.context):
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continue
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yield fsu
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