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# Copyright 2014-2015, Tresys Technology, LLC
#
# SPDX-License-Identifier: LGPL-2.1-only
#
import logging
import re
from typing import Iterable, Optional
from .descriptors import CriteriaDescriptor
from .mixins import MatchContext
from .policyrep import Genfscon
from .query import PolicyQuery
from .util import match_regex
class GenfsconQuery(MatchContext, PolicyQuery):
"""
Query genfscon statements.
Parameter:
policy The policy to query.
Keyword Parameters/Class attributes:
fs The criteria to match the file system type.
fs_regex If true, regular expression matching
will be used on the file system type.
path The criteria to match the path.
path_regex If true, regular expression matching
will be used on the path.
user The criteria to match the context's user.
user_regex If true, regular expression matching
will be used on the user.
role The criteria to match the context's role.
role_regex If true, regular expression matching
will be used on the role.
type_ The criteria to match the context's type.
type_regex If true, regular expression matching
will be used on the type.
range_ The criteria to match the context's range.
range_subset If true, the criteria will match if it is a subset
of the context's range.
range_overlap If true, the criteria will match if it overlaps
any of the context's range.
range_superset If true, the criteria will match if it is a superset
of the context's range.
range_proper If true, use proper superset/subset operations.
No effect if not using set operations.
"""
filetype: Optional[int] = None
fs = CriteriaDescriptor("fs_regex")
fs_regex: bool = False
path = CriteriaDescriptor("path_regex")
path_regex: bool = False
def __init__(self, policy, **kwargs) -> None:
super(GenfsconQuery, self).__init__(policy, **kwargs)
self.log = logging.getLogger(__name__)
def results(self) -> Iterable[Genfscon]:
"""Generator which yields all matching genfscons."""
self.log.info("Generating genfscon results from {0.policy}".format(self))
self.log.debug("FS: {0.fs!r}, regex: {0.fs_regex}".format(self))
self.log.debug("Path: {0.path!r}, regex: {0.path_regex}".format(self))
self.log.debug("Filetype: {0.filetype!r}".format(self))
self._match_context_debug(self.log)
for genfs in self.policy.genfscons():
if self.fs and not match_regex(
genfs.fs,
self.fs,
self.fs_regex):
continue
if self.path and not match_regex(
genfs.path,
self.path,
self.path_regex):
continue
if self.filetype and not self.filetype == genfs.filetype:
continue
if not self._match_context(genfs.context):
continue
yield genfs