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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
from .descriptors import CriteriaSetDescriptor
from .mixins import MatchName
from .policyrep import Role
from .query import PolicyQuery
from .util import match_regex_or_set
class RoleQuery(MatchName, PolicyQuery):
"""
Query SELinux policy roles.
Parameter:
policy The policy to query.
Keyword Parameters/Class attributes:
name The role name to match.
name_regex If true, regular expression matching
will be used on the role names.
types The type to match.
types_equal If true, only roles with type sets
that are equal to the criteria will
match. Otherwise, any intersection
will match.
types_regex If true, regular expression matching
will be used on the type names instead
of set logic.
"""
types = CriteriaSetDescriptor("types_regex", "lookup_type")
types_equal: bool = False
types_regex: bool = False
def __init__(self, policy, **kwargs) -> None:
super(RoleQuery, self).__init__(policy, **kwargs)
self.log = logging.getLogger(__name__)
def results(self) -> Iterable[Role]:
"""Generator which yields all matching roles."""
self.log.info("Generating role results from {0.policy}".format(self))
self._match_name_debug(self.log)
self.log.debug("Types: {0.types!r}, regex: {0.types_regex}, "
"eq: {0.types_equal}".format(self))
for r in self.policy.roles():
if not self._match_name(r):
continue
if self.types and not match_regex_or_set(
set(r.types()),
self.types,
self.types_equal,
self.types_regex):
continue
yield r