mirror of
https://github.com/SELinuxProject/setools
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102 lines
3.3 KiB
Python
102 lines
3.3 KiB
Python
# Copyright 2014, Tresys Technology, LLC
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#
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# This file is part of SETools.
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#
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# SETools 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
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# published by the Free Software Foundation, either version 2.1 of
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# the License, or (at your option) any later version.
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#
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# SETools 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
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# License along with SETools. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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import re
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import compquery
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class CommonQuery(compquery.ComponentQuery):
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"""Query common permission sets."""
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def __init__(self, policy,
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name="", name_regex=False,
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perms=set(), perms_equal=False, perms_regex=False):
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"""
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Parameters:
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name The name of the common to match.
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name_regex If true, regular expression matching will
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be used for matching the name.
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perms The permissions to match.
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perms_equal If true, only commons with permission sets
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that are equal to the criteria will
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match. Otherwise, any intersection
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will match.
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perms_regex If true, regular expression matching will be used
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on the permission names instead of set logic.
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"""
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self.policy = policy
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self.set_name(name, regex=name_regex)
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self.set_perms(perms, regex=perms_regex, equal=perms_equal)
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def results(self):
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"""Generator which yields all matching commons."""
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for com in self.policy.commons():
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if self.name and not self._match_regex(
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com,
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self.name,
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self.name_regex,
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self.name_cmp):
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continue
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if self.perms and not self._match_regex_or_set(
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com.perms,
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self.perms,
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self.perms_equal,
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self.perms_regex,
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self.perms_cmp):
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continue
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yield com
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def set_perms(self, perms, **opts):
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"""
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Set the criteria for the common's permissions.
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Parameter:
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perms Name to match the common's permissions.
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Keyword Options:
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regex If true, regular expression matching will be used.
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equal If true, the permisison set of the common
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must equal the permissions criteria to
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match. If false, any intersection in the
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critera will cause a match.
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Exceptions:
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NameError Invalid keyword option.
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"""
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self.perms = perms
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for k in opts.keys():
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if k == "regex":
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self.perms_regex = opts[k]
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elif k == "equal":
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self.perms_equal = opts[k]
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else:
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raise NameError("Invalid permissions option: {0}".format(k))
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if self.perms_regex:
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self.perms_cmp = re.compile(self.perms)
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else:
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self.perms_cmp = None
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