1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
# Copyright 2014, Tresys Technology, LLC
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools. If not, see
# <http://www.gnu.org/licenses/>.
#
class PolicySymbol(object):
"""This is a base class for all policy objects."""
def __init__(self, policy, qpol_symbol):
"""
Parameters:
policy The low-level policy object.
qpol_symbol The low-level policy symbol object.
"""
assert qpol_symbol
self.policy = policy
self.qpol_symbol = qpol_symbol
def __str__(self):
return self.qpol_symbol.name(self.policy)
def __hash__(self):
return hash(str(self))
def __eq__(self, other):
try:
return self.qpol_symbol.this == other.qpol_symbol.this
except AttributeError:
return str(self) == str(other)
def __ne__(self, other):
return not self == other
def __lt__(self, other):
"""Comparison used by Python sorting functions."""
return str(self) < str(other)
def __repr__(self):
return "<{0.__class__.__name__}(<qpol_policy_t id={1}>,\"{0}\")>".format(
self, id(self.policy))
def __deepcopy__(self, memo):
# shallow copy as all of the members are immutable
cls = self.__class__
newobj = cls.__new__(cls)
newobj.policy = self.policy
newobj.qpol_symbol = self.qpol_symbol
memo[id(self)] = newobj
return newobj
def statement(self):
"""
A rendering of the policy statement. This should be
overridden by subclasses.
"""
raise NotImplementedError
|
