1// Copyright (C) 2016 The Android Open Source Project
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//      http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#ifndef _INIT_CAPABILITIES_H
16#define _INIT_CAPABILITIES_H
17
18#include <sys/capability.h>
19
20#include <bitset>
21#include <string>
22#include <type_traits>
23
24#if !defined(__ANDROID__)
25#ifndef CAP_BLOCK_SUSPEND
26#define CAP_BLOCK_SUSPEND 36
27#endif
28#ifndef CAP_AUDIT_READ
29#define CAP_AUDIT_READ 37
30#endif
31#undef CAP_LAST_CAP
32#define CAP_LAST_CAP CAP_AUDIT_READ
33#endif
34
35namespace android {
36namespace init {
37
38struct CapDeleter {
39    void operator()(cap_t caps) const { cap_free(caps); }
40};
41
42using CapSet = std::bitset<CAP_LAST_CAP + 1>;
43using ScopedCaps = std::unique_ptr<std::remove_pointer<cap_t>::type, CapDeleter>;
44
45int LookupCap(const std::string& cap_name);
46bool CapAmbientSupported();
47unsigned int GetLastValidCap();
48bool SetCapsForExec(const CapSet& to_keep);
49bool DropInheritableCaps();
50
51}  // namespace init
52}  // namespace android
53
54#endif  // _INIT_CAPABILITIES_H
55