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 35 namespace android { 36 namespace init { 37 38 struct CapDeleter { operatorCapDeleter39 void operator()(cap_t caps) const { cap_free(caps); } 40 }; 41 42 using CapSet = std::bitset<CAP_LAST_CAP + 1>; 43 using ScopedCaps = std::unique_ptr<std::remove_pointer<cap_t>::type, CapDeleter>; 44 45 int LookupCap(const std::string& cap_name); 46 bool CapAmbientSupported(); 47 unsigned int GetLastValidCap(); 48 bool SetCapsForExec(const CapSet& to_keep); 49 bool DropInheritableCaps(); 50 51 } // namespace init 52 } // namespace android 53 54 #endif // _INIT_CAPABILITIES_H 55