f3f824ee42
Partners have expressed interest in using the 'capabilities' keyword in init, so make the code more resilient: -Check that ambient capabilities are supported by the kernel. -Check that the last valid cap at runtime is not higher than what's in kernel headers. -Check that the user is not requesting a capability present in kernel headers but not supported by the kernel at runtime. -Don't attempt to drop bounding set capabilities not supported at runtime. This CL also fixes a small bug where < should have been used instead of <=, and uses 'static' instead of anonymous namespaces. Bug: 32438163 Test: Use a test service that uses capabilities. Test: Apply in internal tree and test with angler and rild. Change-Id: Ia271cc7eb389d1d526d61f897261e4bac4d19e5d
30 lines
969 B
C++
30 lines
969 B
C++
// Copyright (C) 2016 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _INIT_CAPABILITIES_H
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#define _INIT_CAPABILITIES_H
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#include <linux/capability.h>
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#include <bitset>
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#include <string>
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using CapSet = std::bitset<CAP_LAST_CAP + 1>;
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int LookupCap(const std::string& cap_name);
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bool CapAmbientSupported();
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unsigned int GetLastValidCap();
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bool SetCapsForExec(const CapSet& to_keep);
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#endif // _INIT_CAPABILITIES_H
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