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/*
* Copyright (c) 2016-2023 Samsung Electronics Co., Ltd. All rights reserved.
*
* This file is licensed under the terms of MIT License or the Apache License
* Version 2.0 of your choice. See the LICENSE.MIT file for MIT license details.
* See the LICENSE file or the notice below for Apache License Version 2.0
* details.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* @brief Implementation of proper privilege dropping check utilities, client side
*/
#include <string>
#include <check-proper-drop.h>
#include <dpl/exception.h>
#include <dpl/log/log.h>
#include <filesystem.h>
namespace SecurityManager {
namespace CheckProperDrop {
namespace {
DECLARE_EXCEPTION_TYPE(SecurityManager::Exception, DropError)
} // namespace
std::unordered_set<int> checkNewThreads(const std::unordered_set<int>& ignored)
{
FS::FileNameVector current_tids;
for (unsigned i = 0; i < 10; ++i) {
try {
current_tids = FS::getSubDirectoriesFromDirectory("/proc/self/task", true);
break;
} catch(const FS::Exception::FileError&) {
if (i == 9)
throw;
/*
* This may happen if a thread disappears, an entry is removed from /proc and fstatat
* fails.
*/
LogWarning("Reading /proc/self/task/ failed. Retrying.");
}
}
std::unordered_set<int> result;
for (auto &tid_s : current_tids) {
int tid = atoi(tid_s.c_str());
if (ignored.count(tid) > 0) {
LogDebug("Thread " << tid_s << " ignored");
continue;
}
LogDebug("Thread " << tid_s << " new");
result.emplace(tid);
}
return result;
}
} // namespace CheckProperDrop
} // namespace SecurityManager
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