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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
#include <linux/futex.h>
#include <pthread.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string>
#include <thread>
#include <vector>
#include <android-base/file.h>
#include <android-base/scopeguard.h>
#include <android-base/test_utils.h>
#include <gtest/gtest.h>
#include <selinux/selinux.h>
using namespace std::string_literals;
template <typename T, typename F>
void WriteFromMultipleThreads(std::vector<std::pair<std::string, T>>& files_and_parameters,
F function) {
auto num_threads = files_and_parameters.size();
pthread_barrier_t barrier;
pthread_barrier_init(&barrier, nullptr, num_threads);
auto barrier_destroy =
android::base::make_scope_guard([&barrier]() { pthread_barrier_destroy(&barrier); });
auto make_thread_function = [&function, &barrier](const auto& file, const auto& parameter) {
return [&]() {
function(parameter);
pthread_barrier_wait(&barrier);
android::base::WriteStringToFile("<empty>", file);
};
};
std::vector<std::thread> threads;
// TODO(b/63712782): Structured bindings + templated containers are broken in clang :(
// for (const auto& [file, parameter] : files_and_parameters) {
for (const auto& pair : files_and_parameters) {
const auto& file = pair.first;
const auto& parameter = pair.second;
threads.emplace_back(std::thread(make_thread_function(file, parameter)));
}
for (auto& thread : threads) {
thread.join();
}
}
TEST(ueventd, setegid_IsPerThread) {
if (getuid() != 0) {
GTEST_LOG_(INFO) << "Skipping test, must be run as root.";
return;
}
TemporaryDir dir;
gid_t gid = 0;
std::vector<std::pair<std::string, gid_t>> files_and_gids;
std::generate_n(std::back_inserter(files_and_gids), 100, [&gid, &dir]() {
gid++;
return std::pair(dir.path + "/gid_"s + std::to_string(gid), gid);
});
WriteFromMultipleThreads(files_and_gids, [](gid_t gid) { EXPECT_EQ(0, setegid(gid)); });
for (const auto& [file, expected_gid] : files_and_gids) {
struct stat info;
ASSERT_EQ(0, stat(file.c_str(), &info));
EXPECT_EQ(expected_gid, info.st_gid);
}
}
TEST(ueventd, setfscreatecon_IsPerThread) {
if (getuid() != 0) {
GTEST_LOG_(INFO) << "Skipping test, must be run as root.";
return;
}
if (!is_selinux_enabled() || security_getenforce() == 1) {
GTEST_LOG_(INFO) << "Skipping test, SELinux must be enabled and in permissive mode.";
return;
}
const char* const contexts[] = {
"u:object_r:audio_device:s0",
"u:object_r:sensors_device:s0",
"u:object_r:video_device:s0"
"u:object_r:zero_device:s0",
};
TemporaryDir dir;
std::vector<std::pair<std::string, std::string>> files_and_contexts;
for (const char* context : contexts) {
files_and_contexts.emplace_back(dir.path + "/context_"s + context, context);
}
WriteFromMultipleThreads(files_and_contexts, [](const std::string& context) {
EXPECT_EQ(0, setfscreatecon(context.c_str()));
});
for (const auto& [file, expected_context] : files_and_contexts) {
char* file_context;
ASSERT_GT(getfilecon(file.c_str(), &file_context), 0);
EXPECT_EQ(expected_context, file_context);
freecon(file_context);
}
}
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