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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 "subcontext.h"
#include <unistd.h>
#include <chrono>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <gtest/gtest.h>
#include <selinux/selinux.h>
#include "builtin_arguments.h"
#include "test_function_map.h"
using namespace std::literals;
using android::base::GetProperty;
using android::base::Join;
using android::base::SetProperty;
using android::base::Split;
using android::base::WaitForProperty;
namespace android {
namespace init {
// I would use test fixtures, but I cannot skip the test if not root with them, so instead we have
// this test runner.
template <typename F>
void RunTest(F&& test_function) {
if (getuid() != 0) {
GTEST_LOG_(INFO) << "Skipping test, must be run as root.";
return;
}
char* context;
ASSERT_EQ(0, getcon(&context));
auto context_string = std::string(context);
free(context);
auto subcontext = Subcontext("dummy_path", context_string);
ASSERT_NE(0, subcontext.pid());
test_function(subcontext, context_string);
if (subcontext.pid() > 0) {
kill(subcontext.pid(), SIGTERM);
kill(subcontext.pid(), SIGKILL);
}
}
TEST(subcontext, CheckDifferentPid) {
RunTest([](auto& subcontext, auto& context_string) {
auto result = subcontext.Execute(std::vector<std::string>{"return_pids_as_error"});
ASSERT_FALSE(result);
auto pids = Split(result.error_string(), " ");
ASSERT_EQ(2U, pids.size());
auto our_pid = std::to_string(getpid());
EXPECT_NE(our_pid, pids[0]);
EXPECT_EQ(our_pid, pids[1]);
});
}
TEST(subcontext, SetProp) {
RunTest([](auto& subcontext, auto& context_string) {
SetProperty("init.test.subcontext", "fail");
WaitForProperty("init.test.subcontext", "fail");
auto args = std::vector<std::string>{
"setprop",
"init.test.subcontext",
"success",
};
auto result = subcontext.Execute(args);
ASSERT_TRUE(result) << result.error();
EXPECT_TRUE(WaitForProperty("init.test.subcontext", "success", 10s));
});
}
TEST(subcontext, MultipleCommands) {
RunTest([](auto& subcontext, auto& context_string) {
auto first_pid = subcontext.pid();
auto expected_words = std::vector<std::string>{
"this",
"is",
"a",
"test",
};
for (const auto& word : expected_words) {
auto args = std::vector<std::string>{
"add_word",
word,
};
auto result = subcontext.Execute(args);
ASSERT_TRUE(result) << result.error();
}
auto result = subcontext.Execute(std::vector<std::string>{"return_words_as_error"});
ASSERT_FALSE(result);
EXPECT_EQ(Join(expected_words, " "), result.error_string());
EXPECT_EQ(first_pid, subcontext.pid());
});
}
TEST(subcontext, RecoverAfterAbort) {
RunTest([](auto& subcontext, auto& context_string) {
auto first_pid = subcontext.pid();
auto result = subcontext.Execute(std::vector<std::string>{"cause_log_fatal"});
ASSERT_FALSE(result);
auto result2 = subcontext.Execute(std::vector<std::string>{"generate_sane_error"});
ASSERT_FALSE(result2);
EXPECT_EQ("Sane error!", result2.error_string());
EXPECT_NE(subcontext.pid(), first_pid);
});
}
TEST(subcontext, ContextString) {
RunTest([](auto& subcontext, auto& context_string) {
auto result = subcontext.Execute(std::vector<std::string>{"return_context_as_error"});
ASSERT_FALSE(result);
ASSERT_EQ(context_string, result.error_string());
});
}
TEST(subcontext, ExpandArgs) {
RunTest([](auto& subcontext, auto& context_string) {
auto args = std::vector<std::string>{
"first",
"${ro.hardware}",
"$$third",
};
auto result = subcontext.ExpandArgs(args);
ASSERT_TRUE(result) << result.error();
ASSERT_EQ(3U, result->size());
EXPECT_EQ(args[0], result->at(0));
EXPECT_EQ(GetProperty("ro.hardware", ""), result->at(1));
EXPECT_EQ("$third", result->at(2));
});
}
TEST(subcontext, ExpandArgsFailure) {
RunTest([](auto& subcontext, auto& context_string) {
auto args = std::vector<std::string>{
"first",
"${",
};
auto result = subcontext.ExpandArgs(args);
ASSERT_FALSE(result);
EXPECT_EQ("Failed to expand '" + args[1] + "'", result.error_string());
});
}
TestFunctionMap BuildTestFunctionMap() {
TestFunctionMap test_function_map;
// For CheckDifferentPid
test_function_map.Add("return_pids_as_error", 0, 0, true,
[](const BuiltinArguments& args) -> Result<Success> {
return Error() << getpid() << " " << getppid();
});
// For SetProp
test_function_map.Add("setprop", 2, 2, true, [](const BuiltinArguments& args) {
android::base::SetProperty(args[1], args[2]);
return Success();
});
// For MultipleCommands
// Using a shared_ptr to extend lifetime of words to both lambdas
auto words = std::make_shared<std::vector<std::string>>();
test_function_map.Add("add_word", 1, 1, true, [words](const BuiltinArguments& args) {
words->emplace_back(args[1]);
return Success();
});
test_function_map.Add("return_words_as_error", 0, 0, true,
[words](const BuiltinArguments& args) -> Result<Success> {
return Error() << Join(*words, " ");
});
// For RecoverAfterAbort
test_function_map.Add("cause_log_fatal", 0, 0, true,
[](const BuiltinArguments& args) -> Result<Success> {
return Error() << std::string(4097, 'f');
});
test_function_map.Add(
"generate_sane_error", 0, 0, true,
[](const BuiltinArguments& args) -> Result<Success> { return Error() << "Sane error!"; });
// For ContextString
test_function_map.Add(
"return_context_as_error", 0, 0, true,
[](const BuiltinArguments& args) -> Result<Success> { return Error() << args.context; });
return test_function_map;
}
} // namespace init
} // namespace android
int main(int argc, char** argv) {
if (argc > 1 && !strcmp(basename(argv[1]), "subcontext")) {
auto test_function_map = android::init::BuildTestFunctionMap();
return android::init::SubcontextMain(argc, argv, &test_function_map);
}
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}