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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 "util.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 {
template <typename F>
void RunTest(F&& test_function) {
auto subcontext = Subcontext({"dummy_path"}, kTestContext);
ASSERT_NE(0, subcontext.pid());
test_function(subcontext);
if (subcontext.pid() > 0) {
kill(subcontext.pid(), SIGTERM);
kill(subcontext.pid(), SIGKILL);
}
}
TEST(subcontext, CheckDifferentPid) {
RunTest([](auto& subcontext) {
auto result = subcontext.Execute(std::vector<std::string>{"return_pids_as_error"});
ASSERT_FALSE(result.ok());
auto pids = Split(result.error().message(), " ");
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) {
if (getuid() != 0) {
GTEST_SKIP() << "Skipping test, must be run as root.";
return;
}
RunTest([](auto& subcontext) {
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_RESULT_OK(result);
EXPECT_TRUE(WaitForProperty("init.test.subcontext", "success", 10s));
});
}
TEST(subcontext, MultipleCommands) {
RunTest([](auto& subcontext) {
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_RESULT_OK(result);
}
auto result = subcontext.Execute(std::vector<std::string>{"return_words_as_error"});
ASSERT_FALSE(result.ok());
EXPECT_EQ(Join(expected_words, " "), result.error().message());
EXPECT_EQ(first_pid, subcontext.pid());
});
}
TEST(subcontext, RecoverAfterAbort) {
RunTest([](auto& subcontext) {
auto first_pid = subcontext.pid();
auto result = subcontext.Execute(std::vector<std::string>{"cause_log_fatal"});
ASSERT_FALSE(result.ok());
auto result2 = subcontext.Execute(std::vector<std::string>{"generate_sane_error"});
ASSERT_FALSE(result2.ok());
EXPECT_EQ("Sane error!", result2.error().message());
EXPECT_NE(subcontext.pid(), first_pid);
});
}
TEST(subcontext, ContextString) {
RunTest([](auto& subcontext) {
auto result = subcontext.Execute(std::vector<std::string>{"return_context_as_error"});
ASSERT_FALSE(result.ok());
ASSERT_EQ(kTestContext, result.error().message());
});
}
TEST(subcontext, TriggerShutdown) {
static constexpr const char kTestShutdownCommand[] = "reboot,test-shutdown-command";
static std::string trigger_shutdown_command;
trigger_shutdown = [](const std::string& command) { trigger_shutdown_command = command; };
RunTest([](auto& subcontext) {
auto result = subcontext.Execute(
std::vector<std::string>{"trigger_shutdown", kTestShutdownCommand});
ASSERT_RESULT_OK(result);
});
EXPECT_EQ(kTestShutdownCommand, trigger_shutdown_command);
}
TEST(subcontext, ExpandArgs) {
RunTest([](auto& subcontext) {
auto args = std::vector<std::string>{
"first",
"${ro.hardware}",
"$$third",
};
auto result = subcontext.ExpandArgs(args);
ASSERT_RESULT_OK(result);
ASSERT_EQ(3U, result->size());
EXPECT_EQ(args[0], result->at(0));
EXPECT_EQ(GetProperty("ro.hardware", ""), result->at(1));
EXPECT_EQ("$third", result->at(2));
});
}
TEST(subcontext, ExpandArgsFailure) {
RunTest([](auto& subcontext) {
auto args = std::vector<std::string>{
"first",
"${",
};
auto result = subcontext.ExpandArgs(args);
ASSERT_FALSE(result.ok());
EXPECT_EQ("unexpected end of string in '" + args[1] + "', looking for }",
result.error().message());
});
}
BuiltinFunctionMap BuildTestFunctionMap() {
// For CheckDifferentPid
auto do_return_pids_as_error = [](const BuiltinArguments& args) -> Result<void> {
return Error() << getpid() << " " << getppid();
};
// For SetProp
auto do_setprop = [](const BuiltinArguments& args) {
android::base::SetProperty(args[1], args[2]);
return Result<void>{};
};
// For MultipleCommands
// Using a shared_ptr to extend lifetime of words to both lambdas
auto words = std::make_shared<std::vector<std::string>>();
auto do_add_word = [words](const BuiltinArguments& args) {
words->emplace_back(args[1]);
return Result<void>{};
};
auto do_return_words_as_error = [words](const BuiltinArguments& args) -> Result<void> {
return Error() << Join(*words, " ");
};
// For RecoverAfterAbort
auto do_cause_log_fatal = [](const BuiltinArguments& args) -> Result<void> {
// Since this is an expected failure, disable debuggerd to not generate a tombstone.
signal(SIGABRT, SIG_DFL);
return Error() << std::string(4097, 'f');
};
auto do_generate_sane_error = [](const BuiltinArguments& args) -> Result<void> {
return Error() << "Sane error!";
};
// For ContextString
auto do_return_context_as_error = [](const BuiltinArguments& args) -> Result<void> {
return Error() << args.context;
};
auto do_trigger_shutdown = [](const BuiltinArguments& args) -> Result<void> {
trigger_shutdown(args[1]);
return {};
};
// clang-format off
BuiltinFunctionMap test_function_map = {
{"return_pids_as_error", {0, 0, {true, do_return_pids_as_error}}},
{"setprop", {2, 2, {true, do_setprop}}},
{"add_word", {1, 1, {true, do_add_word}}},
{"return_words_as_error", {0, 0, {true, do_return_words_as_error}}},
{"cause_log_fatal", {0, 0, {true, do_cause_log_fatal}}},
{"generate_sane_error", {0, 0, {true, do_generate_sane_error}}},
{"return_context_as_error", {0, 0, {true, do_return_context_as_error}}},
{"trigger_shutdown", {1, 1, {true, do_trigger_shutdown}}},
};
// clang-format on
return test_function_map;
}
} // namespace init
} // namespace android
// init_test.cpp contains the main entry point for all init tests.
int SubcontextTestChildMain(int argc, char** argv) {
auto test_function_map = android::init::BuildTestFunctionMap();
return android::init::SubcontextMain(argc, argv, &test_function_map);
}
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