7d6af00aca
Some system services (e.g. SoundTriggerMiddleware) assume that
whenever they start, the audio HAL is in its default (reset) state.
init.rc scripts tie the lifetimes of the audio HAL and system
processes, but when using stop/start this is not the case, and this
may cause spurious crashes in this case.
stop/start is apparently being relied on in some test infrastructure,
so this change is needed to avoid causing problems for those systems
or false detection of problems, which are not actually present in
production.
Bug: 154029444
Test: Manually verify that the audio HAL is stopped on
'adb shell stop', restarted on 'adb shell start' and that the
system boots correctly after.
Change-Id: I39878b978b47a169c4fe446c43d7347809d15e06
Merged-In: I39878b978b47a169c4fe446c43d7347809d15e06
94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
/*
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* Copyright (C) 2019 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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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <iostream>
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#include <string>
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#include <vector>
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#include <android-base/properties.h>
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using android::base::GetProperty;
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using android::base::SetProperty;
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using namespace std::literals;
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static void ControlService(bool start, const std::string& service) {
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if (!android::base::SetProperty(start ? "ctl.start" : "ctl.stop", service)) {
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std::cerr << "Unable to " << (start ? "start" : "stop") << " service '" << service
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<< "'\nSee dmesg for error reason." << std::endl;
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exit(EXIT_FAILURE);
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}
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}
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static void ControlDefaultServices(bool start) {
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std::vector<std::string> services = {
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"netd",
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"surfaceflinger",
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"audioserver",
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"zygote",
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};
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// Only start zygote_secondary if not single arch.
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std::string zygote_configuration = GetProperty("ro.zygote", "");
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if (zygote_configuration != "zygote32" && zygote_configuration != "zygote64") {
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services.emplace_back("zygote_secondary");
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}
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if (start) {
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for (const auto& service : services) {
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ControlService(true, service);
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}
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} else {
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for (auto it = services.crbegin(); it != services.crend(); ++it) {
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ControlService(false, *it);
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}
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}
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}
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static int StartStop(int argc, char** argv, bool start) {
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if (getuid()) {
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std::cerr << "Must be root" << std::endl;
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return EXIT_FAILURE;
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}
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if (argc == 1) {
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ControlDefaultServices(start);
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}
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if (argc == 2 && argv[1] == "--help"s) {
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std::cout << "usage: " << (start ? "start" : "stop")
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<< " [SERVICE...]\n"
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"\n"
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<< (start ? "Starts" : "Stops")
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<< " the given system service, or netd/surfaceflinger/zygotes." << std::endl;
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return EXIT_SUCCESS;
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}
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for (int i = 1; i < argc; ++i) {
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ControlService(start, argv[i]);
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}
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return EXIT_SUCCESS;
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}
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extern "C" int start_main(int argc, char** argv) {
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return StartStop(argc, argv, true);
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}
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extern "C" int stop_main(int argc, char** argv) {
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return StartStop(argc, argv, false);
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}
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