| // Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // This file is meant for debugging use to manually trigger a proper |
| // suspend, excercising the full path through the power manager. |
| // The actual work to suspend the system is done by powerd_suspend. |
| // This tool will block and only exit after it has received a D-Bus |
| // resume signal from powerd. |
| |
| #include <unistd.h> |
| |
| #include <base/at_exit.h> |
| #include <base/bind.h> |
| #include <base/command_line.h> |
| #include <base/files/file_util.h> |
| #include <base/logging.h> |
| #include <base/message_loop/message_loop.h> |
| #include <base/strings/string_number_conversions.h> |
| #include <base/time/time.h> |
| #include <chromeos/dbus/service_constants.h> |
| #include <chromeos/flag_helper.h> |
| #include <dbus/bus.h> |
| #include <dbus/message.h> |
| #include <dbus/object_proxy.h> |
| |
| namespace { |
| |
| // The sysfs entry that controls RTC wake alarms. To set an alarm, write |
| // into this file the time of the alarm in seconds since the epoch. |
| const char kRtcWakeAlarmPath[] = "/sys/class/rtc/rtc0/wakealarm"; |
| |
| // Exits when powerd announces that the suspend attempt has completed. |
| void OnSuspendDone(dbus::Signal* signal) { |
| base::MessageLoop::current()->QuitNow(); |
| } |
| |
| // Handles the result of an attempt to connect to a D-Bus signal. |
| void OnDBusSignalConnected(const std::string& interface, |
| const std::string& signal, |
| bool success) { |
| CHECK(success) << "Unable to connect to " << interface << "." << signal; |
| } |
| |
| // Invoked if a SuspendDone signal announcing resume isn't received before |
| // FLAGS_timeout. |
| void OnTimeout() { |
| LOG(FATAL) << "Did not receive a " << power_manager::kSuspendDoneSignal |
| << " signal within the timeout."; |
| } |
| |
| } // namespace |
| |
| int main(int argc, char* argv[]) { |
| DEFINE_int32(delay, 1, "Delay before suspending in seconds. Useful if " |
| "running interactively to ensure that typing this command " |
| "isn't recognized as user activity that cancels the suspend " |
| "request."); |
| DEFINE_int32(timeout, 0, "How long to wait for a resume signal in seconds."); |
| DEFINE_uint64(wakeup_count, 0, "Wakeup count to pass to powerd or 0 if " |
| "unset."); |
| DEFINE_int32(wakeup_timeout, 0, "RTC alarm timeout in seconds. Sets an RTC " |
| "alarm that fires after the given interval. Useful " |
| "to ensure that device resumes while testing remotely."); |
| |
| chromeos::FlagHelper::Init(argc, argv, |
| "Instruct powerd to suspend the system."); |
| base::AtExitManager at_exit_manager; |
| base::MessageLoopForIO message_loop; |
| |
| dbus::Bus::Options options; |
| options.bus_type = dbus::Bus::SYSTEM; |
| scoped_refptr<dbus::Bus> bus(new dbus::Bus(options)); |
| CHECK(bus->Connect()); |
| dbus::ObjectProxy* powerd_proxy = bus->GetObjectProxy( |
| power_manager::kPowerManagerServiceName, |
| dbus::ObjectPath(power_manager::kPowerManagerServicePath)); |
| |
| if (FLAGS_delay) |
| sleep(FLAGS_delay); |
| |
| // Set an RTC alarm to wake up the system. |
| if (FLAGS_wakeup_timeout) { |
| std::string alarm_string = |
| base::IntToString(time(NULL) + FLAGS_wakeup_timeout); |
| CHECK(base::WriteFile(base::FilePath(kRtcWakeAlarmPath), |
| alarm_string.c_str(), |
| alarm_string.length())); |
| } |
| |
| powerd_proxy->ConnectToSignal( |
| power_manager::kPowerManagerInterface, |
| power_manager::kSuspendDoneSignal, |
| base::Bind(&OnSuspendDone), |
| base::Bind(&OnDBusSignalConnected)); |
| |
| // Send a suspend request. |
| dbus::MethodCall method_call( |
| power_manager::kPowerManagerInterface, |
| power_manager::kRequestSuspendMethod); |
| if (FLAGS_wakeup_count) { |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendUint64(FLAGS_wakeup_count); |
| } |
| scoped_ptr<dbus::Response> response( |
| powerd_proxy->CallMethodAndBlock( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT)); |
| CHECK(response) << power_manager::kRequestSuspendMethod << " failed"; |
| |
| // Schedule a task to fire after the timeout. |
| if (FLAGS_timeout) { |
| base::MessageLoop::current()->PostDelayedTask(FROM_HERE, |
| base::Bind(&OnTimeout), base::TimeDelta::FromSeconds(FLAGS_timeout)); |
| } |
| |
| message_loop.Run(); |
| return 0; |
| } |