1 // 2 // Copyright (C) 2015 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #include "update_engine/cros/daemon_chromeos.h" 18 19 #include <sysexits.h> 20 21 #include <base/bind.h> 22 #include <base/location.h> 23 24 #include "update_engine/cros/real_system_state.h" 25 26 using brillo::Daemon; 27 using std::unique_ptr; 28 29 namespace chromeos_update_engine { 30 CreateInstance()31unique_ptr<DaemonBase> DaemonBase::CreateInstance() { 32 return std::make_unique<DaemonChromeOS>(); 33 } 34 OnInit()35int DaemonChromeOS::OnInit() { 36 // Register the |subprocess_| singleton with this Daemon as the signal 37 // handler. 38 subprocess_.Init(this); 39 40 int exit_code = Daemon::OnInit(); 41 if (exit_code != EX_OK) 42 return exit_code; 43 44 // Initialize update engine global state. 45 // TODO(deymo): Move the initialization to a factory method avoiding the 46 // explicit re-usage of the |bus| instance, shared between D-Bus service and 47 // D-Bus client calls. 48 RealSystemState::SetInstance(&system_state_); 49 50 // Create the DBus service. 51 dbus_adaptor_.reset(new UpdateEngineAdaptor()); 52 SystemState::Get()->update_attempter()->AddObserver(dbus_adaptor_.get()); 53 54 dbus_adaptor_->RegisterAsync( 55 base::Bind(&DaemonChromeOS::OnDBusRegistered, base::Unretained(this))); 56 LOG(INFO) << "Waiting for DBus object to be registered."; 57 return EX_OK; 58 } 59 OnDBusRegistered(bool succeeded)60void DaemonChromeOS::OnDBusRegistered(bool succeeded) { 61 if (!succeeded) { 62 LOG(ERROR) << "Registering the UpdateEngineAdaptor"; 63 QuitWithExitCode(1); 64 return; 65 } 66 67 // Take ownership of the service now that everything is initialized. We need 68 // to this now and not before to avoid exposing a well known DBus service 69 // path that doesn't have the service it is supposed to implement. 70 if (!dbus_adaptor_->RequestOwnership()) { 71 LOG(ERROR) << "Unable to take ownership of the DBus service, is there " 72 << "other update_engine daemon running?"; 73 QuitWithExitCode(1); 74 return; 75 } 76 SystemState::Get()->update_attempter()->StartUpdater(); 77 } 78 79 } // namespace chromeos_update_engine 80