1 // 2 // Copyright (C) 2016 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 <sysexits.h> 18 #include <unistd.h> 19 20 #include <string> 21 #include <vector> 22 23 #include <base/bind.h> 24 #include <base/callback.h> 25 #include <base/command_line.h> 26 #include <base/logging.h> 27 #include <base/strings/string_split.h> 28 #include <binder/IServiceManager.h> 29 #include <binderwrapper/binder_wrapper.h> 30 #include <brillo/binder_watcher.h> 31 #include <brillo/daemons/daemon.h> 32 #include <brillo/flag_helper.h> 33 #include <brillo/message_loops/message_loop.h> 34 #include <brillo/syslog_logging.h> 35 #include <utils/String16.h> 36 #include <utils/StrongPointer.h> 37 38 #include "android/os/BnUpdateEngineCallback.h" 39 #include "android/os/IUpdateEngine.h" 40 #include "update_engine/client_library/include/update_engine/update_status.h" 41 #include "update_engine/common/error_code.h" 42 #include "update_engine/common/error_code_utils.h" 43 #include "update_engine/update_status_utils.h" 44 45 using android::binder::Status; 46 47 namespace chromeos_update_engine { 48 namespace internal { 49 50 class UpdateEngineClientAndroid : public brillo::Daemon { 51 public: 52 UpdateEngineClientAndroid(int argc, char** argv) : argc_(argc), argv_(argv) { 53 } 54 55 int ExitWhenIdle(const Status& status); 56 int ExitWhenIdle(int return_code); 57 58 private: 59 class UECallback : public android::os::BnUpdateEngineCallback { 60 public: 61 explicit UECallback(UpdateEngineClientAndroid* client) : client_(client) {} 62 63 // android::os::BnUpdateEngineCallback overrides. 64 Status onStatusUpdate(int status_code, float progress) override; 65 Status onPayloadApplicationComplete(int error_code) override; 66 67 private: 68 UpdateEngineClientAndroid* client_; 69 }; 70 71 int OnInit() override; 72 73 // Called whenever the UpdateEngine daemon dies. 74 void UpdateEngineServiceDied(); 75 76 // Copy of argc and argv passed to main(). 77 int argc_; 78 char** argv_; 79 80 android::sp<android::os::IUpdateEngine> service_; 81 android::sp<android::os::BnUpdateEngineCallback> callback_; 82 83 brillo::BinderWatcher binder_watcher_; 84 }; 85 86 Status UpdateEngineClientAndroid::UECallback::onStatusUpdate( 87 int status_code, float progress) { 88 update_engine::UpdateStatus status = 89 static_cast<update_engine::UpdateStatus>(status_code); 90 LOG(INFO) << "onStatusUpdate(" << UpdateStatusToString(status) << " (" 91 << status_code << "), " << progress << ")"; 92 return Status::ok(); 93 } 94 95 Status UpdateEngineClientAndroid::UECallback::onPayloadApplicationComplete( 96 int error_code) { 97 ErrorCode code = static_cast<ErrorCode>(error_code); 98 LOG(INFO) << "onPayloadApplicationComplete(" << utils::ErrorCodeToString(code) 99 << " (" << error_code << "))"; 100 client_->ExitWhenIdle(code == ErrorCode::kSuccess ? EX_OK : 1); 101 return Status::ok(); 102 } 103 104 int UpdateEngineClientAndroid::OnInit() { 105 int ret = Daemon::OnInit(); 106 if (ret != EX_OK) 107 return ret; 108 109 DEFINE_bool(update, false, "Start a new update, if no update in progress."); 110 DEFINE_string(payload, 111 "http://127.0.0.1:8080/payload", 112 "The URI to the update payload to use."); 113 DEFINE_int64(offset, 0, 114 "The offset in the payload where the CrAU update starts. " 115 "Used when --update is passed."); 116 DEFINE_int64(size, 0, 117 "The size of the CrAU part of the payload. If 0 is passed, it " 118 "will be autodetected. Used when --update is passed."); 119 DEFINE_string(headers, 120 "", 121 "A list of key-value pairs, one element of the list per line. " 122 "Used when --update is passed."); 123 124 DEFINE_bool(suspend, false, "Suspend an ongoing update and exit."); 125 DEFINE_bool(resume, false, "Resume a suspended update."); 126 DEFINE_bool(cancel, false, "Cancel the ongoing update and exit."); 127 DEFINE_bool(reset_status, false, "Reset an already applied update and exit."); 128 DEFINE_bool(follow, 129 false, 130 "Follow status update changes until a final state is reached. " 131 "Exit status is 0 if the update succeeded, and 1 otherwise."); 132 133 // Boilerplate init commands. 134 base::CommandLine::Init(argc_, argv_); 135 brillo::FlagHelper::Init(argc_, argv_, "Android Update Engine Client"); 136 if (argc_ == 1) { 137 LOG(ERROR) << "Nothing to do. Run with --help for help."; 138 return 1; 139 } 140 141 // Ensure there are no positional arguments. 142 const std::vector<std::string> positional_args = 143 base::CommandLine::ForCurrentProcess()->GetArgs(); 144 if (!positional_args.empty()) { 145 LOG(ERROR) << "Found a positional argument '" << positional_args.front() 146 << "'. If you want to pass a value to a flag, pass it as " 147 "--flag=value."; 148 return 1; 149 } 150 151 bool keep_running = false; 152 brillo::InitLog(brillo::kLogToStderr); 153 154 // Initialize a binder watcher early in the process before any interaction 155 // with the binder driver. 156 binder_watcher_.Init(); 157 158 android::status_t status = android::getService( 159 android::String16("android.os.UpdateEngineService"), &service_); 160 if (status != android::OK) { 161 LOG(ERROR) << "Failed to get IUpdateEngine binder from service manager: " 162 << Status::fromStatusT(status).toString8(); 163 return ExitWhenIdle(1); 164 } 165 166 if (FLAGS_suspend) { 167 return ExitWhenIdle(service_->suspend()); 168 } 169 170 if (FLAGS_resume) { 171 return ExitWhenIdle(service_->resume()); 172 } 173 174 if (FLAGS_cancel) { 175 return ExitWhenIdle(service_->cancel()); 176 } 177 178 if (FLAGS_reset_status) { 179 return ExitWhenIdle(service_->resetStatus()); 180 } 181 182 if (FLAGS_follow) { 183 // Register a callback object with the service. 184 callback_ = new UECallback(this); 185 bool bound; 186 if (!service_->bind(callback_, &bound).isOk() || !bound) { 187 LOG(ERROR) << "Failed to bind() the UpdateEngine daemon."; 188 return 1; 189 } 190 keep_running = true; 191 } 192 193 if (FLAGS_update) { 194 std::vector<std::string> headers = base::SplitString( 195 FLAGS_headers, "\n", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY); 196 std::vector<android::String16> and_headers; 197 for (const auto& header : headers) { 198 and_headers.push_back(android::String16{header.data(), header.size()}); 199 } 200 Status status = service_->applyPayload( 201 android::String16{FLAGS_payload.data(), FLAGS_payload.size()}, 202 FLAGS_offset, 203 FLAGS_size, 204 and_headers); 205 if (!status.isOk()) 206 return ExitWhenIdle(status); 207 } 208 209 if (!keep_running) 210 return ExitWhenIdle(EX_OK); 211 212 // When following updates status changes, exit if the update_engine daemon 213 // dies. 214 android::BinderWrapper::Create(); 215 android::BinderWrapper::Get()->RegisterForDeathNotifications( 216 android::os::IUpdateEngine::asBinder(service_), 217 base::Bind(&UpdateEngineClientAndroid::UpdateEngineServiceDied, 218 base::Unretained(this))); 219 220 return EX_OK; 221 } 222 223 int UpdateEngineClientAndroid::ExitWhenIdle(const Status& status) { 224 if (status.isOk()) 225 return ExitWhenIdle(EX_OK); 226 LOG(ERROR) << status.toString8(); 227 return ExitWhenIdle(status.exceptionCode()); 228 } 229 230 int UpdateEngineClientAndroid::ExitWhenIdle(int return_code) { 231 auto delayed_exit = base::Bind( 232 &Daemon::QuitWithExitCode, base::Unretained(this), return_code); 233 if (!brillo::MessageLoop::current()->PostTask(delayed_exit)) 234 return 1; 235 return EX_OK; 236 } 237 238 void UpdateEngineClientAndroid::UpdateEngineServiceDied() { 239 LOG(ERROR) << "UpdateEngineService died."; 240 QuitWithExitCode(1); 241 } 242 243 } // namespace internal 244 } // namespace chromeos_update_engine 245 246 int main(int argc, char** argv) { 247 chromeos_update_engine::internal::UpdateEngineClientAndroid client( 248 argc, argv); 249 return client.Run(); 250 } 251
