网站机房建设有助于,4p 4c 4r营销理论区别,传奇三端互通新开服网站,免费网络节点Android framework服务命令行工具框架 - Android13 1、framework服务命令行工具简介2、cmd 执行程序2.1 目录和Android.bp2.2 cmdMain 执行入口2.3 cmd命令 3、am命令工具#xff0c;实质脚本执行cmd activity3.1 sh脚本3.2 activity服务注册3.3 onShellCommand执行 4、简易时… Android framework服务命令行工具框架 - Android13 1、framework服务命令行工具简介2、cmd 执行程序2.1 目录和Android.bp2.2 cmdMain 执行入口2.3 cmd命令 3、am命令工具实质脚本执行cmd activity3.1 sh脚本3.2 activity服务注册3.3 onShellCommand执行 4、简易时序图 1、framework服务命令行工具简介 这里强调 “framework服务” 主要就是bin命令模拟 framework服务 相关的查询和功能如am\pm\input等其实质就是 Android 提供了大多数常见的 Unix 命令行工具说白了就是bin执行程序 。而 framework服务 命令行工具现在一般就是cmdbin执行程序Binder获取对应服务通过IBinder::shellCommand调用对应服务的onShellCommand。 2、cmd 执行程序
2.1 目录和Android.bp
frameworks/native/cmds/cmd/Android.bp frameworks/native/cmds/cmd/cmd.cpp
2.2 cmdMain 执行入口
DEBUG默认关闭#define DEBUG 0serviceNameSM中注册的binder服务对应的名称如ACTIVITY_SERVICE activityActivityManagerServiceIBinder::shellCommand(service, in, out, err, args, cb, result)执行到对应服务onShellCommand
frameworks/native/cmds/cmd/cmd.cpp
int cmdMain(const std::vectorstd::string_view argv, TextOutput outputLog, TextOutput errorLog,int in, int out, int err, RunMode runMode) {spProcessState proc ProcessState::self();proc-startThreadPool();#if DEBUGALOGD(cmd: starting);
#endifspIServiceManager sm defaultServiceManager();if (runMode RunMode::kStandalone) {fflush(stdout);}if (sm nullptr) {ALOGW(Unable to get default service manager!);errorLog cmd: Unable to get default service manager! endl;return 20;}int argc argv.size();if (argc 0) {errorLog cmd: No service specified; use -l to list all running services. Use -w to start and wait for a service. endl;return 20;}if ((argc 1) (argv[0] -l)) {VectorString16 services sm-listServices();services.sort(sort_func);outputLog Currently running services: endl;for (size_t i0; iservices.size(); i) {spIBinder service sm-checkService(services[i]);if (service ! nullptr) {outputLog services[i] endl;}}return 0;}bool waitForService ((argc 1) (argv[0] -w));int serviceIdx (waitForService) ? 1 : 0;const auto cmd argv[serviceIdx];VectorString16 args;String16 serviceName String16(cmd.data(), cmd.size());for (int i serviceIdx 1; i argc; i) {args.add(String16(argv[i].data(), argv[i].size()));}spIBinder service;if(waitForService) {service sm-waitForService(serviceName);} else {service sm-checkService(serviceName);}if (service nullptr) {if (runMode RunMode::kStandalone) {ALOGW(Cant find service %.*s, static_castint(cmd.size()), cmd.data());}errorLog cmd: Cant find service: cmd endl;return 20;}spMyShellCallback cb new MyShellCallback(errorLog);spMyResultReceiver result new MyResultReceiver();#if DEBUGALOGD(cmd: Invoking %.*s in%d, out%d, err%d,static_castint(cmd.size()), cmd.data(), in, out, err);
#endif// TODO: block until a result is returned to MyResultReceiver.status_t error IBinder::shellCommand(service, in, out, err, args, cb, result);if (error 0) {const char* errstr;switch (error) {case BAD_TYPE: errstr Bad type; break;case FAILED_TRANSACTION: errstr Failed transaction; break;case FDS_NOT_ALLOWED: errstr File descriptors not allowed; break;case UNEXPECTED_NULL: errstr Unexpected null; break;default: errstr strerror(-error); break;}if (runMode RunMode::kStandalone) {ALOGW(Failure calling service %.*s: %s (%d), static_castint(cmd.size()), cmd.data(),errstr, -error);}outputLog cmd: Failure calling service cmd : errstr ( (-error) ) endl;return error;}cb-mActive false;status_t res result-waitForResult();
#if DEBUGALOGD(result%d, (int)res);
#endifreturn res;
}2.3 cmd命令 cmd cmd -l 列出SM中注册的服务 cmd activity
3、am命令工具实质脚本执行cmd activity
3.1 sh脚本 这里am工具为例。Android 提供了大多数常见的 Unix 命令行工具查看可用工具的列表adb shell ls /system/bin frameworks/base/cmds/am/am
#!/system/bin/shif [ $1 ! instrument ] ; thencmd activity $
elsebase/systemexport CLASSPATH$base/framework/am.jarexec app_process $base/bin com.android.commands.am.Am $
fi3.2 activity服务注册 activity服务就是ActivityManagerService注册的Context.ACTIVITY_SERVICE frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java
public void setSystemProcess() {try {ServiceManager.addService(Context.ACTIVITY_SERVICE, this, /* allowIsolated */ true,DUMP_FLAG_PRIORITY_CRITICAL | DUMP_FLAG_PRIORITY_NORMAL | DUMP_FLAG_PROTO);ServiceManager.addService(ProcessStats.SERVICE_NAME, mProcessStats);ServiceManager.addService(meminfo, new MemBinder(this), /* allowIsolated */ false,DUMP_FLAG_PRIORITY_HIGH);ServiceManager.addService(gfxinfo, new GraphicsBinder(this));ServiceManager.addService(dbinfo, new DbBinder(this));mAppProfiler.setCpuInfoService();ServiceManager.addService(permission, new PermissionController(this));ServiceManager.addService(processinfo, new ProcessInfoService(this));ServiceManager.addService(cacheinfo, new CacheBinder(this));//... ... ... ...
}3.3 onShellCommand执行 ActivityManagerShellCommand专门处理am相关命令这里具体功能不展开细说。 frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java
Override
public void onShellCommand(FileDescriptor in, FileDescriptor out,FileDescriptor err, String[] args, ShellCallback callback,ResultReceiver resultReceiver) {(new ActivityManagerShellCommand(this, false)).exec(this, in, out, err, args, callback, resultReceiver);
}frameworks/base/services/core/java/com/android/server/am/ActivityManagerShellCommand.java
Override
public int onCommand(String cmd) {if (cmd null) {return handleDefaultCommands(cmd);}final PrintWriter pw getOutPrintWriter();try {switch (cmd) {case start:case start-activity:return runStartActivity(pw);case startservice:case start-service:return runStartService(pw, false);case startforegroundservice:case startfgservice:case start-foreground-service:case start-fg-service:return runStartService(pw, true);case stopservice:case stop-service:return runStopService(pw);case broadcast:return runSendBroadcast(pw);case compact:return runCompact(pw);case instrument:getOutPrintWriter().println(Error: must be invoked through am instrument.);return -1;case trace-ipc:return runTraceIpc(pw);case profile:return runProfile(pw);case dumpheap:return runDumpHeap(pw);case set-debug-app:return runSetDebugApp(pw);case set-agent-app:return runSetAgentApp(pw);case clear-debug-app:return runClearDebugApp(pw);case set-watch-heap:return runSetWatchHeap(pw);case clear-watch-heap:return runClearWatchHeap(pw);case clear-exit-info:return runClearExitInfo(pw);case bug-report:return runBugReport(pw);case force-stop:return runForceStop(pw);case stop-app:return runStopApp(pw);case fgs-notification-rate-limit:return runFgsNotificationRateLimit(pw);case crash:return runCrash(pw);case kill:return runKill(pw);case kill-all:return runKillAll(pw);case make-uid-idle:return runMakeIdle(pw);case monitor:return runMonitor(pw);case watch-uids:return runWatchUids(pw);case hang:return runHang(pw);case restart:return runRestart(pw);case idle-maintenance:return runIdleMaintenance(pw);case screen-compat:return runScreenCompat(pw);case package-importance:return runPackageImportance(pw);case to-uri:return runToUri(pw, 0);case to-intent-uri:return runToUri(pw, Intent.URI_INTENT_SCHEME);case to-app-uri:return runToUri(pw, Intent.URI_ANDROID_APP_SCHEME);case switch-user:return runSwitchUser(pw);case get-current-user:return runGetCurrentUser(pw);case start-user:return runStartUser(pw);case unlock-user:return runUnlockUser(pw);case stop-user:return runStopUser(pw);case is-user-stopped:return runIsUserStopped(pw);case get-started-user-state:return runGetStartedUserState(pw);case track-associations:return runTrackAssociations(pw);case untrack-associations:return runUntrackAssociations(pw);case get-uid-state:return getUidState(pw);case get-config:return runGetConfig(pw);case suppress-resize-config-changes:return runSuppressResizeConfigChanges(pw);case set-inactive:return runSetInactive(pw);case get-inactive:return runGetInactive(pw);case set-standby-bucket:return runSetStandbyBucket(pw);case get-standby-bucket:return runGetStandbyBucket(pw);case send-trim-memory:return runSendTrimMemory(pw);case display:return runDisplay(pw);case stack:return runStack(pw);case task:return runTask(pw);case write:return runWrite(pw);case attach-agent:return runAttachAgent(pw);case supports-multiwindow:return runSupportsMultiwindow(pw);case supports-split-screen-multi-window:return runSupportsSplitScreenMultiwindow(pw);case update-appinfo:return runUpdateApplicationInfo(pw);case no-home-screen:return runNoHomeScreen(pw);case wait-for-broadcast-idle:return runWaitForBroadcastIdle(pw);case compat:return runCompat(pw);case refresh-settings-cache:return runRefreshSettingsCache();case memory-factor:return runMemoryFactor(pw);case service-restart-backoff:return runServiceRestartBackoff(pw);case get-isolated-pids:return runGetIsolatedProcesses(pw);case set-stop-user-on-switch:return runSetStopUserOnSwitch(pw);case set-bg-abusive-uids:return runSetBgAbusiveUids(pw);case list-bg-exemptions-config:return runListBgExemptionsConfig(pw);default:return handleDefaultCommands(cmd);}} catch (RemoteException e) {pw.println(Remote exception: e);}return -1;
}4、简易时序图
