int main(int argc, char** argv) {
    if (!strcmp(basename(argv[0]), "ueventd")) {
        return ueventd_main(argc, argv);
    }

    if (!strcmp(basename(argv[0]), "watchdogd")) {
        return watchdogd_main(argc, argv);
    }

    // Clear the umask.
    umask(0);

    add_environment("PATH", _PATH_DEFPATH);

    bool is_first_stage = (argc == 1) || (strcmp(argv[1], "--second-stage") != 0);

    // Get the basic filesystem setup we need put together in the initramdisk
    // on / and then we'll let the rc file figure out the rest.
    // 这里是挂载上文件系统
    if (is_first_stage) {
        mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755");
        mkdir("/dev/pts", 0755);
        mkdir("/dev/socket", 0755);
        mount("devpts", "/dev/pts", "devpts", 0, NULL);
        #define MAKE_STR(x) __STRING(x)
        mount("proc", "/proc", "proc", 0, "hidepid=2,gid=" MAKE_STR(AID_READPROC));
        mount("sysfs", "/sys", "sysfs", 0, NULL);
    }

    // We must have some place other than / to create the device nodes for
    // kmsg and null, otherwise we won't be able to remount / read-only
    // later on. Now that tmpfs is mounted on /dev, we can actually talk
    // to the outside world.
    open_devnull_stdio();
    klog_init();
    klog_set_level(KLOG_NOTICE_LEVEL);

    NOTICE("init %s started!\n", is_first_stage ? "first stage" : "second stage");

    if (!is_first_stage) {
        // Indicate that booting is in progress to background fw loaders, etc.
        close(open("/dev/.booting", O_WRONLY | O_CREAT | O_CLOEXEC, 0000));
		// 初始化属性
        property_init();

        // If arguments are passed both on the command line and in DT,
        // properties set in DT always have priority over the command-line ones.
        process_kernel_dt();
        process_kernel_cmdline();

        // Propagate the kernel variables to internal variables
        // used by init as well as the current required properties.
        export_kernel_boot_props();
    }
	
    // Set up SELinux, including loading the SELinux policy if we're in the kernel domain.
    selinux_initialize(is_first_stage);

    // If we're in the kernel domain, re-exec init to transition to the init domain now
    // that the SELinux policy has been loaded.
    if (is_first_stage) {
        if (restorecon("/init") == -1) {
            ERROR("restorecon failed: %s\n", strerror(errno));
            security_failure();
        }
        char* path = argv[0];
        char* args[] = { path, const_cast<char*>("--second-stage"), nullptr };
        if (execv(path, args) == -1) {
            ERROR("execv(\"%s\") failed: %s\n", path, strerror(errno));
            security_failure();
        }
    }

    // These directories were necessarily created before initial policy load
    // and therefore need their security context restored to the proper value.
    // This must happen before /dev is populated by ueventd.
    NOTICE("Running restorecon...\n");
    restorecon("/dev");
    restorecon("/dev/socket");
    restorecon("/dev/__properties__");
    restorecon("/property_contexts");
    restorecon_recursive("/sys");

    epoll_fd = epoll_create1(EPOLL_CLOEXEC);
    if (epoll_fd == -1) {
        ERROR("epoll_create1 failed: %s\n", strerror(errno));
        exit(1);
    }

    signal_handler_init();

    property_load_boot_defaults();
    export_oem_lock_status();
    start_property_service();

    const BuiltinFunctionMap function_map;
    Action::set_function_map(&function_map);
	//在这里建立一个parser对象 开始解析init.rc
    Parser& parser = Parser::GetInstance();
    parser.AddSectionParser("service",std::make_unique<ServiceParser>());
    parser.AddSectionParser("on", std::make_unique<ActionParser>());
    parser.AddSectionParser("import", std::make_unique<ImportParser>());
    parser.ParseConfig("/init.rc");

    ActionManager& am = ActionManager::GetInstance();

    am.QueueEventTrigger("early-init");

    // Queue an action that waits for coldboot done so we know ueventd has set up all of /dev...
    am.QueueBuiltinAction(wait_for_coldboot_done_action, "wait_for_coldboot_done");
    // ... so that we can start queuing up actions that require stuff from /dev.
    am.QueueBuiltinAction(mix_hwrng_into_linux_rng_action, "mix_hwrng_into_linux_rng");
    am.QueueBuiltinAction(set_mmap_rnd_bits_action, "set_mmap_rnd_bits");
    am.QueueBuiltinAction(keychord_init_action, "keychord_init");
    am.QueueBuiltinAction(console_init_action, "console_init");

    // Trigger all the boot actions to get us started.
    am.QueueEventTrigger("init");

    // Repeat mix_hwrng_into_linux_rng in case /dev/hw_random or /dev/random
    // wasn't ready immediately after wait_for_coldboot_done
    am.QueueBuiltinAction(mix_hwrng_into_linux_rng_action, "mix_hwrng_into_linux_rng");

    // Don't mount filesystems or start core system services in charger mode.
    std::string bootmode = property_get("ro.bootmode");
    if (bootmode == "charger") {
        am.QueueEventTrigger("charger");
    } else {
        am.QueueEventTrigger("late-init");
    }

    // Run all property triggers based on current state of the properties.
    am.QueueBuiltinAction(queue_property_triggers_action, "queue_property_triggers");

    while (true) {
        if (!waiting_for_exec) {
            am.ExecuteOneCommand();
            restart_processes();
        }

        int timeout = -1;
        if (process_needs_restart) {
            timeout = (process_needs_restart - gettime()) * 1000;
            if (timeout < 0)
                timeout = 0;
        }

        if (am.HasMoreCommands()) {
            timeout = 0;
        }

        bootchart_sample(&timeout);

        epoll_event ev;
        int nr = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd, &ev, 1, timeout));
        if (nr == -1) {
            ERROR("epoll_wait failed: %s\n", strerror(errno));
        } else if (nr == 1) {
            ((void (*)()) ev.data.ptr)();
        }
    }

    return 0;
}

    Parser& parser = Parser::GetInstance();
    parser.AddSectionParser("service",std::make_unique<ServiceParser>());
    parser.AddSectionParser("on", std::make_unique<ActionParser>());
    parser.AddSectionParser("import", std::make_unique<ImportParser>());
    parser.ParseConfig("/init.rc");

void Parser::AddSectionParser(const std::string& name,
                              std::unique_ptr<SectionParser> parser) {
    section_parsers_[name] = std::move(parser);
}

bool Parser::ParseConfig(const std::string& path) {
    if (is_dir(path.c_str())) {
        return ParseConfigDir(path);
    }
    return ParseConfigFile(path);
}


bool Parser::ParseConfigDir(const std::string& path) {
    INFO("Parsing directory %s...\n", path.c_str());
    std::unique_ptr<DIR, int(*)(DIR*)> config_dir(opendir(path.c_str()), closedir);
    if (!config_dir) {
        ERROR("Could not import directory '%s'\n", path.c_str());
        return false;
    }
    dirent* current_file;
    while ((current_file = readdir(config_dir.get()))) {
        std::string current_path =
            android::base::StringPrintf("%s/%s", path.c_str(), current_file->d_name);
        // Ignore directories and only process regular files.
        if (current_file->d_type == DT_REG) {
            if (!ParseConfigFile(current_path)) {
                ERROR("could not import file '%s'\n", current_path.c_str());
            }
        }
    }
    return true;
}

bool Parser::ParseConfigFile(const std::string& path) {
    INFO("Parsing file %s...\n", path.c_str());
    Timer t;
    std::string data;
    if (!read_file(path.c_str(), &data)) {
        return false;
    }

    data.push_back('\n'); // TODO: fix parse_config.
    ParseData(path, data);
    for (const auto& sp : section_parsers_) {
        sp.second->EndFile(path);
    }

    // Turning this on and letting the INFO logging be discarded adds 0.2s to
    // Nexus 9 boot time, so it's disabled by default.
    if (false) DumpState();

    NOTICE("(Parsing %s took %.2fs.)\n", path.c_str(), t.duration());
    return true;
}

void Parser::ParseData(const std::string& filename, const std::string& data) {
    //TODO: Use a parser with const input and remove this copy
    //将 rc 中的内容保存在 vector 中便于逐个字符进行解析
    std::vector<char> data_copy(data.begin(), data.end());
    data_copy.push_back('\0');

    parse_state state;
    state.filename = filename.c_str();
    state.line = 0;
    state.ptr = &data_copy[0];
    state.nexttoken = 0;

    SectionParser* section_parser = nullptr;
    //存放每一行的内容
    std::vector<std::string> args;

    for (;;) {
        switch (next_token(&state)) {
        case T_EOF:
            if (section_parser) {
                section_parser->EndSection();
            }
            return;
        case T_NEWLINE:
            state.line++;
            //某行为空 则不进行解析
            if (args.empty()) {
                break;
            }
            // 通过判断args[0]的内容是不是services on import来判断是否是section的起始位置
            if (section_parsers_.count(args[0])) {
                if (section_parser) {
                    //结束解析
                    section_parser->EndSection();
                }
                //取出对应的解释器
                section_parser = section_parsers_[args[0]].get();
                std::string ret_err;
                //进行解析了
                if (!section_parser->ParseSection(args, &ret_err)) {
                    parse_error(&state, "%s\n", ret_err.c_str());
                    section_parser = nullptr;
                }
            } else if (section_parser) {
                //不是section起始位置的话，这行就属于是section子块，进行line解析
                std::string ret_err;
                if (!section_parser->ParseLineSection(args, state.filename,
                                                      state.line, &ret_err)) {
                    parse_error(&state, "%s\n", ret_err.c_str());
                }
            }
            args.clear();
            break;
        case T_TEXT:
            args.emplace_back(state.text);
            break;
        }
    }
}

bool ActionParser::ParseSection(const std::vector<std::string>& args,
                                std::string* err) {
    std::vector<std::string> triggers(args.begin() + 1, args.end());
    if (triggers.size() < 1) {
        *err = "actions must have a trigger";
        return false;
    }

    auto action = std::make_unique<Action>(false);
    if (!action->InitTriggers(triggers, err)) {
        return false;
    }

    action_ = std::move(action);
    return true;
}

bool ActionParser::ParseLineSection(const std::vector<std::string>& args,
                                    const std::string& filename, int line,
                                    std::string* err) const {
    return action_ ? action_->AddCommand(args, filename, line, err) : false;
}
调用下面这个AddCommand
bool Action::AddCommand(const std::vector<std::string>& args,
                        const std::string& filename, int line, std::string* err) {
    if (!function_map_) {
        *err = "no function map available";
        return false;
    }

    if (args.empty()) {
        *err = "command needed, but not provided";
        return false;
    }
//这里提及了一个function_map_ 很重要
    auto function = function_map_->FindFunction(args[0], args.size() - 1, err);
    if (!function) {
        return false;
    }

    AddCommand(function, args, filename, line);
    return true;
}
在调用下面这个AddCommand
void Action::AddCommand(BuiltinFunction f,
                        const std::vector<std::string>& args,
                        const std::string& filename, int line) {
    commands_.emplace_back(f, args, filename, line);
}

static const KeywordMap<BuiltinFunction>* function_map_;

static void set_function_map(const KeywordMap<BuiltinFunction>* function_map) {
    function_map_ = function_map;
}

    const BuiltinFunctionMap function_map;
    Action::set_function_map(&function_map);

BuiltinFunctionMap::Map& BuiltinFunctionMap::map() const {
    constexpr std::size_t kMax = std::numeric_limits<std::size_t>::max();
    static const Map builtin_functions = {
        {"bootchart_init",          {0,     0,    do_bootchart_init}},
        {"chmod",                   {2,     2,    do_chmod}},
        {"chown",                   {2,     3,    do_chown}},
        {"class_reset",             {1,     1,    do_class_reset}},
        {"class_start",             {1,     1,    do_class_start}},
        {"class_stop",              {1,     1,    do_class_stop}},
        {"copy",                    {2,     2,    do_copy}},
        {"domainname",              {1,     1,    do_domainname}},
        {"enable",                  {1,     1,    do_enable}},
        {"exec",                    {1,     kMax, do_exec}},
        {"export",                  {2,     2,    do_export}},
        {"hostname",                {1,     1,    do_hostname}},
        {"ifup",                    {1,     1,    do_ifup}},
        {"init_user0",              {0,     0,    do_init_user0}},
        {"insmod",                  {1,     kMax, do_insmod}},
        {"installkey",              {1,     1,    do_installkey}},
        {"load_persist_props",      {0,     0,    do_load_persist_props}},
        {"load_system_props",       {0,     0,    do_load_system_props}},
        {"loglevel",                {1,     1,    do_loglevel}},
        {"mkdir",                   {1,     4,    do_mkdir}},
        {"mount_all",               {1,     kMax, do_mount_all}},
        {"mount",                   {3,     kMax, do_mount}},
        {"powerctl",                {1,     1,    do_powerctl}},
        {"restart",                 {1,     1,    do_restart}},
        {"restorecon",              {1,     kMax, do_restorecon}},
        {"restorecon_recursive",    {1,     kMax, do_restorecon_recursive}},
        {"rm",                      {1,     1,    do_rm}},
        {"rmdir",                   {1,     1,    do_rmdir}},
        {"setprop",                 {2,     2,    do_setprop}},
        {"setrlimit",               {3,     3,    do_setrlimit}},
        {"start",                   {1,     1,    do_start}},
        {"stop",                    {1,     1,    do_stop}},
        {"swapon_all",              {1,     1,    do_swapon_all}},
        {"symlink",                 {2,     2,    do_symlink}},
        {"sysclktz",                {1,     1,    do_sysclktz}},
        {"trigger",                 {1,     1,    do_trigger}},
        {"verity_load_state",       {0,     0,    do_verity_load_state}},
        {"verity_update_state",     {0,     0,    do_verity_update_state}},
        {"wait",                    {1,     2,    do_wait}},
        {"write",                   {2,     2,    do_write}},
    };
    return builtin_functions;
}

void ActionParser::EndSection() {
    if (action_ && action_->NumCommands() > 0) {
        ActionManager::GetInstance().AddAction(std::move(action_));
    }
}

void ActionManager::AddAction(std::unique_ptr<Action> action) {
    ...

    if (old_action_it != actions_.end()) {
        (*old_action_it)->CombineAction(*action);
    } else {
      //将解析之后的 action 对象增加到 actions_ 链表中，用于遍历执行。
        actions_.emplace_back(std::move(action));
    }
}

//ActionManager 在 action.h 中的定义
class ActionManager {
public:
    static ActionManager& GetInstance();

    void AddAction(std::unique_ptr<Action> action);
    void QueueEventTrigger(const std::string& trigger);
    void QueuePropertyTrigger(const std::string& name, const std::string& value);
    void QueueAllPropertyTriggers();
    void QueueBuiltinAction(BuiltinFunction func, const std::string& name);
    void ExecuteOneCommand();
    bool HasMoreCommands() const;
    void DumpState() const;

private:
    ActionManager();

    ActionManager(ActionManager const&) = delete;
    void operator=(ActionManager const&) = delete;

    std::vector<std::unique_ptr<Action>> actions_; //actions_ 的定义
    std::queue<std::unique_ptr<Trigger>> trigger_queue_;
    std::queue<const Action*> current_executing_actions_;
    std::size_t current_command_;
};

bool ServiceParser::ParseSection(const std::vector<std::string>& args,
                                 std::string* err) {
    ...
  //获取服务名
    const std::string& name = args[1];
    ...
  //保存服务名外的参数（如执行路径等）
    std::vector<std::string> str_args(args.begin() + 2, args.end());
  //将 service_ 指针指向当前 Service 对象
    service_ = std::make_unique<Service>(name, "default", str_args);
    return true;
}

bool ServiceParser::ParseLineSection(const std::vector<std::string>& args,
                                     const std::string& filename, int line,
                                     std::string* err) const {
  //为 Service 中的每一个 Option 指定处理函数
    return service_ ? service_->HandleLine(args, err) : false;
}

bool Service::HandleLine(const std::vector<std::string>& args, std::string* err) {
    ...

    static const OptionHandlerMap handler_map;
  //寻找对应 option 的处理函数
    auto handler = handler_map.FindFunction(args[0], args.size() - 1, err);

    ...

    return (this->*handler)(args, err);
}

void ServiceParser::EndSection() {
    if (service_) {
        ServiceManager::GetInstance().AddService(std::move(service_));
    }
}

void ServiceManager::AddService(std::unique_ptr<Service> service) {
    Service* old_service = FindServiceByName(service->name());
    if (old_service) {
        ERROR("ignored duplicate definition of service '%s'",
              service->name().c_str());
        return;
    }
  //将解析之后 service 对象增加到 services_ 链表中
    services_.emplace_back(std::move(service));
}

//ServiceManager 在 service.h 中的定义
class ServiceManager {
public:
    static ServiceManager& GetInstance();

    void AddService(std::unique_ptr<Service> service);
    Service* MakeExecOneshotService(const std::vector<std::string>& args);
    Service* FindServiceByName(const std::string& name) const;
    Service* FindServiceByPid(pid_t pid) const;
    Service* FindServiceByKeychord(int keychord_id) const;
    void ForEachService(std::function<void(Service*)> callback) const;
    void ForEachServiceInClass(const std::string& classname,
                               void (*func)(Service* svc)) const;
    void ForEachServiceWithFlags(unsigned matchflags,
                             void (*func)(Service* svc)) const;
    void ReapAnyOutstandingChildren();
    void RemoveService(const Service& svc);
    void DumpState() const;

private:
    ServiceManager();
    bool ReapOneProcess();
    static int exec_count_; // Every service needs a unique name.
    std::vector<std::unique_ptr<Service>> services_; //services_ 的定义
};

while (true) {
        if (!waiting_for_exec) {
            am.ExecuteOneCommand();
            restart_processes();
        }

        int timeout = -1;
        if (process_needs_restart) {
            timeout = (process_needs_restart - gettime()) * 1000;
            if (timeout < 0)
                timeout = 0;
        }

        if (am.HasMoreCommands()) {
            timeout = 0;
        }

        bootchart_sample(&timeout);

        epoll_event ev;
        int nr = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd, &ev, 1, timeout));
        if (nr == -1) {
            ERROR("epoll_wait failed: %s\n", strerror(errno));
        } else if (nr == 1) {
            ((void (*)()) ev.data.ptr)();
        }
    }

void ActionManager::ExecuteOneCommand() {
    while (current_executing_actions_.empty() && !trigger_queue_.empty()) {
        //遍历 actions_
        for (const auto& action : actions_) {
            if (trigger_queue_.front()->CheckTriggers(*action)) {
                //将 action 加入到 current_executing_actions_ 中
                current_executing_actions_.emplace(action.get());
            }
        }
        trigger_queue_.pop();
    }

    ...

    //每次只执行一个 action，下次 init 进程 while 循环时，跳过上面的 while 循环，接着执行
    auto action = current_executing_actions_.front();

    if (current_command_ == 0) {
        std::string trigger_name = action->BuildTriggersString();
        INFO("processing action (%s)\n", trigger_name.c_str());
    }

    //执行 action 的 command
    action->ExecuteOneCommand(current_command_);

    ++current_command_;
    ...
}

void Action::ExecuteOneCommand(std::size_t command) const {
  //执行 action 对象中保存的 command
    ExecuteCommand(commands_[command]);
}

void Action::ExecuteCommand(const Command& command) const {
    Timer t;
  //调用 command 对应的处理函数
    int result = command.InvokeFunc();

    ...
}

static int do_class_start(const std::vector<std::string>& args) {
    ServiceManager::GetInstance().
        ForEachServiceInClass(args[1], [] (Service* s) { s->StartIfNotDisabled(); });
    return 0;
}

bool Service::StartIfNotDisabled() {
    if (!(flags_ & SVC_DISABLED)) {
        return Start();
    } else {
        flags_ |= SVC_DISABLED_START;
    }
    return true;
}

bool Service::Start() {
    ....
   //创建子进程
    pid_t pid = fork();
    if (pid == 0) {
        ...
       //执行对应 service 对应的执行文件，args_[0].c_str() 就是执行路径
        if (execve(args_[0].c_str(), (char**) &strs[0], (char**) ENV) < 0) {
            ERROR("cannot execve('%s'): %s\n", args_[0].c_str(), strerror(errno));
        }

        _exit(127);
    }

    ....
    return true;
}

int main(int argc, char* const argv[])
{
    if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) {
        // Older kernels don't understand PR_SET_NO_NEW_PRIVS and return
        // EINVAL. Don't die on such kernels.
        if (errno != EINVAL) {
            LOG_ALWAYS_FATAL("PR_SET_NO_NEW_PRIVS failed: %s", strerror(errno));
            return 12;
        }
    }
创建app运行时对象
    AppRuntime runtime(argv[0], computeArgBlockSize(argc, argv));
    // Process command line arguments
    // ignore argv[0]
    argc--;
    argv++;

    // Everything up to '--' or first non '-' arg goes to the vm.
    //
    // The first argument after the VM args is the "parent dir", which
    // is currently unused.
    //
    // After the parent dir, we expect one or more the following internal
    // arguments :
    //
    // --zygote : Start in zygote mode
    // --start-system-server : Start the system server.
    // --application : Start in application (stand alone, non zygote) mode.
    // --nice-name : The nice name for this process.
    //
    // For non zygote starts, these arguments will be followed by
    // the main class name. All remaining arguments are passed to
    // the main method of this class.
    //
    // For zygote starts, all remaining arguments are passed to the zygote.
    // main function.
    //
    // Note that we must copy argument string values since we will rewrite the
    // entire argument block when we apply the nice name to argv0.

    int i;
    for (i = 0; i < argc; i++) {
        if (argv[i][0] != '-') {
            break;
        }
        if (argv[i][1] == '-' && argv[i][2] == 0) {
            ++i; // Skip --.
            break;
        }
        runtime.addOption(strdup(argv[i]));
    }

    // Parse runtime arguments.  Stop at first unrecognized option.
    bool zygote = false;
    bool startSystemServer = false;
    bool application = false;
    String8 niceName;
    String8 className;
关键代码1
    ++i;  // Skip unused "parent dir" argument.
    while (i < argc) {
        const char* arg = argv[i++];
        if (strcmp(arg, "--zygote") == 0) {
            zygote = true;
            niceName = ZYGOTE_NICE_NAME;
        } else if (strcmp(arg, "--start-system-server") == 0) {
            startSystemServer = true;
        } else if (strcmp(arg, "--application") == 0) {
            application = true;
        } else if (strncmp(arg, "--nice-name=", 12) == 0) {
            niceName.setTo(arg + 12);
        } else if (strncmp(arg, "--", 2) != 0) {
            className.setTo(arg);
            break;
        } else {
            --i;
            break;
        }
    }

    Vector<String8> args;
    if (!className.isEmpty()) {
        // We're not in zygote mode, the only argument we need to pass
        // to RuntimeInit is the application argument.
        //
        // The Remainder of args get passed to startup class main(). Make
        // copies of them before we overwrite them with the process name.
        args.add(application ? String8("application") : String8("tool"));
        runtime.setClassNameAndArgs(className, argc - i, argv + i);
    } else {
        // We're in zygote mode.
        maybeCreateDalvikCache();

        if (startSystemServer) {
            args.add(String8("start-system-server"));
        }

        char prop[PROP_VALUE_MAX];
        if (property_get(ABI_LIST_PROPERTY, prop, NULL) == 0) {
            LOG_ALWAYS_FATAL("app_process: Unable to determine ABI list from property %s.",
                ABI_LIST_PROPERTY);
            return 11;
        }

        String8 abiFlag("--abi-list=");
        abiFlag.append(prop);
        args.add(abiFlag);

        // In zygote mode, pass all remaining arguments to the zygote
        // main() method.
        for (; i < argc; ++i) {
            args.add(String8(argv[i]));
        }
    }

    if (!niceName.isEmpty()) {
        runtime.setArgv0(niceName.string());
        set_process_name(niceName.string());
    }
关键代码2
    if (zygote) {
        runtime.start("com.android.internal.os.ZygoteInit", args, zygote);
    } else if (className) {
        runtime.start("com.android.internal.os.RuntimeInit", args, zygote);
    } else {
        fprintf(stderr, "Error: no class name or --zygote supplied.\n");
        app_usage();
        LOG_ALWAYS_FATAL("app_process: no class name or --zygote supplied.");
        return 10;
    }
}

关键代码1
    ++i;  // Skip unused "parent dir" argument.
    while (i < argc) {
        const char* arg = argv[i++];
        if (strcmp(arg, "--zygote") == 0) {
            zygote = true;
            niceName = ZYGOTE_NICE_NAME;
        } else if (strcmp(arg, "--start-system-server") == 0) {
            startSystemServer = true;
        } else if (strcmp(arg, "--application") == 0) {
            application = true;
        } else if (strncmp(arg, "--nice-name=", 12) == 0) {
            niceName.setTo(arg + 12);
        } else if (strncmp(arg, "--", 2) != 0) {
            className.setTo(arg);
            break;
        } else {
            --i;
            break;
        }
    }

if (zygote) {
        runtime.start("com.android.internal.os.ZygoteInit", args, zygote);
    } else if (className) {
        runtime.start("com.android.internal.os.RuntimeInit", args, zygote);
    } else {
        fprintf(stderr, "Error: no class name or --zygote supplied.\n");
        app_usage();
        LOG_ALWAYS_FATAL("app_process: no class name or --zygote supplied.");
        return 10;
    }