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README
Apache-2.0

启动子系统

简介

init组件负责处理从内核加载第一个用户态进程开始,到第一个应用程序启动之间的系统服务进程启动过程。启动恢复子系统除负责加载各系统关键进程之外,还需在启动的同时设置其对应权限,并在子进程启动后对指定进程实行保活(若进程意外退出要重新启动),对于特殊进程意外退出时,启动恢复子系统还要执行系统复位操作。

系统架构

图 1 OHOS启动框架图

目录

仓目录结构如下:

base/startup/init/
├── device_info         # 提供设备信息的SA服务
├── initsync            # 同步命令(小型系统)
├── interfaces          # 对外接口
├── scripts             # 脚本(LiteOS系统使用)
├── services
│   ├── begetctl        # 命令集合。提供服务的dump,拉起等一系列命令
│   ├── etc             # init配置文件目录(标准系统)
│   ├── etc_lite        # init配置文件目录(小型系统)
│   ├── include         # init头文件目录
│   ├── init            # init核心功能源码
│   │   ├── adapter     # 内核适配层
│   │   ├── include     # 头文件目录
│   │   ├── lite        # init核心功能源码(小型系统)
│   │   └── standard    # init核心功能源码(标准系统)
│   ├── log             # init日志部件。
│   ├── loopevent       # 事件库
│   │   ├── include     # 头文件目录
│   │   ├── loop        # 基于epoll封装的I/O多路复用接口
│   │   ├── signal      # 信号处理接口封装。提供信号的添加,handler注册等功能
│   │   ├── socket      # socket通信接口
│   │   ├── task        # 事件的抽象任务,如signal, timer等事件都要创建对应task
│   │   ├── timer       # 定时器接口
│   │   └── utils       # loopevent通用接口
│   ├── modules         # 插件化模块
│   │   ├── bootchart   # bootchart插件化源码
│   │   ├── bootevent   # bootevent插件化源码
│   │   ├── init_hook   # init提供的回调函数
│   │   ├── reboot      # reboot插件化源码
│   │   ├── seccomp     # seccomp插件化源码
│   │   └── selinux     # selinux插件化源码
│   ├── param           # 系统参数部件
│   └── utils           # init通用接口
├── test                # init组件测试用例源文件目录
├── ueventd             # ueventd服务源码
│   ├── etc             # ueventd配置文件目录
│   ├── include         # ueventd头文件目录
│   ├── lite            # ueventd核心功能源码(小型系统)
│   └── standard        # ueventd核心功能源码(标准系统)
└── watchdog            # 看门狗服务源码

约束

目前支持小型系统设备(参考内存≥1MB),标准系统Hi3516DV300、Hi3518EV300以及RK3568等

说明

详细使用说明参考开发指南:

启动恢复子系统概述

引导启动配置文件

jobs管理

插件

沙盒管理

服务管理

系统参数

日志管理

组件化启动

相关仓

startup_init_lite

startup_appspawn

startup_bootstrap_lite

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