1 Star 0 Fork 838

zhaoguojian/startup_init_lite

forked from OpenHarmony/startup_init 
加入 Gitee
与超过 1200万 开发者一起发现、参与优秀开源项目,私有仓库也完全免费 :)
免费加入
克隆/下载
贡献代码
同步代码
取消
提示: 由于 Git 不支持空文件夾,创建文件夹后会生成空的 .keep 文件
Loading...
README
Apache-2.0

init组件

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。

目录

base/startup/init_lite/             # init组件
├── LICENSE
└── services
    ├── include                  # init组件头文件目录
    ├── src                      # init组件源文件目录
    └── test                     # init组件测试用例源文件目录
        └── unittest
vendor
└──huawei
        └──camera
                └──init_configs  # init配置文件目录(json格式,镜像烧写后部署于/etc/init.cfg)

约束

目前支持小型系统设备(参考内存≥1MB),如Hi3516DV300、Hi3518EV300。

使用说明

init将系统启动分为三个阶段:

“pre-init”阶段:启动系统服务之前需要先执行的操作,例如挂载文件系统、创建文件夹、修改权限等

“init”阶段:系统服务启动阶段

“post-init”阶段:系统服务启动完后还需要执行的操作

上述每个阶段在配置文件init.cfg中都用一个job表示,每个job都对应一个命令集合,init通过依次执行每个job中的命令来完成系统初始化。job执行顺序:先执行“pre-init”,再执行“init”,最后执行“post-init”,所有job都集中放在init.cfg的jobs数组中。

除上述jobs数组之外,init.cfg中还有一个services数组,用于存放所有需要由init进程启动的系统关键服务的服务名、可执行文件路径、权限和其他属性信息。

配置文件init.cfg位于代码仓库/vendor/hisilicon/hispark_aries/init_configs/目录,部署在/etc/下,采用json格式,文件大小目前限制在100KB以内。

配置文件格式和内容说明如下所示:

{
    "jobs" : [{
            "name" : "pre-init",
            "cmds" : [
                "mkdir /testdir",
                "chmod 0700 /testdir",
                "chown 99 99 /testdir",
                "mkdir /testdir2",
                "mount vfat /dev/mmcblk0p0 /testdir2 noexec nosuid"
            ]
        }, {
            "name" : "init",
            "cmds" : [
                "start service1",
                "start service2"
             ]
        }, {
             "name" : "post-init",
             "cmds" : []
        }
    ],
    "services" : [{
            "name" : "service1",
            "path" : "/bin/process1",
            "uid" : 1,
            "gid" : 1,
            "once" : 0,
            "importance" : 1,
            "caps" : [0, 1, 2, 5]
    }, {
            "name" : "service2",
            "path" : "/bin/process2",
            "uid" : 2,
            "gid" : 2,
            "once" : 1,
            "importance" : 0,
            "caps" : []
        }
    ]
}

表 1 执行job介绍

job名

说明

pre-init

最先执行的job,如果开发者的进程在启动之前需要首先执行一些操作(例如创建文件夹),可以把操作放到pre-init中先执行。

init

中间执行的job,例如服务启动。

post-init

最后被执行的job,如果开发者的进程在启动完成之后需要有一些处理(如驱动初始化后再挂载设备),可以把这类操作放到该job执行。

单个job最多支持30条命令(当前仅支持start/mkdir/chmod/chown/mount/loadcfg),命令名称和后面的参数(参数长度≤128字节)之间有且只能有一个空格。

表 2 命令集说明

命令

命令格式和示例

说明

mkdir

mkdir 目标文件夹

如:mkdir /storage/myDirectory

创建文件夹命令,mkdir和目标文件夹之间有且只能有一个空格。

chmod

chmod 权限 目标

如:chmod 0600 /storage/myFile.txt

chmod 0750 /storage/myDir

修改权限命令,chmod 权限 目标 之间间隔有且仅有一个空格,权限必须为0xxx格式。

chown

chown uid gid 目标

如:chown 900 800 /storage/myDir

chown 100 100 /storage/myFile.txt

修改属组命令,chown uid gid 目标 之间间隔有且仅有一个空格。

mount

mount fileSystemType src dst flags data

如:mount vfat /dev/mmcblk0 /sdc rw,umask=000

mount jffs2 /dev/mtdblock3 /storage nosuid

挂载命令,各参数之间有且仅有一个空格。flags当前仅支持nodev、noexec、nosuid、rdonly,data为可选字段。

start

start serviceName

如:start foundation

start shell

启动服务命令,start后面跟着service名称,该service名称必须能够在services数组中找到。

loadcfg

loadcfg filePath

如:loadcfg /patch/fstab.cfg

加载其他cfg文件命令。后面跟着的目标文件大小不得超过50KB,且目前仅支持加载/patch/fstab.cfg,其他文件路径和文件名均不支持。/patch/fstab.cfg文件的每一行都是一条命令,命令类型和格式必须符合本表格描述,命令条数不得超过20条。

表 3 service字段说明

字段名

说明

name

当前服务的名称,须确保非空且长度≤32字节。

path

当前服务的可执行文件全路径和参数,数组形式。须确保第一个数组元素为可执行文件路径、数组元素个数≤20、每个元素为字符串形式以及每个字符串长度≤64字节。

uid

当前服务进程的uid值。

gid

当前服务进程的gid值。

once

当前服务进程是否为一次性进程:

1:一次性进程,当该进程退出时,init不会重新启动该服务进程

0 : 常驻进程,当该进程退出时,init收到SIGCHLD信号并重新启动该服务进程;

注意:对于常驻进程,若在4分钟之内连续退出5次,第5次退出时init将不会再重新拉起该服务进程。

importance

当前服务进程是否为关键系统进程:

0:非关键系统进程,当该进程退出时,init不会将系统复位重启;

1:关键系统进程,当该进程退出时,init将系统复位重启。

caps

当前服务所需的capability值,根据安全子系统已支持的capability,评估所需的capability,遵循最小权限原则配置(当前最多可配置100个值)。

相关仓

启动恢复子系统

startup_syspara_lite

startup_appspawn_lite

startup_bootstrap_lite

startup_init_lite

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such entity. "You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License. "Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files. "Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled object code, generated documentation, and conversions to other media types. "Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice that is included in or attached to the work (an example is provided in the Appendix below). "Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License, Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative Works thereof. "Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal, or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a Contribution." "Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and subsequently incorporated within the Work. 2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform, sublicense, and distribute the Work and such Derivative Works in Source or Object form. 3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this License for that Work shall terminate as of the date such litigation is filed. 4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions: (a) You must give any other recipients of the Work or Derivative Works a copy of this License; and (b) You must cause any modified files to carry prominent notices stating that You changed the files; and (c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and (d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy of the attribution notices contained within such NOTICE file, excluding those notices that do not pertain to any part of the Derivative Works, in at least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License. You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the Work, provided that such additional attribution notices cannot be construed as modifying the License. You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use, reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution of the Work otherwise complies with the conditions stated in this License. 5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above, nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such Contributions. 6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor, except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file. 7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your exercise of permissions under this License. 8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses), even if such Contributor has been advised of the possibility of such damages. 9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS

简介

init process for startup | 启动模块init进程 展开 收起
C
Apache-2.0
取消

发行版

暂无发行版

贡献者

全部

近期动态

不能加载更多了
马建仓 AI 助手
尝试更多
代码解读
代码找茬
代码优化
C
1
https://gitee.com/zhaoguojian/startup_init_lite.git
git@gitee.com:zhaoguojian/startup_init_lite.git
zhaoguojian
startup_init_lite
startup_init_lite
OpenHarmony-v3.0.5-LTS

搜索帮助

0d507c66 1850385 C8b1a773 1850385