sig-basicsoftwareservice.md

# SIG_BasicSoftwareService 
English | [简体中文](./sig-basicsoftwareservice_cn.md)

Note: The content of this SIG follows the convention described in OpenHarmony's PMC Management Charter [README](/zh/pmc.md).

## SIG group work objectives and scope

### Work Goals
Provide simple and effective Basic Software Services for Open Harmony Operating System; By modular design, Basic Software Services can support various kinds of devices, scaling from Level 0 to Level 5.

OpenHarmony Basic Software Services technology stack scope is shown in the following figure:

![image-20220722232439502](./images/overview.png)

### Work Scope
Basic Software Services includes the following sub-systems:
| Name|Explanation|
| :----- | :----- |
|Startup SubSystem|Booting OpenHarmony, and provide init process manager and system parameters for the whole system|
|Upgrade SubSystem|Provide Operating System upgrade capability|
|DFX SubSystem|Design-for-Test, Design-for-Reliability and Design-for-Manufacturing|
|Account Management SubSystem|Manage user accounts for Open Harmony|
|Barrier Free SubSystem|Provide barrier free common capabilities for Open Harmony|
|Customization SubSystem|Provide customization framework for OpenHarmony|

## The repositories

| Component Name               | Repository                                                   | Component Description                                        |
| :--------------------------- | :----------------------------------------------------------- | ------------------------------------------------------------ |
| System Log                   | [hiviewdfx_hilog](https://gitee.com/openharmony/hiviewdfx_hilog) | HiLog provides logging utilities for system services and applications. |
| Log for Lite                 | [hiviewdfx_hilog_lite](https://gitee.com/openharmony/hiviewdfx_hilog_lite) | Logging system for OpenHarmony mini and small system.        |
| Calling Tracer               | [hiviewdfx_hitrace](https://gitee.com/openharmony/hiviewdfx_hitrace) | Distributed tracing utilities for performance debugging.     |
| Log&Event Service            | [hiviewdfx_hiview](https://gitee.com/openharmony/hiviewdfx_hiview) | hiview component provides logging statistic utilities for business intelligence. It has a plugin platform for extending. |
| Log&Event Task for Lite      | [hiviewdfx_hiview_lite](https://gitee.com/openharmony/hiviewdfx_hiview_lite) | hivew service for OpenHarmony mini and small system.         |
| Checking Mode                | [hiviewdfx_hichecker](https://gitee.com/openharmony/hiviewdfx_hichecker) | hicheck is used to help detect faults may be encountered during application development. |
| Process Stuck Detect         | [hiviewdfx_hicollie](https://gitee.com/openharmony/hiviewdfx_hicollie) | hicollie provides process stuck detection and watchdog framework for developers. |
| Application Event            | [hiviewdfx_hiappevent](https://gitee.com/openharmony/hiviewdfx_hiappevent) | hiappevent provides event reporting, persisting and querying capabilities for application development. |
| System Event                 | [hiviewdfx_hisysevent](https://gitee.com/openharmony/hiviewdfx_hisysevent) | hisysevent provides event reporting, persisting and querying capabilities for system development. |
| System Event for Lite        | [hiviewdfx_hievent_lite](https://gitee.com/openharmony/hiviewdfx_hievent_lite) | hievent_lite provides fault logging, user activity and power comsumption statistics for mini and small system. |
| Fault Logger                 | [hiviewdfx_faultloggerd](https://gitee.com/openharmony/hiviewdfx_faultloggerd) | faultloggerd can collect logs when native processes crash.   |
| System Info Dump             | [hiviewdfx_hidumper](https://gitee.com/openharmony-sig/hiviewdfx_hidumper) | hidumper can export information about CPU, memory and System Abilities. |
| System Info Dump for Mini    | [hiviewdfx_hidumper_mini](https://gitee.com/openharmony/hiviewdfx_hidumper_lite) | hidumper for OpenHarmony small system.                       |
| System Info Dump for Lite    | [hiviewdfx_hidumper_lite](https://gitee.com/openharmony/hiviewdfx_hidumper_lite) | hidumper for OpenHarmony mini system.                        |
| Fault log for kernel         | [hiviewdfx_blackbox](https://gitee.com/openharmony/hiviewdfx_blackbox) | blackbox can help collecting logs when system panic.         |
| HiPerf                       | [hiperf](https://gitee.com/openharmony/developtools_hiperf)  | hiperf can help developers to collect performace logs.       |
| Profiler                     | [hiprofiler](https://gitee.com/openharmony/hiviewdfx_blackbox) | profiler is used by IDE for performance optimization.        |
| Trace Optimizer              | [developtools_bytrace](https://gitee.com/openharmony/developtools_bytrace) | bytrace proivdes performance tracing API for applications.   |
| Device Debugging Collector   | [developtools_hdc](https://gitee.com/openharmony/developtools_hdc) | hdc is OpenHarmony device debugging collector.               |
| Bootstrapping for Lite       | [startup_bootstrap_lite](https://gitee.com/openharmony/startup_bootstrap_lite) | bootstrap provides starting API to bootstrap system abilities for OpenHarmony lite system. |
| init                         | [startup_init_lite](https://gitee.com/openharmony/startup_init_lite) | init is used to start all userspace native processes.        |
| Application Spawn            | [startup_appspawn](https://gitee.com/openharmony/startup_appspawn) | Appspawn is used to spawn application processes.             |
| OpenHarmony Verified Boot    | [startup_hvb](https://gitee.com/openharmony/startup_hvb)     | hvb is used to verify and authenticate system images to make sure OpenHarmony is running system images from authenticated sources without tampering, and can not roll back to old versions with vulnerabilities. |
| Updating Framework for Lite  | [update_sys_installer_lite](https://gitee.com/openharmony/update_sys_installer_lite) | sys_installer_lite provides OTA updating framework for OpenHarmony mini and small system. |
| Updating App                 | [update_app](https://gitee.com/openharmony/update_app)       | update_app provides user interfaces for end users to upgrade OpenHarmony devices. |
| Update Pakaging Tools        | [update_packaging_tools](https://gitee.com/openharmony/update_packaging_tools) | Update Packaging Tools provide tools to build full OTA packages and differential packages. |
| Update Package Installer     | [update_updater](https://gitee.com/openharmony/update_updater) | Update Package Installer can verify OTA package, and install the package to the OpenHarmony device. |
| Updating Service             | [update_updateservice](https://gitee.com/openharmony/update_updateservice) | Updating Service can query and download OTA packages.        |
| Update System Installer      | [update_sys_installer](https://gitee.com/openharmony/update_sys_installer) | Update System Installer can verify OTA package, and install the package to the OpenHarmony device for AB system. |
| Account Manager              | [account_os_account](https://gitee.com/openharmony/account_os_account) | Account Manager can create/delete, login/logout and query system accounts. It can also manage application accounts and distributed accounts. |
| Barrier Free Service         | [accessibility](https://gitee.com/openharmony/accessibility) | Barrier Free Service can provide information exchange framework between application and accessibilities applications. |
| Enterprise Device Management | [customization_enterprise_device_management](https://gitee.com/openharmony-sig/customization_enterprise_device_management) | Enterprise Device Management provide API for enterprise applications to manager OpenHarmony devices in scale. |
| Customization Framework      | [config_policy](https://gitee.com/openharmony/customization_config_policy) | Customization Framework provide API for accessing configuration files with priority. |
| libabigail                   | [third_party_libabigail](https://gitee.com/openharmony-sig/third_party_libabigail) | ABI check for dynamic libraries of different versions. |
| elfutils                     | [third_party_elfutils](https://gitee.com/openharmony-sig/third_party_elfutils) | A collection of tools and libraries for reading, creating and modifying ELF binaries, finding and processing DWARF debug data, symbols, thread status, and stack trace of processes and core files on GNU/Linux. |

## SIG Members

### Leader
- @handyohos(https://gitee.com/handyohos)
- @ericlee(https://gitee.com/ericlee)

### Committers
|SubSystem|Committer|Mail|
| :----- | :----- |:----- |
|HiviewDFX|[stesen](https://gitee.com/stesen)|[mail](stesen.ma@huawei.com)|
|HiviewDFX|[ericlee](https://gitee.com/ericlee)|[mail](liyu1@huawei.com)|
|HiviewDFX|[maplestorys](https://gitee.com/maplestorys)|[mail](zengzhi5@huawei.com)|
|HiviewDFX|[yaomanhai](https://gitee.com/yaomanhai)|[mail](yaomanhai@huawei.com)|
|HiviewDFX|[shenchenkai](https://gitee.com/shenchenkai)|[mail](shenchenkai@huawei.com)|
|HiviewDFX|[guochuanqi](https://gitee.com/guochuanqi)|[mail](guochuanqi@huawei.com)|
|HiviewDFX|[qidechun](https://gitee.com/pcwlno1)|[mail](qidechun@huawei.com)|
|StartUp|[handyohos](https://gitee.com/handyohos)|[mail](zhangxiaotian@huawei.com)|
|StartUp|[derek520](https://gitee.com/derek520)|[mail](wtweitao.wei@huawei.com)|
|StartUp|[mytide](https://gitee.com/mytide)|[mail](max.liuwei@huawei.com)|
|Update|[ailorna](https://gitee.com/ailorna)|[mail](hehuan1@huawei.com)|
|Account|[verystone](https://gitee.com/verystone)|[mail](xudaqing@huawei.com)|
|Barrier Free|[dubingjian](https://gitee.com/bj1010)|[mail](dubingjian@huawei.com)|
| Customization |[jameshw](https://gitee.com/jameshw)|[mail](jameslee@huawei.com)|

### Meetings
 - Meeting time: Wednesday at 14:00 o'clock, biweekly
 - Meeting proposal: [OpenHarmony SIG-BasicSoftware Meeting Proposal](https://etherpad.openharmony.cn/p/sig-basicsoftware)
 - Meeting link: Welink

### Contact (optional)

- Mailing list：stesen.ma@huawei.com;liyu1@huawei.com;zengzhi5@huawei.com;yaomanhai@huawei.com;shenchenkai@huawei.com;guochuanqi@huawei.com;zhangxiaotian@huawei.com;wtweitao.wei@huawei.com;hehuan1@huawei.com;hw.liuwei@huawei.com;xudaqing@huawei.com;qidechun@huawei.com
- Zulip group: https://zulip.openharmony.cn
- Wechat group：NA