Application privileges are high-level capabilities of an application, for example, restricting an application from being uninstalled or restricting application data from being deleted.
# Configuration and Installation of Pre-installed Applications
OpenHarmony supports differentiated configuration of preset applications on different devices.
Pre-installed applications are applications that are natively installed on a device from factory setup. OpenHarmony supports differentiated configuration of pr-installed applications on different devices.
In addition, OpenHarmony provides **GetCfgDirList** for your application to obtain the preset directories, such as **system**, **chipset**, **sys_prod**, and **chip_prod**, in ascending order of priority. For example, the priority of **chip_prod** is higher than that of **system**.
## Configuring Pre-installed Applications
## Configuring the Preset Applications to Be Installed
1. Before the configuration, run the following command to query the directories for pre-installed applications supported by the system:
```
hdc shell param get const.cust.config_dir_layer
```
The query result includes **system**, **chipset**, **sys_prod**, **chip_prod**, and more. The directories are listed in ascending order of priority. For example, **chip_prod** has higher priority than **system**. This document uses **/system/etc/app/** as an example.
### Procedure
2. Configure the HAP path on the device in the **install_list.json** file.
1. Add the application name in the preset directory as the application directory.
2. Preset the application in the application directory, for example, **/system/app/Hiworld/entry.hap**.
3. Add the application directory to [install_list.json](https://gitee.com/openharmony/vendor_hihope/blob/master/rk3568/preinstall-config/install_list.json) and configure **removable** as required.
```
hdc shell mount -o rw,remount /
hdc file recv /system/etc/app/install_list.json .
```
### Example
3. Configure **install_list**.
```
{
"install_list" : [
{
"app_dir" : "/system/app/Hiworld",
"removable": false // The application cannot be uninstalled.
"app_dir":"system/app/xxxx/yyyy", // HAP path on the device. If the directory does not exist, create it and push HAP to this directory.
"removable":true // Whether the application can be uninstalled. The value true means the application can be uninstalled; the value false means the opposite.
}
]
}
```
## Configuring the Preset Applications Not to Be Installed
4. Transfer the **install_list.json** file to the device, and restart the device for the modification to take effect.
After the pre-installed applications are updated, use either of the following methods to reinstall them:
- Method 1: Clear **/data** and restart the device. The applications will be automatically installed.
```
hdc shell mount -o rw,remount /
hdc shell rm /data/* -rf
hdc shell sync
hdc shell /system/bin/udevadm trigger
hdc shell reboot
```
- Method 2: Run the following command to restart the device. The applications will be installed.
If an application has been installed, the application version No. ([versionCode](../../application-dev/quick-start/app-configuration-file.md) configured in **app.json5** for the stage model or [code](../../application-dev/quick-start/app-structure.md#internal-structure-of-the-version-atttribute) in the configuration file for the FA model) sent to the **/system/app/** directory must be later than the version number of the application installed.
```
hdc shell mount -o rw,remount /
hdc shell param set persist.bms.test-upgrade true
hdc shell reboot
```
# Configuring Applications Not Installed
The configuration priority of [**uninstall_list.json**](https://gitee.com/openharmony/vendor_hihope/blob/master/rk3568/preinstall-config/uninstall_list.json) is higher than that of**install_list.json**. The applications added to **uninstall_list.json** will not be installed.
The [**uninstall_list.json**](https://gitee.com/openharmony/vendor_hihope/blob/master/rk3568/preinstall-config/uninstall_list.json) has higher configuration priority than**install_list.json**. The applications added to **uninstall_list.json** will not be installed.
### Example 1:
## Example 1
```
/system/etc/app/uninstall_list.json
...
...
@@ -39,7 +77,7 @@ The configuration priority of [**uninstall_list.json**](https://gitee.com/openha
