harmony 鸿蒙param
param
The param tool enables you to operate system parameters. It is valid only for standard-system devices.
Environment Setup
- You have obtained the hdc tool to run hdc shell commands.
- The device is properly connected.
param Commands
| Command | Description |
|---|---|
| -h | Obtains the commands supported by param. |
| ls [-r] [name] | Displays the information about the system parameter that matches the given name. If -r is carried, the information is obtained based on the parameter permission. If -r is not carried, the information is directly obtained. |
| get [name] | Obtains the value of the system parameter with the given name. If no name is specified, the values of all system parameters are returned. |
| set name value | Sets the value for the system parameter with the given name. |
| wait name [value] [timeout] | Waits for the system parameter with the given name to match the specified value. Fuzzy match is supported. For example, * indicates any value, and val* indicates matching of only the first three val characters. timeout indicates the waiting time, in seconds. If it is not set, the default value 30s is used. |
| save | Persistently saves the parameters to the workspace. |
-h
- Obtains the commands supported by the param tool.
param -h
ls
- Displays the information about the system parameter that matches the given name.
param ls [-r] [name]
Example
get
- Obtains the value of the system parameter with the given name.
param get [name]
Example
set name value
- Sets the value for the system parameter with the given name.
param set name value
Example
wait name
- Waits for the system parameter with the given name to match the specified value.
param wait name [value] [timeout]
Example
save
- Persistently saves the parameters to the workspace.
param save
Example
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