param Tool

Note:

Currently in the beta phase.

param is a system parameter operation tool for developers, which only supports standard systems.

Environment Requirements

• Obtain the hdc tool and execute hdc shell.
• Ensure the device is properly connected.

param Command List

Option	Description
-h	Get the commands supported by param.
ls [-r] [name]	Display system parameter information matching the name. With "-r", it retrieves information based on parameter permissions; without "-r", it directly fetches parameter information.
get [name]	Get the value of the specified system parameter by name; if no name is specified, returns all system parameters.
set name value	Set the value of the specified system parameter by name.
wait name [value] [timeout]	Synchronously wait for the specified system parameter to match the given value. Value supports fuzzy matching, e.g., "*" for any value, "val*" for values starting with "val". Timeout is the wait duration (in seconds), defaulting to 30s if not specified.
save	Save persist parameters to the workspace.

Get Commands Supported by param

• To get the commands supported by param, use the following format:

  param -h
  

Get System Parameter Information

• Display system parameter information matching the name, using the following format:

  param ls [-r] [name]
  

  Examples:

  

Get System Parameter Values

• Get the value of the specified system parameter by name, using the following format:

  param get [name]
  

  Example:

  

Set System Parameter Values

• Set the value of the specified system parameter by name, using the following format:

  param set name value
  

  Example:

  

Wait for System Parameter Value Match

• Synchronously wait for the specified system parameter to match the given value, using the following format:

  param wait name [value] [timeout]
  

  Example:

  

Save Persist Parameters

• Save persist parameters to the workspace, using the following format:

  param save
  

  Example: