screen_get_device_property_cv()
Retrieve the current value of the specified device property of type char.
Synopsis:
#include <screen/screen.h>
int screen_get_device_property_cv(screen_device_t dev, int pname, int len, char *param)
Arguments:
- dev
-
The handle of the device whose property is being queried.
- pname
-
The name of the property whose value is being queried. The properties available for query are of type Screen property types.
- len
-
The maximum number of bytes that can be written to param.
- param
-
The buffer where the retrieved value(s) will be stored. This buffer must be an array of type char with a maximum length of len.
Library:
libscreenDescription:
Function Type: Flushing Execution
This function stores the current value of a device property in a user-provided buffer. No more than len bytes of the specified type will be written.
The values of the following properties can be retrieved using this function:
Returns:
0 if a query was successful and the value(s) of the property are stored in param, or -1 if an error occurred (errno is set).