Retrieve the current value of the specified event property of type char.
#include <screen/screen.h>
int screen_get_event_property_cv(screen_event_t ev, int pname, int len, char *param)
The handle of the event whose property is being queried.
The name of the property whose value is being queried. The properties available for query are of type Screen property types.
The maximum number of bytes that can be written to 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.
Function Type: Immediate Execution
This function stores the current value of an event property in a user-provided buffer. No more than len bytes of the specified type will be written. The list of properties that can be queried per event type are listed as follows:
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; refer to /usr/include/errno.h for more details).