wsdisplay_screentype
struct wsdisplay_screentype screens;
void print_screen(struct wsdisplay_screentype *);
print_screen((struct wsdisplay_screentype *) f->valp);
print_screen(struct wsdisplay_screentype *screens)
struct wsdisplay_screentype s;
#define WSDISPLAYIO_GETSCREENTYPE _IOWR('W', 93, struct wsdisplay_screentype)
#define d ((struct wsdisplay_screentype *)data)
struct wsdisplay_screentype screens;