Untitled

#include <stdio.h>#include <X11/Xlib.h>int main(void){	Display *dpy;	unsigned char map_ret[256];	int nbut;	if(!(dpy = XOpenDisplay(0))) {		fprintf(stderr, "failed to connect to the X server\n");		return 1;	}	nbut = XGetPointerMapping(dpy, map_ret, 256);	printf("number of mouse buttons: %d\n", nbut);	XCloseDisplay(dpy);	return 0;}