#include <X11/Xlib.h>
#include <stdio.h>

int main(int argc, char **argv) {
   Display *d = XOpenDisplay(NULL);
   KeySym keysym = XStringToKeysym(argv[1]);
   KeyCode keycode = XKeysymToKeycode(d, keysym);
   printf("%s = %i = %i\n", argv[1], (int)keysym, (int)keycode);
   return 0;
}