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

int main(int argc, char const *argv[])
{
    Display *dpy;
    XkbDescPtr xkb;
    int major = XkbMajorVersion, minor = XkbMinorVersion;

    dpy = XkbOpenDisplay(NULL, NULL, NULL, &major, &minor, NULL);
    if (dpy == NULL) {
        fprintf(stderr, "%s\n", "no display");
        return 1;
    }

    xkb = XkbGetKeyboard(dpy, XkbAllComponentsMask, XkbUseCoreKbd);
    if (xkb != NULL) {
        char *atom_name = XGetAtomName(dpy, xkb->names->keycodes);
        printf("keycodes %s\n", atom_name);
        XFree(atom_name);
        XkbFreeKeyboard(xkb, XkbAllComponentsMask, True);
    } else {
        fprintf(stderr, "%s\n", "no keyboard description");
    }
    XCloseDisplay(dpy);

    return 0;
}