// gcc -o xkev -Wall xkev.c -L/usr/X11R6/lib -lX11
#include <stdio.h>
#include <assert.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

int main(int argc, char **argv)
{
	Display *d = XOpenDisplay(NULL);
	assert(d);

	int s = XDefaultScreen(d);
	Window w = XCreateSimpleWindow(d,
			XRootWindow(d, s), 0, 0, 320, 240, 0,
			XBlackPixel(d, s), XWhitePixel(d, s));
	assert(w);

	XTextProperty title;
	XStringListToTextProperty(argv, 1, &title);
	XSetWMName(d, w, &title);
	XSetWMIconName(d, w, &title);
	XFree(title.value);

	XSelectInput(d, w, KeyPressMask | KeyReleaseMask);
	XMapWindow(d, w);

	while (1) {
		XEvent ev;
		XNextEvent(d, &ev);

		XKeyEvent *evp = &ev.xkey;
		assert(evp->type == KeyPress || evp->type == KeyRelease);

		char *what = (evp->type == KeyPress) ? "press" : "release";
		unsigned int kc = evp->keycode;
		KeySym ks = XKeycodeToKeysym(d, kc, 0);
		char *str = XKeysymToString(ks);

		fprintf(stderr, "%s	%s	(kc=%u ks=%lu)\n",
				what,	str,	kc, ks);
	}
	return 0;
}