/*
 *  gcc -Wall -o CapsLockToggle CapsLockToggle.c -L/usr/X11R6/lib -lX11 -lXtst
 */

#include <stdio.h>
#include <stdlib.h>
#include <X11/Xlib.h>
#include <X11/extensions/XTest.h>
#include <X11/XKBlib.h>
#include <X11/keysym.h>

int main (void)
{
    char *display_name;
    Display *d;

    display_name=getenv("DISPLAY");
    d = XOpenDisplay(display_name);

    if (d == NULL) {
	printf("Unable to open Display: %s\n", display_name);
        exit(1);
    }

    XTestFakeKeyEvent( d, XKeysymToKeycode( d, XK_Caps_Lock ), True, CurrentTime );
    XTestFakeKeyEvent( d, XKeysymToKeycode( d, XK_Caps_Lock ), False, CurrentTime );

    XCloseDisplay(d);

    return 0;
}