/* 
	switch_from_x.c
 	compile with : 
	gcc -I/usr/X11R6/include -L/usr/X11R6/lib -o switch_from_x switch_from_x.c -lX11 -lXtst
	
	usage: switch_from_x [1..6] 
	emulate ctrl+alt+F1..F6
	It use F1 by default
*/


#include <X11/extensions/XTest.h>
#define XK_MISCELLANY
#define XK_XKB_KEYS
#include <X11/keysymdef.h>
#include <X11/Xlib.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
	int i;
	KeySym keys[3];
	KeySym fkeys[] = {XK_F1, XK_F2, XK_F3, XK_F4, XK_F5, XK_F6};
	
	Display* display = XOpenDisplay( NULL );
	
	if(!display) {
		printf("Error, can't open X display\n");
		exit(EXIT_FAILURE);
	}

	keys[0]	= XK_Meta_L;
	keys[1] = XK_Control_L;
	keys[2] = XK_F1;
	
	if(argc > 1) {
		i = atoi(argv[1]);
		if(i && i < 7) { keys[2] = fkeys[i-1]; }
	}
	
	for( i = 0; i < 3; i++ ) {
		XTestFakeKeyEvent ( display, XKeysymToKeycode( display, keys[i] ), 
							True, CurrentTime );
    }

	if( display == NULL ) exit(EXIT_FAILURE);
	XCloseDisplay(display);
	return 0;
}