//-------------------------------------------------------------------
//	tryioctl.cpp
//
//	This program exercises our 'ioctl.c' device-driver services.
//
//	programmer: ALLAN CRUSE
//	written on: 19 NOV 2004 -- for Linux kernel version 2.4.26.
//	revised on: 16 MAR 2005 -- for Linux kernel version 2.6.10.
//-------------------------------------------------------------------

#include <stdio.h>	// for perror() 
#include <fcntl.h>	// for open() 
#include <stdlib.h>	// for exit() 
#include <unistd.h>	// for close() 
#include <sys/ioctl.h>	// for ioctl()

#define HIDE_CURSOR	0
#define SHOW_CURSOR	1

char devname[] = "/dev/vram";

int main( int argc, char **argv )
{
	// install driver and open device-file
	system( " /sbin/insmod ioctl.ko" );
	int	fd = open( devname, O_RDWR );
	if ( fd < 0 ) { perror( devname ); exit(1); }
	getchar();

	// hide the graphics cursor
	ioctl( fd, HIDE_CURSOR );
	getchar();

	// show the graphics cursor
	ioctl( fd, SHOW_CURSOR );
	getchar();

	// close device-file and remove driver
	close( fd );
	system( "/sbin/rmmod ioctl" );
}