#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/ioctl.h>

#include "006_cnt.h"

void up_dev( int fd ) {
	if ( ioctl( fd, CNT_UP ) == -1 )
		perror( "006_app up_dev" );
}

void down_dev( int fd ) {
	if ( ioctl( fd, CNT_DOWN ) == -1 )
		perror( "006_app down_dev" );
}

int main( int argc, char *argv[] ) {
	char *file_name = "/dev/Danh_LedDev";
	int fd;

	enum {
		o_up,
		o_down
	} option;

	if ( argc == 1 )
		option = o_up;
	else if ( argc == 2 ) {
		if ( strcmp( argv[1], "-u" ) == 0 )
			option = o_up;
		else if ( strcmp( agrv[1], "-d" ) == 0 )
			option = o_down;
		else {
			fprintf( stderr, "Invalid operation\n");
			return 1;
		}
	}
	else {
		fprintf( stderr, "Invalid operation\n" );
		return 1;
	}

	fd = open( file_name, O_RDWR );
	if ( fd == -1 ) {
		perror( "006_app open" );
		return 2;
	}

	switch ( option ) {
		case o_up:
			up_dev( fd );
			break;
		case o_down:
			down_dev( fd );
			break;
		default:
			break;
	}

	close( fd );
	return 0;
}