#include 
#include 
#include 
#include 
 
int main(void)
{
	int on;
	int led_no;
	int fd;
 
	printf("输入led号\n");
	scanf("%d",&led_no);
		if (led_no>3||led_no<0){
 			printf("请输入正确led号\n");
 			return 0;;
 		}
 	printf("输入led状态\n(1为开,0为关)\n");
 	scanf("%d",&on);
 		if (on>1||on<0){
			printf("请输入正确的状态指示\n");
			return 0;;
		}
 
	fd = open("/dev/leds0", 0);
	if (fd < 0) {
		fd = open("/dev/leds", 0);
	}
	if (fd < 0) {
		perror("open device leds");
		exit(1);
	}
	ioctl(fd, on, led_no);
	close(fd);
	return 0;
}