iotest.c

IO测试

#include<stdio.h>
#include<sys/ioctl.h>
#include<fcntl.h>
#include<unistd.h>
#define DEVICE_NAME "/dev/IOdriver"
int main()
{
	int fd;
	int i;
	int out=0;
	fd=open(DEVICE_NAME,O_RDWR);
	if(fd<0)
	{
		printf("error\n");
	}
	else
	{
		printf("success\n");
	}
	while(1){
		ioctl(fd,out);
		out--;
		if(out<0)out=1;
		for(i=0;i<50000000;i++);
		}
	close(fd);
	printf("End of Test\n");
	return 0;
}