ioctl_test

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

/*
 * Find out what we get back when we request
 * ioctl 0x40204d01 on /dev/mtd1
 */

int main(void)
{
    int data[12];
    int request=0x40204D01;
    int fd;
    int oflag=2;
    int ret;
    int i;

    memset(data,'A',sizeof(data));

    printf("Opening /dev/mtd1.\n");
    fd=open("/dev/mtd1",oflag);
    if(0>fd)
    {
        perror("open");
        exit(1);
    }

    printf("requesting ioctl. %#010x\n",request);
    ret=ioctl(fd,request,data);

    if(0!=ret)
    {
        perror("ioctl");
        close(fd);
        exit(1);
    }

    close(fd);

    printf("data ints:\n");

    for(i=0;i<sizeof(data)/sizeof(int);i++)
    {
        printf("%#010x\n",data[i]);
    }

    printf("Opening outfile /tmp/data.bin\n");

    fd=open("/tmp/data.bin",O_CREAT|O_WRONLY);
    if(0>fd)
    {
        perror("open");
        exit(1);
    }

    printf("Writing ioctl data to outfile.\n");
    if(0>write(fd,data,sizeof(data)))
    {
        perror("write");
        close(fd);
        exit(1);
    }

    close(fd);
    exit(0);
}