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

#include <linux/raid/md_u.h>
#include <linux/major.h>
#include </usr/include/linux/fs.h>

int main(int argc, char *argv[])
{
    int fd;

	if (argc != 2)
       fprintf(stderr, "Usage: %s <md device>\n", argv[0]);

	
    if ((fd = open(argv[1], O_RDONLY)) == -1) {
       fprintf(stderr, "Can't open md device %s\n", argv[1]);
       return -1;
    }

	if (ioctl(fd,  BLKRRPART, NULL) != 0) {
       fprintf(stderr, "ioctl failed\n");
        close (fd);
        return -1;
    }

    close (fd);

    return 0;
}