編譯報(bào)錯(cuò)ioctl: Operation not supported

xiaoruoax

程序如下：
/*
* setext2.c - Set ext2 special flags
*/
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <linux/ext2_fs.h>
#include <sys/ioctl.h>
#include <errno.h>

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

    /* Usage nag */
    if (argc != 2) {
        puts("USAGE:setext2 {filename}");
        exit(EXIT_FAILURE);
    }

    if ((fd = open(argv[1], O_RDONLY)) < 0) {
        perror("open");
        exit(EXIT_FAILURE);
    }
    /* These are the flags we'll set on the file */
    flags = EXT2_SYNC_FL | EXT2_NODUMP_FL;
    if (ioctl(fd, EXT2_IOC_SETFLAGS, &flags)) {
        perror("ioctl");
        close(fd);
        exit(EXIT_FAILURE);
    }

    if (flags & EXT2_SYNC_FL)
        puts("SYNC flag set");
    if (flags & EXT2_NODUMP_FL)
        puts("NODUMP flag set");

    close(fd);
    exit(EXIT_SUCCESS);
}
編譯成功：gcc setext2.c -o setext2
執(zhí)行測試：touch foo
              ./setext2 foo命令報(bào)錯(cuò)呢
報(bào)錯(cuò)為：ioctl: Operation not supported
是我缺少什么庫文件嗎？請(qǐng)大俠幫忙