fn main() {
    let path = "/tmp/nc-ioctl";
    let ret = unsafe { nc::openat(nc::AT_FDCWD, path, nc::O_WRONLY | nc::O_CREAT, 0o644) };
    assert!(ret.is_ok());
    let fd = ret.unwrap();
    let mut attr: i32 = 0;
    let cmd = nc::FS_IOC_GETFLAGS;
    let ret = unsafe { nc::ioctl(fd, cmd, &mut attr as *mut i32 as *const _) };
    assert!(ret.is_ok());
    println!("attr: {}", attr);

    let ret = unsafe { nc::close(fd) };
    assert!(ret.is_ok());
    let ret = unsafe { nc::unlinkat(nc::AT_FDCWD, path, 0) };
    assert!(ret.is_ok());
}