Function nc::fchownat

pub fn fchownat(
    dirfd: i32, 
    filename: &str, 
    user: uid_t, 
    group: gid_t, 
    flag: i32
) -> Result<(), Errno>

Change ownership of a file.

let filename = "/tmp/nc-fchown";
let ret = nc::creat(filename, 0o644);
assert!(ret.is_ok());
let fd = ret.unwrap();
assert!(nc::close(fd).is_ok());
let ret = nc::fchownat(nc::AT_FDCWD, filename, 0, 0, 0);
assert!(ret.is_err());
assert_eq!(ret, Err(nc::EPERM));
assert!(nc::unlink(filename).is_ok());