Function nc::fchdir

pub fn fchdir(fd: i32) -> Result<(), Errno>

Change working directory.

let path = "/tmp";
// Open folder directly.
let fd = nc::open(path, nc::O_PATH, 0);
assert!(fd.is_ok());
let fd = fd.unwrap();
let ret = nc::fchdir(fd);
assert!(ret.is_ok());
assert!(nc::close(fd).is_ok());