Function posish::fs::linkat

pub fn linkat<P: Arg, Q: Arg, PFd: AsRawFd, QFd: AsRawFd>(
    old_dirfd: &PFd, 
    old_path: P, 
    new_dirfd: &QFd, 
    new_path: Q, 
    flags: AtFlags
) -> Result<()>

linkat(old_dirfd, old_path, new_dirfd, new_path, flags)