Function nix::fcntl::renameat2

pub fn renameat2<P1: ?Sized + NixPath, P2: ?Sized + NixPath>(
    old_dirfd: Option<RawFd>, 
    old_path: &P1, 
    new_dirfd: Option<RawFd>, 
    new_path: &P2, 
    flags: RenameFlags
) -> Result<()>