Function place_put_back 

fn place_put_back(
    folder: &Path,
    key: &[u8; 32],
    memory: &Path,
    opened: &Path,
    path: &Path,
    store: &Store,
    when: SystemTime,
    h: &str,
    stop: &mut Option<String>,
) -> bool

One file of “Put them back” placed, under the exchanges’ lock (its caller’s hold): after a last look (nothing at its place, a link included, and still a place the sharing writes), in its own folders made only now (L-1), dated as it was only now (M-1), through a hard link that takes only a free name. Whether it came back; the file opened beside goes in any case. A folder that cannot be made stops the put back, said.