pub fn output_backend_stdin() -> Result<Stdio, Error>Expand description
Returns the stdin to hand a guest run in an output-capturing backend.
When reserve_output_stdin_snapshot has stored a replayable snapshot the
file is rewound and a fresh descriptor handed to the guest, so each
--verify run reads identical input. Otherwise (no snapshot reserved, or a
terminal/absent stdin) the guest gets /dev/null, matching the previous
behavior for callers that do not reserve a snapshot.