pub fn write_bytes_atomic(path: &Path, bytes: &[u8]) -> Result<(), String>Expand description
Replace path with bytes atomically, leaving no temp file behind
on any exit path, and reap temps abandoned by processes that are gone.
The caller is expected to already hold whatever lock serializes
writers of path (both shard caches take an flock first); this
function only guarantees that a reader never sees a half-written
file and that a failed write does not leak one.