pub fn stream_copy(src: &Path, dst: &Path) -> Result<u64>Expand description
Copies a single file using buffered streaming I/O.
Reads and writes in STREAM_BUFFER_SIZE chunks. Memory usage is
constant regardless of file size — a 1 KB file and a 1 GB file
use the same buffer.
§Errors
Returns an error if the source cannot be read or the destination cannot be written.