That wouldn't work well because you'd need to re-open and seek (or re-read) before continuing. Ideally readfile would take and return a filefd (default -1); if

That wouldn't work well because you'd need to re-open and seek (or re-read) before continuing. Ideally readfile would take and return a filefd (default -1); if present, skip the open and just read (closing on EOF). This also fixes the EINTR/SA_RESTART issue loeg[0] raised. From a C perspective, it does have a problem of needing to return multiple values (both a fd and a bytecount), though. 0: https://news.ycombinator.com/item?id=22509329 https://news.ycombinator.com/item?id=22509329