you wouldn't see it on Linux as pipes are implemented using complete pages (always powers of 2), but there's probably some OS out there with a different impleme

you wouldn't see it on Linux as pipes are implemented using complete pages (always powers of 2), but there's probably some OS out there with a different implementation where you can set the buffer size to be an odd number, and then you'd see the bug with plain simple cat I didn't say you'd likely see it in practice :)