On Wed, Oct 25, 2023 at 1:35 AM tom kronmiller wrote: > On Tue, Oct 24, 2023 at 12:02 PM Max Nikulin wrote: > >> On 24/10/2023 12:18, tom kronmiller wrote: >> > so I unbuffered stdin and that seemed to make it happy. >> It might be performance killer. Even fflush(NULL) before fork() may be >> better. >> > In the real program in question, it hardly matters. It is very heavily > compute-bound on inputs which are small. But flushing() the files seems a > better idea in general than unbuffering, so I changed it. (Still works.) >
By the way, one last way to get in trouble: fflush(NULL) only flushes output files, so an explicit fflush(stdin) is still needed. "If the stream argument is NULL, fflush() flushes all open *output* streams" per the man page on my system.
