On Friday 23 Sep 2022, at 10:29, RVP wrote: > So, O_NONBLOCK is, at least, _definitely_ non-portable. Best to use > fcntl() here and not depend on a Linux-specific behaviour.
Fair enough :) Then, shouldn't the open(2) (and posix_openpt(3)) at least fail with EINVAL or something if other flags are specified?
