> You are right. I see what is going on now. NetBSD is the only of the OS's
> you mentioned that uses socketpair for pipes. I bet if you change your
> program to use socketpair() on OpenBSD it will fail the same way.

Where do we use socketpair()? sys_pipe() calls socreate() to create two
UNIX domain sockets, and then it connects them. It seems to me that
OpenBSD is doing the same thing.

-- 
Emmanuel Dreyfus.
Si la reponse est NT, c'est probablement 
que vous n'avez pas compris la question.
p99dreyf@criens.u-psud.fr