> My question is therefore: Who is right? Is pipes in Linux not
> implemented using sockets, and if it is, why aren't pipes bi-directional?
As a general rule, pipes are not guaranteed to be bidirectional; the
most portable way to get the behavior you want is to use socketpair().
-- Aaron M. Ucko (amu@mit.edu) | For Geek Code, PGP public key, and other info, finger amu@monk.mit.edu. | "Kids! Bringing about Armageddon can be dangerous. Do not attempt it in your home." -- T. Pratchett & N. Gaiman, _Good Omens_