From owner-freebsd-hackers  Wed Feb 10 08:36:17 1999
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To: Terry Lambert <tlambert@primenet.com>
cc: peter@netplex.com.au (Peter Wemm), kuku@gilberto.physik.RWTH-Aachen.DE,
        hackers@FreeBSD.ORG
Subject: Re: portability of shm, mmap, pipes and socket IPC 
In-reply-to: Your message of "Wed, 10 Feb 1999 16:30:05 GMT."
             <199902101630.JAA08698@usr07.primenet.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Wed, 10 Feb 1999 08:33:43 -0800
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>> > > pipes - ? named pipes?
>> > 
>> > FreeBSD pipes are bidirectional, since they are implemented with the
>> > 	AF_UNIX socket code.
>> 
>> Rubbish!  They are quite seperate to an AF_UNIX socketpair() and have been 
>> for a *long* time (since 1996 when 2.2 was branched).
>
>Sorry again; I got confused.  It's the IPC code that's implemented with
>the sys_socket.c's struct fileops referenced by uipc_syscalls.c.

   Wrong file for pipes. See sys_pipe.c.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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