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From: Larry McVoy <lm@mcvoy.com>
To: Grant Taylor <gtaylor@tnetconsulting.net>
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Subject: Re: [TUHS] sockets (was Re: First appearance of named pipes)
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On Mon, Mar 09, 2020 at 05:22:57PM -0600, Grant Taylor via TUHS wrote:
> On 3/8/20 9:13 AM, Derek Fawcus wrote:
> >Now what would have been useful is a way to have distinct fd's for the
> >local read and write end of (e.g.) a TCP socket - such that one direction
> >could be closed w/o closing the other.
> 
> I believe that this can be done, now.  At least I've read that it's possible
> for one end to close (FIN) a TCP connection without the other end also
> closing.  Thus you end up with the one-way data flow that is still ACKed the
> way that TCP does.

Yes, it can be tricky to do it portably but I have.