recv and errno during a connection reset/closed by peer

[Brian Ford]

On Fri, 25 Mar 2005, Peter Stephens wrote:

> I boiled this down to nothing(see below).  I must be missing something
> basic.

Yup.

> I tried the suggestions made so far and it never gets to:
>
> 	printf(" >>> ERRNO %i\n", errno);
>
> I would expect that on a disconnect (I use putty in telnet or raw mode) it
> would return -1 whether it is doing MSG_PEEK or an actual retrieval.  No
> luck.

Nope (http://www.opengroup.org/onlinepubs/7990989775/xns/recv.html):

"If no messages are available to be received and the peer has performed an
orderly shutdown, recv() returns 0."

I think that's what you're missing.

-- 
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained pilot...

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