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RE: recv and errno during a connection reset/closed by peer
- From: Brian Ford <ford at vss dot fsi dot com>
- To: Peter Stephens <ptfoof at sbcglobal dot net>
- Cc: cygwin at cygwin dot com
- Date: Mon, 28 Mar 2005 10:36:42 -0600
- Subject: RE: recv and errno during a connection reset/closed by peer
- References: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAUKQItienSEKG+9226yKd5cKAAAAQAAAAdHONqHuj7UCiZ/oSiFrXiwEAAAAA@sbcglobal.net>
- Reply-to: cygwin at cygwin dot com
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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