From owner-freebsd-questions  Wed Aug 21 12: 4:31 2002
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 33E3037B400
	for <questions@FreeBSD.ORG>; Wed, 21 Aug 2002 12:04:28 -0700 (PDT)
Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101])
	by mx1.FreeBSD.org (Postfix) with ESMTP id AE3EF43E3B
	for <questions@FreeBSD.ORG>; Wed, 21 Aug 2002 12:04:27 -0700 (PDT)
	(envelope-from dan@dan.emsphone.com)
Received: (from dan@localhost)
	by dan.emsphone.com (8.12.5/8.12.5) id g7LJ4ROd039690;
	Wed, 21 Aug 2002 14:04:27 -0500 (CDT)
	(envelope-from dan)
Date: Wed, 21 Aug 2002 14:04:27 -0500
From: Dan Nelson <dnelson@allantgroup.com>
To: Gianmarco Giovannelli <gmarco@giovannelli.it>
Cc: questions@FreeBSD.ORG
Subject: Re: Porting from win32 to UNIX: Sockets
Message-ID: <20020821190426.GD97484@dan.emsphone.com>
References: <5.1.1.6.2.20020821204121.02ad7008@194.184.65.4>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <5.1.1.6.2.20020821204121.02ad7008@194.184.65.4>
X-OS: FreeBSD 5.0-CURRENT
X-message-flag: Outlook Error
User-Agent: Mutt/1.5.1i
Sender: owner-freebsd-questions@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-questions.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-questions>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-questions>
X-Loop: FreeBSD.ORG

In the last episode (Aug 21), Gianmarco Giovannelli said:
> Hi a friend of mine involved in a porting project.
> He has asking me something about socket and more I am not able to answer  
> :-)
> 
> Thanks for your attention...
> 
> --- begin ---
> 
> [...]
> that are familiar with "low-level-TCP/IP" coding.
> plz help
> 
> following problem:
> I don't know how to get an errorcode in case of socket-operation failed 
> (send/recv)
> in windows it goes like this
> 
> e.g
> res = send(....);
> if (res==SOCKET_ERROR)
> {
> err = WSAGetLastError();
> if (err==....) ...;
> }
> 
> but how to do this in linux/UNIX/BSD ?
> what's the equivalent of WSAGetLastError ?

On Unix, the send function returns -1, and the error is stored in the
global 'errno' variable.  "man errno" for more information.

-- 
	Dan Nelson
	dnelson@allantgroup.com

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message