Date: Wed, 21 Aug 2002 15:49:34 -0400 (EDT) From: John Bleichert <syborg@stny.rr.com> To: Gianmarco Giovannelli <gmarco@giovannelli.it> Cc: questions@FreeBSD.ORG Subject: Re: Porting from win32 to UNIX: Sockets Message-ID: <Pine.LNX.4.44.0208211547160.17257-100000@janeway.vonbek.dhs.org> In-Reply-To: <5.1.1.6.2.20020821204121.02ad7008@194.184.65.4>
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On Wed, 21 Aug 2002, Gianmarco Giovannelli wrote:
> Date: Wed, 21 Aug 2002 20:44:27 +0200
> From: Gianmarco Giovannelli <gmarco@giovannelli.it>
> To: questions@FreeBSD.ORG
> Subject: Porting from win32 to UNIX: Sockets
>
> 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 ?
>
> furthermore I need to know the errorcodes of
> "wouldblock" and "connreset"
>
>
> --- end ---
>
> Best Regards,
> Gianmarco Giovannelli , "Unix expert since yesterday"
Errors are stored in the errno(3) variable. To read this, try something
like:
if ((br= read(s,buf,n-bcount)) > 0) {
// do something
} else {
printf("error returned: %s\n", strerror(errno));
}
check out the errno(3) and strerror(3) man pages.
JB
/*
* John Bleichert
* syborg@stny.rr.com
* http://vonbek.dhs.org/latest.jpg
*/
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