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From: andrewg@microlise.co.uk (Andrew Gierth)
Newsgroups: comp.unix.programmer,comp.unix.bsd,comp.unix.questions
Subject: Re: Connection return value
Followup-To: comp.unix.programmer
Date: 25 Sep 1996 20:52:57 +0100
Organization: Microlise Engineering Ltd.
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Message-ID: <ufsp86l6cm.fsf@zen.microlise.co.uk>
References: <32493418.1604@cod.nosc.mil>
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In-reply-to: Grace Huynh's message of Wed, 25 Sep 1996 13:31:04 GMT
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>>>>> "Grace" == Grace Huynh <gpham@cod.nosc.mil> writes:
Grace> When I go through the socket programming book, I couldn't find
Grace> anything that mention about return a value equal exactly 0.
Grace> The book only covers > 0 or <0, but nothing about equal to 0.
Grace> So please confirm this with me.
Grace> If connect() system call return a value < 0 then connection is not
Grace> success.
Grace> If connect() system call return a value > 0 then the socket
Grace> successully connect
Grace> What if connect() return a value == 0? And this is my case.
Grace> To me, It's means my connection is success correct?
connect() should not return values >0. The expected result is either 0,
indicating success, or -1, indicating failure.
The best test to use is probably
if (connect(sock, &addr, sizeof(addr)) < 0)
{
...handle failure...
}
Hope this helps
(There are examples at http://www.auroraonline.com/sock-faq that you might
find helpful.)
--
Andrew Gierth (andrewg@microlise.co.uk)
"Ceterum censeo Microsoftam delendam esse" - Alain Knaff in nanam