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From: leh@atlantis.cis.ufl.edu (Les Hill)
Newsgroups: comp.unix.programmer
Subject: Re: IPC/socket QUESTION...
Keywords: IPC, socket, accept(), blocking
Message-ID: <26803@uflorida.cis.ufl.EDU>
Date: 8 Feb 91 20:53:07 GMT
References: <1991Feb8.150520.5678@en.ecn.purdue.edu>
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Reply-To: leh@atlantis.cis.ufl.edu (Les Hill)
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Organization: U of Florida. Computer Science Dept.
Lines: 23

In article <1991Feb8.150520.5678@en.ecn.purdue.edu>, hoff@en.ecn.purdue.edu (Michael Hoefflinger) writes:
|>    --> The question is how do I make this accept() call NON-BLOCKING?  In
|>        other words, if there are no clients waiting to connect, I would
|>        like accept() to return with errno=EWOULDBLOCK instead of blocking
|>        until someone wants to connect.
|> Michael Hoefflinger
|> uxg@fugue.cc.purdue.edu  (NeXT)

--> The answer is to use fcntl() (or perhaps ioctl() on your machine) and set
	the socket's descriptor to non-blocking.  Under SunOS4.1.1 I would do
	either
		rc = fcntl(socket,F_SETFL,O_NDELAY);
	or
		rc = fcntl(socket,F_SETFL,FNDELAY);

	both of which will do the Right Thing (tm).

Les Hill
-- 
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