Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!sdd.hp.com!ucsd!ucbvax!bloom-beacon!eru!luth!sunic!isgate!krafla!bergur
From: bergur@kerfi.hi.is (Bergur Thorisson)
Newsgroups: comp.sys.hp
Subject: O_NDELAY doesn't seem to work on sockets in HP-UX 7.0
Keywords: sockets nonblocking 7.0
Message-ID: <2092@krafla.rhi.hi.is>
Date: 23 Aug 90 18:22:36 GMT
Sender: usenet@rhi.hi.is
Distribution: comp
Lines: 23

I am using sockets on an HP-9000/360 running hp-ux 7.0 and need reads to be
non-blocking which, for the life of me, does not seem to work.

After initializing the socket I use:
	if( (fcntl( s, F_GETFL, flag)) == -1 )
    		WriteErrLog("SiggiVar uti"); 
	else{
    		flag |= O_NDELAY;
    		if( (fcntl( s, F_SETFL, flag )) == -1 )
      			WriteErrLog("SiggiVar uti lengi"); 
	}

And then the read call looks like this:
      len = recv(s, buf, 16, 0);
But the read blocks.

Is there something I am getting wrong here or is this a bug and if so is there
a workaround.  HP has said 'gee I dunno know use select' but I don't 
find that an acceptable answer unless that is the only one.

Bergur Thorisson
Engineering Research Institute
Univerisity of Iceland -- Reykjavik