From: wfire AT pimpz DOT darkillustrated DOT org (Holister)
Subject: Re: Non blocking I/O
17 May 1997 20:54:07 -0700
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On Sat, 17 May 1997, Mike Bernson wrote:

> I am trying to set the the non-block read or write for a 
> tcp-socket.
> 
> I do the following fcntl(fd, SETFL, O_NONBLOCK) which does not
> return any errors. Then a do a read on the fd and it blocks. 
> 
> I need a way to do none blocking reads or find out how much data
> is pending so I can do the read for just that amount of data.
> 
> The same would be nice for writes but not needed.

select() will tell you IF data is pending, which is good... fctl() 
doesn't work in linux for setting non_blocking on tcp sockets either...so 
don't feel bad :)
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