From: Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: libsocket: difference between O_NONBLOCK and FIONBIO?
Date: Tue, 03 Oct 2000 19:21:25 +0100
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CC: Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hello.

Peter Remmers wrote:
> > In the libsocket the fcntl() support actually goes through the ioctl()
> > code. fcntl(..., O_NONBLOCK) traverses the same code path as
> > ioctl(..., FIONBIO, ...). So they have the same effect.
> 
> hmm, okay. In your particular implementation of the BSD sockets API
> it's the same. But what about real unixes?

I know they both work on Linux. Clearly *BSD are the same. A similar set
of calls exists on Windows - fcntlsocket() and ioctlsocket() (it's been a
while since I programmed for Winsock under Windows)?

I can't comment on other operating systems, but I think anything that
supports the BSD socket interface should support both fcntl() and ioctl().
They're both not exactly standard calls, ioctl() particularly.

Which operating systems are you worried about?

> > Would things be clearer if the libsocket docs used 'like' instead of
> > 'similar'? How do you think the docs could be improved?
> 
> That would help a lot. Actually, what you just wrote would make it
> very clear :-)

OK, I'll add a note for the next release.

Thanks, bye,

-- 
Richard Dawe
[ mailto:richdawe AT bigfoot DOT com | http://www.bigfoot.com/~richdawe/ ]