Date: Thu, 8 Jul 1999 21:10:18 -0400 (EDT)
Message-Id: <199907090110.VAA25062@indy.delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: djgpp AT delorie DOT com
In-reply-to: <Pine.UW2.3.95.990709004521.28688A-100000@bryggen.bgnett.no>
	(message from Gisle Vanem on Fri, 9 Jul 1999 00:45:55 +0200 (MET DST))
Subject: Re: fdopen() and FSEXT'ensions
Reply-To: djgpp AT delorie DOT com
X-Mailing-List: djgpp AT delorie DOT com
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Precedence: bulk


> I've made an FSEXT'ension handler for network socket I/O.
> Now I which to tie a socket to a 'FILE*' in order to use fgets(),
> fprintf() etc. with the sockets. But looking at fdopen() or setmode(),
> FSEXT'ension handlers aren't called. I would think that my handler
> would get an '__FSEXT_open' command, but it never does. Is this
> intentional or an oversight?

That's just the way fdopen() works.  It expects you to pass it an
*already* opened file descriptor.  In your case, the socket() call
needs to not only set the fsext function, but open the fd as well
(with __FSEXT_alloc_fd) (in fact, the docs for __FSEXT_alloc_fd have
an example of implementing socket()!)

http://www.delorie.com/djgpp/doc/libc-2.02/libc_315.html