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Date: Mon, 18 Nov 1996 16:02:11 +0900 (JST)
From: Michael Hancock <michaelh@cet.co.jp>
To: Bill Fenner <fenner@parc.xerox.com>
cc: Terry Lambert <terry@lambert.org>, scrappy@ki.net, jdp@polstra.com,
        hackers@FreeBSD.org
Subject: Re: Sockets question... 
In-Reply-To: <96Nov15.113305pst.177557@crevenia.parc.xerox.com>
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On Fri, 15 Nov 1996, Bill Fenner wrote:

> 4.4BSD introduced the MSG_WAITALL flag, so if you use recv() or any of its
> friends you can ask for your whole request to be performed.  This is, of
> course, not portable, and MSG_WAITALL won't even do the trick if your
> request is larger than the socket's high water mark (e.g. SO_RECVBUF).
> 

UnixWare 2.1.1 now supports this, I'll have to check Solaris.  Maybe it's
more portable than you think. 

>From the man pages ...

            MSG_WAITALL
                      Block until the full amount of requested data can be
                      returned.  May return a smaller amount of data if a
                      signal is caught,the connection is terminated or an
                      error is pending for the socket.


Regards,


Mike Hancock