From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <315ec4b482e28037d3755647ba24145b@quintile.net>
From: "Steve Simon" <steve@quintile.net>
Date: Fri,  6 Jul 2007 22:58:33 +0100
To: 9fans@cse.psu.edu
Subject: Re: [9fans] implementing 9p read
In-Reply-To: <13426df10707060754j553a6a70v4d50633d3afe2917@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Topicbox-Message-UUID: 928caf1a-ead2-11e9-9d60-3106f5b1d025

> > You cannot do this, the usual idiom is that if read returns less
> > than the app expected this is treated as EOF.
> 
> Oh not, that's not at all true. Any program that behaves this way is
> broken. Unless I totally misunderstand your point.
> 

Ok,

You are probably right, its an assumption I have seen in code
in the past, though not in plan9:

	while((n = fread(buf, 1, sizeof(buf), fp)) != sizeof(buf))
		if(fwrite(buf, 1, n, out) != n)
			sysfatal("write failed");

I have always tried to code defensively around it when writing
fileservers by returning full buffers, it seems I have been
fleeing a mere spectre.

-Steve