Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Date: Sun, 5 Dec 2004 12:43:36 -0500
From: Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: short fread(), but no ferror/feof
Message-ID: <20041205174336.GC21703@trixie.casa.cgf.cx>
Reply-To: cygwin AT cygwin DOT com
References: <Pine DOT GSO DOT 4 DOT 51L2 DOT 0412051701370 DOT 21199 AT koeberg DOT lysator DOT liu DOT se>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <Pine.GSO.4.51L2.0412051701370.21199@koeberg.lysator.liu.se>
User-Agent: Mutt/1.4.1i

On Sun, Dec 05, 2004 at 05:17:46PM +0100, Peter ?strand wrote:
>I've discovered that fread(ptr, size, nitems, stream) sometimes returns a
>value less than "nitems", but does not set feof() nor ferror(). As I
>understand, this is incorrect: All fread() documentation I've found
>confirms this. For example, IEEE Std 1003.1 says:
>
>"Upon successful completion, fread() shall return the number of elements
>successfully read which is less than nitems only if a read error or
>end-of-file is encountered."
>
>I've only noticed the problem when using fread() on a pipe, and when
>setting a (another) file descriptor in the same application in
>close-on-exec mode. The details are on http://python.org/sf/1071516. I've
>been using the latest Cygwin (as of 2004-12-04) on Windows 98.
>
>To me, this looks like a Cygwin bug. Any ideas?

A simple, compilable test case with results shown on both linux and
cygwin would prove your theory.

cgf

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/