X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=-2.0 required=5.0 tests=BAYES_00,SARE_MSGID_LONG40,SPF_PASS
X-Spam-Check-By:	sourceware.org
MIME-Version:	1.0
In-Reply-To:	<b000da060907280400q3ad7d39awcdd3ff2514e987c4@mail.gmail.com>
References:	<b000da060907280400q3ad7d39awcdd3ff2514e987c4 AT mail DOT gmail DOT com>
Date:	Tue, 28 Jul 2009 13:27:15 +0200
Message-ID:	<b000da060907280427s16bf61ffice75f2dc0f317741@mail.gmail.com>
Subject:	Re: 1.7.0: read() blocking with VMIN = VTIME = 0
From:	=?ISO-8859-1?Q?daniel_=E5kerud?= <daniel DOT akerud AT gmail DOT com>
To:	cygwin AT cygwin DOT com
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Unsubscribe:	<mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
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

On Tue, Jul 28, 2009 at 1:00 PM, daniel =E5kerud<daniel DOT akerud AT gmail DOT com> w=
rote:
> With my example program below the read() is blocking even though
> canonical input is set and VMIN =3D VTIME =3D 0.

I mean non-canonical here. *ups*

> It is supposed to act in a non-blocking way.
>

And this is from the libc documentation:
http://www.gnu.org/s/libc/manual/html_node/Noncanonical-Input.html#Noncanon=
ical-Input

17.4.10 Noncanonical Input
...
Both MIN and TIME are zero.
In this case, read always returns immediately with as many characters
as are available in the queue, up to the number requested. If no input
is immediately available, read returns a value of zero.

BR/Daniel

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

- Raw text -