X-Recipient: archive-cygwin@delorie.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: References: Date: Tue, 28 Jul 2009 13:27:15 +0200 Message-ID: Subject: Re: 1.7.0: read() blocking with VMIN = VTIME = 0 From: =?ISO-8859-1?Q?daniel_=E5kerud?= To: cygwin@cygwin.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com On Tue, Jul 28, 2009 at 1:00 PM, daniel =E5kerud 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