delorie.com/archives/browse.cgi | search |
X-Spam-Check-By: | sourceware.org |
MIME-Version: | 1.0 |
Subject: | RE: read() blocking and TIOCINQ |
Date: | Tue, 22 Aug 2006 10:33:54 -0400 |
Message-ID: | <C874DBE9D30B584587F8CD0EC34DA8BE025D6967@EX00.idirect.net> |
In-Reply-To: | <44EABC07.3010305@esrf.fr> |
From: | "Nellis, Kenneth" <knellis AT idirect DOT net> |
To: | <cygwin AT cygwin DOT com> |
Mailing-List: | contact cygwin-help AT cygwin DOT com; run by ezmlm |
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 |
X-MIME-Autoconverted: | from quoted-printable to 8bit by delorie.com id k7MEaD80007408 |
The value of errno might give you a clue. --Ken Nellis -----Original Message----- From: Ernesto Paiser [mailto:paiser at esrf dot fr] Sent: Tuesday, August 22, 2006 4:11 AM To: cygwin at cygwin dot com Subject: read() blocking and TIOCINQ Hello Corinna, I have problems with read() function blocking and waiting for characters on serial line with cygwin: Here are some code fragments: ======================================================== fd = open(sl, O_RDWR | O_NOCTTY | O_NONBLOCK | O_NDELAY) newpio.c_cflag = brate | CS8 | CLOCAL | CREAD; newpio.c_iflag = IGNPAR | ICRNL; newpio.c_oflag = 0; newpio.c_lflag = 0; newpio.c_cc[VTIME] = 1; newpio.c_cc[VMIN] = 0; ... n = ioctl(fd, TIOCINQ, &n); //It gives me an error (return -1) why??!!! and n = read(fd, buffer, 1); <<< HERE IS BLOCKING!!! ======================================================== TIOCINQ is working on CYGWIN, Is there another way to solve this problem??? Thank you in advance, Ernesto. -- Ernesto PAISER ____________________ paiser AT esrf DOT fr E.S.R.F. - European Synchrotron Radiation Facility 6 rue Jules Horowitz BP 220 Grenoble CEDEX France phone +33 4 76 88 23 48 fax +33 4 76 88 23 25 -- 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/
webmaster | delorie software privacy |
Copyright © 2019 by DJ Delorie | Updated Jul 2019 |