X-Spam-Check-By: sourceware.org Subject: read() blocking and TIOCINQ Message-ID: <44EABC07.3010305@esrf.fr> Date: Tue, 22 Aug 2006 10:10:47 +0200 From: Ernesto Paiser Reply-To: paiser@esrf.fr User-Agent: Thunderbird 1.5.0.5 (Windows/20060719) MIME-Version: 1.0 To: cygwin@cygwin.com Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Status: Clean Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm 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 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@esrf.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/