Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sources.redhat.com Delivered-To: mailing list cygwin@sources.redhat.com X-Envelope-Sender-Is: Andrej.Borsenkow@mow.siemens.ru (at relayer goliath.siemens.de) From: "Andrej Borsenkow" To: "Cygwin Mailing List" Subject: Possible bug with select and master side of pty Date: Wed, 8 Nov 2000 17:46:06 +0300 Message-ID: <000001c04992$9ff5e8c0$21c9ca95@mow.siemens.ru> MIME-Version: 1.0 Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 When polling master side of pseudo tty for reading, select is just using common function fhandler_pipe::select_read. This does not work when we do onlcr conversion (actually, always), read buffer of size 1 and are reading NL. In this case, first select returns readable descriptor (because there is real data in master-slave pipe) and first read returns CR. Second select does not think fd is readable because there is no more data in pipe; still, read from master side would return NL here. It _looks_ like adding fhandler_tty_master::select_read that is combination of fhandler_tty_common::select_read (when need_nl == 0) and fhandler_null::select_read (when need_nl != 0) should do the job. But I never programmed in C++ and do not trust myself to fully understand all these method interaction :( -andrej Have a nice DOS! B >> -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com