X-Recipient: archive-cygwin AT delorie DOT com X-Spam-Check-By: sourceware.org Date: Thu, 15 Jan 2009 00:59:17 -0500 From: Christopher Faylor To: cygwin AT cygwin DOT com Subject: Re: console vs pty (was: Re: First Pass at mintty documentation; etc.) Message-ID: <20090115055917.GA19035@ednor.casa.cgf.cx> Reply-To: cygwin AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com References: <496A5EDE DOT 9010204 AT veritech DOT com> <496A7038 DOT 402 AT gmail DOT com> <496B7C25 DOT 3090705 AT veritech DOT com> <496E528D DOT 1090801 AT gmail DOT com> <496E7E4F DOT 6060706 AT gmail DOT com> <496ECD29 DOT 8010804 AT gmail DOT com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <496ECD29.8010804@gmail.com> User-Agent: Mutt/1.5.16 (2007-06-09) Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Note-from-DJ: This may be spam On Thu, Jan 15, 2009 at 05:44:09AM +0000, Andy Koppe wrote: >Chuck Wilson wrote: >>"full screen" or "DOS" is a red herring. Any program that does >>something like the following, if compiled as a native program, won't >>work in rxvt (or MinTTY, or cygwin/cmd-shell-with-CYGWIN=tty): >> >> #include >> main() { >> int c; >> while ((c = getc(stdin)) != EOF) fputc(c, stdout); >> } >> >>The thing is, THIS program works as part of a pipeline even when >>compiled as a native program -- but it breaks if you try to use it >>interactively within rxvt/MinTTY/etc. A cygwin-compiled version works >>in all cases. > >I see, thanks for explaining that. What exactly does happen when >calling read() that means that pty input doesn't reach the program? It's buffered differently. MSVCRT thinks that Cygwin's ptys are pipes so it buffers the input like a pipe rather than a terminal. cgf -- 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/