X-Recipient: archive-cygwin AT delorie DOT com X-Spam-Check-By: sourceware.org Date: Thu, 22 Jan 2009 17:04:23 -0500 From: Christopher Faylor To: cygwin AT cygwin DOT com Subject: Re: Signal handling in WIN32 console programs Message-ID: <20090122220422.GA19936@ednor.casa.cgf.cx> Reply-To: cygwin AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com References: <20090119164151 DOT GA28574 AT certicom DOT com> <4978EBF0 DOT 3090104 AT gmail DOT com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4978EBF0.3090104@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 22, 2009 at 09:58:08PM +0000, Andy Koppe wrote: > avadekar AT certicom DOT com wrote: >>My WIN32 app is compiled under vc7 and uses signal() to trap SIGINT, >>SIGABRT and SIGTERM. If I run the application under console2 or a >>native terminal, pressing ^C triggers the handler and the application >>stops programmatically due to a state change made by the handler. When >>I do the same under rxvt (not the X based one) or minTTY, the ^C stops >>the process without the signal handler executing. Similarly, even when >>run from the native console, kill (-INT, -ABRT, -TERM) causes the >>application to end without the handler catching the signal. So I >>wonder if the native console passes the character to the process >>directly whereas the minTTY/rxvt shells interpret it and send a signal >>that the native app doesn't really understand properly. > >MinTTY and rxvt do not interpret the ^C keypress in any special way. >They simply write a ^C (0x03) character to the child process' pty. The >pty driver may translate that into a signal depending on the pty's line >settings (as shown by stty). Sorry I don't know how ^C is processed in >a Windows console or why the behaviour would be different with ptys. The operative term here is, once again, "Windows Console". A pure Windows program running in MinTTY or rxvt does not have a windows console and so won't see the type of SIGINT that the windows console generates. 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/