X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Tue, 11 Oct 2011 19:17:54 +0200 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Problem redirecting stderr to pipe in subprocess Message-ID: <20111011171754.GA2172@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <4E906DD1.50107@cornell.edu> <4E90C308.9090508@cornell.edu> <20111009235815.GA18203@ednor.casa.cgf.cx> <20111010220608.GA1568@ednor.casa.cgf.cx> <20111011121742.GC21554@calimero.vinschen.de> <20111011170834.GA4522@ednor.casa.cgf.cx> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20111011170834.GA4522@ednor.casa.cgf.cx> User-Agent: Mutt/1.5.21 (2010-09-15) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: 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 On Oct 11 13:08, Christopher Faylor wrote: > On Tue, Oct 11, 2011 at 02:17:42PM +0200, Corinna Vinschen wrote: > >On Oct 10 18:06, Christopher Faylor wrote: > >> When the tty layer in Cygwin was first developed, the model (either in > >> my head or in reality) was "If you don't have a tty and open a tty, that > >> becomes your controlling tty". But, apparently that model changed over > >> time to something more sensical where you have to explicitly use > >> ioctl(TIOCSCTTY) to set up a controlling terminal. > > > >I don't quite understand this. The "If you don't have a tty and open a tty, > >that becomes your controlling tty" is standard POSIX behaviour, isn't it? > >SUSv4 open writes: > > > > O_NOCTTY > > > > If set and path identifies a terminal device, open() shall not > > cause the terminal device to become the controlling terminal for > > the process. If path does not identify a terminal device, > > O_NOCTTY shall be ignored. > > > >The Linux man page contains basically the same. > > Check out the linux info page. It's more talkative. Uh, ok. Thanks for the pointer. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple