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 Date: Wed, 28 Feb 2001 18:56:58 -0500 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: spawn hangs for non-Cygwin programs Message-ID: <20010228185658.I5603@redhat.com> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <3A9D6C7A.8E6A52FF@tensilica.com> <20010228184732.G5603@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.11i In-Reply-To: <20010228184732.G5603@redhat.com>; from cgf@redhat.com on Wed, Feb 28, 2001 at 06:47:32PM -0500 On Wed, Feb 28, 2001 at 06:47:32PM -0500, Christopher Faylor wrote: >On Wed, Feb 28, 2001 at 01:24:10PM -0800, Bob Wilson wrote: >>I have a Cygwin program that contains the following call to invoke a >>child process: >> >> pid = spawnvp((int)_P_NOWAIT, argv[0], argv); >> >>Sometime between Cygwin 1.1.4 and 1.1.8 it seems to have stopped >>working. If the child is another Cygwin program, then everything is >>fine. If the child was compiled with -mno-cygwin, however, the spawnvp >>call never returns (as if I hadn't specified _P_NOWAIT). >> >>Is this supposed to work? > >Yes. Actually, on reflection, this is working as designed, unfortunately. spawn relies on some synchronization with the cygwin process now and if the process is not a cygwin process, the synchronization never happens. So, spawn waits for the program to terminate. cgf -- Want to unsubscribe from this list? Check out: http://cygwin.com/ml/#unsubscribe-simple