Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S272142AbTGYPMw (ORCPT ); Fri, 25 Jul 2003 11:12:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S272138AbTGYPMw (ORCPT ); Fri, 25 Jul 2003 11:12:52 -0400 Received: from mailhost.tue.nl ([131.155.2.7]:269 "EHLO mailhost.tue.nl") by vger.kernel.org with ESMTP id S272145AbTGYPMn (ORCPT ); Fri, 25 Jul 2003 11:12:43 -0400 Date: Fri, 25 Jul 2003 17:27:51 +0200 From: Andries Brouwer To: Andrew Barton Cc: linux-kernel@vger.kernel.org Subject: Re: forkpty with streams Message-ID: <20030725152751.GA606@win.tue.nl> References: <1059089316.8596.14.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1059089316.8596.14.camel@localhost> User-Agent: Mutt/1.3.25i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 979 Lines: 31 On Thu, Jul 24, 2003 at 11:28:36PM +0000, Andrew Barton wrote: > I've got the 2.4 kernel, and I'm trying to use the forkpty() system call forkpty is not a system call > with the standard I/O stream functions. The calls to forkpty() and > fdopen() and fprintf() all return successfully, but the data never seems > to get to the child process. > pid = forkpty (&fd, 0, 0, 0); > if (pid == 0) { > execlp ("sh", "sh", (void *)0); > } else { > F = fdopen (fd, "w"); > fprintf (F, "exit\n"); > fflush (F); > wait (0); > } Let me see. Your sh gets input from this pseudotty and sends its output there again. But you never read that filedescriptor. No doubt things will improve if you let the parent read from fd. Andries - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/