Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762775AbYHFUR5 (ORCPT ); Wed, 6 Aug 2008 16:17:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758331AbYHFURd (ORCPT ); Wed, 6 Aug 2008 16:17:33 -0400 Received: from shadow.wildlava.net ([67.40.138.81]:38700 "EHLO shadow.wildlava.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754979AbYHFURb (ORCPT ); Wed, 6 Aug 2008 16:17:31 -0400 Message-ID: <489A06D9.1080600@skyrush.com> Date: Wed, 06 Aug 2008 14:17:29 -0600 From: Joe Peterson User-Agent: Thunderbird 2.0.0.16 (X11/20080727) MIME-Version: 1.0 To: Alan Cox CC: linux-kernel@vger.kernel.org Subject: Re: tty: ctrl-c not always echoed, especially under load References: <48977C96.2090005@skyrush.com> <20080805001129.72d06e60@lxorguk.ukuu.org.uk> In-Reply-To: <20080805001129.72d06e60@lxorguk.ukuu.org.uk> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1114 Lines: 31 Alan Cox wrote: > If the output buffer is full then echoed characters/^C etc will vanish the > way n_tty implements its buffering internally. It's always worked that > way. One more observation: In Linux, try this: # cat > foo hi^Sthere^Q ^D (in other words, during the cat into "foo", type "hi", hit ^S, then type "there", then hit ^Q, then, on the next line, ^D to end the file) Note that the "there" does not appear after hitting ^Q, but it does appear in the file. So the characters were accepted, but they were not echoed (not even saved for echo when the terminal is restarted). This behavior differs from that of FreeBSD (just tried it for fun - haven't tried other Unix's yet). I have noticed other times that the echo seems to get lost while the tty is stopped. Not sure if all this is related, but something seems amiss. Thoughts? Thanks, Joe -- 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/