From owner-freebsd-stable@FreeBSD.ORG  Mon Jul 15 04:45:26 2013
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id 648E51F2
 for <freebsd-stable@FreeBSD.org>; Mon, 15 Jul 2013 04:45:26 +0000 (UTC)
 (envelope-from eugen@grosbein.net)
Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13::5])
 by mx1.freebsd.org (Postfix) with ESMTP id 16A047F1
 for <freebsd-stable@FreeBSD.org>; Mon, 15 Jul 2013 04:45:24 +0000 (UTC)
Received: from eg.sd.rdtc.ru (localhost [127.0.0.1])
 by eg.sd.rdtc.ru (8.14.7/8.14.7) with ESMTP id r6F4jLLp021170;
 Mon, 15 Jul 2013 11:45:21 +0700 (NOVT)
 (envelope-from eugen@grosbein.net)
Message-ID: <51E37E5C.5020301@grosbein.net>
Date: Mon, 15 Jul 2013 11:45:16 +0700
From: Eugene Grosbein <eugen@grosbein.net>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:17.0) Gecko/20130415 Thunderbird/17.0.5
MIME-Version: 1.0
To: Jilles Tjoelker <jilles@stack.nl>
Subject: Re: script(1), cfmakeraw() and Ctrl-Z
References: <51E2DC6B.2090605@grosbein.net> <20130714213734.GB30708@stack.nl>
In-Reply-To: <20130714213734.GB30708@stack.nl>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: FreeBSD Stable <freebsd-stable@FreeBSD.org>
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 15 Jul 2013 04:45:26 -0000

On 15.07.2013 04:37, Jilles Tjoelker wrote:
> On Mon, Jul 15, 2013 at 12:14:19AM +0700, Eugene Grosbein wrote:
>> I've noted that commands like "script -qa /tmp/log sleep 100"
>> cannot be suspended with Ctrl-Z keys. The reason is call to cfmakeraw()
>> in script.c - if I comment it out, Ctrl-Z starts to work as expected.
> 
>> portupgrade uses script(1) so build/install process cannot be suspended too.
>> (I'm building libreoffice-4.04 now)
> 
>> The function cfmakeraw() is used since CVS revision 1.1 when script
>> was imported with other "BSD 4.4 Lite Usr.bin Sources".
> 
>> Is cfmakeraw() really needed?
> 
> The cfmakeraw() call ensures that the processes running within script
> get all control characters. For example, you can suspend a job in the
> inner shell using Ctrl+Z. This indeed makes it impossible to suspend
> script itself.

Is it possible to achieve same effect of passing other control characters but Ctrl-Z?
So, it would be possible suspend long-running portupgrade.

Eugene Grosbein