From owner-freebsd-hackers@FreeBSD.ORG Fri Feb 20 04:41:17 2015 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id EB0F9A38; Fri, 20 Feb 2015 04:41:17 +0000 (UTC) Received: from mail-pa0-x231.google.com (mail-pa0-x231.google.com [IPv6:2607:f8b0:400e:c03::231]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B2EEACC9; Fri, 20 Feb 2015 04:41:17 +0000 (UTC) Received: by pabkx10 with SMTP id kx10so5181085pab.0; Thu, 19 Feb 2015 20:41:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=pvDSQd//5sQ0oPPoMD8W7U9N56x12px9CcXwtM2DHSk=; b=hSujBTI8o73njbXWPXwCehsfswyi8Ne2eJ0PaOE3Swx0/Sl5v9jjKLun0Z5CDlGUJE ajR3bG5MXu1cduEUK4KDdF/uMFRKYB6JeCxaZPe2cVQf8k7gh2PBd+HoHQ+c8C8GxW2S RNM81tElBGtk3lMZA7cX/kbMI3WWYLP3xvn4hbpZ/tRZOu3BrZuXHkNpqQxLbXXrZijL 2Vdfk8z5fykLjtXFpO0EjI+0NrP9v/mGqb8euos8ISsIDi01ic49zvfKwYnZCsQ9w8oX jgkyjpTolq4DQfdeAT8qbLaQfJO0AlfdFpru7Zr7KhNSKi4s0nh3a68fbejXLf8VHaQh Lb/A== MIME-Version: 1.0 X-Received: by 10.68.138.194 with SMTP id qs2mr13805315pbb.8.1424407277239; Thu, 19 Feb 2015 20:41:17 -0800 (PST) Sender: kob6558@gmail.com Received: by 10.67.30.198 with HTTP; Thu, 19 Feb 2015 20:41:17 -0800 (PST) In-Reply-To: References: <54E5232F.3060409@delphij.net> <54E59BF7.40207@freebsd.org> Date: Thu, 19 Feb 2015 20:41:17 -0800 X-Google-Sender-Auth: nC51RhhOBGPZZtoum7Mh7yty46c Message-ID: Subject: Re: default pager (csh) From: Kevin Oberman To: Warren Block X-Mailman-Approved-At: Fri, 20 Feb 2015 13:14:24 +0000 Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: Davide Italiano , FreeBSD Hackers , freebsd-current , Xin LI X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Feb 2015 04:41:18 -0000 On Thu, Feb 19, 2015 at 7:45 PM, Kevin Oberman wrote: > On Thu, Feb 19, 2015 at 5:10 PM, Warren Block wrote: > >> On Thu, 19 Feb 2015, Julian Elischer wrote: >> >> On 2/18/15 3:41 PM, Xin Li wrote: >>> >>>> >>>> The _only_ reason that I can think of is that more(1) does not clear >>>> screen for certain terminals (done with 'ti' and 'te' sequences), >>>> while less(1) when running as less does. >>>> >>>> The less(1) behavior can be annoying to some people (sometimes even >>>> myself when using less to show contents of a file and ^Z to paste >>>> them), and unfortunately quite a few of them also happen to be the >>>> more vocal ones when it comes to a change. >>>> >>> >>> I find that behaviour infuriating >>> >>> I page down to a place to get some text on the screen to use as a >>> reference, then exit to run a command with that information, and *bam* the >>> info I wanted to use has gone away. >>> >> >> It doesn't do that on csh. Or maybe I figured out how to prevent it long >> ago and forgot, but all I use is this: >> >> setenv PAGER "less -RS" >> > > You probably did what I used to do. Modify the termcaps/terminfo to > eliminate this behavior. See Exorcising the Evil Alternate Screen > . > > In the past, FreeBSD disabled this by default. It was changed several > years ago, but you can change it back as per the above referenced article. > > Well, I just looked at this and it looks like FreeBSD is using termcap, not terminfo. So you can "fix" this by defining TERM to a version of xterm that does not define alternate screen. I use xterm which, rather surprisingly, does not define ti or te. Neither do any of the xterm variants that I can find in termcap. (N.B. I am NOT running xterm. I am using mate-terminal, but it still works.) rxvt variants do define them, as do a great many others. Take a look at /usr/share/misc/termcap. Just remember that editing it does nothing until termcap.db is rebuilt. -- Kevin Oberman, Network Engineer, Retired E-mail: rkoberman@gmail.com