Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!munnari!comp.vuw.ac.nz!duncan
From: duncan@comp.vuw.ac.nz (Duncan McEwan)
Newsgroups: comp.unix.wizards
Subject: Re: Pager in the shell
Message-ID: <13031@comp.vuw.ac.nz>
Date: Wed, 21-Oct-87 17:22:38 EDT
Article-I.D.: comp.13031
Posted: Wed Oct 21 17:22:38 1987
Date-Received: Sat, 24-Oct-87 20:40:44 EDT
References: <9779@brl-adm.ARPA> <1935@ttrdc.UUCP>
Reply-To: duncan@comp.vuw.ac.nz (Duncan McEwan)
Organization: Comp Sci, Victoria Univ, Wellington, New Zealand
Lines: 31
Summary: It has been done in the kernel

In article <1935@ttrdc.UUCP> levy@ttrdc.UUCP (Daniel R. Levy) writes:
>The only other remotely reasonable way you could get between a program's
>output and your terminal to paginate it is to kludge the terminal driver
>in the kernel so it would paginate in cooked mode but not in raw mode.
>(Has anyone been crazy enough to try this?)

Yep.  The Z8000 V7 based unix (I think done by Interactive Systems,
based on a port initially done at Berkeley) that runs on our old Onyx
machine has exactly this feature.

Typing

   stty page
   stty length 24

will cause the kernel to send a bell to your terminal, and suspend the process
after 24 lines have been output without an intervening read().  The feature
is disabled when using a program in raw or cbreak mode (I assume automatically
by the kernel, rather than every program that switches to raw or cbreak
having to turn it off).

I don't know about `crazy' either.  It seems the only logical place to
put such a feature if it's what you want.  Not that I ever used it - I
prefered the fuller functionality of "more", and I don't think anyone
would be crazy enough to try doing regular expression searches in the
tty driver :-)

Duncan

Domain: duncan@comp.vuw.ac.nz
Path:   ...!uunet!vuwcomp!duncan