Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!att!att!westmark!mole-end!mat
From: mat@mole-end.UUCP (Mark A Terribile)
Newsgroups: comp.lang.c
Subject: Re: MORE/PAGING routine needed ...
Summary: If you use  more ...
Keywords: paging routine
Message-ID: <452@mole-end.UUCP>
Date: 9 Dec 90 07:21:42 GMT
References: <1244@eci.UUCP> <1990Nov12.181848.10371@ccu.umanitoba.ca> <1584@travis.csd.harris.com>
Distribution: usa
Organization: mole-end--private system.  admin: mole-end!newtnews
Lines: 24

> >>MORE is quite a powerful pager, ...
 
> I had to solve the "pager" problem a few months ago. Basically - if you
> want to have MORE as your pager (and you are on Unix) than you can do
> this using popen(3S) and pclose(3S). Just tell popen the name of the 
> command you want to write to and it will return you the file-pointer
> to use for your output.

Let me encourage those who would code something like this for themselves--
be sure that you use the pager specified by  $PAGER  if such there be.  This
code does, to its credit.

You can probably simplify the code some with something like

	popen( " [ \"$PAGER\" ] && ( $PAGER || true ) || /usr/ucb/more ", w )

which does much of the testing of cases, at the expense of execution time.
If you aren't going to do it often, or if the user is going to spend a fair
amount of time in the file, it's probably OK, and it allows you to use the
shell instead of programming all the cases yourself.
-- 

 (This man's opinions are his own.)
 From mole-end				Mark Terribile