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Path: utzoo!linus!philabs!cmcl2!seismo!mcvax!ukc!qtlon!flame!ubu!dpa
From: dpa@ubu.UUCP (David Angier)
Newsgroups: net.sources.bugs
Subject: Re: program to repetively display command on crt
Message-ID: <336@ubu.UUCP>
Date: Fri, 23-Nov-84 17:23:41 EST
Article-I.D.: ubu.336
Posted: Fri Nov 23 17:23:41 1984
Date-Received: Sun, 25-Nov-84 09:15:29 EST
Organization: Computer Science, Warwick University, UK
Lines: 40

[Munch..Hmm...Yuck...]

I was quite suprised to see a C program to display the output of a
shell command string every n seconds.  Surely this is an elementry
task in shell script.  I'm sure that this is one of the main uses
of shell script files.  It seems stupid to write such minor utilities
in C.
Here follows a quite adequate display program written in /bin/sh shell
script.  It could be shortened by making the syntax simpler or
removing checks for invalid syntax (half the program.)

-----------------------CUT-HERE-----------------------------------------------

SLEEP=5
if test $# = 0
then
	echo Usage: $0 [-seconds] command [command args]
	exit
fi
if expr $1 : '-'[0123456789]>/dev/null
then
	SLEEP=`echo $1|tail +2c`
	shift
fi
if test $# = 0
then
	echo Usage: $0 [-seconds] command [command args]
	exit
fi
while true
do
	clear
	$*
	sleep $SLEEP
done


Lets have no more silly C programs in net.sources.

		Dave (Maths @ Warwick University, UK)