:
##########################################################################
# Shellscript:	watch - watch the directory listing of a file
# Version    :	0.1 (beta)
# Author     :	Heiner Steven (heiner.steven@odn.de)
# Date       :	11/04/94
# Category   :	File Utilities
# SCCS-Id.   :	$Id: watch,v 1.1.1.1 1999/06/15 19:29:05 heiner Exp $
##########################################################################
# Description
#
##########################################################################

PN=`basename $0`			# program name
VER='0.1 (beta)'

SleepTime=2				# seconds to wait between ls
MaxTries=150				# only wait $MaxTries times

Usage () {
    echo "$PN - watch a directory entry, $VER (stv '94)
usage: $PN [-s] [-t sleeptime] [-n maxtries] file [...]
    -s  not output
    -t  wait sleeptime (default $SleepTime) seconds between listings
    -n  exit if file did not change in maxtries (default $MaxTries) tries
	(0=wait forever)" >&2
    exit 1
}

Msg () {
    for i
    do echo "$PN: $i" >&2
    done
}

Fatal () { Msg "$@"; exit 1; }

Silent=no

set -- `getopt 'hn:st:' "$@"` || Usage
while [ $# -gt 0 ]
do
    case "$1" in
	-s)	Silent=yes;;
	-n)	MaxTries="$2"; shift;;
	-t)	SleepTime="$2"; shift;;
	--)	shift; break;;
	-h)	Usage;;
	-*)	Usage;;
	*)	break;;			# First file name
    esac
    shift
done

[ $# -lt 1 ] && Usage

countdown=$MaxTries
while :
do
    Line=`ls -ldgt "$@" 2>&1`
    if [ "$Line" != "$OldLine" ]
    then
	[ "$Silent" = no ] && echo "$Line"
	OldLine="$Line"
	countdown=$MaxTries
    elif [ $MaxTries -gt 0 ]
    then
	countdown=`expr $countdown - 1`
	[ "$Silent" = no ] && echo "$countdown       
\c"
	[ ${countdown:=0} -le 0 ] && exit 0
    fi
    sleep $SleepTime
done