#!/bin/csh -f
set path = (/bin /usr/bin /usr/ucb)
     # avoid running user's programs with overlapping names

set sys_msg_file = /th/a/help/users-aid
set last_time_file=$HOME/.read_sys_msg_time
	# files modification time is time last read sys msg

set qualifier
if (-f $last_time_file) set qualifier = '-newer '$last_time_file

touch $last_time_file.tmp  # keep track of time before reading msg

set unread = `find $sys_msg_file $qualifier -print`
if ("$unread" != "") more $unread

mv $last_time_file.tmp $last_time_file # update time of $last_time_file