#!/bin/ksh
#Output the login name of everyone in the class who owns no file in
#the directory ~mm64/public_html/INFO1-CE9545/homework.
#Sample use: delinquent

~mm64/bin/roster 45 | sort > ~/inclass

ls -l ~mm64/public_html/INFO1-CE9545/homework | tail +2 |
	awk '{print $3}' | sort | uniq > ~/didhomework

comm -23 ~/inclass ~/didhomework
rm ~/inclass ~/didhomework