PATH=/bin:/usr/bin tmp=/tmp/cal$$ trap "rm $tmp /tmp/cal2$$; exit" 0 1 2 13 15 /usr/lib/calendar >$tmp case $# in 0) egrep -f $tmp calendar;; *) sed ' s/\([^:]*\):.*:\(.*\):[^:]*$/y=\2 z=\1/ ' /etc/passwd \ | while read x do eval $x if test -r $y/calendar; then egrep -f $tmp $y/calendar 2>/dev/null > /tmp/cal2$$ if [ -s /tmp/cal2$$ ] ; then < /tmp/cal2$$ mail $z fi fi done esac