#!/bin/sh
#
# cal_today - if user doesn't give an argument, put > < around today's 
# date on this month's calendar

case $# in
0) set x `date`   # Get the current day of the month into $4
   /usr/bin/cal |
   # Put > < around $4 (shell expands $4 inside the doublequotes)
   sed -e 's/^/ /' -e "s/ $4$/>$4</" -e "s/ $4 />$4</"
   ;;
# If arguments are given, just run the normal cal
*) /usr/bin/cal "$@" ;;
esac