[*** Listing 2 -- today program ***]

#!/bin/sh
#
#	today
#
#	Show current date, and previous/current/last calendars with
#	current day highlighted
#
#	Lawrence S Reznick -- May 2, 1992

date

NOW=`date '+%m'`
LAST=`expr $NOW - 1`
NEXT=`expr $NOW + 1`
YEAR=`date '+%Y'`
NEXTYEAR=$YEAR
LASTYEAR=$YEAR

if [ $NEXT -gt 12 ]
then
	NEXT=1
	NEXTYEAR=`expr $YEAR + 1`
fi

if [ $LAST -lt 1 ]
then
	LAST=12
	LASTYEAR=`expr $YEAR - 1`
fi

cal $LAST $LASTYEAR |
 awk '{printf("%-21s\n", $0)}' >$LAST.$$

cal |
 sed -e "s/^/ /" -e "s/$/ /" -e "s/ \(`date '+%e'`\) /\<\1\>/" |
 awk '{printf("%-21s\n", $0)}' >$NOW.$$

cal $NEXT $NEXTYEAR |
 awk '{printf("%-21s\n", $0)}' >$NEXT.$$

paste $LAST.$$ $NOW.$$ $NEXT.$$

rm *.$$


