[ILUG] $yesterday

[Baldwin_James at emc.com]

All,

Without going OTT, can anyone think of a way of echoing out a $yesterday
variable (i.e. yesterdays date! :P )?
Has the date binary got some fancy footwork to do this already ? Running
*cough* Solaris 2.6 :(

The only way I can think of is this nasty piece of self-made artwork


#!/bin/ksh

set -A DAYS Sat Sun Mon Tue Wed Thu Fri Sat
set -A MONTHS Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
YESTERDAY=$((`date +%d` -1))
MONTH=`date +%m`
YEAR=`date +%Y`
NDAY=`date +%u`
WEEKDAY=${DAYS[`date +%u`]}
if [ $YESTERDAY -eq "0" ]
then
	MONTH=$((MONTH-1))
	if [ $MONTH -eq "0" ]
	then
		MONTH=12
		YEAR=$((YEAR-1))
	fi
set `cal $MONTH $YEAR`
shift $(($# - 1))
YESTERDAY=$1
fi
TMONTH=${MONTHS[MONTH]}


Cheers,
J.