#!/bin/ksh
get_one_day_before_specified_date()
{
# get the command line input (date,month & year)
month=$1
year=$2
 
# if it is the first month of the year
if [ $month -eq 01 ]
then
# make the month as 12
month=12
 
# deduct the year by one
year=`expr $year - 1`
else
# deduct the month by one
month=`expr $month - 1`
fi
 
typeset -Z2 month=${month}
 
echo $year$month
}
if [ $# -ne 2 ]
then
m=`date +%m`
y=`date +%Y`
else
m=$1
y=$2
fi
 
LAST_Month=`get_one_day_before_specified_date $m $y`
now_Month=`date "+%Y%m"`
 
if swlist -l fileset -a install_date|awk '{print $2}'|grep 2017|sort -nr|uniq|egrep "$LAST_Month|$now_Month" >/dev/null 2>&1
then
echo "OK"
else
echo "NOK"
fi