How to list user password expiry date

#!/bin/ksh

check_auth()

{

if [[ `whoami` != "root" ]]

then

clear

echo "\n\n\n\t W A R N I N G ! ! !"

echo "\n\n\t You will not be able to execute this script as regular user !"

echo "\n\t Please su to root and then run the script. "

exit 1

fi

}

single_user()

{

chk_valid=`cat /etc/passwd|awk -F: '{print $1}'|grep -i $inp`

if [[ -z $chk_valid ]];then

echo "\n\n$inp is not a valid user on this system ... please try again\n\n"

exit 1

fi

mxage=`lsuser -a maxage $inp|awk -F = '{print $2}'`

maxage_in_sec=`expr $mxage \* 604800`

lstupd=`grep -p $inp /etc/security/passwd|grep -i lastupdate|awk '{print $3}'`

if [[ ! -z $lstupd ]];then

expired_sec=`expr $lstupd \+ $maxage_in_sec`

expired_date=`perl -e "print scalar localtime($expired_sec)"`

todays_in_sec=`date +%s`

if [[ $expired_sec -lt $todays_in_sec ]];then

echo "\n\nPassword for $inp \texpired on $expired_date\n\n"

else

echo "\n\nPassword for $inp \twill expire on $expired_date\n\n"

fi

else

continue

fi

}

all_users()

{

for i in `cat /etc/passwd |awk -F: '{print $1}'`

do

mxage=`lsuser -a maxage $i|awk -F = '{print $2}'`

maxage_in_sec=`expr $mxage \* 604800`

lstupd=`grep -p $i /etc/security/passwd|grep -i lastupdate|awk '{print $3}'`

if [[ ! -z $lstupd ]];then

expired_sec=`expr $lstupd \+ $maxage_in_sec`

expired_date=`perl -e "print scalar localtime($expired_sec)"`

todays_in_sec=`date +%s`

if [[ $expired_sec -lt $todays_in_sec ]];then

echo "\nPassword for $i \texpired on $expired_date"

else

echo "\nPassword for $i \twill expire on $expired_date"

fi

else

# echo "$i not valid"

continue

fi

done

}

check_auth

inp=$1

if [ -z "$inp" ] ; then

all_users

else

single_user

fi