用户密码过期通知

#!/bin/ksh

let DDD=`date +%s`/86400
let WARN=83
let EXP=90
echo `hostname` user password expire status checked on `date` >/tmp/expire_user
admin="[e-mail]"

while read USER
do
    username=`echo $USER|awk -F ":" '{print $1}'`
    Passwd_Change_date=`echo $USER|awk -F ":" '{print $3}'`
    Passwd_length=`echo $USER|awk -F ":" '{print $5}'`
    let Pass_date=${DDD}-${Passwd_Change_date}
#    echo $username "password has been changed:" $Pass_date
    if  test ${Pass_date} -gt ${WARN}  && test ${Pass_date} -lt ${EXP}
    then
         let Expire_day=90-$Pass_date
         echo " UserID \"$username\" password will expire in $Expire_day days" >>/tmp/expire_user
    let mail=1
    fi

done < /etc/shadow

if test $mail -eq 1
then
cat /tmp/expire_user|mail -s "`hostname` user password expire status checked on `date`"  $admin

fi