Shell Programming and Scripting

 
#!/bin/ksh -x
#Author:Emmanuel Iroanya Jr
#Date:December 20th, 2012
#Purpose: The purpose of this is to check the Shadow table for the epoch value and warn the users / Email of Password Expiration  seven days in advance
ID=`id | cut -d ' ' -f 1`
if [[ "${ID}" != "uid=0(root)" ]]
then
   echo "You Need To Be Root To Run This Script, Please and Thank You"
   exit 1
fi
export Shadow=/etc/shadow
export EpochSh=`perl -e 'print time, "\n"'`
export Hostname=`hostname`
#Our SSE Email Address that will get notification
export Email="mygroup@mycompany.com"
for line in `cat $Shadow | grep adm`
do
 echo $line
done >passFile.txt
for i in `cat passFile.txt`
do
User=`echo $i |cut -d ':' -f 1`
MaxDay=`echo $i | cut -d ':' -f 5`
echo "$MaxDay"
Epoch=`echo $i |cut -d ':' -f 3`
echo "$Epoch"
Eval1=`expr $MaxDay + $Epoch`
Eval2=`expr $EpochSh / 86400`
Eval=`expr $Eval1 - $Eval2`
#export Eval=$(echo '( $MaxDay + $Epoch ) - ( $EpochSh / 86400 ) ' | bc)
echo "$Eval"
                 if [[ $Eval -lt 7 ]]
                 then
                 echo "Password for unix user $User on `hostname` is going to expire in less than a week. Please change it ASAP" | mailx -s 'Password Expiration ' $Email
                 elif [[ $Eval -le 0 ]]
                 then
                 echo "PASSWORD FOR USER $User HAS EXPIRED.PLEASE CHANGE IT ASAP TO AVOID PRODUCTION CRON JOBS FROM FAILING AND THE RESULTING LATE NIGHT CALLS" | mailx -s 'Password Expiration ' $Email
                 fi
done

+ + cut -d : -f 1
+ echo newadm:yj/khnry4nJiI:0:0:91::::
User=newadm
+ + cut -d : -f 5
+ echo newadm:yj/khnry4nJiI:0:0:91::::
MaxDay=91
+ echo 91
91
+ + cut -d : -f 3
+ echo newadm:yj/khnry4nJiI:0:0:91::::
Epoch=0
+ echo 0
0
+ + expr 91 + 0
Eval1=91
+ + expr 1359058335 / 86400
Eval2=15729
+ + expr 91 - 15729
Eval=-15638
+ echo -15638
-15638
+ [[ -15638 -lt 7 ]]
+ mailx -s Password Expiration  mygroup@mycompany.com
+ hostname
+ echo Password for unix user newadm on thisbox01 is going to expire in less than a week. Please change it ASAP

passwd -x -1

 
+ + cut -d : -f 1
+ echo testingadm:.ezNz7T6WZLK.:15730::::::
User=newadm
+ + cut -d : -f 5
+ echo testingadm:.ezNz7T6WZLK.:15730::::::
MaxDay=
+ echo
+ + cut -d : -f 3
+ echo testingadm:.ezNz7T6WZLK.:15730::::::
Epoch=15730
+ echo 15730
15730
+ + expr + 15730
expr: syntax error
Eval1=
+ + expr 1359133813 / 86400
Eval2=15730
+ + expr - 15730
expr: syntax error
Eval=
+ echo
+ [[  -lt 7 ]]
+ mailx -s Password Expiration  mygroup@mycompany.com
+ hostname
+ echo Password for unix user newadm on cmap01 is going to expire in less than a week. Please change it ASAP

[ $(id -u) -ne 0 ] && { echo "root only"; echo exit; }
grep adm /etc/shadow | { IFS=":"; while read user pw pwchg minpw maxpw Rest; do REMAINS=$(( pwchg + ${maxpw:-99999} - $(date +%s)/86400 )); [ $REMAINS -le 0 ] && echo mail $user "alert"; [ $REMAINS -le 7 ] && echo mail $user "warning" $REMAINS "days remain" ; done; }