#! /bin/sh
#
# Script to report (on screen, if no redirection) on expiration date of
# the password of each user.  Skips the first 18 accounts listed in
# /etc/passwd as they are not for real users.  Adjust this number to
# fit the passwd file on your system.

tmpfile="/tmp/checkexp.$$"

if [ `whoami` != "root" ]
then
   echo "Only root can run this script"
   exit 1
fi

cat /etc/passwd | cut -d ':' -f1 > "$tmpfile"
sync
sleep 1
count=0

while read id
do
   if [ "$count" = "18" ]
   then
      echo -ne "$id      \t"
      chage -l $id | grep "Password Expires:"
   else   # skip the first several accounts
      count=`expr $count + 1`
   fi
done < "$tmpfile"

sync
sleep 1
rm $tmpfile
exit 0