#! /bin/sh
if test $# -le 0 
then
  for i in student faculty grad staff guest
  do
    groupname=$i
    egrep "^$groupname:" groupfile > groupline
    groupnumber=`awk -F: '{print $3}' groupline` 
    echo "$groupname -> $groupnumber"
    egrep ":$groupnumber:" passwdfile > passwdlines
    awk -F: '{print $1":"$5}' passwdlines > `echo $groupname`Names
    awk -F: '{print $1}' passwdlines > `echo $groupname`Emails
  done
else
  for i 
  do
    groupname=$i
    egrep "^$groupname:" groupfile > groupline
    groupnumber=`awk -F: '{print $3}' groupline`
    echo "$groupname -> $groupnumber"
    egrep ":$groupnumber:" passwdfile > passwdlines
    awk -F: '{print $1":"$5}' passwdlines > `echo $groupname`Names
    awk -F: '{print $1}' passwdlines > `echo $groupname`Emails
  done
fi