vsFtp User Script

#!/bin/bash
# Purpose - Script to add a user to Linux system including passsword
# Author - Vivek Gite <www.cyberciti.biz> under GPL v2.0+
# ------------------------------------------------------------------
# Am i Root user?
if [ $(id -u) -eq 0 ]; then
        read -p "Enter username: " username
        read -p "Enter Directory: " dir
        read -s -p "Enter password: " password
        egrep "^$username" /etc/passwd >/dev/null
        if [ $? -eq 0 ]; then
                echo "$username exists!"
                exit 1
        else
                pass=$(perl -e 'print crypt($ARGV[0], "password")' $password)
                echo $username >> /etc/vsftpd.userlist
                useradd -m -p "$pass" -d "$dir" -g www-data -s /bin/ftponly "$username"
                chmod -R 777 "$dir"
                [ $? -eq 0 ] && echo "User has been added to system!" || echo "Failed to add a user!"
        fi
else
        echo "Only root may add a user to the system."
        exit 2
fi