#!/bin/bash
 
# Script to add a user to Linux system and set up samba user.
 
basedir=/home
usershell=/bin/bash
 
## Declare all the functions first
 
## function to check if user already exists on system
ifUserExits(){
        grep $1 /etc/passwd > /dev/null
        [ $? -eq 0 ] && return $TRUE || return $FALSE
}
 
## function to create the user with default shell and home directory passed from below
createNewUser(){
        if /usr/sbin/useradd "$@"
        then echo "User $6 Added"
        fi
}
 
## function to set the user password
createPassword(){
        if echo -e "$1\n$1\n" | /usr/bin/passwd $2
        then echo "Password Created for User $2"
        fi
}
 
## function to setup samba user
createNewSambaUser(){
        if (echo $1; echo $1) | /usr/bin/smbpasswd -as $2
        then echo "Samba Account for User $2 Added" 
        fi
}
 
## make sure root is running script
if [ $(id -u) -ne 0 ] 
then
    echo "You must be root to run this script!"
    exit 2
fi
 
## get username from input
read -p "Enter username : " username
 
## if user doesn't exist, add user
if ( ! ifUserExits $username )
   
then 
        ## get password from input
        read -p "Enter password : " password
        createNewUser -m -b $basedir -s $usershell $username
        createPassword $password $username
        createNewSambaUser $password $username
else
       ## oops, username already being used
        echo "Username \"$username\" already exists"
       exit 3
fi