#!/bin/bash
###############################################################
#This Script is Created by                                    #
#                USMAN AKRAM  (ajaonchat)                     #
#                                       FA05-BTN-005          #
#                            BTN-6                            #
###############################################################
add_users()
{
    ROOT_UID=0      #The root user has a UID of 0
    if      [ "$UID" -ne "$ROOT_UID" ]; then
            echo "****You must be the root user to run this script!****"
            exit
    fi
    echo
    echo Identity Verified_You are the Root
    echo

    echo -e "\n#########################################\n"
    echo -e "Please Select the Mode!!!\n"
    echo -e "1. Add the Users Manually\n
2.Read the Users Automatically  from Text File\n"
    echo -e "###########################################"
    read add_opt
    case $add_opt in
        1)
        echo -e "Please Enter the User name:"
        read usr_name
        echo -e "Please enter the User Group"
        read usr_group
        groupadd $usr_group
        useradd -g $usr_group -m $usr_name
                echo -e "Please enter the Password for User $usr_name"
    passwd $usr_name ;;
    2)
       echo
       echo "Present working directory is: `pwd`/users.txt"
       echo
       echo -e "Do you want to use the above Default PATH? Yes=1 & No=2"
       read yn
if [ $yn == 1 ]; then
                      Path=$($pwd)users.txt
else
       echo -n "Please enter the correct path to the file (e.g. /root/folder/filename.txt): "
       read Path
fi
if [ -e $Path ]; then           #If the file user specified exists
Username=lucky
num=1
    while  [ $Username != "EOF" ]
        do
        Username=`grep "Username00$num" $Path | cut -f2 -d:`   #Extract Username from text file
num=$(($num+1))
        Password=`grep "Password" $Path | cut -f2 -d:`       #Extract Password from text file
        Group=`grep "Group" $Path |cut -f2 -d:`              #Extract Group From text file

        groupadd $Group

                       #Adds user to the system and gives them a password
           if [ $Username == "EOF" ]; then
                   clear
                   main
           fi
                #Adds user to the system

                useradd -g $Group -s "/bin/bash" -d /home/$Username -m $Username
                #Add users password
                #echo $Password | /usr/bin/passwd --stdin $Username #user Password will be assigned
                echo -e "$Password\n$Password\n" | sudo passwd $Username
    done
else  #If the user Specified file doesn't Exists
    echo -e "\n#############################################"
    echo -e "\n######CANNOT FIND or LOCATE THE FILE!!!!#####"
    echo -e "\n#############################################"
fi;;
*) echo -e "You have selected the Wrong Choice!!!"
esac

}
varify()
{
    echo -e "#################################"
    echo -e "Please Select the Mode!!!\n"
    echo -e "1.Varify All the Users of System\n
2.Varify All the Users of TEXT file\n"
    echo -e "#################################"
    read varify_user
case $varify_user in
        1) cat /etc/passwd |grep bash;;
        2)
    echo
        echo "Present working directory is: `pwd`/users.txt"
        echo
        echo -e "Do you want to use the above Default PATH? Yes=1 & No=2"
        read yn
if [ $yn == 1 ]; then
                     Path=$($pwd)users.txt
else
        echo -n "Please enter the correct path to the file (e.g. /root/folder/filename.txt): "
        read Path
fi
if [ -e $Path ]; then
    Path=$($pwd)users.txt
    varify=`grep "varify" $Path |cut -f2 -d:`
      cat  /etc/passwd | grep $varify
  echo -e "\nYou have Currently "
          cat /etc/passwd | grep $varify |wc -l
      echo  "users added from your Text file"
else  #If the user Specified file doesn't Exists
      echo -e "\n#############################################"
      echo -e "\n######CANNOT FIND or LOCATE THE FILE!!!!#####"
      echo -e "\n#############################################"
fi ;;
*) echo -e "Wrong Choice"
esac

}

del_users()
{
#This Script will delete the Users from the HOME DIRECTORY!!!!
ROOT_UID=0      #The root user has a UID of 0
    if      [ "$UID" -ne "$ROOT_UID" ]; then
            echo "****You must be the root user to run this script!****"
            exit
    fi
    echo
    echo Identity Verified_You are the Root
    echo

    echo
    echo "Present working directory is: `pwd`/students.txt"
    echo

#This is the Menu to select the mode to Deletion the users, either delete selected user or to delete all the users you have in the TEXT file...???
echo -e "####################################"
echo -e "\nPlease select the Mode!!!\n
1.Delete Specific User\n
2.Delete all Users Specified in the TEXT File\n"
echo -e "####################################"
read del_opt
case $del_opt in
    1)
        echo -e "\n\nYou have currently following USERS Added to your System\n"
         cat  /etc/passwd |grep bash
        echo -e "\n\n Type the Name of the User you wants to Delete :"
        read user_name
        userdel -r $user_name ;;
    2)
       echo
       echo "Present working directory is: `pwd`/users.txt"
       echo
       echo -e "Do you want to use the above Default PATH? Yes=1 & No=2"
       read yn
if [ $yn == 1 ]; then
       Path=$($pwd)users.txt
else
       echo -n "Please enter the correct path to the file (e.g. /root/folder/filename.txt): "
       read Path
fi
if [ -e $Path ]; then       #If the file user specified exists
        num=1
Username=lucky
        while  [ $Username != "EOF" ]
        do
        Username=`grep "Username00$num" $Path | cut -f2 -d:`   #Extract Username from text file

        if [ $Username == "EOF" ]; then
                clear
            main
        fi

                userdel -r $Username
num=$(($num+1))
    done
else  #If the user Specified file doesn't Exists
    echo -e "\n#############################################"
    echo -e "\n######CANNOT FIND or LOCATE THE FILE!!!!#####"
    echo -e "\n#############################################"
fi ;;
*) echo -e "Wrong Choice"
esac
}

main()
{
    opt=1
while [ $opt -le 4 ]
do
    clear
echo -e "           ### MENU ###\n
            1. ADD USERS\n
            2. Varify Users\n
            3. Delete Users\n
            4. EXIT\n"
read opt
case $opt in
    1) add_users ;;
    2) varify ;;
    3) del_users ;;
    4) exit 0 ;;
    *) echo -e "You have Entered the Wrong Choice!!!"
esac
echo -e "\nWant to run Script Again Yes=1 & No=4."
read opt
done
}
main
exit 0