OpenWrt menu based user and (smb)passwd management

whiptail_menu.sh

#!/bin/bash

# User Management script for OpenWRT Samba user managemen (passwd and smbpasswd files).
# Needs "whiptail" and "samba4-server" packages installed, can be set as startup script when logging in as root
# This will not care about user groups and assume all users have group "users" (gid 100) for simplicity!

W=/usr/bin/whiptail
UA=/usr/sbin/useradd
UD=/usr/sbin/userdel
S=/usr/bin/smbpasswd
SMALL="10 60"
FULL="25 78 5"

while true; do
    CHOICE=$($W --title "Created by: Jens Benecke" --menu "OpenWRT User Management.
Please use the cursor keys to navigate (not the mouse).
After creating a user here, this username can be used to assign shares
in the Web Interface at https://openwrt/." $FULL \
        "Add User"        "Add a user to the system"    \
        "Delete User"     "Delete an existing user"     \
        "Change Password" "Add or change user password" \
        "Exit"            "Exit the program"           3>&1 1>&2 2>&3)

    case $CHOICE in

        "Add User" )
	    USERNAME=$($W --inputbox "Please enter the short username (allowed: lowercase a-z, 0-9, _):" $SMALL 3>&1 1>&2 2>&3)
	    echo User = $USERNAME ; sleep 1
            if id "$USERNAME" >/dev/null 2>&1; then
                $W --msgbox "User already exists!" 10 60
            else
                $UA --no-user-group --no-create-home --password "*" "$USERNAME" && \
		$S -a -n -d "$USERNAME" && \
		$W --msgbox "User has been added, but has not yet received a password. Set one next." $SMALL
            fi

            if ! id "$USERNAME" >/dev/null 2>&1; then
                $W --msgbox "User was not created. Please recheck username." 10 60
	    fi
            ;;

        "Delete User" )
	    USERNAME=$($W --menu "Select a user for deletion. Only the account will be removed, no files." $SMALL \
		    $(cat /etc/passwd | grep ':100::' | cut -f1 -d: | while read X ; do echo "$X" "$X" ; done)  3>&1 1>&2 2>&3)
	    echo User = $USERNAME ; sleep 1
	    if id "$USERNAME" >/dev/null 2>&1 ; then 
		$W --yesno "Do you really want to delete $USERNAME?" $SMALL && \
		$S -x "$USERNAME" && \
                $UD "$USERNAME" && \
                $W --msgbox "User $USERNAME has been deleted." $SMALL
	    fi

            if id "$USERNAME" >/dev/null 2>&1; then
                $W --msgbox "User $USERNAME was not deleted. Please recheck username and try again." $SMALL
	    fi
	    ;;

        "Change Password")
	    USERNAME=$($W --menu "Select a user for password change." $FULL \
		    $(cat /etc/passwd | grep ':100::' | cut -f1 -d: | while read X ; do echo "$X" "$X" ; done)  3>&1 1>&2 2>&3)
	    echo User = $USERNAME ; sleep 1
            if id "$USERNAME" >/dev/null 2>&1; then
            	$S "$USERNAME"
            	$S -e "$USERNAME"
	    	$W --msgbox "Password changed successfully and user $USERNAME enabled." $SMALL
	    else
		$W --msgbox "No user selected or user not found." $SMALL
	    fi
            ;;

       "Exit")
	    echo "You can now close this terminal window or type 'exit' to logout."
            exit
            ;;
        *) # Invalid choice
            $W --msgbox "Invalid choice. Please try again." $SMALL

    esac

    echo "Back to menu ..."
    #sleep 1

done