Displays a user friendly menu if remote host name is included in a file. See http://thisdavej.com/controlling-a-raspberry-pi-from-a-mobile-device-with-bonus-menu-too/ for more information.

menu1.sh

show_menu () {
    # We show the host name right in the menu title so we know which Pi we are connected to
    OPTION=$(whiptail --title "Menu (Host:$(hostname))" --menu "Choose your option:" 12 36 5 \
    "1" "Current time" \
    "2" "Calendar" \
    "3" "Uptime" \
    "4" "Reboot Pi" \
    "5" "Shut down Pi"  3>&1 1>&2 2>&3)
 
    BUTTON=$?
    # Exit if user pressed cancel or escape
    if [[ ($BUTTON -eq 1) || ($BUTTON -eq 255) ]]; then
        exit 1
    fi
    if [ $BUTTON -eq 0 ]; then
        case $OPTION in
        1)
            MSG="$(date)"
            whiptail --title "Current time" --msgbox "$MSG" 8 36
            show_menu
            ;;
        2)
            # We use "ncal -h" to turn off highlighting of today's date since
            # highlighting produces non-printable chars that don't look good.
            whiptail --title "Calendar" --textbox /dev/stdin 13 26 <<<"$(ncal -bh)"
            show_menu
            ;;
        3)
            MSG="$(uptime)"
            whiptail --title "Uptime info" --msgbox "$MSG" 8 36
            show_menu
            ;;
        4)
            # For sensitive commands, we make sure they must press extra keys
            confirmAnswer "Are you sure you want to reboot the Pi?"
            if [ $? = 0 ]; then
                echo Rebooting...
                sudo reboot
            else
                show_menu
            fi
            ;;
        5)
            confirmAnswer "Are you sure you want to shut down the Pi?"
            if [ $? = 0 ]; then
                echo Shutting down...
                sudo poweroff
            else
                show_menu
            fi
            ;;
        esac
    fi  
}

rmenu

#!/bin/bash
## USAGE
##   rmenu [options]
##
## DESCRIPTION
##   rmenu (remote menu) displays a user-friendly menu. A typical use case is to
##   display the menu when certain remote hosts connect using SSH. The menu is
##   displayed if the host MAC address is included in an rmenu_hosts file (contained
##   in the same directory as the rmenu script).  The rmenu command is typically
##   added to the user .profile (rmenu -c) so it will be invoked when a user
##   connects remotely through SSH.  To always show the menu no matter what
##   remote host connects, simply invoke rmenu without any parameters.
##
##   This script was originally created to enable a menu to appear when
##   connecting to a Raspberry Pi from an SSH client running on a mobile device.
##   Feel free to use this script and tweak the menu and make it useful for your
##   context!
##
## OPTIONS
##   -c, --conditional    Show menu if remote host is in the rmenu_hosts file.
##                        The rmenu_hosts file needs to be in the same directory
##                        as the rmenu script. If remote host is not coming
##                        through SSH, menu will not be shown either.
##  -m , --menu_num       The menu number to invoke. By default, the menu code in
##                        menu1.sh to display the menu. You can create additional
##                        files in the same directory as rmenu such as menu2.sh
##                        to invoke different menus.
##
##   -h, --help           Display this message.
##
## Example rmenu_hosts file (lines starting with "#" are ignored)
##  # MAC addresses of hosts that should see remote menu when make SSH connection
##  de:57:33:a4:8a:2b
##
## DEPENDENCIES
##   whiptail
##
## IMPLEMENTATION
##   Author: Dave Johnson (https://thisdavej.com/)
##   Copyright: Copyright (c) https://thisdavej.com/
##   License: MIT License (MIT)
##
confirmAnswer () {
    whiptail --title "Confirmation" --yes-button "Yes" --no-button "No"  --defaultno --yesno "$1" 8 36
    return $?
    # returns 0 = yes, 1 = no, 255 = escape key hit
}
# Modify the menu and commands below to suit your needs. On my Android device, five menu items is a good
# number to avoid vertical scrolling.
show_menu_if_host_in_list () {
    # If we are not coming through SSH (we are in through VNC, etc.), $SSH_CONNECTION will not be set.
    # Don't show the menu in this case if someone invokes directly from the terminal.  Most of the time,
    # the rmenu command will be invoked through .profile and .profile is not used when launching terminal
    # sessions from the desktop, only when connecting through an SSH connection.
    if [ -z "$SSH_CONNECTION" ]; then
        clear
        show_menu
        exit
    fi
    DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
    menuhosts_file=$DIR/rmenu_hosts
    if [ ! -f "$menuhosts_file" ]; then
        echo "$menuhosts_file" file not found. Cannot evaluate whether remote host is in the list.
        exit 1
    fi
    declare -a MENU_HOSTS
    MENU_HOSTS=( `cat "$menuhosts_file"`)

    SSH_CLIENT_IP=$(echo $SSH_CONNECTION | awk '{ print $1 }')
    SSH_CLIENT_MAC_ADDRESS=$(arp -an $SSH_CLIENT_IP | awk '{ print $4 }')

    # Make upper case for string comparison
    SSH_CLIENT_MAC_ADDRESS=${SSH_CLIENT_MAC_ADDRESS^^}
    FOUND_MATCH=false
    for i in "${MENU_HOSTS[@]}"
    do
        if [[ "$i" == "#"* ]]; then
            continue
        fi
       if [ "$SSH_CLIENT_MAC_ADDRESS" == "${i^^}" ]; then
            FOUND_MATCH=true
            break
       fi
    done
    if $FOUND_MATCH; then
        clear
        show_menu
    fi
}

usage() {
  [ "$*" ] && echo "$0: $*"
  sed -n '/^##/,/^$/s/^## \{0,1\}//p' "$0"
  exit 2
} 2>/dev/null

MENU_NUMBER=1

while [[ $# -gt 0 ]]
do
key="$1"
case $key in
    -c|--conditional)
    CONDITIONAL=true
    ;;
    -m|--menu_num)
  MENU_NUMBER="$2"
  shift
    ;;
    -h|--help)
    usage
    ;;
    *)
        # unknown option
    ;;
esac
shift # past argument or value
done

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source $DIR/menu$MENU_NUMBER.sh

if [ "$CONDITIONAL" = true ] ; then
    show_menu_if_host_in_list
else
    show_menu
fi

rmenu_hosts

# MAC addresses of hosts that should see remote menu when make SSH connection
ac:37:43:a6:8a:9f
#7c:df:44:ed:57:42