freedombone/src/freedombone-controlpanel

#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Administrator control panel for the Freedombone system
#
# License
# =======
#
# Copyright (C) 2015-2016 Bob Mottram <bob@freedombone.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

PROJECT_NAME='freedombone'

export TEXTDOMAIN=${PROJECT_NAME}-controlpanel
export TEXTDOMAINDIR="/usr/share/locale"

UTILS_FILES=/usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-*
for f in $UTILS_FILES
do
    source $f
done

APP_FILES=/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*
for f in $APP_FILES
do
    source $f
done

COMPLETION_FILE=$HOME/${PROJECT_NAME}-completed.txt
SELECTED_USERNAME=
SIP_CONFIGURATION_FILE=/etc/sipwitch.conf
ADMIN_USER=
UPGRADE_SCRIPT_NAME="${PROJECT_NAME}-upgrade"
UPDATE_DATE_SCRIPT=/usr/bin/updatedate

# Minimum number of characters in a password
MINIMUM_PASSWORD_LENGTH=$(cat /usr/share/${PROJECT_NAME}/utils/${PROJECT_NAME}-utils-passwords | grep 'MINIMUM_PASSWORD_LENGTH=' | head -n 1 | awk -F '=' '{print $2}')

# Mumble
MUMBLE_PORT=64738
MUMBLE_ONION_PORT=8095

SSH_PORT=2222

# outgoing SMTP proxy
SMTP_PROXY_ENABLE=$'no'
SMTP_PROXY_PROTOCOL='smtps'
SMTP_PROXY_SERVER='mail.myispdomain'
SMTP_PROXY_PORT=465
SMTP_PROXY_USERNAME=''
SMTP_PROXY_PASSWORD=''

WIFI_INTERFACE=wlan0
WIFI_SSID=
WIFI_TYPE='wpa2-psk'
WIFI_PASSPHRASE=
WIFI_HOTSPOT='no'
WIFI_NETWORKS_FILE=~/${PROJECT_NAME}-wifi.cfg

USB_DRIVE=sdb
# get default USB from config file
CONFIGURATION_FILE=$HOME/${PROJECT_NAME}.cfg

read_config_param WIFI_HOTSPOT
read_config_param WIFI_INTERFACE
read_config_param WIFI_TYPE
read_config_param WIFI_SSID
read_config_param WIFI_PASSPHRASE
read_config_param SSH_PORT
read_config_param SMTP_PROXY_ENABLE
read_config_param SMTP_PROXY_PROTOCOL
read_config_param SMTP_PROXY_SERVER
read_config_param SMTP_PROXY_PORT
read_config_param SMTP_PROXY_USERNAME
read_config_param SMTP_PROXY_PASSWORD
read_config_param USB_DRIVE
if [[ $USB_DRIVE == *"dev"* ]]; then
    USB_DRIVE=$(echo ${USB_DRIVE} | awk -F '/' '{print $3}' | sed 's|1||g' | sed 's|2||g')
fi

# Mirrors settings
FRIENDS_MIRRORS_SERVER=
FRIENDS_MIRRORS_SSH_PORT=2222
FRIENDS_MIRRORS_PASSWORD=
MY_MIRRORS_PASSWORD=

function any_key {
    echo ' '
    read -n1 -r -p $"Press any key to continue..." key
}

function get_app_icann_address {
    app_name="$1"
    icann_address=""
    if grep -q "${app_name} domain" $COMPLETION_FILE; then
        icann_address=$(cat ${COMPLETION_FILE} | grep "${app_name} domain" | head -n 1 | awk -F ':' '{print $2}')
    fi
    echo "$icann_address"
}

function passwords_select_user {
    SELECTED_USERNAME=

    users_array=($(ls /home))

    delete=(mirrors git)
    for del in ${delete[@]}
    do
        users_array=(${users_array[@]/$del})
    done

    i=0
    W=()
    name=()
    for u in ${users_array[@]}
    do
        if [[ $(is_valid_user "$u") == "1" ]]; then
            i=$((i+1))
            W+=($i "$u")
            name+=("$u")
        fi
    done

    if [ $i -eq 1 ]; then
        SELECTED_USERNAME="${name[0]}"
    else
        user_index=$(dialog --backtitle $"Freedombone Control Panel" --title $"Select User" --menu $"Select one of the following:" 24 40 17 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ $? -eq 0 ]; then
            SELECTED_USERNAME="${name[$((user_index-1))]}"
        fi
    fi
}

function passwords_show_apps {
    SELECTED_APP=
    i=0
    W=()
    name=()
    for a in "${APPS_AVAILABLE[@]}"
    do
        if [[ $(function_exists change_password_${a}) == "1" ]]; then
            i=$((i+1))
            W+=($i "$a")
            name+=("$a")
        fi
    done

    selected_app_index=$(dialog --backtitle $"Freedombone Control Panel" --title $"Select App" --menu $"Select one of the following:" 24 40 17 "${W[@]}" 3>&2 2>&1 1>&3)

    if [ $? -eq 0 ]; then
        SELECTED_APP="${name[$((selected_app_index-1))]}"
    fi
}

function view_or_change_passwords {
    passwords_select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    detect_installed_apps
    passwords_show_apps
    if [ ! $SELECTED_APP ]; then
        return
    fi

    CURR_PASSWORD=$(${PROJECT_NAME}-pass -u ${SELECTED_USERNAME} -a ${SELECTED_APP})

    icann_address=$(get_app_icann_address "$app_name")
    onion_address=$(get_app_onion_address "${SELECTED_APP}")
    if [ ${#onion_address} -gt 0 ]; then
        viewstr=$"${SELECTED_APP} password for ${SELECTED_USERNAME} on $icann_address or $onion_address.\n\nCopy or change it if you wish."
    else
        viewstr=$"${SELECTED_APP} password for ${SELECTED_USERNAME} on $icann_address\n\nCopy or change it if you wish."
    fi

    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"View or Change Password" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox "$viewstr" 12 60 "$CURR_PASSWORD" 2>$data
    sel=$?
    case $sel in
        0)
            CURR_PASSWORD=$(<$data)
            if [ ${#CURR_PASSWORD} -gt 8 ]; then
                ${PROJECT_NAME}-pass -u ${SELECTED_USERNAME} -a ${SELECTED_APP} -p "${CURR_PASSWORD}"
                change_password_${SELECTED_APP} ${SELECTED_USERNAME} "${CURR_PASSWORD}"
                dialog --title $"Change password" \
                       --msgbox $"The password was changed" 6 40
            fi
            ;;
    esac

}

function check_for_updates {
    if [ ! -f /etc/cron.weekly/$UPGRADE_SCRIPT_NAME ]; then
        dialog --title $"Check for updates" \
               --msgbox $"Upgrade script was not found" 6 40
        return
    fi

    clear
    . /etc/cron.weekly/$UPGRADE_SCRIPT_NAME
    any_key
}

function set_main_repo {
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title $"Main Repository (Mirrors)" \
           --form $"If you do not wish to use the default repositories they can be obtained from mirrors on another ${PROJECT_NAME} server." 14 60 3 \
           $"URL:" 1 1 "$FRIENDS_MIRRORS_SERVER" 1 14 40 15 \
           $"SSH Port:" 2 1 "$FRIENDS_MIRRORS_SSH_PORT" 2 14 40 10000 \
           $"Password:" 3 1 "$FRIENDS_MIRRORS_PASSWORD" 3 14 40 10000 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    new_mirrors_url=$(cat $data | sed -n 1p)
    new_mirrors_ssh_port=$(cat $data | sed -n 2p)
    new_mirrors_password=$(cat $data | sed -n 3p)

    if [ ${#new_mirrors_url} -lt 2 ]; then
        return
    fi
    if [ ${#new_mirrors_ssh_port} -lt 1 ]; then
        return
    fi
    if [ ${#new_mirrors_password} -lt 10 ]; then
        dialog --title $"Main Repository" \
               --msgbox $'Mirrors password was too short. Should be at least 10 characters.' 6 40
        return
    fi

    if [[ $new_mirrors_url == *"."* ]]; then
        FRIENDS_MIRRORS_SERVER=$new_mirrors_url
        FRIENDS_MIRRORS_SSH_PORT=$new_mirrors_ssh_port
        FRIENDS_MIRRORS_PASSWORD=$new_mirrors_password

        write_config_param "FRIENDS_MIRRORS_SERVER" "$FRIENDS_MIRRORS_SERVER"
        write_config_param "FRIENDS_MIRRORS_SSH_PORT" "$FRIENDS_MIRRORS_SSH_PORT"
        write_config_param "FRIENDS_MIRRORS_PASSWORD" "$FRIENDS_MIRRORS_PASSWORD"

        # re-read the repos
        read_repo_servers

        dialog --title $"Main Repository" \
               --msgbox $"Main repository set to $FRIENDS_MIRRORS_SERVER" 6 60
    fi
}

function add_user {
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title $"Add new user" \
           --form "\n" 8 60 3 \
           $"Username:" 1 1 "" 1 28 16 15 \
           $"ssh public key (optional):" 2 1 "" 2 28 40 10000 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    new_user_username=$(cat $data | sed -n 1p)
    new_user_ssh_public_key=$(cat $data | sed -n 2p)
    if [ ${#new_user_username} -lt 2 ]; then
        dialog --title $"New username" \
               --msgbox $"No username was given" 6 40
        return
    fi
    if [[ "$new_user_username" == *" "* ]]; then
        dialog --title $"Invalid username" \
               --msgbox $"The username should not contain any spaces" 6 40
        return
    fi
    if [ ${#new_user_ssh_public_key} -lt 20 ]; then
        clear
        ${PROJECT_NAME}-adduser "$new_user_username"
        any_key
    else
        if [[ "$new_user_ssh_public_key" == "ssh-"* ]]; then
            clear
            ${PROJECT_NAME}-adduser "$new_user_username" "$new_user_ssh_public_key"
            any_key
        else
            dialog --title $"ssh public key" \
                   --msgbox $"This does not look like an ssh public key" 6 40
        fi
    fi
}

function pad_string {
    echo -n -e "$1" | sed -e :a -e 's/^.\{1,25\}$/& /;ta'
}

function show_domains {
    read_config_param "DEFAULT_DOMAIN_NAME"

    echo 'Domains'
    echo '======='
    echo ''
    echo -n -e "$(pad_string 'Name')"
    echo -n -e "$(pad_string 'ICANN')"
    echo -n -e "$(pad_string 'Tor')"
    echo ''
    echo '--------------------------------------------------------------------------'
    if grep -q "ssh onion domain" $COMPLETION_FILE; then
        echo -n -e "$(pad_string 'ssh')"
        echo -n -e "$(pad_string ${DEFAULT_DOMAIN_NAME})"
        echo "$(cat ${COMPLETION_FILE} | grep 'ssh onion domain' | awk -F ':' '{print $2}')"
    fi
    if grep -q "email onion domain" $COMPLETION_FILE; then
        echo -n -e "$(pad_string 'Email')"
        echo -n -e "$(pad_string ${DEFAULT_DOMAIN_NAME})"
        echo "$(cat ${COMPLETION_FILE} | grep 'email onion domain' | awk -F ':' '{print $2}')"
    fi

    for app_name in "${APPS_INSTALLED_NAMES[@]}"
    do
        if ! grep -q "SHOW_ON_ABOUT=1" /usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-${app_name}; then
            continue
        fi

        icann_address=${DEFAULT_DOMAIN_NAME}
        onion_address="-"

        # handle the foibles of capitalisation
        if ! grep -q "${app_name} domain" $COMPLETION_FILE; then
            app_name_upper=$(echo ${app_name} | awk '{print toupper($0)}')
            if grep -q "${app_name_upper} domain" $COMPLETION_FILE; then
                app_name=${app_name_upper}
            else
                app_name_first_upper="$(tr '[:lower:]' '[:upper:]' <<< ${app_name:0:1})${app_name:1}"
                if grep -q "${app_name_first_upper} domain" $COMPLETION_FILE; then
                    app_name=${app_name_first_upper}
                fi
            fi
        fi

        if [ ${#app_name} -gt 0 ]; then
            icann_address=$(get_app_icann_address "$app_name")
            onion_address=$(get_app_onion_address "$app_name")

            echo -n -e "$(pad_string "${app_name}")"
            echo -n -e "$(pad_string "${icann_address}")"
            echo "${onion_address}"

            if grep -q "${app_name}_mobile onion domain" $COMPLETION_FILE; then
                onion_address=$(get_app_onion_address "${app_name}" "mobile")
                echo -n -e "$(pad_string "${app_name} (mobile)")"
                echo -n -e "$(pad_string "${icann_address}")"
                echo "${onion_address}"
            fi
        fi
    done

    if grep -q "rss reader domain" $COMPLETION_FILE; then
        if [ -d /var/lib/tor/hidden_service_ttrss ]; then
            echo -n -e "$(pad_string 'RSS reader')"
            RSSDOM='-'
            echo -n -e "$(pad_string ${RSSDOM})"
            echo -n "$(cat /var/lib/tor/hidden_service_ttrss/hostname)"
            echo ''
        fi
        if [ -d /var/lib/tor/hidden_service_ttrss_mobile ]; then
            echo -n -e "$(pad_string 'RSS mobile')"
            RSSMOBILEDOM='-'
            echo -n -e "$(pad_string ${RSSMOBILEDOM})"
            echo -n "$(cat /var/lib/tor/hidden_service_ttrss_mobile/hostname)"
            echo ''
        fi
    fi
    echo ''
}

function show_users {
    echo 'Users'
    echo '====='
    echo ''
    echo -n -e "$(pad_string 'Name')"
    if [[ $(app_is_installed sip) == "1" ]]; then
        echo -n -e "$(pad_string 'SIP ext')"
    fi
    echo -n -e "$(pad_string 'Data')"
    echo ''
    echo '----------------------------------'
    for d in /home/*/ ; do
        USRNAME=$(echo "$d" | awk -F '/' '{print $3}')
        if [[ $(is_valid_user "$USRNAME") == "1" ]]; then
            echo -n -e "$(pad_string ${USRNAME})"
            # get the SIP extension
            SIPEXT=
            if [ -f $SIP_CONFIGURATION_FILE ]; then
                while read ext; do
                    if [[ $ext == *"user id"* ]]; then
                        CURR_UID=$(echo "$ext" | awk -F '"' '{print $2}' | awk -F '"' '{print $1}')
                    fi
                    if [[ $ext == *"extension"* ]]; then
                        if [[ $CURR_UID == $USRNAME ]]; then
                            SIPEXT=$(echo "$ext" | awk -F '>' '{print $2}' | awk -F '<' '{print $1}')
                        fi
                    fi
                done < $SIP_CONFIGURATION_FILE
            fi
            if [ $SIPEXT ]; then
                echo -n -e "$(pad_string SIP:${SIPEXT})"
            else
                echo -n -e "$(pad_string '')"
            fi

            # size of the home directory
            echo "$(du -s -h /home/${USRNAME} | awk -F ' ' '{print $1}')"
        fi
    done
    echo ''
}

function show_mirrors_password {
    if [ ! /home/mirrors ]; then
        return
    fi
    read_config_param "MY_MIRRORS_PASSWORD"
    echo 'Local Mirrors'
    echo '============='
    echo ''
    echo -n "URL:      "
    echo "$(cat ${COMPLETION_FILE} | grep 'ssh onion domain' | awk -F ':' '{print $2}')"
    echo "SSH Port: $SSH_PORT"
    echo "Password: $MY_MIRRORS_PASSWORD"
    echo ''
}

function show_tahoe_introducer {
    if [ ! -f /home/tahoelafs/.tahoe-introducer/private/introducer.furl ]; then
        return
    fi
    echo 'Tahoe-LAFS'
    echo '=========='
    echo ''
    cat /home/tahoelafs/.tahoe-introducer/private/introducer.furl
    echo ''
}

function show_ip_addresses {
    echo 'IP/DNS addresses'
    echo '================'
    echo ''
    echo -n "IPv4: $(get_ipv4_address)"
    ipv6_address="$(get_ipv6_address)"
    if [ ${#ipv6_address} -gt 0 ]; then
        echo "    IPv6: ${ipv6_address}"
    fi
    echo ''
    echo ''
}

function show_about {
    clear
    echo ''
    echo $'  Detecting installed apps...'
    detect_apps
    get_apps_installed_names

    clear
    show_ip_addresses
    show_domains
    show_mirrors_password
    show_tahoe_introducer
    show_users
    any_key
}

function select_user {
    SELECTED_USERNAME=

    users_array=($(ls /home))

    delete=(mirrors git)
    for del in ${delete[@]}
    do
        users_array=(${users_array[@]/$del})
    done

    i=0
    W=()
    name=()
    for u in ${users_array[@]}
    do
        if [[ $(is_valid_user "$u") == "1" ]]; then
            i=$((i+1))
            W+=($i "$u")
            name+=("$u")
        fi
    done

    if [ $i -eq 1 ]; then
        SELECTED_USERNAME="${name[0]}"
    else
        user_index=$(dialog --backtitle $"Freedombone Control Panel" --title $"Select User" --menu $"Select one of the following:" 24 40 17 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ $? -eq 0 ]; then
            SELECTED_USERNAME="${name[$((user_index-1))]}"
        fi
    fi
}

function delete_user {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    if grep -Fxq "Admin user:$SELECTED_USERNAME" $COMPLETION_FILE; then
        dialog --title $"Administrator user" \
               --msgbox $"You can't delete the administrator user" 6 40
        return
    fi
    clear
    ${PROJECT_NAME}-rmuser $SELECTED_USERNAME
    any_key
}

function configure_remote_backups {
    if ! grep -Fxq "Admin user:$ADMIN_USER" $COMPLETION_FILE; then
        dialog --title $"Administrator user" \
               --msgbox $"No Administrator user found. Check $COMPLETION_FILE" 6 40
        return
    fi
    if [ ${#ADMIN_USER} -lt 2 ]; then
        dialog --title $"Administrator user" \
               --msgbox $"Username not found" 6 40
        return
    fi
    if [ ! -d /home/$ADMIN_USER ]; then
        dialog --title $"Administrator user" \
               --msgbox $"Home directory not found" 6 40
        return
    fi
    ${PROJECT_NAME}-remote -u $ADMIN_USER
    if [ ! "$?" = "0" ]; then
        any_key
    fi
}

function change_password {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi

    dialog --title $"Change password" \
           --passwordbox $"New password for user $SELECTED_USERNAME" 8 40 2> $data
    newpassword=$(<$data)
    if [ ${#newpassword} -lt ${MINIMUM_PASSWORD_LENGTH} ]; then
        dialog --title $"Change password" \
               --msgbox $"The password should be ${MINIMUM_PASSWORD_LENGTH} or more characters" 6 40
        return
    fi

    echo "$SELECTED_USERNAME:$newpassword"|chpasswd

    dialog --title $"Change password" \
           --msgbox $"Password for $SELECTED_USERNAME was changed" 6 40
}

function change_ssh_public_key {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi

    if grep -Fxq "Admin user:$SELECTED_USERNAME" $COMPLETION_FILE; then
        dialog --title $"Change ssh public key" \
               --backtitle $"Freedombone Control Panel" \
               --defaultno \
               --yesno $"\nThis is the administrator user.\n\nAre you sure you want to change the ssh public key for the administrator?" 10 60
        sel=$?
        case $sel in
            1) return;;
            255) return;;
        esac
    fi

    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Change ssh public key for $SELECTED_USERNAME" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $"Paste the ssh public key below" 8 60 2>$data
    sel=$?
    case $sel in
        0)
            SSH_PUBLIC_KEY=$(<$data)
            if [ "$SSH_PUBLIC_KEY" ]; then
                if [ ${#SSH_PUBLIC_KEY} -gt 5 ]; then
                    if [ -f "$SSH_PUBLIC_KEY" ]; then
                        if [ ! -d /home/$SELECTED_USERNAME/.ssh ]; then
                            mkdir /home/$SELECTED_USERNAME/.ssh
                        fi
                        cp $SSH_PUBLIC_KEY \
                           /home/$SELECTED_USERNAME/.ssh/authorized_keys
                        chown -R $SELECTED_USERNAME:$SELECTED_USERNAME \
                              /home/$SELECTED_USERNAME/.ssh
                        dialog --title $"Change ssh public key" \
                               --msgbox $"ssh public key was installed" 6 40
                    else
                        if [[ "$SSH_PUBLIC_KEY" == "ssh-"* ]]; then
                            if [ ! -d /home/$SELECTED_USERNAME/.ssh ]; then
                                mkdir /home/$SELECTED_USERNAME/.ssh
                            fi
                            echo "$SSH_PUBLIC_KEY" > \
                                 /home/$SELECTED_USERNAME/.ssh/authorized_keys
                            chown -R $SELECTED_USERNAME:$SELECTED_USERNAME \
                                  /home/$SELECTED_USERNAME/.ssh
                            dialog --title $"Change ssh public key" \
                                   --msgbox $"ssh public key was installed" 6 40
                        fi
                    fi
                fi
            fi
            ;;
    esac
}

function remove_user_from_mailing_list {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    USER_MAILING_LISTS=$(cat "/home/$SELECTED_USERNAME/.procmailrc" | grep '\[' | grep '\]' | awk -F '\[' '{print $2}' | awk -F '\\' '{print $1}')

    i=0
    W=()
    list_name=()
    while read -r listname; do
        i=$((i+1))
        W+=($i "$listname")
        list_name+=("$listname")
        echo $listname
    done <<< "$USER_MAILING_LISTS"

    i=$((i+1))
    W+=($i $"Exit back to user mainenance")

    list_selected=$(dialog --default-item "$i" --backtitle $"Freedombone Control Panel" --title $"Remove a mailing list for $SELECTED_USERNAME" --menu $"Select one of the following:" 24 50 17 "${W[@]}" 3>&2 2>&1 1>&3)

    if [ $? -eq 0 ]; then # Exit with OK
        if [ ${list_selected} -ne ${i} ]; then
            remove_list_name="${list_name[$((list_selected-1))]}"

            # find the line number where the list is defined
            line_number=0
            i=0
            while read -r line
            do
                if [[ "$line" == *"\[${remove_list_name}\\]"* ]]; then
                    line_number=${i}
                fi
                i=$((i+1))
            done < "/home/$SELECTED_USERNAME/.procmailrc"

            if [ ${line_number} -eq 0 ]; then
                # no match was found
                return
            fi

            # recreate the file
            if [ -f /home/${SELECTED_USERNAME}/.procmailrc_new ]; then
                rm /home/${SELECTED_USERNAME}/.procmailrc_new
            fi
            i=0
            clip=0
            while read -r line
            do
                i=$((i+1))
                if [ ${i} -gt $((line_number-1)) ]; then
                    if [ ${clip} -eq 0 ]; then
                        clip=1
                    fi
                    if [ ${clip} -eq 1 ]; then
                        if [ ${i} -lt $((line_number+2)) ]; then
                            continue
                        else
                            if [ ${#line} -lt 1 ]; then
                                clip=2
                                continue
                            fi
                            if [[ "$line" == ":"* || "$line" == "#"* ]]; then
                                clip=2
                            else
                                continue
                            fi
                        fi
                    fi
                fi

                echo "$line" >> /home/${SELECTED_USERNAME}/.procmailrc_new

                if [[ "$line" == *"\[${remove_list_name}\\]"* ]]; then
                    line_number=${i}
                fi
            done < "/home/$SELECTED_USERNAME/.procmailrc"
            cp /home/${SELECTED_USERNAME}/.procmailrc_new /home/${SELECTED_USERNAME}/.procmailrc
            rm /home/${SELECTED_USERNAME}/.procmailrc_new
            chown ${SELECTED_USERNAME}:${SELECTED_USERNAME} /home/${SELECTED_USERNAME}/.procmailrc
            dialog --title $"Remove user from mailing list" \
                   --msgbox $"${SELECTED_USERNAME} has been removed from ${remove_list_name}" 6 50
        fi
    fi
}

function add_to_mailing_list {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title $"Subscribe $SELECTED_USERNAME to a mailing list" \
           --form $"You can either enter a subject or an email address\n" 11 68 4 \
           $"List folder name:" 1 1 "" 1 35 26 25 \
           $"Name between [] on subject line:" 2 1 "" 2 35 26 25 \
           $"List email address:" 3 1 "" 3 35 26 25 \
           $"Public:" 4 1 $"yes" 4 35 4 25 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    LIST_NAME=$(cat $data | sed -n 1p)
    LIST_SUBJECT=$(cat $data | sed -n 2p)
    LIST_EMAIL=$(cat $data | sed -n 3p)
    LIST_PUBLIC=$(cat $data | sed -n 4p)

    if [ ${#LIST_PUBLIC} -lt 1 ]; then
        LIST_PUBLIC='no'
    fi
    if [[ $LIST_PUBLIC == $'y' || $LIST_PUBLIC == $'Y' || $LIST_PUBLIC == $'true' || $LIST_PUBLIC == $'True' || $LIST_PUBLIC == $'yes' || $LIST_PUBLIC == $'Yes' || $LIST_PUBLIC == $'YES' ]]; then
        LIST_PUBLIC='yes'
    else
        LIST_PUBLIC='no'
    fi
    if [ ${#LIST_NAME} -lt 2 ]; then
        dialog --title $"Add mailing list" \
               --msgbox $"No mailing list name was given" 6 40
        return
    fi
    if [ ${#LIST_SUBJECT} -lt 2 ]; then
        if [ ${#LIST_EMAIL} -lt 2 ]; then
            dialog --title $"Add mailing list" \
                   --msgbox $"No mailing list subject or address was given" 6 40
            return
        fi
    fi
    if [ ${#LIST_SUBJECT} -gt 1 ]; then
        ${PROJECT_NAME}-addlist -u $SELECTED_USERNAME -l "$LIST_NAME" \
                       -s "$LIST_SUBJECT" --public $LIST_PUBLIC
    else
        if [[ "$LIST_EMAIL" != *"@"* || "$LIST_EMAIL" != *"."* ]]; then
            dialog --title $"Add mailing list" \
                   --msgbox $"Unrecognised email address" 6 40
            return
        else
            ${PROJECT_NAME}-addlist -u $SELECTED_USERNAME -l "$LIST_NAME" \
                           -e "$LIST_EMAIL" --public $LIST_PUBLIC
        fi
    fi

    dialog --title $"Add mailing list" \
           --msgbox $"$LIST_NAME list was added" 6 40
}

function email_rule {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title $"Email rule for user $SELECTED_USERNAME" \
           --form "\n" 9 65 4 \
           $"When email arrives from address:" 1 1 "" 1 35 24 28 \
           $"Move to folder:" 2 1 "" 2 35 24 28 \
           $"Public:" 3 1 $"no" 3 35 4 25 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    RULE_EMAIL=$(cat $data | sed -n 1p)
    RULE_FOLDER=$(cat $data | sed -n 2p)
    RULE_PUBLIC=$(cat $data | sed -n 3p)

    if [ ${#RULE_PUBLIC} -lt 1 ]; then
        RULE_PUBLIC='no'
    fi
    if [[ $RULE_PUBLIC == $'y' || $RULE_PUBLIC == $'Y' || $RULE_PUBLIC == $'true' || $RULE_PUBLIC == $'True' || $RULE_PUBLIC == $'yes' || $RULE_PUBLIC == $'Yes' || $RULE_PUBLIC == $'YES' ]]; then
        RULE_PUBLIC='yes'
    else
        RULE_PUBLIC='no'
    fi
    if [ ${#RULE_EMAIL} -lt 2 ]; then
        dialog --title $"Add email rule" \
               --msgbox $"No email address was given" 6 40
        return
    fi
    if [ ${#RULE_FOLDER} -lt 2 ]; then
        dialog --title $"Add email rule" \
               --msgbox $"No folder name was given" 6 40
        return
    fi
    if [[ "$RULE_EMAIL" != *"@"* || "$RULE_EMAIL" != *"."* ]]; then
        dialog --title $"Add email rule" \
               --msgbox $"Unrecognised email address" 6 40
        return
    fi

    ${PROJECT_NAME}-addemail -u $SELECTED_USERNAME -e "$RULE_EMAIL" \
                   -g "$RULE_FOLDER" --public $RULE_PUBLIC
    dialog --title $"Add email rule" \
           --msgbox $"Email rule for $RULE_EMAIL was added" 6 40
}

function block_unblock_email {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    blockstr=$"Block/Unblock email going to"
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title "$blockstr $SELECTED_USERNAME" \
           --form "\n" 8 65 3 \
           $"When email arrives from address:" 1 1 "" 1 35 24 100 \
           $"Block it:" 2 1 "yes" 2 35 4 4 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    BLOCK_EMAIL=$(cat $data | sed -n 1p)
    BLOCK=$(cat $data | sed -n 2p)
    if [ ${#BLOCK_EMAIL} -lt 2 ]; then
        dialog --title $"Block/Unblock an email" \
               --msgbox $"No email address was given" 6 40
        return
    fi
    if [[ "$BLOCK_EMAIL" != *"@"* || "$BLOCK_EMAIL" != *"."* ]]; then
        dialog --title $"Block/Unblock an email" \
               --msgbox $"Unrecognised email address" 6 40
        return
    fi
    if [[ $BLOCK == "y"* || $BLOCK == "Y"* ]]; then
        ${PROJECT_NAME}-ignore -u $SELECTED_USERNAME -e "$BLOCK_EMAIL"
        dialog --title $"Block an email" \
               --msgbox "Email from $BLOCK_EMAIL to $SELECTED_USERNAME blocked" 6 75
    else
        ${PROJECT_NAME}-unignore -u $SELECTED_USERNAME -e "$BLOCK_EMAIL"
        dialog --title $"Unblock an email" \
               --msgbox "Email from $BLOCK_EMAIL to $SELECTED_USERNAME unblocked" 6 75
    fi
}

function block_unblock_subject {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    blockstr=$"Block/Unblock email going to"
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title "$blockstr $SELECTED_USERNAME" \
           --form "\n" 8 70 3 \
           $"When email arrives with subject text:" 1 1 "" 1 40 24 28 \
           $"Block it:" 2 1 "yes" 2 40 4 4 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    BLOCK_SUBJECT=$(cat $data | sed -n 1p)
    BLOCK=$(cat $data | sed -n 2p)
    if [ ${#BLOCK_SUBJECT} -lt 2 ]; then
        dialog --title $"Block/Unblock an email" \
               --msgbox $"No subject was given" 6 40
        return
    fi
    if [[ $BLOCK == "y"* || $BLOCK == "Y"* ]]; then
        ${PROJECT_NAME}-ignore -u $SELECTED_USERNAME -t "$BLOCK_SUBJECT"
        dialog --title $"Block an email" \
               --msgbox "Email with subject $BLOCK_SUBJECT to $SELECTED_USERNAME blocked" 6 40
    else
        ${PROJECT_NAME}-unignore -u $SELECTED_USERNAME -t "$BLOCK_SUBJECT"
        dialog --title $"Unblock an email" \
               --msgbox "Email with subject $BLOCK_SUBJECT to $SELECTED_USERNAME unblocked" 6 40
    fi
}

function create_keydrive_master {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    dialog --title $"USB Master Keydrive" \
           --msgbox $"Plug in a LUKS encrypted USB drive" 6 40
    clear
    ${PROJECT_NAME}-keydrive -u $SELECTED_USERNAME --master 'yes'
    any_key
}

function create_keydrive_fragment {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    dialog --title $"USB Fragment Keydrive" \
           --msgbox $"Plug in a LUKS encrypted USB drive" 6 40
    clear
    ${PROJECT_NAME}-keydrive -u $SELECTED_USERNAME
    any_key
}

function backup_data {
    dialog --title $"Backup data to USB" \
           --msgbox $"Plug in a LUKS encrypted USB drive" 6 40
    clear
    detect_usb_drive
    echo ''
    echo $"Detected USB drive $USB_DRIVE"
    echo ''
    echo $'Enter the passphrase for your LUKS encrypted backup drive:'
    ${PROJECT_NAME}-backup-local
    any_key
}

function restore_data_from_storage {
    restore_type="$1"

    AllStr=$"all"
    ExitStr=$"Exit"
    RestoreStr=$"Restore apps"

    if [[ $restore_type != "local" ]]; then
        restore_command="${PROJECT_NAME}-restore-remote $remote_domain_name configuration;;"
    else
        remote_domain_name="$1"
        detect_usb_drive
        restore_command="${PROJECT_NAME}-restore-local $USB_DRIVE"
        RestoreStr=$"Restore apps from USB drive $USB_DRIVE"
    fi

    utils_installed=(configfiles
                     mariadb
                     letsencrypt
                     passwords
                     mutt
                     gpg
                     procmail
                     spamassassin
                     readme
                     ssh
                     userconfig
                     userlocal
                     userfin
                     certs
                     personal
                     email)

    detect_apps

    while true
    do

        app_list=()
        n=1
        applist="$n $AllStr off"
        n=$[n+1]
        app_list+=("$AllStr")

        util_index=0
        for a in "${utils_installed[@]}"
        do
            applist="$applist $n $a off"
            app_name=${utils_installed[util_index]}
            n=$[n+1]
            util_index=$[util_index+1]
            app_list+=("$app_name")
        done

        app_index=0
        for a in "${APPS_INSTALLED_NAMES[@]}"
        do
            applist="$applist $n $a off"
            n=$[n+1]
            app_name=${APPS_INSTALLED_NAMES[app_index]}
            app_index=$[app_index+1]
            app_list+=("$app_name")
        done
        applist="$applist $n $ExitStr on"
        n=$[n+1]
        app_list+=("$ExitStr")

        choice=$(dialog --stdout --backtitle $"Freedombone" \
                        --title "$RestoreStr" \
                        --radiolist $'Choose:' \
                        30 50 20 $applist)

        if [ $? -ne 0 ]; then
            break
        fi
        app_index=$[choice-1]
        app_name=${app_list[app_index]}

        # exit
        if [[ "$app_name" == "$ExitStr" ]]; then
            break
        fi

        clear

        # Restore all
        if [[ "$app_name" == "$AllStr" ]]; then
            $restore_command
            retcode="$?"
            if [[ "$retcode" != "0" ]]; then
                if [[ "$1" == "local" ]]; then
                    dialog --title $"Restore all apps from USB" \
                           --msgbox $"Restore failed with code $retcode" 6 60
                else
                    dialog --title $"Restore all apps from $1" \
                           --msgbox $"Restore failed with code $retcode" 6 60
                fi
                break
            fi

            if [[ "$1" == "local" ]]; then
                dialog --title $"Restore all apps from USB" \
                       --msgbox $"Restore complete" 6 40
            else
                dialog --title $"Restore all apps from $1" \
                       --msgbox $"Restore complete" 6 40
            fi
            break
        fi

        # Restore an app
        $restore_command "${app_name}"
        retcode="$?"
        if [[ "$retcode" != "0" ]]; then
            dialog --title $"Restore apps from USB" \
                   --msgbox $"Restore of ${app_name} failed with code $retcode" 6 60
            return
        fi

        # finished
        if [[ "$1" == "local" ]]; then
            dialog --title $"Restore apps from USB" \
                   --msgbox $"Restore complete" 6 40
        else
            dialog --title $"Restore apps from $1" \
                   --msgbox $"Restore complete" 6 40
        fi

    done
}

function restore_data {
    dialog --title $"Restore data from USB" \
           --msgbox $"Plug in your backup USB drive" 6 40
    clear
    echo ' '
    echo $'Enter the passphrase for your LUKS encrypted backup drive:'
    restore_data_from_storage local
}

function restore_data_remote {
    if [ ! $ADMIN_USER ]; then
        dialog --title $"Restore data from remote server" \
               --msgbox $"Unknown admin user" 6 40
        return
    fi
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Restore from remote server" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $"Enter the domain name of the server from which you wish to restore" 8 60 2>$data
    sel=$?
    case $sel in
        0)
            friend_server_domain_name=$(<$data)

            if [ ${#friend_server_domain_name} -lt 2 ]; then
                return
            fi

            if [[ $friend_server_domain_name != *"."* ]]; then
                dialog --title $"Remote server domain name" \
                       --msgbox $"Invalid domain name" 6 40
                return
            fi

            restore_data_from_storage $friend_server_domain_name
            ;;
    esac
}

function ping_enable_disable {
    ping_str=$"\nDo you want to enable other systems to ping this machine?\n\nPing may be useful for diagnostic purposes, but for added security you may not want to enable it."
    enable_ping="no"
    dialog --title $"Enable Ping / ICMP" \
           --backtitle $"Freedombone Control Panel" \
           --defaultno \
           --yesno "$ping_str" 10 60
    sel=$?
    case $sel in
        0) enable_ping="yes";;
        255) return;;
    esac

    if [[ $enable_ping == "yes" ]]; then
        iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT
        iptables -A OUTPUT -p icmp --icmp-type echo-reply -j ACCEPT
        echo "0" >  /proc/sys/net/ipv4/icmp_echo_ignore_all
    else
        iptables -D INPUT -p icmp --icmp-type echo-request -j ACCEPT
        iptables -D OUTPUT -p icmp --icmp-type echo-reply -j ACCEPT
        echo "1" >  /proc/sys/net/ipv4/icmp_echo_ignore_all
    fi
}

function logging_on_off {
    logging="no"
    dialog --title $"Logging" \
           --backtitle $"Freedombone Control Panel" \
           --yesno $"\nDo you want to turn logging on?" 7 60
    sel=$?
    case $sel in
        0) logging="yes";;
        255) return;;
    esac

    clear
    echo ''
    echo $'This may take a few seconds. Please wait...'
    if [[ $logging == "no" ]]; then
        ${PROJECT_NAME}-logging off
    else
        ${PROJECT_NAME}-logging on
    fi
}

function restore_gpg_key {
    select_user
    if [ ! $SELECTED_USERNAME ]; then
        return
    fi
    restorestr=$"Restore GPG key for user"
    dialog --title "$restorestr $SELECTED_USERNAME" \
           --msgbox $"Plug in your USB keydrive" 6 40
    clear
    ${PROJECT_NAME}-recoverkey -u $SELECTED_USERNAME
    any_key
}

function security_settings {
    ${PROJECT_NAME}-sec
    any_key
}

function reset_tripwire {
    if [ ! -f /usr/bin/reset-tripwire ]; then
        return
    fi
    clear
    echo $'Resetting the Tripwire...'
    echo ' '
    echo '

                ' | reset-tripwire
    any_key
}

function format_drive {
    detect_usb_drive
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Format USB drive $USB_DRIVE" \
           --backtitle $"Freedombone Control Panel" \
           --defaultno \
           --yesno $"\nPlease confirm that you wish to format drive\n\n    ${USB_DRIVE}\n\nAll current data on the drive will be lost, and you will be prompted to give a password used to encrypt the drive.\n\nDANGER: If you screw up here and format the wrong drive it's your own fault!" 16 60
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac

    clear
    echo ''
    echo $"Formatting drive $USB_DRIVE. ALL CONTENTS WILL BE LOST."
    echo ''
    ${PROJECT_NAME}-format $USB_DRIVE
    any_key
}

function remove_backups {
    detect_usb_drive
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Remove backups from a USB drive $USB_DRIVE" \
           --backtitle $"Freedombone Control Panel" \
           --defaultno \
           --yesno $"\nPlease confirm that you wish to remove backups from this drive\n\n    ${drive}\n\nYou will not be able to recover them afterwards." 12 60
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac

    clear
    ${PROJECT_NAME}-backup-local $USB_DRIVE remove
    any_key
}

function shut_down_system {
    dialog --title $"Power off the system" \
           --backtitle $"Freedombone Control Panel" \
           --defaultno \
           --yesno $"\nPlease confirm that you wish to power off the system.\n\nWARNING: to power on again you will need to have physical access to the hardware." 10 60
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    shutdown now
}

function restart_system {
    dialog --title $"Restart the system" \
           --backtitle $"Freedombone Control Panel" \
           --defaultno \
           --yesno $"\nPlease confirm that you wish to restart the system.\n\nWARNING: If you are using full disk encryption then you will need physical access to the hardware to type in the password" 10 60
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    reboot
}

function change_system_name {
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Change the name of this system" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $'Enter a new name for this system on your local network\n\nIt will appear as newname.local' 10 60 2>$data
    sel=$?
    case $sel in
        0) NEW_SYSTEM_NAME=$(<$data)
           if [ "$NEW_SYSTEM_NAME" ]; then
               if [ ${#NEW_SYSTEM_NAME} -gt 1 ]; then
                   sed -i "s|host-name=.*|host-name=$NEW_SYSTEM_NAME|g" /etc/avahi/avahi-daemon.conf
                   systemctl restart avahi-daemon
                   if grep -q "host-name=$NEW_SYSTEM_NAME" /etc/avahi/avahi-daemon.conf; then
                       dialog --title $"New local network name" \
                              --msgbox $"The name of this system on your local network was changed successfully" 6 70
                   fi
               fi
           fi
           ;;
    esac
}

function set_dynamic_IP {
    revert_to_dynamic=
    dialog --title $"Return to using a dynamic IP address" \
           --backtitle $"Freedombone Control Panel" \
           --yesno $"\nDo you wish to go back to using a dynamic IP address?" 8 60
    sel=$?
    case $sel in
        0) revert_to_dynamic=1
           ;;
        1) return;;
    esac

    if [ $revert_to_dynamic ]; then
        wifi_original_network_settings
        clear
        echo ''
        echo $'Changing to a dynamic IP address.'
        echo ''
        echo $"System is rebooting. You may need to close this terminal and log in from a new one."
        reboot
    fi
}

function set_static_IP {
    IPv4_address=$(get_ipv4_address)
    IPv4_address_base=$(echo "$IPv4_address" | awk -F '.' '{print $1"."$2"."$3}')
    STATIC_IP="${IPv4_address_base}.60"
    STATIC_GATEWAY="${IPv4_address_base}.1"

    NEW_STATIC_IP=
    NEW_STATIC_GATEWAY=
    if grep -q 'iface eth0 inet static' /etc/network/interfaces; then
        STATIC_IP=$(cat /etc/network/interfaces | grep "address " | head -n 1 | awk -F ' ' '{print $2}')
        STATIC_GATEWAY=$(cat /etc/network/interfaces | grep "gateway " | head -n 1 | awk -F ' ' '{print $2}')
    fi

    # get the IP for the box
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Set a static local IP address" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $"In order to forward incoming internet traffic to this system most internet routers need to know a static local IP address to send the data to.\n\n
Enter a static local IP address for this system.\n\nIt will typically be ${IPv4_address_base}.x\n\nIf you leave this field blank then the system will revert to using a dynamic IP address." 18 60 "$STATIC_IP" 2>$data
    sel=$?
    case $sel in
        0) NEW_STATIC_IP=$(<$data)
           if [[ "$NEW_STATIC_IP" != *"."* ]]; then
               set_dynamic_IP
               return
           fi
           ;;
        1) return;;
    esac

    # get the gateway
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Set the IP address of your internet router/modem" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $"Set the local IP address for your internet router or ADSL modem.\n\nIt will typically be ${IPv4_address_base}.1, ${IPv4_address_base}.254, or similar" 12 60 "$STATIC_GATEWAY" 2>$data
    sel=$?
    case $sel in
        0) NEW_STATIC_GATEWAY=$(<$data)
           if [[ "$NEW_STATIC_GATEWAY" != *"."* ]]; then
               return
           fi
           ;;
        1) return;;
    esac

    if [[ "$NEW_STATIC_GATEWAY" == *"."* && "$NEW_STATIC_IP" == *"."* ]]; then
        ip_addresses_have_changed=
        if ! grep -q "address ${NEW_STATIC_IP}" /etc/network/interfaces; then
            ip_addresses_have_changed=1
        fi
        if ! grep -q "gateway ${NEW_STATIC_GATEWAY}" /etc/network/interfaces; then
            ip_addresses_have_changed=1
        fi
        if [ $ip_addresses_have_changed ]; then
            write_config_param "NETWORK_IS_STATIC" "1"
            write_config_param "LOCAL_NETWORK_STATIC_IP_ADDRESS" "$NEW_STATIC_IP"
            write_config_param "ROUTER_IP_ADDRESS" "$NEW_STATIC_GATEWAY"

            email_change_relay "$NEW_STATIC_IP"

            static_wifi_address=
            if [[ $(config_param_exists "WIFI_INTERFACE") == "1" ]]; then
                dialog --title $"Static local IP address" \
                       --backtitle $"Freedombone Control Panel" \
                       --yesno $"\nSet a static address for the wifi adapter?\n\nIf you select 'no' then wired ethernet will be used." 10 60
                sel=$?
                case $sel in
                    0) static_wifi_address=1
                       write_config_param "NETWORK_IS_STATIC" "1"
                       ;;
                esac
            fi

            if [ ! $static_wifi_address ]; then
                # wired network
                remove_wifi_startup_script
                echo '# This file describes the network interfaces available on your system' > /etc/network/interfaces
                echo '# and how to activate them. For more information, see interfaces(5).' >> /etc/network/interfaces
                echo '' >> /etc/network/interfaces
                echo '# The loopback network interface' >> /etc/network/interfaces
                echo 'auto lo' >> /etc/network/interfaces
                echo 'iface lo inet loopback' >> /etc/network/interfaces
                echo '' >> /etc/network/interfaces
                echo '# The primary network interface' >> /etc/network/interfaces
                echo 'auto eth0' >> /etc/network/interfaces
                echo 'iface eth0 inet static' >> /etc/network/interfaces
                echo "    address ${NEW_STATIC_IP}" >> /etc/network/interfaces
                echo '    netmask 255.255.255.0' >> /etc/network/interfaces
                echo "    gateway ${NEW_STATIC_GATEWAY}" >> /etc/network/interfaces
                echo "    dns-nameservers 213.73.91.35 85.214.20.141" >> /etc/network/interfaces
                echo '# Example to keep MAC address between reboots' >> /etc/network/interfaces
                echo '#hwaddress ether DE:AD:BE:EF:CA:FE' >> /etc/network/interfaces
                echo '' >> /etc/network/interfaces
                echo '# The secondary network interface' >> /etc/network/interfaces
                echo '#auto eth1' >> /etc/network/interfaces
                echo '#iface eth1 inet dhcp' >> /etc/network/interfaces
                echo '' >> /etc/network/interfaces
                echo '# WiFi Example' >> /etc/network/interfaces
                echo "#auto $WIFI_INTERFACE" >> /etc/network/interfaces
                echo "#iface $WIFI_INTERFACE inet dhcp" >> /etc/network/interfaces
                echo '#    wpa-ssid "essid"' >> /etc/network/interfaces
                echo '#    wpa-psk  "password"' >> /etc/network/interfaces
                echo '' >> /etc/network/interfaces
                echo '# Ethernet/RNDIS gadget (g_ether)' >> /etc/network/interfaces
                echo '# ... or on host side, usbnet and random hwaddr' >> /etc/network/interfaces
                echo '# Note on some boards, usb0 is automaticly setup with an init script' >> /etc/network/interfaces
                echo '#iface usb0 inet static' >> /etc/network/interfaces
                echo '#    address 192.168.7.2' >> /etc/network/interfaces
                echo '#    netmask 255.255.255.0' >> /etc/network/interfaces
                echo '#    network 192.168.7.0' >> /etc/network/interfaces
                echo '#    gateway 192.168.7.1' >> /etc/network/interfaces
            else
                # wifi network
                wifi_settings
            fi

            clear
            echo ''
            echo $'Restarting the network daemon.'
            echo ''
            echo $'If you logged in using the previous IP address then you may need to close this terminal and log in again on the new one.'

            function_check pihole_change_ipv4
            pihole_change_ipv4 ${NEW_STATIC_IP}

            dialog --title $"Static local IP address" \
                   --backtitle $"Freedombone Control Panel" \
                   --yesno $"\nFor the change to take effect your system will now need to reboot. Do this now?" 8 60
            sel=$?
            case $sel in
                0) reboot;;
            esac
        fi
    fi
}

function wifi_settings {
    if [ -f /etc/hostapd/hostapd.conf ]; then
        return
    fi

    TEMP_WIFI_NETWORKS_FILE=~/.temp-${PROJECT_NAME}-wifi.cfg
    ${PROJECT_NAME}-wifi --networksinteractive $TEMP_WIFI_NETWORKS_FILE
    if [ -f $TEMP_WIFI_NETWORKS_FILE ]; then
        cp $TEMP_WIFI_NETWORKS_FILE $WIFI_NETWORKS_FILE
        rm $TEMP_WIFI_NETWORKS_FILE
        ${PROJECT_NAME}-wifi --networks $WIFI_NETWORKS_FILE
        create_wifi_startup_script
        if [[ $(wifi_is_running) == "1" ]]; then
            dialog --title $"Wifi Settings" \
                   --msgbox $"Wifi settings were changed." 6 60
        else
            dialog --title $"Wifi Settings" \
                   --msgbox $"Wifi settings were changed. You will need to restart the system with ethernet cable removed for the changes to take effect." 7 60
        fi
    else
        remove_wifi_startup_script
    fi
}

function wifi_edit_networks {
    if [ -f /etc/hostapd/hostapd.conf ]; then
        return
    fi
    if [ ! -f $WIFI_NETWORKS_FILE ]; then
        echo $'# Add wifi networks as follows:' > $WIFI_NETWORKS_FILE
        echo '#' >> $WIFI_NETWORKS_FILE
        echo $'# MySSID' >> $WIFI_NETWORKS_FILE
        echo $'# wpa2-psk' >> $WIFI_NETWORKS_FILE
        echo $'# myWifiPassphrase' >> $WIFI_NETWORKS_FILE
        echo '#' >> $WIFI_NETWORKS_FILE
        echo $'# AnotherSSID' >> $WIFI_NETWORKS_FILE
        echo $'# none' >> $WIFI_NETWORKS_FILE
        echo '#' >> $WIFI_NETWORKS_FILE
    fi
    editor $WIFI_NETWORKS_FILE
    ${PROJECT_NAME}-wifi --networks $WIFI_NETWORKS_FILE
}

function hotspot_settings {
    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title $"Hotspot Settings" \
           --form $"" 10 60 4 \
           $"Enabled (yes/no):" 1 1 "$WIFI_HOTSPOT" 1 24 5 5 \
           $"SSID:" 2 1 "$WIFI_SSID" 2 24 256 256 \
           $"Type (wpa2-psk/none):" 3 1 "$WIFI_TYPE" 3 24 10 10 \
           $"Passphrase:" 4 1 "$WIFI_PASSPHRASE" 4 24 256 256 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    TEMP_WIFI_HOTSPOT=$(cat $data | sed -n 1p)
    TEMP_WIFI_SSID=$(cat $data | sed -n 2p)
    TEMP_WIFI_TYPE=$(cat $data | sed -n 3p)
    TEMP_WIFI_PASSPHRASE=$(cat $data | sed -n 4p)

    if [ ${#TEMP_WIFI_SSID} -lt 2 ]; then
        return
    fi
    if [ ${#TEMP_WIFI_TYPE} -lt 2 ]; then
        return
    fi

    WIFI_EXTRA=''
    if [[ $TEMP_WIFI_HOTSPOT == $'yes' || $TEMP_WIFI_HOTSPOT == $'y' || $TEMP_WIFI_HOTSPOT == $'on' ]]; then
        TEMP_WIFI_HOTSPOT='yes'
    else
        TEMP_WIFI_HOTSPOT='no'
        if [ -f $WIFI_NETWORKS_FILE ]; then
            WIFI_EXTRA='--networks $WIFI_NETWORKS_FILE'
        fi
    fi

    if [[ $TEMP_WIFI_TYPE != $'none' ]]; then
        if [ ! $TEMP_WIFI_PASSPHRASE ]; then
            dialog --title $"Wifi Settings" \
                   --msgbox $"No wifi hotspot passphrase was given" 6 40
            return
        fi
        if [ ${#TEMP_WIFI_PASSPHRASE} -lt 2 ]; then
            dialog --title $"Wifi Settings" \
                   --msgbox $"Wifi hotspot passphrase was too short" 6 40
            return
        fi

        WIFI_HOTSPOT=$TEMP_WIFI_HOTSPOT
        WIFI_SSID=$TEMP_WIFI_SSID
        WIFI_TYPE=$TEMP_WIFI_TYPE
        WIFI_PASSPHRASE=$TEMP_WIFI_PASSPHRASE

        ${PROJECT_NAME}-wifi -i $WIFI_INTERFACE -s $WIFI_SSID -t $WIFI_TYPE -p $WIFI_PASSPHRASE --hotspot $WIFI_HOTSPOT $WIFI_EXTRA
    else
        WIFI_HOTSPOT=$TEMP_WIFI_HOTSPOT
        WIFI_SSID=$TEMP_WIFI_SSID
        WIFI_TYPE=$TEMP_WIFI_TYPE
        WIFI_PASSPHRASE=$TEMP_WIFI_PASSPHRASE

        ${PROJECT_NAME}-wifi -i $WIFI_INTERFACE -s $WIFI_SSID -t $WIFI_TYPE --hotspot $WIFI_HOTSPOT $WIFI_EXTRA
    fi

    # store any changes
    write_config_param "WIFI_HOTSPOT" "$WIFI_HOTSPOT"
    write_config_param "WIFI_SSID" "$WIFI_SSID"
    write_config_param "WIFI_TYPE" "$WIFI_TYPE"
    write_config_param "WIFI_PASSPHRASE" "$WIFI_PASSPHRASE"

    dialog --title $"Wifi Settings" \
           --msgbox $"Hotspot settings were changed" 6 40
}

function reinstall_mariadb {
    dialog --title $"Reinstall MariaDB" \
           --backtitle $"Freedombone Control Panel" \
           --defaultno \
           --yesno $"\nThis should be a LAST RESORT, if the mysql daemon won't start. You will lose ALL databases and will then need to restore them from backup.\n\nAre you sure that you wish to continue?" 12 60
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac

    clear
    database_reinstall

    dialog --title $"Reinstall MariaDB" \
           --msgbox $"MariaDB has been reinstalled" 6 40
}

function show_firewall {
    clear
    echo $"Firewall Settings"
    echo ''
    while read line; do
        firewall_name=$(echo "$line" | awk -F '=' '{print $1}')
        firewall_port=$(echo "$line" | awk -F '=' '{print $2}')
        echo -n -e "$(pad_string ${firewall_name})"
        echo "${firewall_port}"
    done < $FIREWALL_CONFIG
    any_key
}

function email_extra_domains {
    email_hostnames=$(cat /etc/exim4/update-exim4.conf.conf | grep "dc_other_hostnames" | awk -F "'" '{print $2}')

    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --title $"Email Domains" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $"Enter the list of email domains to use, separated by semicolons" 8 60 $email_hostnames 2>$data
    sel=$?
    case $sel in
        0)
            emailhostnames=$(<$data)
            if [ ${#emailhostnames} -gt 2 ]; then
                if [[ "$email_hostnames" != "$emailhostnames" ]]; then
                    if [[ "$emailhostnames" == *"."* ]]; then
                        if [[ "$emailhostnames" != *" "* ]]; then
                            sed -i "s|dc_other_hostnames=.*|dc_other_hostnames='$emailhostnames'|g" /etc/exim4/update-exim4.conf.conf
                            update-exim4.conf
                            dpkg-reconfigure --frontend noninteractive exim4-config
                            systemctl restart saslauthd
                            dialog --title $"Email Domains" \
                                   --backtitle $"Freedombone Control Panel" \
                                   --msgbox $"Email domains were changed" 6 50
                        else
                            dialog --title $"Email Domains not set" \
                                   --backtitle $"Freedombone Control Panel" \
                                   --msgbox $"There should be no spaces in the list" 6 50
                        fi
                    fi
                fi
            fi
            ;;
    esac
}

function email_smtp_proxy {
    MUTTRC_FILE=/home/$ADMIN_USER/.muttrc
    if [ ! -f $MUTTRC_FILE ]; then
        return
    fi

    data=$(tempfile 2>/dev/null)
    trap "rm -f $data" 0 1 2 5 15
    dialog --backtitle $"Freedombone Control Panel" \
           --title $"SMTP Proxy for $ADMIN_USER" \
           --form $"You may need to proxy outgoing email via your ISP's mail server. If so enter the details below." 14 75 6 \
           $"Enable proxy:" 1 1 "$SMTP_PROXY_ENABLE" 1 24 5 5 \
           $"Protocol (smtp/smtps):" 2 1 "$SMTP_PROXY_PROTOCOL" 2 24 5 5 \
           $"ISP mail server:" 3 1 "$SMTP_PROXY_SERVER" 3 24 40 10000 \
           $"Port:" 4 1 "$SMTP_PROXY_PORT" 4 24 5 5 \
           $"Username:" 5 1 "$SMTP_PROXY_USERNAME" 5 24 40 10000 \
           $"Password:" 6 1 "$SMTP_PROXY_PASSWORD" 6 24 40 10000 \
           2> $data
    sel=$?
    case $sel in
        1) return;;
        255) return;;
    esac
    SMTP_PROXY_ENABLE=$(cat $data | sed -n 1p)
    SMTP_PROXY_PROTOCOL=$(cat $data | sed -n 2p)
    SMTP_PROXY_SERVER=$(cat $data | sed -n 3p)
    SMTP_PROXY_PORT=$(cat $data | sed -n 4p)
    SMTP_PROXY_USERNAME=$(cat $data | sed -n 5p)
    SMTP_PROXY_PASSWORD=$(cat $data | sed -n 6p)

    # change muttrc
    if [ $SMTP_PROXY_ENABLE != $'no' ]; then
        if ! grep "set smtp_url" $MUTTRC_FILE; then
            echo "set smtp_url=\"${SMTP_PROXY_PROTOCOL}://${SMTP_PROXY_USERNAME}:${SMTP_PROXY_PASSWORD}@${SMTP_PROXY_SERVER}:${SMTP_PROXY_PORT}/\"" >> $MUTTRC_FILE
        else
            sed -i "s|set smtp_url=.*|set smtp_url=\"${SMTP_PROXY_PROTOCOL}://${SMTP_PROXY_USERNAME}:${SMTP_PROXY_PASSWORD}@${SMTP_PROXY_SERVER}:${SMTP_PROXY_PORT}/\"|g" $MUTTRC_FILE
        fi
        sed -i 's|#set smtp_url|set smtp_url|g' $MUTTRC_FILE
    else
        if grep "set smtp_url" $MUTTRC_FILE; then
            sed -i 's|set smtp_url|#set smtp_url|g' $MUTTRC_FILE
        fi
    fi

    # save settings within the main configuration file
    write_config_param "SMTP_PROXY_ENABLE" "$SMTP_PROXY_ENABLE"
    write_config_param "SMTP_PROXY_PROTOCOL" "$SMTP_PROXY_PROTOCOL"
    write_config_param "SMTP_PROXY_SERVER" "$SMTP_PROXY_SERVER"
    write_config_param "SMTP_PROXY_PORT" "$SMTP_PROXY_PORT"
    write_config_param "SMTP_PROXY_USERNAME" "$SMTP_PROXY_USERNAME"
    write_config_param "SMTP_PROXY_PASSWORD" "$SMTP_PROXY_PASSWORD"
}

function menu_backup_restore {
    while true
    do
        data=$(tempfile 2>/dev/null)
        trap "rm -f $data" 0 1 2 5 15
        dialog --backtitle $"Freedombone Control Panel" \
               --title $"Backup and Restore" \
               --radiolist $"Choose an operation:" 19 70 12 \
               1 $"Backup data to USB drive" off \
               2 $"Restore GPG key from USB keydrive" off \
               3 $"Restore data from USB drive" off \
               4 $"Reinstall mariadb" off \
               5 $"Configure remote backups" off \
               6 $"Restore from remote backup" off \
               7 $"Backup GPG key to USB (master keydrive)" off \
               8 $"Backup GPG key to USB (fragment keydrive)" off \
               9 $"Format a USB drive (LUKS encrypted)" off \
               10 $"Remove backups from a USB drive" off \
               11 $"Back to main menu" on 2> $data
        sel=$?
        case $sel in
            1) break;;
            255) break;;
        esac
        case $(cat $data) in
            1) backup_data;;
            2) restore_gpg_key;;
            3) restore_data;;
            4) reinstall_mariadb;;
            5) configure_remote_backups;;
            6) restore_data_remote;;
            7) create_keydrive_master;;
            8) create_keydrive_fragment;;
            9) format_drive;;
            10) remove_backups;;
            11) break;;
        esac
    done
}

function menu_email {
    while true
    do
        data=$(tempfile 2>/dev/null)
        trap "rm -f $data" 0 1 2 5 15
        dialog --backtitle $"Freedombone Control Panel" \
               --title $"Email Menu" \
               --radiolist $"Choose an operation:" 15 70 8 \
               1 $"Add a user to a mailing list" off \
               2 $"Remove a user from a mailing list" off \
               3 $"Add an email rule" off \
               4 $"Block/Unblock an email address" off \
               5 $"Block/Unblock email with subject text" off \
               6 $"Outgoing Email Proxy" off \
               7 $"Extra email domains" off \
               8 $"Back to main menu" on 2> $data
        sel=$?
        case $sel in
            1) break;;
            255) break;;
        esac
        case $(cat $data) in
            1) add_to_mailing_list;;
            2) remove_user_from_mailing_list;;
            3) email_rule;;
            4) block_unblock_email;;
            5) block_unblock_subject;;
            6) email_smtp_proxy;;
            7) email_extra_domains;;
            8) break;;
        esac
    done
}

function menu_users {
    while true
    do
        data=$(tempfile 2>/dev/null)
        trap "rm -f $data" 0 1 2 5 15
        dialog --backtitle $"Freedombone Control Panel" \
               --title $"Manage Users" \
               --radiolist $"Choose an operation:" 12 70 5 \
               1 $"Add a user" off \
               2 $"Delete a user" off \
               3 $"Change user password" off \
               4 $"Change user ssh public key" off \
               5 $"Back to main menu" on 2> $data
        sel=$?
        case $sel in
            1) break;;
            255) break;;
        esac
        case $(cat $data) in
            1) add_user;;
            2) delete_user;;
            3) change_password;;
            4) change_ssh_public_key;;
            5) break;;
        esac
    done
}

function wifi_enable {
    disable_wifi='yes'
    dialog --title $"Enable Wifi" \
           --backtitle $"Freedombone Control Panel" \
           --defaultno \
           --yesno $"\nDo you wish to enable wifi?" 10 50
    sel=$?
    case $sel in
        0) disable_wifi='no';;
        1) disable_wifi='yes';;
        255) return;;
    esac
    ${PROJECT_NAME}-wifi --disable $disable_wifi
}

function menu_wifi {
    if [[ "$(wifi_exists)" == "0" ]]; then
        dialog --title $"Wifi" \
               --msgbox $"No wifi adaptors were detected" 6 40
        return
    fi

    while true
    do
        status_str=$'Wifi OFF'
        if [ -f /etc/hostapd/hostapd.conf ]; then
            status_str=$'Hotspot ON'
        else
            if grep -q "# wifi enabled" /etc/network/interfaces; then
                status_str=$'Wifi ON'
            fi
        fi

        data=$(tempfile 2>/dev/null)
        trap "rm -f $data" 0 1 2 5 15
        dialog --backtitle $"Freedombone Control Panel" \
               --title $"Wifi Menu" \
               --radiolist $"${status_str}\n\nChoose an operation:" 14 70 6 \
               1 $"Enable or disable Wifi" off \
               2 $"Configure wifi networks" off \
               3 $"Manually edit wifi networks file" off \
               4 $"Hotspot settings" off \
               5 $"Exit" on 2> $data
        sel=$?
        case $sel in
            1) break;;
            255) break;;
        esac
        case $(cat $data) in
            1) wifi_enable;;
            2) wifi_settings;;
            3) wifi_edit_networks;;
            4) hotspot_settings;;
            5) break;;
        esac
    done
}

function menu_app_settings {
    detect_installable_apps

    applist=""
    appnames=()
    n=1
    app_index=0
    for a in "${APPS_AVAILABLE[@]}"
    do
        if [[ ${APPS_INSTALLED[$app_index]} != "0" ]]; then
            if [[ $(function_exists configure_interactive_${a}) == "1" ]]; then
                applist="$applist $n $a off"
                n=$[n+1]
                appnames+=("$a")
            fi
        fi
        app_index=$[app_index+1]
    done
    if [ $n -le 1 ]; then
        return
    fi
    backstr=$'Exit'
    applist="$applist $n $backstr on"
    appnames+=("Exit")

    choice=$(dialog --stdout --backtitle $"Freedombone" \
                    --title $"Change Settings for an App" \
                    --radiolist $'Choose:' \
                    16 40 20 $applist)

    if [ $? -eq 0 ]; then
        app_index=$[choice-1]
        chosen_app=${appnames[$app_index]}
        if [[ $chosen_app != "Exit" ]]; then
            configure_interactive_${chosen_app}
        fi
    fi
}

function menu_top_level {
    while true
    do
        data=$(tempfile 2>/dev/null)
        trap "rm -f $data" 0 1 2 5 15
        dialog --backtitle $"Freedombone Control Panel" \
               --title $"Control Panel" \
               --radiolist $"Choose an operation:" 28 70 21 \
               1 $"About this system" off \
               2 $"Passwords" off \
               3 $"Backup and Restore" off \
               4 $"Show Firewall" off \
               5 $"Reset Tripwire" off \
               6 $"App Settings" off \
               7 $"Add/Remove Apps" off \
               8 $"Logging on/off" off \
               9 $"Ping enable/disable" off \
               10 $"Manage Users" off \
               11 $"Email Menu" off \
               12 $"Security Settings" off \
               13 $"Set the main repository (repo mirrors)" off \
               14 $"Change the name of this system" off \
               15 $"Set a static local IP address" off \
               16 $"Wifi menu" off \
               17 $"Check for updates" off \
               18 $"Power off the system" off \
               19 $"Restart the system" off \
               20 $"Exit" on 2> $data
        sel=$?
        case $sel in
            1) exit 1;;
            255) exit 1;;
        esac
        case $(cat $data) in
            1) show_about;;
            2) view_or_change_passwords;;
            3) menu_backup_restore;;
            4) show_firewall;;
            5) reset_tripwire;;
            6) menu_app_settings;;
            7) ${PROJECT_NAME}-addremove;;
            8) logging_on_off;;
            9) ping_enable_disable;;
            10) menu_users;;
            11) menu_email;;
            12) security_settings;;
            13) set_main_repo;;
            14) change_system_name;;
            15) set_static_IP;;
            16) menu_wifi;;
            17) check_for_updates;;
            18) shut_down_system;;
            19) restart_system;;
            20) break;;
        esac
    done
}

if [[ $USER != 'root' ]]; then
    # show the user version of the control panel
    ${PROJECT_NAME}-controlpanel-user
    exit 0
fi

if [ ! -f $COMPLETION_FILE ]; then
    echo $'This command should only be run on an installed Freedombone system'
    exit 1
fi

ADMIN_USER=$(get_completion_param "Admin user")
read_repo_servers
menu_top_level
clear
cat /etc/motd
exit 0