Dialog to wifi..

#!/usr/bin/env bash

TEMPFILE=$(mktemp /tmp/wifi_config.XXXXXX)

function connect_to_wifi() {
    wpa_passphrase "$SSID" "$PASSPHRASE" > /etc/wpa_supplicant/wpa_supplicant.conf
    wpa_supplicant -B -i "$INTERFACE" -c /etc/wpa_supplicant/wpa_supplicant.conf
    dhclient "$INTERFACE"
}

function display_form() {
    dialog --title "WiFi Connection" \
           --form "Enter WiFi SSID and passphrase" \
           10 50 0 \
           "SSID:" 1 1 "$SSID" 1 20 30 0 \
           "Passphrase:" 2 1 "$PASSPHRASE" 2 20 30 0 \
           2> "$TEMPFILE"

    SSID=$(sed -n 1p "$TEMPFILE")
    PASSPHRASE=$(sed -n 2p "$TEMPFILE")
}

# Entry Point..
function main() {
    # Default values, Change to your values
    INTERFACE="<your_interface>"
    SSID=""
    PASSPHRASE=""

    # Display the form
    display_form

    # Check if the user pressed OK or Cancel
    case $? in
        0)  # OK button pressed
            connect_to_wifi
            dialog --title "Success" --msgbox "Connected to WiFi!" 8 30
            ;;
        1)  # Cancel button pressed
            dialog --title "Cancelled" --msgbox "Operation cancelled." 8 30
            ;;
        255) # Escape key pressed or dialog closed
            dialog --title "Cancelled" --msgbox "Operation cancelled." 8 30
            ;;
    esac

    # Clean up temporary files
    rm -f "$TEMPFILE"
}

main