Generate a WiFi-auto-connect qrcode

qr-wifi.sh

#!/usr/bin/env bash

usage() { echo "Usage: $0 [-o <output file>] [-n <wifi name>] [-p <password>] [-t <WPA|WEP>]" 1>&2; exit 1; }

while getopts ":n:p:t:o:h" param; do
    case "${param}" in
        n)
            n="${OPTARG}"
            ;;
        p)
            p="${OPTARG}"
            ;;
        t)
            t="${OPTARG^^}"
            [[ "${t^^}" == "WPA" ]] || [[ "${t^^}" == "WEP" ]] || usage
            ;;
        o)
            o="${OPTARG}"
            ;;
        *)
            usage
            ;;
    esac
done
shift $((OPTIND-1))

[ ! -z "${n}" ] || read -p "WiFi name: " n 

[ ! -z "${p}" ] || read -p "WiFi password: " p

if [ -z "${t}" ]; then
    read -p "Security type. WPA or WEP: " t
    [ "${t^^}" == 'WPA'] || [ "${t^^}" == 'WEP' ] || usage
    t=$(echo "${t^^}")
fi

[ ! -z "${o}" ] || read -p "Output file path: " o

qrencode -o "${o}" "WIFI:S:${n};T:${t};P:${p};;"