#!/bin/sh

QR="$(zbarcam -q -1)"
Wifi="${QR#*:*:*:}"
AP="${Wifi%%;*}"
Passphrase="${Wifi##*;P:}"
Passphrase="${Passphrase%%;*}"

wpa_passphrase "$AP" "$Passphrase"
>&2 printf 'Continue ?'
head -n 1

wpa_passphrase "$AP" "$Passphrase" >> /etc/wpa_supplicant/wpa_supplicant.conf