#!/usr/bin/env bash
set -euo pipefail

memory=$(free -h | awk '/Mem:/ {print $3 " / " $2}')
network=$(networkctl is-online --quiet && echo ONLINE || echo OFFLINE)
gpu=$(lspci | awk '/VGA|3D controller/ {print $0; exit}')

issue=$(mktemp /etc/issue.XXXXXX)
trap 'rm -f "$issue"' EXIT
cat >"$issue" <<EOF

                         /\\
                        /__\\

                    SYSTEM ACCESS

  HOST     $(hostname)
  KERNEL   $(uname -r)
  MEMORY   $memory
  NETWORK  $network
  GPU      ${gpu:-UNAVAILABLE}

EOF
install -m 0644 "$issue" /etc/issue