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

export DISPLAY="${DISPLAY:-:0}"
if [ -z "${XAUTHORITY:-}" ] && [ -r "$HOME/.Xauthority" ]; then
  export XAUTHORITY="$HOME/.Xauthority"
fi

if pgrep -u "$UID" -f 'polkit-gnome-authentication-agent-1|polkit-kde-authentication-agent-1|lxqt-policykit-agent|polkit-mate-authentication-agent-1|xfce-polkit' >/dev/null 2>&1; then
  exit 0
fi

agents=(
  /usr/lib/polkit-gnome/polkit-gnome-authentication-agent-1
  /usr/lib/polkit-kde-authentication-agent-1
  /usr/lib/lxqt-policykit/lxqt-policykit-agent
  /usr/bin/lxqt-policykit-agent
  /usr/lib/mate-polkit/polkit-mate-authentication-agent-1
  /usr/lib/xfce-polkit/xfce-polkit
)

for agent in "${agents[@]}"; do
  if [ -x "$agent" ]; then
    exec "$agent"
  fi
done

echo "No supported polkit authentication agent found" >&2
exit 1