#!/bin/bash
# I, Ian Kelling, follow the GNU license recommendations at
# https://www.gnu.org/licenses/license-recommendations.en.html. They
# recommend that small programs, < 300 lines, be licensed under the
# Apache License 2.0. This file contains or is part of one or more small
# programs. If a small program grows beyond 300 lines, I plan to switch
# its license to GPL.

# Copyright 2024 Ian Kelling

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

source /a/bin/bash-bear-trap/bash-bear

resolvuid=$(id -u systemd-resolve)
case $EUID in
  0|$resolvuid) : ;;
  *) exec sudo -E "${BASH_SOURCE[0]}" "$@" ;;
esac


if ! resolvectl dnsovertls tunfsf &>/dev/null; then
  ## most likely the interface doesnt exist. if we wanted verbose output, then:
  # echo failed resolvectl dnsovertls tunfsf. rerunning:
  # resolvectl dnsovertls tunfsf ||:
  exit 0
fi
read -r _ link _ < <(resolvectl dnsovertls tunfsf)
busctl call org.freedesktop.resolve1 /org/freedesktop/resolve1 org.freedesktop.resolve1.Manager SetLinkDNSOverTLS is $link no