2 # I, Ian Kelling, follow the GNU license recommendations at
3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
4 # recommend that small programs, < 300 lines, be licensed under the
5 # Apache License 2.0. This file contains or is part of one or more small
6 # programs. If a small program grows beyond 300 lines, I plan to switch
9 # Copyright 2024 Ian Kelling
11 # Licensed under the Apache License, Version 2.0 (the "License");
12 # you may not use this file except in compliance with the License.
13 # You may obtain a copy of the License at
15 # http://www.apache.org/licenses/LICENSE-2.0
17 # Unless required by applicable law or agreed to in writing, software
18 # distributed under the License is distributed on an "AS IS" BASIS,
19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20 # See the License for the specific language governing permissions and
21 # limitations under the License.
24 # When the system boots, systemd-resolved seems to recreate /run/systemd/resolve,
25 # or something, because the bindmounts to that directory do not always exist
26 # for units starting up at the same time. Anyways, removing and creating that
27 # directory definitely has the effect of deleting the bindmount, so
28 # here I solve for that ever happening.
30 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
31 shopt -s inherit_errexit
2>/dev
/null ||
: # ignore fail in bash < 4.4
33 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
35 if (( $# == 0 )); then
36 echo error
: expected service argument
>&2
40 [[ $EUID == 0 ]] ||
exec sudo
-E "${BASH_SOURCE[0]}" "$@"
46 pid
=$
(systemctl show
--property MainPID
--value $unit 2>/dev
/null ||
:)
49 if ! nsenter
-t $pid -m timeout
20 mountpoint
/run
/systemd
/resolve
&>/dev
/null
; then
50 echo mail bind restart of
$unit
51 timeout
60 systemctl restart
$unit ||
: