#!/bin/bash
# Copyright (C) 2016 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.


# Running these files directly won't be good since we are
# unmounting the volume they live on.
# This never really get's run, since we normally only
# seed these files to other hosts using btrbk-run.


set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR

[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"

x="$(readlink -f -- "${BASH_SOURCE[0]}")"; cd ${x%/*} # directory of this file


# scripts that would interfere with unmounting /a, put them elsewhere.
# note: previously used the install command, but it had this habit of
# like, once a month or so the files would be "not found" by a script
# trying to use them, within a few minute of the last time this
# ran. Very strange, dunno why, but rsync won't do anything unless these
# changed, so that should fix it.
/a/bin/log-quiet/setup
rsync -t --chmod=755 --chown=root:root switch-mail-host btrbk-run mount-latest-subvol \
      check-subvol-stale myi3status mailtest-check \
      mailbindwatchdog \
      check-mailq \
      unsaved-buffers.el \
      mail-backup-clean \
      iptables-exim \
      ip6tables-exim \
      exim-nn-iptables \
      check-crypttab \
      /usr/local/bin
rsync -t --chmod=755 --chown=root:root /a/bin/errhandle/err /usr/local/lib

cmd=( rsync -aiSAX --chown=root:root --chmod=g-s
      epanic-clean
      system-status
      btrfsmaint
      dynamic-ip-update /usr/local/bin
    )

sre() {
  service=$1
  if [[ $(systemctl is-active $1.service ||:) != inactive ]]; then
    # just fire and forget. sometimes a script restart can fail, but then
    # then auto restart mechanism makes it succeed.
    systemctl restart $service ||: &
  fi

}

while read -r line; do
  file="${line:12}"
  case $file in
    btrfsmaint)
      sre btrfsmaintstop &
      ;;
    *)
      sre ${file//-/} &
      ;;
  esac
done < <("${cmd[@]}")