#!/bin/bash
# Copyright (C) 2019 Ian Kelling
# SPDX-License-Identifier: AGPL-3.0-or-later

if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi

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

hn=$(hostname -f)
source /a/bin/bash_unpublished/source-state
if [[ $HOSTNAME == "$MAIL_HOST" || $hn == li.b8.nz ]]; then
  exit 0
fi

cmd="$s /usr/sbin/checkrestart -p"
if [[ $($cmd | sed '/^Found 0 processes using old versions of upgraded files$/d' | wc -l) != 0 ]]; then
  $cmd -v | pee cat "wall -n"
fi

if [[ -s /var/log/checkrestart.log ]]; then
  for x in {30..1}; do
    echo "pid $PID. unattended upgrade, rebooting in $((x*10)) seconds" | wall -n
    sleep 10
  done
  for x in {30..1}; do
    if ! fuser /var/lib/dpkg/lock &> /dev/null; then
      /sbin/reboot
      exit 0
    fi
    echo "pid $PID. unattended upgrade reboot waiting 10 seconds for dpkg lock" | wall -n
    sleep 10
  done
  echo "pid $PID. dpkg locked for 5 minutes, automatic reboot failed" | pee cat "wall -n"
fi