iankelling.org Git - distro-setup/blob - filesystem/usr/local/bin/myupgrade

   1 #!/bin/bash
   2 # Copyright (C) 2019 Ian Kelling
   3 # SPDX-License-Identifier: AGPL-3.0-or-later
   4
   5 # usage: set DEBUG env var to anything to output to stdout
   6
   7 # Note: running this inside a cronjob, it wont mail any output if we end
   8 # up rebooting from this script.
   9
  10 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
  11
  12 source /usr/local/lib/err
  13 pre="${0##*/}:"
  14 PATH="/sbin:$PATH"
  15 m() { printf "$pre %s\n"  "$*"; "$@"; }
  16 e() { printf "$pre %s\n"  "$*"; }
  17 err() { echo "[$(date +'%Y-%m-%d %H:%M:%S%z')]: $pre: $*" >&2; }
  18
  19 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
  20
  21 hn=$(hostname -f)
  22 source /a/bin/bash_unpublished/source-state
  23
  24 d() {
  25   if [[ $DEBUG ]]; then
  26     pee cat "wall -n"
  27   else
  28     echo ok | sed 's/^/myupgrade /' | pee logger "wall -n"
  29   fi
  30 }
  31 myreboot() {
  32   for x in {30..1}; do
  33     echo "pid $$. unattended upgrade, rebooting in $((x*10)) seconds" | wall -n
  34     sleep 10
  35   done
  36   for x in {30..1}; do
  37     if ! fuser /var/lib/dpkg/lock &> /dev/null; then
  38       echo "pid $$. unattended upgrade, rebooting now" | d
  39       /a/bin/ds/keyscript-on
  40       /sbin/reboot
  41       exit 0
  42     fi
  43     echo "pid $$. unattended upgrade reboot waiting 10 seconds for dpkg lock" | wall -n
  44     sleep 10
  45   done
  46   echo "pid $$. dpkg locked for 5 minutes, automatic reboot failed" | d
  47 }
  48
  49
  50 # TODO: executed from cron, this doesnt sent an email when we reboot,
  51 # because rebooting from the script stops the ability to send email.
  52 # We should figure some workaround.
  53
  54 if ! out=$(/sbin/needrestart -p 2>&1); then
  55   printf "%s\n\n" "$out"
  56   if [[ $HOSTNAME != "$MAIL_HOST" ]]; then
  57     myreboot
  58   fi
  59 fi