#!/bin/bash

sd_booted() {
  [[ -d run/systemd/system && ! -L run/systemd/system ]]
}

add_journal_acls() {
  # ignore errors, since the filesystem might not support ACLs
  setfacl -Rnm g:wheel:rx,d:g:wheel:rx,g:adm:rx,d:g:adm:rx var/log/journal/ 2>/dev/null
  :
}

post_common() {
  systemd-sysusers
  journalctl --update-catalog
}

_216_2_changes() {
  echo ':: Coredumps are handled by systemd by default. Collection behavior can be'
  echo '   tuned in /etc/systemd/coredump.conf.'
}

_219_2_changes() {
  if mkdir -m2755 var/log/journal/remote 2>/dev/null; then
    chgrp systemd-journal-remote var/log/journal/remote
  fi
}

_219_4_changes() {
  if ! systemctl is-enabled -q remote-fs.target; then
    systemctl enable -q remote-fs.target
  fi
}

_230_1_changes() {
  echo ':: systemd-bootchart is no longer included with systemd'
}

_232_8_changes() {
  # paper over possible effects of CVE-2016-10156
  local stamps=(/var/lib/systemd/timers/*.timer)

  if [[ -f ${stamps[0]} ]]; then
    chmod 0644 "${stamps[@]}"
  fi
}

_233_75_3_changes() {
  # upstream installs services to /etc, which we remove
  # to keep bus activation we re-enable systemd-resolved
  if systemctl is-enabled -q systemd-resolved.service; then
    systemctl reenable systemd-resolved.service 2>/dev/null
  fi
}

post_install() {
  systemd-machine-id-setup

  post_common "$@"

  add_journal_acls

  # enable some services by default, but don't track them
  systemctl enable getty@tty1.service remote-fs.target

  echo ":: Append 'init=/usr/lib/systemd/systemd' to your kernel command line in your"
  echo "   bootloader to replace sysvinit with systemd, or install systemd-sysvcompat"

  # group 'systemd-journal-remote' is created by systemd-sysusers
  mkdir -m2755 var/log/journal/remote
  chgrp systemd-journal-remote var/log/journal/remote
}

post_upgrade() {
  post_common "$@"

  # don't reexec if the old version is 231-1 or 231-2.
  # https://github.com/systemd/systemd/commit/bd64d82c1c
  if [[ $1 != 231-[12] ]] && sd_booted; then
    systemctl --system daemon-reexec
  fi

  local v upgrades=(
    216-2
    219-2
    219-4
    230-1
    232-8
    233.75-3
  )

  for v in "${upgrades[@]}"; do
    if [[ $(vercmp "$v" "$2") -eq 1 ]]; then
      "_${v//[.-]/_}_changes"
    fi
  done
}

# vim:set ts=2 sw=2 et: