#!/bin/sh

sd_booted() {
  [ -e sys/fs/cgroup/systemd ]
}

post_install() {
  # enable getty@tty1 by default, but don't track the file
  systemctl enable getty@.service

  echo ":: Append 'init=/bin/systemd' to your kernel command line in your"
  echo "   bootloader to replace sysvinit with systemd"
}

post_upgrade() {
  if sd_booted; then
    # we moved the binary in 44-2 to /usr, so a reexec leads to a
    # coredump. refuse this reexec and warn the user that they should
    # reboot instead.
    if [ "$(vercmp 44-2 "$2")" -eq 1 ]; then
      echo "warning: refusing to reexec systemd. the system should be rebooted."
    else
      systemctl daemon-reload
      systemctl daemon-reexec
    fi
  fi

  # getty@tty1.service is no longer enabled by default, but we don't want to break
  # existing setups.
  if [ "$(vercmp 183 "$2")" -eq 1 ]; then
    # systemctl seems to be whiny on sysvinit. this will succeed unless something
    # horrific happens, so just mask the error.
    systemctl -q enable getty@.service || true
  fi
}

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