#!/bin/sh

# needrestart - Restart daemons after library updates.
#
# Authors:
#   Thomas Liske <thomas@fiasko-nw.net>
#
# Copyright Holder:
#   2013 - 2020 (C) Thomas Liske [http://fiasko-nw.net/~thomas/]
#
# License:
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#

RUNDIR=/run/needrestart

# dpkg had an error... exit (silently)
if [ -e "$RUNDIR/errored" ]; then
    [ -e "$RUNDIR/unpacked" ] && echo "needrestart is being skipped since dpkg has failed"
    rm -f "$RUNDIR/errored"
    exit 0
fi

if [ -e "$RUNDIR/unpacked" ]; then
    # check if system is shutting down, see also Debian Bug#914753
    if [ -d '/run/systemd/system' ]; then
        sd=$(dbus-send --system --dest=org.freedesktop.login1 \
                       --print-reply \
                       /org/freedesktop/login1 \
                       org.freedesktop.DBus.Properties.Get \
                       string:org.freedesktop.login1.Manager \
                       string:PreparingForShutdown 2> /dev/null)

        if [ "$sd" != "${sd% true}" ]; then
            echo "skipping needrestart since system is preparing for shutdown"
            exit 0
        fi
    fi

    if [ -n "$NEEDRESTART_SUSPEND" ]; then
        echo "packages have been installed but needrestart is suspended"
        exit 0
    fi

    rm -f "$RUNDIR/unpacked"
    exec /usr/sbin/needrestart "$@"
fi