maddy

 1//go:build windows || plan9
 2// +build windows plan9
 3
 4/*
 5Maddy Mail Server - Composable all-in-one email server.
 6Copyright © 2019-2020 Max Mazurov <fox.cpp@disroot.org>, Maddy Mail Server contributors
 7
 8This program is free software: you can redistribute it and/or modify
 9it under the terms of the GNU General Public License as published by
10the Free Software Foundation, either version 3 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program.  If not, see <https://www.gnu.org/licenses/>.
20*/
21
22package maddy
23
24import (
25	"os"
26	"os/signal"
27	"syscall"
28
29	"github.com/foxcpp/maddy/framework/log"
30)
31
32func handleSignals() os.Signal {
33	sig := make(chan os.Signal, 5)
34	signal.Notify(sig, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGINT)
35
36	s := <-sig
37	go func() {
38		s := handleSignals()
39		log.Printf("forced shutdown due to signal (%v)!", s)
40		os.Exit(1)
41	}()
42
43	log.Printf("signal received (%v), next signal will force immediate shutdown.", s)
44	return s
45}