2 Copyright 2017 The Kubernetes Authors.
4 Licensed under the Apache License, Version 2.0 (the "License");
5 you may not use this file except in compliance with the License.
6 You may obtain a copy of the License at
8 http://www.apache.org/licenses/LICENSE-2.0
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
24 var onlyOneSignalHandler = make(chan struct{})
26 // SetupSignalHandler registered for SIGTERM and SIGINT. A stop channel is returned
27 // which is closed on one of these signals. If a second signal is caught, the program
28 // is terminated with exit code 1.
29 func SetupSignalHandler() (stopCh <-chan struct{}) {
30 close(onlyOneSignalHandler) // panics when called twice
32 stop := make(chan struct{})
33 c := make(chan os.Signal, 2)
34 signal.Notify(c, shutdownSignals...)
39 os.Exit(1) // second signal. Exit directly.