mirror of
https://github.com/k8snetworkplumbingwg/multus-cni.git
synced 2025-08-30 23:56:05 +00:00
334fdce751
this provides a simple way to handle incoming os signas using context Signed-off-by: adrianc <adrianc@nvidia.com>
46 lines
1.3 KiB
Go
46 lines
1.3 KiB
Go
// Copyright (c) 2024 Multus Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Package signals provides handling for os signals.
|
|
package signals
|
|
|
|
import (
|
|
"context"
|
|
"os"
|
|
"os/signal"
|
|
"syscall"
|
|
)
|
|
|
|
var onlyOneSignalHandler = make(chan struct{})
|
|
|
|
// SetupSignalHandler registers for SIGTERM and SIGINT. A context is returned
|
|
// which is canceled on one of these signals. If a second signal is caught, the program
|
|
// is terminated with exit code 1.
|
|
func SetupSignalHandler() context.Context {
|
|
close(onlyOneSignalHandler) // panics when called twice
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
|
|
c := make(chan os.Signal, 2)
|
|
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
|
|
go func() {
|
|
<-c
|
|
cancel()
|
|
<-c
|
|
os.Exit(1) // second signal. Exit directly.
|
|
}()
|
|
|
|
return ctx
|
|
}
|