55 lines
1.3 KiB
Go
55 lines
1.3 KiB
Go
//go:build linux
|
|
// +build linux
|
|
|
|
/*
|
|
Copyright 2019 The Kubernetes Authors All rights reserved.
|
|
|
|
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 proc
|
|
|
|
import (
|
|
"os"
|
|
"os/signal"
|
|
"syscall"
|
|
|
|
"k8s.io/klog/v2"
|
|
)
|
|
|
|
// StartReaper starts a goroutine to reap processes if called from a process
|
|
// that has pid 1.
|
|
func StartReaper() {
|
|
if os.Getpid() == 1 {
|
|
klog.V(4).Infof("Launching reaper")
|
|
go func() {
|
|
sigs := make(chan os.Signal, 1)
|
|
signal.Notify(sigs, syscall.SIGCHLD)
|
|
for {
|
|
// Wait for a child to terminate
|
|
sig := <-sigs
|
|
klog.V(4).Infof("Signal received: %v", sig)
|
|
for {
|
|
// Reap processes
|
|
cpid, _ := syscall.Wait4(-1, nil, syscall.WNOHANG, nil)
|
|
if cpid < 1 {
|
|
break
|
|
}
|
|
|
|
klog.V(4).Infof("Reaped process with pid %d", cpid)
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
}
|