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/
stop.go
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/
stop.go
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// Copyright 2016 The rkt 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.
//+build linux
package main
import (
"flag"
"fmt"
"io/ioutil"
"os"
"github.com/shirou/gopsutil/process"
)
var (
force bool
)
func init() {
flag.BoolVar(&force, "force", false, "Forced stopping")
}
func readIntFromFile(path string) (i int32, err error) {
b, err := ioutil.ReadFile(path)
if err != nil {
return
}
_, err = fmt.Sscanf(string(b), "%d", &i)
return
}
func main() {
flag.Parse()
pid, err := readIntFromFile("ppid")
if err != nil {
fmt.Fprintf(os.Stderr, "error reading pid: %v\n", err)
os.Exit(254)
}
process, err := process.NewProcess(pid)
if err != nil {
fmt.Fprintf(os.Stderr, "unable to create process %d instance: %v\n", pid, err)
os.Exit(254)
}
if force {
children, err := process.Children()
if err != nil {
fmt.Fprintf(os.Stderr, "cannot get child processes from %d: %v\n", pid, err)
os.Exit(254)
}
for _, child := range children {
if err := child.Kill(); err != nil {
fmt.Fprintf(os.Stderr, "unable to kill process %d: %v\n", child.Pid, err)
os.Exit(254)
}
}
if err := process.Kill(); err != nil {
fmt.Fprintf(os.Stderr, "unable to kill process %d: %v\n", pid, err)
os.Exit(254)
}
} else {
if process.Terminate() != nil {
fmt.Fprintf(os.Stderr, "unable to terminate process %d: %v\n", pid, err)
os.Exit(254)
}
}
}