killthefreakingtree.go

func killProcessTree(parent int) {

	// get child processes
	out, _ := exec.Command("ps", "-o", "pid", "--no-heading", "--ppid", strconv.Itoa(parent)).Output()

	// if the child processes have any children, get them first
	for _, child := range strings.Split(string(out), "\n") {
		if pid, _ := strconv.Atoi(strings.TrimSpace(child)); pid > 0 {
			killProcessTree(pid)
		}
	}

	// kill the process
	if process, err := os.FindProcess(parent); err != nil {
		log.Fatal("Process not found ", err)
	} else {
		if err := process.Kill(); err != nil {
			log.Fatal("Can't kill ", parent, err)
		}
	}
}