go-routine-sample

main.go

package main

import (
	"log"
	"time"
	"os"
	"os/exec"
	"syscall"
)

func main() {
	log.Print("started.")

	command()
//	go command()

//	i := 0
//	for ;; {
//		i++
////		log.Println(i)
//	}

	log.Print("all finished.")
}

func command() {
	cmd := exec.Command(os.Getenv("SHELL"), "-c", "./sleep.sh")
	cmd.Start();
	pgid := getPgid(cmd.Process)
	time.Sleep(10 * time.Second)
	killPg(pgid)
}

func getPgid(ps *os.Process) (int) {
	pgid, err := syscall.Getpgid(ps.Pid)

	if err != nil {
		panic("can not get pgid")
	}

	return pgid
}

func killPg(pgid int) {
	err := syscall.Kill(-pgid, 15)

	if err != nil {
		panic("can not kill pg")
	}
}

sleep.sh

#!/usr/bin/env bash

sleep 120