Golang: Execute with a Timeout

exec_with_timeout.go

package main

import (
	"bytes"
	"fmt"
	"os/exec"
	"time"
)

type killCmdForce func(exec.Cmd)

func main() {
	cmd := exec.Command("nmap", "127.0.0.1", "-oX", "-", "-p", "0-65535")
	var stdout, stderr bytes.Buffer
	cmd.Stdout = &stdout
	cmd.Stderr = &stderr

	result_chan := make(chan error)
	defer close(result_chan)

	go func() {
		result_chan <- cmd.Run()
	}()

	select {
	case err := <-result_chan:
		if err != nil {
			fmt.Println(err)
		} else {
			xmlNmap := string(stdout.Bytes())
			fmt.Print(xmlNmap)
		}
	case <-time.After(10 * time.Second):
		cmd.Process.Kill()
	}
}