goshell.go

package main

import (
	"io"
	"log"
	"os"
	"os/exec"
)

func Command(args ...string) {
	var ch = make(chan int)
	cmd := exec.Command(args[0], args[1:]...)
	connect(ch, cmd)
	if err := cmd.Start(); err != nil {
		log.Fatal(err)
	}
	_, _ = <-ch, <-ch
}

func connect(ch chan int, c *exec.Cmd) (err error) {
	if inp, err := c.StdinPipe(); err == nil {
		go loop(ch, os.Stdin, inp)
		if outp, err := c.StdoutPipe(); err == nil {
			go loop(ch, outp, os.Stdout)
			if errp, err := c.StderrPipe(); err == nil {
				go loop(ch, errp, os.Stderr)
				return nil
			}
		}
	}
	log.Fatal(err)
	return
}

func loop(ch chan int, inp io.Reader, outp io.Writer) {
	var buf = make([]byte, 1)
	for {
		_, err := inp.Read(buf)
		if err == nil {
			_, err = outp.Write(buf)
			if err == nil {
				continue
			}
		}
		ch <- 1
		return
	}
}

func main() {
	Command("bash")
	Command("ping", "-c3", "www.google.com")
}