Test go code with new processes and pipes

test-go-exec-main.go

package main

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

func main() {
	read, write, _ := os.Pipe()

	ls := exec.Command("ls", "-l")
	ls.Stdout = write
	ls.Stderr = os.Stderr
	ls.Dir = "/Users/croese"

	grep := exec.Command("grep", `\sP`)
	grep.Stdin = read

	r, w, err := os.Pipe()
	if err != nil {
		log.Fatalln(err)
	}

	grep.Stdout = w
	grep.Stderr = os.Stderr

	wc := exec.Command("wc", "-l")
	wc.Stdin = r
	wc.Stdout = os.Stdout
	wc.Stderr = os.Stderr

	err = ls.Start()
	if err != nil {
		log.Fatalln(err)
	}
	err = grep.Start()
	if err != nil {
		log.Fatalln(err)
	}
	err = wc.Start()
	if err != nil {
		log.Fatalln(err)
	}
}