null.go

package main

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

func main() {
	data := make([]byte, 1024*512)
	cmd := exec.Command("wc")
	stdin, err := cmd.StdinPipe()

	if err != nil {
		log.Fatal(err)
	}

	fmt.Println("Writing ot stdin...")

	stdin.Write(data)
	stdin.Close()

	fmt.Println("Wrote to stdin")

	code := cmd.Run()
	fmt.Println(code)
}