What's wrong with this Golang program?

Question

Isn't this Golang program supposed to output a directory listing to stdout? It compiles ok, but does nothing.

package main

import "exec"

func main() {
  argv := []string{"-la"}
  envv := []string{}
  exec.Run("ls", argv, envv, "", exec.DevNull, exec.PassThrough, exec.MergeWithStdout)
}

Answer 1

exec.Run replaces your program with the one it executes -- it never returns to your app. This means that when 'cd' completes, it will exit as normal, and the only effect should be of changing the directory; 'ls' will never run.

Answer 2

this works:

package main
import "exec"

func main() {
  cmd, err := exec.Run("/bin/ls", []string{"/bin/ls", "-la"}, []string{}, "", exec.DevNull, exec.PassThrough, exec.PassThrough)
  if (err != nil) {
    return
  }
  cmd.Close()
}