Execute arbitrary commands by golang

cmd.go

package main

// execute arbitrary shell command
// if chmod u+s ./cmd, you can cross the bounds of shell scripts

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

func main() {
	cmd := os.Args[1]
	args := os.Args[2:]

	cmdobj := exec.Command(cmd, args...)

	cmdobj.Stdout = os.Stdout
	cmdobj.Stderr = os.Stderr

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