Golang : Convert an executable file into []byte example

This small utility program will read an executable file(or just any file) and convert the content into a []byte slice. For our learning purpose, we will write a simple Hello World program using C language and convert the executable file a.out into []byte slice.

Here you go!

HelloWorld.c

 #include <stdio.h>
  int main()
  {
 printf("Hello, World!");
 return 0;
  }

and after compiling with gcc, we will get small a.out executable file. The Golang program below will convert the executable file to []byte slice, which we will use for the next tutorial...which is about giving birth to another program during runtime.

 package main

  import (
 "fmt"
 "io/ioutil"
  )

  func main() {

 file, err := ioutil.ReadFile("a.out")

 if err != nil {
 panic(err)
 }

 // get the size of file
 size := len(file)

 // out the file content
 fmt.Print("[]byte{")
 for k, v := range file {
 fmt.Print(v)

 if k < size-1 {
 fmt.Print(",")
 }
 }
 fmt.Print("}")
  }