> ```go
> pidBytes := []byte(strconv.Itoa(os.Getpid()))
> err := ioutil.WriteFile("brog.pid", pidBytes, 0770)
> if err != nil {
>     return fmt.Errorf("writing pid to file, %v", err)
> }
> return nil
> ```

This makes shittons more sense. Implemented.
Should the file be deleted in (b *Brog) Close() ?