We could add the function do_mygetpid to the misc.c file.

PUBLIC int do_mygetpid()
{
  /**
   * Global mp will point to the caller's process table entry.
   * Lookup information in the process table.
   * Insert this information in the reply message (also 
   * in the process table entry)
   */



  return OK;
}

This needs explanation, but for the moment think of this as do_mygetpid is just building a reply message that will be sent back to the user process.