.    @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted.    @retval EFI_WRITE_PROTECTED   An attempt was made to create a file, or open a file for write                                  when the media is write-protected.    @retval EFI_ACCESS_DENIED     The service denied access to the file.    @retval EFI_OUT_OF_RESOURCES  Not enough resources were available to open the file.    @retval EFI_VOLUME_FULL       The volume is full.  **/  typedef  EFI_STATUS  (EFIAPI *EFI_SHELL_