Hello,
Try also using the read and create flags. I had a problem like this and
passing those flags the file could be opened and written.
Best Regards
Leandro Becker
>>> Em Quinta, 27 de Março de 2014 às 13:50, na mensagem
<98d4070157384f6aa641a82900863...@amspr02mb229.eurprd02.prod.outlook.com>,
"miguelro...@ua.pt" <miguelro...@ua.pt> gravou:
Hello all,
I'm getting an error when trying to open a file for writing. I have no
problems when I open the same file with read permissions.
I'm using the following code:
EFI_FILE_IO_INTERFACE *
get_io_interface(EFI_HANDLE image)
{
EFI_STATUS status;
EFI_HANDLE loadedImHandle;
EFI_FILE_IO_INTERFACE * vol;
EFI_LOADED_IMAGE *li;
status = uefi_call_wrapper( BS->HandleProtocol, 3,
image, &LoadedImageProtocol, (void **) &li);
if( status != EFI_SUCCESS ) return NULL;
loadedImHandle = li->DeviceHandle;
status = uefi_call_wrapper( BS->HandleProtocol, 3,
loadedImHandle, &FileSystemProtocol,
(void **)&vol );
if(status != EFI_SUCCESS) return NULL;
return vol;
}
EFI_FILE_HANDLE
get_file_handle(EFI_HANDLE image, UINT64 mode)
{
EFI_STATUS status;
EFI_FILE_IO_INTERFACE * vol;
EFI_FILE_HANDLE root;
EFI_FILE_HANDLE fp;
vol = get_io_interface(image);
if( vol == NULL) return NULL;
status = uefi_call_wrapper( vol->OpenVolume, 2,
vol, &root);
if( status != EFI_SUCCESS ) return NULL;
status = uefi_call_wrapper( root->Open, 5,
root, &fp, ticket_file,
mode, 0 );
Print(L"Open=%d\n", status); // I get status = 2 (INVALID_PARAMETER)
if( status != EFI_SUCCESS ) return NULL;
return fp;
}
// pseudo-code
EFI_STATUS
efi_main(EFI_HANDLE image)
{
//....
get_file_handle (image, EFI_FILE_MODE_WRITE);
}
(#define EFI_FILE_MODE_WRITE 0x0000000000000002)
I'm using GNUEFI lib.
Am I missing something or Ovmf does not support file writing?
Regards,
Miguel Rocha
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