Re: Accessing global variables from Shell

[Laszlo Ersek <lersek@redhat.com>]

On 07/03/17 09:18, Udit Kumar wrote:
> Dear Edk2, 
> 
> I am trying to create one global variables, and access that from shell. 
> If I am using gEfiGlobalVariableGuid to create variable then I could access it perfectly ok ,  If I use other Guid (even vendor guid) then I couldn't access from shell. 
> 
> Original code 
> STATIC CONST CHAR16           myVar[] = L"MacUniqueId";
> Status = gRT->SetVariable ((CHAR16 *)myVar,
>                     &gEfiCallerIdGuid,
>                     EFI_VARIABLE_NON_VOLATILE |
>                      EFI_VARIABLE_BOOTSERVICE_ACCESS |
>                      EFI_VARIABLE_RUNTIME_ACCESS, Size,
> 
> On shell 
> FS0:\> setvar MacUniqueId -guid C9DCF469-A7C4-11D5-87DA-00062945C3B9
> setvar: Unable to get - C9DCF469-A7C4-11D5-87DA-00062945C3B9 - MacUniqueId

This GUID (in the shell command) is not one that you generated afresh
with "uuidgen", namely it is found in
"EdkCompatibilityPkg/Foundation/Guid/StatusCodeCallerId/StatusCodeCallerId.h".

My take is that "gEfiCallerIdGuid" denotes a different GUID from
C9DCF469-... If you take the actual FILE_GUID of the module INF where
your example code is from, and use that GUID in the shell command too,
it should work.

Laszlo