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#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
INTN EFIAPI ShellAppMain(IN UINTN Argc, IN CHAR16 **Argv)
{
EFI_GUID VendorGuid;
UINTN VariableNameSize = sizeof (CHAR16);
CHAR16* VariableName = AllocateZeroPool(sizeof(CHAR16));
if (VariableName == NULL) {
Print(L"Error on AllocateZeroPool call\n");
return EFI_OUT_OF_RESOURCES;
}
while (TRUE)
{
UINTN VariableNameSizeOld = VariableNameSize;
EFI_STATUS Status = gRT->GetNextVariableName(&VariableNameSize, VariableName, &VendorGuid);
if (Status == EFI_SUCCESS) {
Print(L"%g: %s\n", VendorGuid, VariableName);
} else if (Status == EFI_BUFFER_TOO_SMALL) {
VariableName = ReallocatePool(VariableNameSizeOld, VariableNameSize, VariableName);
if (VariableName == NULL) {
Print(L"Error on ReallocatePool call\n");
return EFI_OUT_OF_RESOURCES;
}
Status = gRT->GetNextVariableName(&VariableNameSize, VariableName, &VendorGuid);
if (Status == EFI_SUCCESS) {
Print(L"%g: %s\n", VendorGuid, VariableName);
} else {
Print(L"Error on 'gRT->GetNextVariableName' call: %s\n", Status);
return Status;
}
} else if (Status == EFI_NOT_FOUND) {
FreePool(VariableName);
return EFI_SUCCESS;
} else {
Print(L"Error on 'gRT->GetNextVariableName' call: %s\n", Status);
return Status;
}
}
return EFI_SUCCESS;
}
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