ListPartitions.c

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#include <Uefi.h>
#include <Library/UefiLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/OcMemoryLib.h>
#include <Library/OcFileLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiApplicationEntryPoint.h>
#include <Protocol/BlockIo.h>
 
EFI_STATUS
EFIAPI
UefiMain (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS                 Status;
  UINTN                      Index;
  UINTN                      HandleCount;
  EFI_HANDLE                 *Handles;
  EFI_BLOCK_IO_PROTOCOL      *BlkIo;
  CONST EFI_PARTITION_ENTRY  *PartitionEntry;
 
  //
  // Find HardDrive
  //
  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiBlockIoProtocolGuid,
                  NULL,
                  &HandleCount,
                  &Handles
                  );
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_WARN, "Failed to find any partitions - %r\n", Status));
    return Status;
  }
 
  for (Index = 0; Index < HandleCount; ++Index) {
    Status = gBS->HandleProtocol (
                    Handles[Index],
                    &gEfiBlockIoProtocolGuid,
                    (VOID **)&BlkIo
                    );
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_WARN, "Partition #%u is unavailable - %r\n", (UINT32)(Index + 1), Status));
      continue;
    }
 
    if (!BlkIo->Media->LogicalPartition) {
      DEBUG ((DEBUG_WARN, "Partition #%u is not a logical partition\n", (UINT32)(Index + 1)));
      continue;
    }
 
    PartitionEntry = OcGetGptPartitionEntry (Handles[Index]);
    if (PartitionEntry == NULL) {
      DEBUG ((DEBUG_WARN, "Partition #%u GPT entry is not accessible\n", (UINT32)(Index + 1)));
      continue;
    }
 
    if (IsZeroGuid (&PartitionEntry->UniquePartitionGUID)) {
      DEBUG ((DEBUG_WARN, "Partition #%u GPT entry has all-zero GUID\n", (UINT32)(Index + 1)));
      continue;
    }
 
    DEBUG ((DEBUG_WARN, "Partition #%u details:\n", (UINT32)(Index + 1)));
    DEBUG ((DEBUG_WARN, "  PartitionName      : %-36s\n", PartitionEntry->PartitionName));
    DEBUG ((DEBUG_WARN, "  PartitionTypeGUID  : %g\n", &PartitionEntry->PartitionTypeGUID));
    DEBUG ((DEBUG_WARN, "  UniquePartitionGUID: %g\n", &PartitionEntry->UniquePartitionGUID));
  }
 
  FreePool (Handles);
 
  return EFI_SUCCESS;
}