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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <efi.h>
#include <efilib.h>
#include "disk.h"
#include "util.h"
EFI_STATUS disk_get_part_uuid(EFI_HANDLE *handle, CHAR16 uuid[static 37]) {
EFI_DEVICE_PATH *device_path;
_cleanup_freepool_ EFI_DEVICE_PATH *paths = NULL;
if (!handle)
return EFI_NOT_FOUND;
/* export the device path this image is started from */
device_path = DevicePathFromHandle(handle);
if (!device_path)
return EFI_NOT_FOUND;
paths = UnpackDevicePath(device_path);
for (EFI_DEVICE_PATH *path = paths; !IsDevicePathEnd(path); path = NextDevicePathNode(path)) {
HARDDRIVE_DEVICE_PATH *drive;
if (DevicePathType(path) != MEDIA_DEVICE_PATH)
continue;
if (DevicePathSubType(path) != MEDIA_HARDDRIVE_DP)
continue;
drive = (HARDDRIVE_DEVICE_PATH *)path;
if (drive->SignatureType != SIGNATURE_TYPE_GUID)
continue;
GuidToString(uuid, (EFI_GUID *)&drive->Signature);
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
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