| /* 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_t uuid[static 37]) { |
| EFI_STATUS err; |
| EFI_DEVICE_PATH *dp; |
| |
| /* export the device path this image is started from */ |
| |
| if (!handle) |
| return EFI_NOT_FOUND; |
| |
| err = BS->HandleProtocol(handle, MAKE_GUID_PTR(EFI_DEVICE_PATH_PROTOCOL), (void **) &dp); |
| if (err != EFI_SUCCESS) |
| return err; |
| |
| for (; !IsDevicePathEnd(dp); dp = NextDevicePathNode(dp)) { |
| if (DevicePathType(dp) != MEDIA_DEVICE_PATH) |
| continue; |
| if (DevicePathSubType(dp) != MEDIA_HARDDRIVE_DP) |
| continue; |
| |
| /* The HD device path may be misaligned. */ |
| HARDDRIVE_DEVICE_PATH hd; |
| memcpy(&hd, dp, MIN(sizeof(hd), (size_t) DevicePathNodeLength(dp))); |
| |
| if (hd.SignatureType != SIGNATURE_TYPE_GUID) |
| continue; |
| |
| _cleanup_free_ char16_t *tmp = xasprintf( |
| "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", |
| hd.Signature[3], |
| hd.Signature[2], |
| hd.Signature[1], |
| hd.Signature[0], |
| |
| hd.Signature[5], |
| hd.Signature[4], |
| hd.Signature[7], |
| hd.Signature[6], |
| |
| hd.Signature[8], |
| hd.Signature[9], |
| hd.Signature[10], |
| hd.Signature[11], |
| hd.Signature[12], |
| hd.Signature[13], |
| hd.Signature[14], |
| hd.Signature[15]); |
| strcpy16(uuid, tmp); |
| return EFI_SUCCESS; |
| } |
| |
| return EFI_NOT_FOUND; |
| } |
