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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_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, &DevicePathProtocol, (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;
GuidToString(uuid, (EFI_GUID *) &hd.Signature);
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
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