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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "disk.h"
#include "proto/device-path.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;
}
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