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