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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Copyright (C) 2015 Kay Sievers <kay@vrfy.org>
*/
#include <efi.h>
#include <efilib.h>
#include "util.h"
EFI_STATUS disk_get_part_uuid(EFI_HANDLE *handle, CHAR16 uuid[37]) {
EFI_DEVICE_PATH *device_path;
EFI_STATUS r = EFI_NOT_FOUND;
/* export the device path this image is started from */
device_path = DevicePathFromHandle(handle);
if (device_path) {
EFI_DEVICE_PATH *path, *paths;
paths = UnpackDevicePath(device_path);
for (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);
r = EFI_SUCCESS;
break;
}
FreePool(paths);
}
return r;
}
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