1 files changed, 35 insertions, 0 deletions
diff --git a/src/boot/efi/disk.c b/src/boot/efi/disk.c
new file mode 100644
index 0000000..89508f8
--- /dev/null
+++ b/src/boot/efi/disk.c
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <efi.h>
+#include <efilib.h>
+
+#include "util.h"
+
+EFI_STATUS disk_get_part_uuid(EFI_HANDLE *handle, CHAR16 uuid[static 37]) {
+        EFI_DEVICE_PATH *device_path;
+
+        /* export the device path this image is started from */
+        device_path = DevicePathFromHandle(handle);
+        if (device_path) {
+                _cleanup_freepool_ EFI_DEVICE_PATH *paths = NULL;
+                EFI_DEVICE_PATH *path;
+
+                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);
+                        return EFI_SUCCESS;
+                }
+        }
+
+        return EFI_NOT_FOUND;
+}