1 files changed, 42 insertions, 0 deletions
diff --git a/cgpt/cgpt_legacy.c b/cgpt/cgpt_legacy.c
new file mode 100644
index 00000000..7d1eeeac
--- /dev/null
+++ b/cgpt/cgpt_legacy.c
@@ -0,0 +1,42 @@
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cgpt.h"
+
+#include <string.h>
+
+#include "cgptlib_internal.h"
+#include "cgpt_params.h"
+
+int cgpt_legacy(CgptLegacyParams *params) {
+  struct drive drive;
+  GptHeader *h1, *h2;
+
+  if (params == NULL)
+    return CGPT_FAILED;
+
+  if (CGPT_OK != DriveOpen(params->drive_name, &drive, O_RDWR))
+    return CGPT_FAILED;
+
+  h1 = (GptHeader *)drive.gpt.primary_header;
+  h2 = (GptHeader *)drive.gpt.secondary_header;
+  if (params->efipart) {
+    memcpy(h1->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
+    memcpy(h2->signature, GPT_HEADER_SIGNATURE, GPT_HEADER_SIGNATURE_SIZE);
+    RepairEntries(&drive.gpt, MASK_SECONDARY);
+    drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
+                           GPT_MODIFIED_HEADER2);
+  } else {
+    memcpy(h1->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
+    memcpy(h2->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
+    memset(drive.gpt.primary_entries, 0, drive.gpt.sector_bytes);
+    drive.gpt.modified |= (GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1 |
+                           GPT_MODIFIED_HEADER2);
+  }
+
+  UpdateCrc(&drive.gpt);
+
+  // Write it all out
+  return DriveClose(&drive, 1);
+}