support 'cgpt repair'

src/platform/vboot_reference/utility/cgpt/cgpt_repair.c

+/* Copyright (c) 2010 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.
+ *
+ * Repair headers and tables.
+ *
+ * If primary header or table is invalid, it copies from secondary (vice versa).
+ */
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "cgpt.h"
+#include "cgptlib_internal.h"
+#include "utility.h"
+
+/* Integers to store parsed argument. */
+static int help;
+
+/* The structure for getopt_long(). When you add/delete any line, please refine
+ * attribute_comments[] and third parameter of getopt_long() too.  */
+static struct option repair_options[] = {
+  {.name = "help", .has_arg = no_argument, .flag = 0, .val = 'h'},
+};
+
+/* Extra information than struct option, please update this structure if you
+ * add/remove any line in attribute_options[]. */
+static struct option_details repair_options_details[] = {
+  /* help */
+  { .comment = "print this help",
+    .validator = AssignTrue,
+    .valid_range = 0,
+    .parsed = &help},
+};
+
+void RepairHelp() {
+  printf("\nUsage: %s repair [OPTIONS] device_name\n\n", progname);
+  ShowOptions(repair_options, repair_options_details,
+              ARRAY_COUNT(repair_options));
+  printf("\n");
+}
+
+/* Parses all options (and validates them), then opens the drive and sets
+ * corresponding bits in GPT entry. */
+int CgptRepair(int argc, char *argv[]) {
+  struct drive drive;
+
+  /* I know this is NOT the perfect place to put code to make options[] and
+   * details[] are synced. But this is the best place we have right now since C
+   * preprocessor doesn't know sizeof() for #if directive. */
+  assert(ARRAY_COUNT(repair_options) ==
+         ARRAY_COUNT(repair_options_details));
+
+  help = NOT_INITED;
+
+  if (CGPT_OK != HandleOptions(argc, argv,
+                     "hr",
+                     ARRAY_COUNT(repair_options),
+                     repair_options,
+                     repair_options_details))
+    return CGPT_FAILED;
+  if (help != NOT_INITED) {
+    RepairHelp();
+    return CGPT_FAILED;
+  }
+
+  if (CGPT_OK != OpenDriveInLastArgument(argc, argv, &drive))
+    return CGPT_FAILED;
+
+  DriveClose(&drive);
+
+  return CGPT_OK;
+}