Nearly complete rewrite of cgpt tool.

This fixes a number of bugs, adds a bunch of commands, and essentially makes
cgpt ready to use as a replacement for gpt. Still to do is to add commands
and options that will let it generated intentionally bad partitions, for use
in testing.

Review URL: http://codereview.chromium.org/2719008

1 files changed, 85 insertions, 0 deletions

diff --git a/cgpt/cmd_repair.c b/cgpt/cmd_repair.c
new file mode 100644
index 00000000..aafdc938
--- /dev/null
+++ b/cgpt/cmd_repair.c
@@ -0,0 +1,85 @@
+// 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.
+
+#include "cgpt.h"
+
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "cgptlib_internal.h"
+
+static void Usage(void)
+{
+  printf("\nUsage: %s repair [OPTIONS] DRIVE\n\n"
+         "Repair damaged GPT headers and tables.\n\n"
+         "Options:\n"
+         "  -v           Verbose\n"
+         "\n", progname);
+}
+
+int cmd_repair(int argc, char *argv[]) {
+  struct drive drive;
+  int verbose = 0;
+  
+  int c;
+  int errorcnt = 0;
+
+  opterr = 0;                     // quiet, you
+  while ((c=getopt(argc, argv, ":hv")) != -1)
+  {
+    switch (c)
+    {
+    case 'v':
+      verbose++;
+      break;
+
+    case 'h':
+      Usage();
+      return CGPT_OK;
+    case '?':
+      Error("unrecognized option: -%c\n", optopt);
+      errorcnt++;
+      break;
+    case ':':
+      Error("missing argument to -%c\n", optopt);
+      errorcnt++;
+      break;
+    default:
+      errorcnt++;
+      break;
+    }
+  }
+  if (errorcnt)
+  {
+    Usage();
+    return CGPT_FAILED;
+  }
+
+  if (optind >= argc) {
+    Error("missing drive argument\n");
+    return CGPT_FAILED;
+  }
+
+  if (CGPT_OK != DriveOpen(argv[optind], &drive))
+    return CGPT_FAILED;
+
+  int gpt_retval = GptSanityCheck(&drive.gpt);
+  if (verbose)
+    printf("GptSanityCheck() returned %d: %s\n",
+           gpt_retval, GptError(gpt_retval));
+
+  GptRepair(&drive.gpt);
+  if (drive.gpt.modified & GPT_MODIFIED_HEADER1)
+    printf("Primary Header is updated.\n");
+  if (drive.gpt.modified & GPT_MODIFIED_ENTRIES1)
+    printf("Primary Entries is updated.\n");
+  if (drive.gpt.modified & GPT_MODIFIED_ENTRIES2)
+    printf("Secondary Entries is updated.\n");
+  if (drive.gpt.modified & GPT_MODIFIED_HEADER2)
+    printf("Secondary Header is updated.\n");
+
+  return DriveClose(&drive, 1);
+}