Ignore the AlternateLBA field in the GPT headers.

src/platform/vboot_reference/utility/cgpt/cgpt_show.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.
  *
  * Show GPT details.
  */
 #include <getopt.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include "cgpt.h"
@@ skipping 90 matching lines @@
     char buf[BUFFER_SIZE(sizeof(header->signature))];
     RawDump((uint8_t *)header->signature, sizeof(header->signature), buf, 1);
     printf("%s", buf);
   }
   printf("\n");
 
   printf("%sRev: 0x%08x\n", indent, header->revision);
   printf("%sSize: %d\n", indent, header->size);
   printf("%sHeader CRC: 0x%08x\n", indent, header->header_crc32);
   printf("%sMy LBA: %lld\n", indent, (long long)header->my_lba);
-  printf("%sAlter LBA: %lld\n", indent, (long long)header->alternate_lba);
   printf("%sFirst LBA: %lld\n", indent, (long long)header->first_usable_lba);
   printf("%sLast LBA: %lld\n", indent, (long long)header->last_usable_lba);
 
   {  /* For disk guid */
     char buf[GUID_STRLEN];
     GuidToStr(&header->disk_uuid, buf);
     printf("%sDisk UUID: %s\n", indent, buf);
   }
 
   printf("%sEntries LBA: %lld\n", indent, (long long)header->entries_lba);
@@ skipping 85 matching lines @@
                      "hnv",
                      ARRAY_COUNT(show_options),
                      show_options,
                      show_options_details))
     return CGPT_FAILED;
   if (help != NOT_INITED) {
     ShowHelp();
     return CGPT_FAILED;
   }
 
-  OpenDriveInLastArgument(argc, argv, &drive);
   if (CGPT_OK != OpenDriveInLastArgument(argc, argv, &drive))
     return CGPT_FAILED;
 
   printf(TITLE_FMT, "start", "size", "index", "contents");
   printf(GPT_FMT, 0, GPT_PMBR_SECTOR, "", "PMBR");
 
   if (drive.gpt.valid_headers & MASK_PRIMARY) {
     printf(GPT_FMT, (int)GPT_PMBR_SECTOR,
            (int)GPT_HEADER_SECTOR, "", "Pri GPT header");
     if (verbose) {
@@ skipping 55 matching lines @@
       header = (GptHeader*)drive.gpt.secondary_header;
       HeaderDetails(header, indent);
     }
   }
 
   CheckValid(&drive);
   DriveClose(&drive);
 
   return CGPT_OK;
 }