Add 'prioritize' command to cgpt tool.

cgpt/cmd_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.
 
 #include "cgpt.h"
 
 #define __STDC_FORMAT_MACROS
 #include <getopt.h>
 #include <inttypes.h>
 #include <stdio.h>
@@ skipping 115 matching lines @@
            (int)(entry->ending_lba - entry->starting_lba + 1),
            index+1, contents);
     if (CGPT_OK == ResolveType(&entry->type, type)) {
       printf(PARTITION_MORE, "Type: ", type);
     } else {
       GuidToStr(&entry->type, type, GUID_STRLEN);
       printf(PARTITION_MORE, "Type: ", type);
     }
     GuidToStr(&entry->unique, unique, GUID_STRLEN);
     printf(PARTITION_MORE, "UUID: ", unique);
-    if (!memcmp(&guid_chromeos_kernel, &entry->type, sizeof(Guid))) {
+    if (GuidEqual(&guid_chromeos_kernel, &entry->type)) {
       int tries = (entry->attrs.fields.gpt_att &
                    CGPT_ATTRIBUTE_TRIES_MASK) >>
           CGPT_ATTRIBUTE_TRIES_OFFSET;
       int successful = (entry->attrs.fields.gpt_att &
                         CGPT_ATTRIBUTE_SUCCESSFUL_MASK) >>
           CGPT_ATTRIBUTE_SUCCESSFUL_OFFSET;
       int priority = (entry->attrs.fields.gpt_att &
                       CGPT_ATTRIBUTE_PRIORITY_MASK) >>
           CGPT_ATTRIBUTE_PRIORITY_OFFSET;
       require(snprintf(contents, sizeof(contents),
@@ skipping 22 matching lines @@
 }
 
 
 void EntriesDetails(GptData *gpt, const int secondary, int raw) {
   uint32_t i;
 
   for (i = 0; i < GetNumberOfEntries(gpt); ++i) {
     GptEntry *entry;
     entry = GetEntry(gpt, secondary, i);
 
-    if (!memcmp(&guid_unused, &entry->type, sizeof(Guid))) continue;
+    if (IsZero(&entry->type))
+      continue;
 
     EntryDetails(entry, i, raw);
   }
 }
 
 int cmd_show(int argc, char *argv[]) {
   struct drive drive;
   int numeric = 0;
   int verbose = 0;
   int quick = 0;
@@ skipping 221 matching lines @@
         HeaderDetails(header, indent, numeric);
       }
     }
   }
 
   (void) CheckValid(&drive);
   (void) DriveClose(&drive, 0);
 
   return CGPT_OK;
 }