AU: Start checkpointing update progress.

prefs.cc

 // 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 "update_engine/prefs.h"
 
 #include <base/file_util.h>
 #include <base/logging.h>
 #include <base/string_number_conversions.h>
 #include <base/string_util.h>
 
 #include "update_engine/utils.h"
 
 using std::string;
 
 namespace chromeos_update_engine {
 
 const char kPrefsDeltaUpdateFailures[] = "delta-update-failures";
 const char kPrefsLastActivePingDay[] = "last-active-ping-day";
 const char kPrefsLastRollCallPingDay[] = "last-roll-call-ping-day";
+const char kPrefsManifestMetadataSize[] = "manifest-metadata-size";
+const char kPrefsUpdateCheckResponseHash[] = "update-check-response-hash";
+const char kPrefsUpdateStateNextDataOffset[] = "update-state-next-data-offset";
+const char kPrefsUpdateStateNextOperation[] = "update-state-next-operation";
+const char kPrefsUpdateStateSignedSHA256Context[] =
+    "update-state-signed-sha-256-context";
 
 bool Prefs::Init(const FilePath& prefs_dir) {
   prefs_dir_ = prefs_dir;
   return true;
 }
 
 bool Prefs::GetString(const string& key, string* value) {
-  LOG(INFO) << "Getting key \"" << key << "\"";
   FilePath filename;
   TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));
   TEST_AND_RETURN_FALSE(file_util::ReadFileToString(filename, value));
-  LOG(INFO) << "Key \"" << key << "\" value \"" << *value << "\"";
   return true;
 }
 
 bool Prefs::SetString(const std::string& key, const std::string& value) {
-  LOG(INFO) << "Setting key \"" << key << "\" value \"" << value << "\"";
   FilePath filename;
   TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));
   TEST_AND_RETURN_FALSE(file_util::CreateDirectory(filename.DirName()));
   TEST_AND_RETURN_FALSE(
       file_util::WriteFile(filename, value.data(), value.size()) ==
       static_cast<int>(value.size()));
   return true;
 }
 
 bool Prefs::GetInt64(const string& key, int64_t* value) {
@@ skipping 14 matching lines @@
   for (size_t i = 0; i < key.size(); ++i) {
     char c = key.at(i);
     TEST_AND_RETURN_FALSE(IsAsciiAlpha(c) || IsAsciiDigit(c) ||
                           c == '_' || c == '-');
   }
   *filename = prefs_dir_.Append(key);
   return true;
 }
 
 }  // namespace chromeos_update_engine