Split SystemAccess into TimezoneSettings, StatisticsProvider, and SyslogsProvider.

chrome/browser/chromeos/system/statistics_provider.cc

+// Copyright (c) 2011 The Chromium 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 "chrome/browser/chromeos/system/statistics_provider.h"
+
+#include "base/memory/singleton.h"
+#include "base/task.h"
+#include "chrome/browser/chromeos/system/name_value_pairs_parser.h"
+
+namespace chromeos {
+namespace system {
+namespace {
+
+// The system command that returns the hardware class.
+const char kHardwareClassKey[] = "hardware_class";
+const char* kHardwareClassTool[] = { "crossystem", "hwid" };
+const char kUnknownHardwareClass[] = "unknown";
+
+// Command to get machine hardware info and key/value delimiters.
+// /tmp/machine-info is generated by platform/init/chromeos_startup.
+const char* kMachineHardwareInfoTool[] = { "cat", "/tmp/machine-info" };
+const char kMachineHardwareInfoEq[] = "=";
+const char kMachineHardwareInfoDelim[] = " \n";
+
+// Command to get machine OS info and key/value delimiters.
+const char* kMachineOSInfoTool[] = { "cat", "/etc/lsb-release" };
+const char kMachineOSInfoEq[] = "=";
+const char kMachineOSInfoDelim[] = "\n";
+
+// Command to get VPD info and key/value delimiters.
+const char* kVpdTool[] = { "cat", "/var/log/vpd_2.0.txt" };
+const char kVpdEq[] = "=";
+const char kVpdDelim[] = "\n";
+
+}  // namespace
+
+class StatisticsProviderImpl : public StatisticsProvider {
+ public:
+  // StatisticsProvider implementation:
+  virtual bool GetMachineStatistic(const std::string& name,
+                                   std::string* result);
+
+  static StatisticsProviderImpl* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<StatisticsProviderImpl>;
+
+  StatisticsProviderImpl();
+
+  // Updates the machine statistcs by examining the system.
+  void UpdateMachineStatistics();
+
+  NameValuePairsParser::NameValueMap machine_info_;
+
+  DISALLOW_COPY_AND_ASSIGN(StatisticsProviderImpl);
+};
+
+bool StatisticsProviderImpl::GetMachineStatistic(
+    const std::string& name, std::string* result) {
+  NameValuePairsParser::NameValueMap::iterator iter = machine_info_.find(name);
+  if (iter != machine_info_.end()) {
+    *result = iter->second;
+    return true;
+  }
+  return false;
+}
+
+StatisticsProviderImpl::StatisticsProviderImpl() {
+  // Get Statistics
+  UpdateMachineStatistics();
+}
+
+void StatisticsProviderImpl::UpdateMachineStatistics() {
+  NameValuePairsParser parser(&machine_info_);
+  if (!parser.GetSingleValueFromTool(arraysize(kHardwareClassTool),
+                                     kHardwareClassTool,
+                                     kHardwareClassKey)) {
+    // Use kUnknownHardwareClass if the hardware class command fails.
+    parser.AddNameValuePair(kHardwareClassKey, kUnknownHardwareClass);
+  }
+  parser.ParseNameValuePairsFromTool(arraysize(kMachineHardwareInfoTool),
+                                     kMachineHardwareInfoTool,
+                                     kMachineHardwareInfoEq,
+                                     kMachineHardwareInfoDelim);
+  parser.ParseNameValuePairsFromTool(arraysize(kMachineOSInfoTool),
+                                     kMachineOSInfoTool,
+                                     kMachineOSInfoEq,
+                                     kMachineOSInfoDelim);
+  parser.ParseNameValuePairsFromTool(
+      arraysize(kVpdTool), kVpdTool, kVpdEq, kVpdDelim);
+}
+
+StatisticsProviderImpl* StatisticsProviderImpl::GetInstance() {
+  return Singleton<StatisticsProviderImpl,
+                   DefaultSingletonTraits<StatisticsProviderImpl> >::get();
+}
+
+StatisticsProvider* StatisticsProvider::GetInstance() {
+  return StatisticsProviderImpl::GetInstance();
+}
+
+}  // namespace system
+}  // namespace chromeos
+
+// Allows InvokeLater without adding refcounting. StatisticsProviderImpl is a
+// Singleton and won't be deleted until it's last InvokeLater is run.
+DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::system::StatisticsProviderImpl);