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// 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"
#include "chrome/browser/chromeos/system/runtime_environment.h"
namespace chromeos {
namespace system {
namespace {
// The tools used here should be specified as absolute paths. The
// existence of the tools is checked in GetSingleValueFromTool().
// The system command that returns the hardware class.
const char kHardwareClassKey[] = "hardware_class";
const char* kHardwareClassTool[] = { "/usr/bin/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[] = { "/bin/cat", "/tmp/machine-info" };
const char kMachineHardwareInfoEq[] = "=";
const char kMachineHardwareInfoDelim[] = " \n";
// Command to get machine OS info and key/value delimiters.
const char* kMachineOSInfoTool[] = { "/bin/cat", "/etc/lsb-release" };
const char kMachineOSInfoEq[] = "=";
const char kMachineOSInfoDelim[] = "\n";
// Command to get VPD info and key/value delimiters.
const char* kVpdTool[] = { "/bin/cat", "/var/log/vpd_2.0.txt" };
const char kVpdEq[] = "=";
const char kVpdDelim[] = "\n";
} // namespace
// The StatisticsProvider implementation used in production.
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();
}
// The stub StatisticsProvider implementation used on Linux desktop.
class StatisticsProviderStubImpl : public StatisticsProvider {
public:
// StatisticsProvider implementation:
virtual bool GetMachineStatistic(const std::string& name,
std::string* result) {
*result = "stub statistic for " + name;
return true;
}
static StatisticsProviderStubImpl* GetInstance() {
return Singleton<StatisticsProviderStubImpl,
DefaultSingletonTraits<StatisticsProviderStubImpl> >::get();
}
private:
friend struct DefaultSingletonTraits<StatisticsProviderStubImpl>;
StatisticsProviderStubImpl() {
}
DISALLOW_COPY_AND_ASSIGN(StatisticsProviderStubImpl);
};
StatisticsProvider* StatisticsProvider::GetInstance() {
if (system::runtime_environment::IsRunningOnChromeOS()) {
return StatisticsProviderImpl::GetInstance();
} else {
return StatisticsProviderStubImpl::GetInstance();
}
}
} // namespace system
} // namespace chromeos
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