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// Copyright (c) 2012 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 "base/sys_info.h"
#include <stddef.h>
#include <stdint.h>
#include "base/environment.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/lazy_instance.h"
#include "base/macros.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/string_tokenizer.h"
#include "base/strings/string_util.h"
#include "base/threading/thread_restrictions.h"
namespace base {
namespace {
const char* const kLinuxStandardBaseVersionKeys[] = {
"CHROMEOS_RELEASE_VERSION",
"GOOGLE_RELEASE",
"DISTRIB_RELEASE",
};
const char kChromeOsReleaseNameKey[] = "CHROMEOS_RELEASE_NAME";
const char* const kChromeOsReleaseNames[] = {
"Chrome OS",
"Chromium OS",
};
const char kLinuxStandardBaseReleaseFile[] = "/etc/lsb-release";
const char kLsbReleaseKey[] = "LSB_RELEASE";
const char kLsbReleaseTimeKey[] = "LSB_RELEASE_TIME"; // Seconds since epoch
const char kLsbReleaseSourceKey[] = "lsb-release";
const char kLsbReleaseSourceEnv[] = "env";
const char kLsbReleaseSourceFile[] = "file";
class ChromeOSVersionInfo {
public:
ChromeOSVersionInfo() {
Parse();
}
void Parse() {
lsb_release_map_.clear();
major_version_ = 0;
minor_version_ = 0;
bugfix_version_ = 0;
is_running_on_chromeos_ = false;
std::string lsb_release, lsb_release_time_str;
scoped_ptr<Environment> env(Environment::Create());
bool parsed_from_env =
env->GetVar(kLsbReleaseKey, &lsb_release) &&
env->GetVar(kLsbReleaseTimeKey, &lsb_release_time_str);
if (parsed_from_env) {
double us = 0;
if (StringToDouble(lsb_release_time_str, &us))
lsb_release_time_ = Time::FromDoubleT(us);
} else {
// If the LSB_RELEASE and LSB_RELEASE_TIME environment variables are not
// set, fall back to a blocking read of the lsb_release file. This should
// only happen in non Chrome OS environments.
ThreadRestrictions::ScopedAllowIO allow_io;
FilePath path(kLinuxStandardBaseReleaseFile);
ReadFileToString(path, &lsb_release);
File::Info fileinfo;
if (GetFileInfo(path, &fileinfo))
lsb_release_time_ = fileinfo.creation_time;
}
ParseLsbRelease(lsb_release);
// For debugging:
lsb_release_map_[kLsbReleaseSourceKey] =
parsed_from_env ? kLsbReleaseSourceEnv : kLsbReleaseSourceFile;
}
bool GetLsbReleaseValue(const std::string& key, std::string* value) {
SysInfo::LsbReleaseMap::const_iterator iter = lsb_release_map_.find(key);
if (iter == lsb_release_map_.end())
return false;
*value = iter->second;
return true;
}
void GetVersionNumbers(int32_t* major_version,
int32_t* minor_version,
int32_t* bugfix_version) {
*major_version = major_version_;
*minor_version = minor_version_;
*bugfix_version = bugfix_version_;
}
const Time& lsb_release_time() const { return lsb_release_time_; }
const SysInfo::LsbReleaseMap& lsb_release_map() const {
return lsb_release_map_;
}
bool is_running_on_chromeos() const { return is_running_on_chromeos_; }
private:
void ParseLsbRelease(const std::string& lsb_release) {
// Parse and cache lsb_release key pairs. There should only be a handful
// of entries so the overhead for this will be small, and it can be
// useful for debugging.
base::StringPairs pairs;
SplitStringIntoKeyValuePairs(lsb_release, '=', '\n', &pairs);
for (size_t i = 0; i < pairs.size(); ++i) {
std::string key, value;
TrimWhitespaceASCII(pairs[i].first, TRIM_ALL, &key);
TrimWhitespaceASCII(pairs[i].second, TRIM_ALL, &value);
if (key.empty())
continue;
lsb_release_map_[key] = value;
}
// Parse the version from the first matching recognized version key.
std::string version;
for (size_t i = 0; i < arraysize(kLinuxStandardBaseVersionKeys); ++i) {
std::string key = kLinuxStandardBaseVersionKeys[i];
if (GetLsbReleaseValue(key, &version) && !version.empty())
break;
}
StringTokenizer tokenizer(version, ".");
if (tokenizer.GetNext()) {
StringToInt(StringPiece(tokenizer.token_begin(), tokenizer.token_end()),
&major_version_);
}
if (tokenizer.GetNext()) {
StringToInt(StringPiece(tokenizer.token_begin(), tokenizer.token_end()),
&minor_version_);
}
if (tokenizer.GetNext()) {
StringToInt(StringPiece(tokenizer.token_begin(), tokenizer.token_end()),
&bugfix_version_);
}
// Check release name for Chrome OS.
std::string release_name;
if (GetLsbReleaseValue(kChromeOsReleaseNameKey, &release_name)) {
for (size_t i = 0; i < arraysize(kChromeOsReleaseNames); ++i) {
if (release_name == kChromeOsReleaseNames[i]) {
is_running_on_chromeos_ = true;
break;
}
}
}
}
Time lsb_release_time_;
SysInfo::LsbReleaseMap lsb_release_map_;
int32_t major_version_;
int32_t minor_version_;
int32_t bugfix_version_;
bool is_running_on_chromeos_;
};
static LazyInstance<ChromeOSVersionInfo>
g_chrome_os_version_info = LAZY_INSTANCE_INITIALIZER;
ChromeOSVersionInfo& GetChromeOSVersionInfo() {
return g_chrome_os_version_info.Get();
}
} // namespace
// static
void SysInfo::OperatingSystemVersionNumbers(int32_t* major_version,
int32_t* minor_version,
int32_t* bugfix_version) {
return GetChromeOSVersionInfo().GetVersionNumbers(
major_version, minor_version, bugfix_version);
}
// static
const SysInfo::LsbReleaseMap& SysInfo::GetLsbReleaseMap() {
return GetChromeOSVersionInfo().lsb_release_map();
}
// static
bool SysInfo::GetLsbReleaseValue(const std::string& key, std::string* value) {
return GetChromeOSVersionInfo().GetLsbReleaseValue(key, value);
}
// static
std::string SysInfo::GetLsbReleaseBoard() {
const char kMachineInfoBoard[] = "CHROMEOS_RELEASE_BOARD";
std::string board;
if (!GetLsbReleaseValue(kMachineInfoBoard, &board))
board = "unknown";
return board;
}
// static
Time SysInfo::GetLsbReleaseTime() {
return GetChromeOSVersionInfo().lsb_release_time();
}
// static
bool SysInfo::IsRunningOnChromeOS() {
return GetChromeOSVersionInfo().is_running_on_chromeos();
}
// static
void SysInfo::SetChromeOSVersionInfoForTest(const std::string& lsb_release,
const Time& lsb_release_time) {
scoped_ptr<Environment> env(Environment::Create());
env->SetVar(kLsbReleaseKey, lsb_release);
env->SetVar(kLsbReleaseTimeKey,
DoubleToString(lsb_release_time.ToDoubleT()));
g_chrome_os_version_info.Get().Parse();
}
} // namespace base
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