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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/version_loader.h"
#include <vector>
#include "base/bind.h"
#include "base/file_util.h"
#include "base/files/file_path.h"
#include "base/location.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/threading/thread.h"
#include "base/time/time.h"
#include "chrome/browser/browser_process.h"
#include "content/public/browser/browser_thread.h"
using content::BrowserThread;
namespace {
// Converts const string* to const string&.
void VersionLoaderCallbackHelper(
base::Callback<void(const std::string&)> callback,
const std::string* version) {
callback.Run(*version);
}
} // namespace
namespace chromeos {
// File to look for version number in.
static const char kPathVersion[] = "/etc/lsb-release";
// File to look for firmware number in.
static const char kPathFirmware[] = "/var/log/bios_info.txt";
VersionLoader::VersionLoader() : backend_(new Backend()) {}
VersionLoader::~VersionLoader() {}
// Beginning of line we look for that gives full version number.
// Format: x.x.xx.x (Developer|Official build extra info) board info
// static
const char VersionLoader::kFullVersionPrefix[] =
"CHROMEOS_RELEASE_DESCRIPTION=";
// Same but for short version (x.x.xx.x).
// static
const char VersionLoader::kVersionPrefix[] = "CHROMEOS_RELEASE_VERSION=";
// Beginning of line we look for that gives the firmware version.
const char VersionLoader::kFirmwarePrefix[] = "version";
CancelableTaskTracker::TaskId VersionLoader::GetVersion(
VersionFormat format,
const GetVersionCallback& callback,
CancelableTaskTracker* tracker) {
std::string* version = new std::string();
return tracker->PostTaskAndReply(
BrowserThread::GetBlockingPool(),
FROM_HERE,
base::Bind(&Backend::GetVersion, backend_.get(), format, version),
base::Bind(&VersionLoaderCallbackHelper, callback, base::Owned(version)));
}
CancelableTaskTracker::TaskId VersionLoader::GetFirmware(
const GetFirmwareCallback& callback,
CancelableTaskTracker* tracker) {
std::string* firmware = new std::string();
return tracker->PostTaskAndReply(
BrowserThread::GetBlockingPool(),
FROM_HERE,
base::Bind(&Backend::GetFirmware, backend_.get(), firmware),
base::Bind(&VersionLoaderCallbackHelper,
callback, base::Owned(firmware)));
}
// static
std::string VersionLoader::ParseVersion(const std::string& contents,
const std::string& prefix) {
// The file contains lines such as:
// XXX=YYY
// AAA=ZZZ
// Split the lines and look for the one that starts with prefix. The version
// file is small, which is why we don't try and be tricky.
std::vector<std::string> lines;
base::SplitString(contents, '\n', &lines);
for (size_t i = 0; i < lines.size(); ++i) {
if (StartsWithASCII(lines[i], prefix, false)) {
std::string version = lines[i].substr(std::string(prefix).size());
if (version.size() > 1 && version[0] == '"' &&
version[version.size() - 1] == '"') {
// Trim trailing and leading quotes.
version = version.substr(1, version.size() - 2);
}
return version;
}
}
return std::string();
}
// static
std::string VersionLoader::ParseFirmware(const std::string& contents) {
// The file contains lines such as:
// vendor | ...
// version | ...
// release_date | ...
// We don't make any assumption that the spaces between "version" and "|" is
// fixed. So we just match kFirmwarePrefix at the start of the line and find
// the first character that is not "|" or space
std::vector<std::string> lines;
base::SplitString(contents, '\n', &lines);
for (size_t i = 0; i < lines.size(); ++i) {
if (StartsWithASCII(lines[i], kFirmwarePrefix, false)) {
std::string str = lines[i].substr(std::string(kFirmwarePrefix).size());
size_t found = str.find_first_not_of("| ");
if (found != std::string::npos)
return str.substr(found);
}
}
return std::string();
}
void VersionLoader::Backend::GetVersion(VersionFormat format,
std::string* version) {
DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
std::string contents;
const base::FilePath file_path(kPathVersion);
if (base::ReadFileToString(file_path, &contents)) {
*version = ParseVersion(
contents,
(format == VERSION_FULL) ? kFullVersionPrefix : kVersionPrefix);
}
if (format == VERSION_SHORT_WITH_DATE) {
base::PlatformFileInfo fileinfo;
if (file_util::GetFileInfo(file_path, &fileinfo)) {
base::Time::Exploded ctime;
fileinfo.creation_time.UTCExplode(&ctime);
*version += base::StringPrintf("-%02u.%02u.%02u",
ctime.year % 100,
ctime.month,
ctime.day_of_month);
}
}
}
void VersionLoader::Backend::GetFirmware(std::string* firmware) {
DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
std::string contents;
const base::FilePath file_path(kPathFirmware);
if (base::ReadFileToString(file_path, &contents)) {
*firmware = ParseFirmware(contents);
}
}
} // namespace chromeos
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