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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 "chromeos/version/version_loader.h"
- #include <stddef.h>
- #include <string>
- #include <utility>
- #include <vector>
- #include "base/files/file_path.h"
- #include "base/files/file_util.h"
- #include "base/location.h"
- #include "base/logging.h"
- #include "base/strings/string_number_conversions.h"
- #include "base/strings/string_split.h"
- #include "base/strings/string_util.h"
- #include "base/strings/stringprintf.h"
- #include "base/strings/utf_string_conversions.h"
- #include "base/system/sys_info.h"
- #include "base/time/time.h"
- #include "chromeos/strings/grit/chromeos_strings.h"
- namespace chromeos {
- namespace version_loader {
- namespace {
- // Beginning of line we look for that gives full version number.
- // Format: x.x.xx.x (Developer|Official build extra info) board info
- const char kFullVersionKey[] = "CHROMEOS_RELEASE_DESCRIPTION";
- // Same but for short version (x.x.xx.x).
- const char kVersionKey[] = "CHROMEOS_RELEASE_VERSION";
- // Same but for ARC version.
- const char kArcVersionKey[] = "CHROMEOS_ARC_VERSION";
- // Same but for ARC Android SDK Version
- const char kArcAndroidSdkVersionKey[] = "CHROMEOS_ARC_ANDROID_SDK_VERSION";
- // Beginning of line we look for that gives the firmware version.
- const char kFirmwarePrefix[] = "version";
- // File to look for firmware number in.
- const char kPathFirmware[] = "/var/log/bios_info.txt";
- } // namespace
- std::string GetVersion(VersionFormat format) {
- std::string version;
- std::string key = (format == VERSION_FULL ? kFullVersionKey : kVersionKey);
- if (!base::SysInfo::GetLsbReleaseValue(key, &version)) {
- LOG_IF(ERROR, base::SysInfo::IsRunningOnChromeOS())
- << "No LSB version key: " << key;
- version = "0.0.0.0";
- }
- if (format == VERSION_SHORT_WITH_DATE) {
- base::Time::Exploded ctime;
- base::SysInfo::GetLsbReleaseTime().UTCExplode(&ctime);
- version += base::StringPrintf("-%02u.%02u.%02u", ctime.year % 100,
- ctime.month, ctime.day_of_month);
- }
- return version;
- }
- std::string GetArcVersion() {
- std::string version;
- if (!base::SysInfo::GetLsbReleaseValue(kArcVersionKey, &version)) {
- LOG_IF(ERROR, base::SysInfo::IsRunningOnChromeOS())
- << "No LSB version key: " << kArcVersionKey;
- }
- return version;
- }
- absl::optional<std::string> GetArcAndroidSdkVersion() {
- std::string arc_sdk_version;
- if (!base::SysInfo::GetLsbReleaseValue(kArcAndroidSdkVersionKey,
- &arc_sdk_version)) {
- LOG_IF(ERROR, base::SysInfo::IsRunningOnChromeOS())
- << "No LSB version key: " << kArcAndroidSdkVersionKey;
- return absl::nullopt;
- }
- return arc_sdk_version;
- }
- std::string GetFirmware() {
- std::string firmware;
- std::string contents;
- const base::FilePath file_path(kPathFirmware);
- if (base::ReadFileToString(file_path, &contents)) {
- firmware = ParseFirmware(contents);
- }
- return firmware;
- }
- std::string 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
- base::StringPiece firmware_prefix(kFirmwarePrefix);
- for (const std::string& line : base::SplitString(
- contents, "\n", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
- if (base::StartsWith(line, firmware_prefix,
- base::CompareCase::INSENSITIVE_ASCII)) {
- std::string str = line.substr(firmware_prefix.size());
- size_t found = str.find_first_not_of("| ");
- if (found != std::string::npos)
- return str.substr(found);
- }
- }
- return std::string();
- }
- bool IsRollback(const std::string& current_version,
- const std::string& new_version) {
- VLOG(1) << "Current version: " << current_version;
- VLOG(1) << "New version: " << new_version;
- if (new_version == "0.0.0.0") {
- // No update available.
- return false;
- }
- std::vector<std::string> current_version_parts = base::SplitString(
- current_version, ".", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
- std::vector<std::string> new_version_parts = base::SplitString(
- new_version, ".", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
- for (size_t i = 0;
- i < current_version_parts.size() && i < new_version_parts.size(); ++i) {
- if (current_version_parts[i] == new_version_parts[i])
- continue;
- unsigned int current_part, new_part;
- if (!base::StringToUint(current_version_parts[i], ¤t_part) ||
- !base::StringToUint(new_version_parts[i], &new_part)) {
- // One of the parts is not a number (e.g. date in test builds), compare
- // strings.
- return current_version_parts[i] > new_version_parts[i];
- }
- return current_part > new_part;
- }
- // Return true if new version is prefix of current version, false otherwise.
- return new_version_parts.size() < current_version_parts.size();
- }
- } // namespace version_loader
- } // namespace chromeos
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