chromeos/system/version_loader.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chromeos/system/version_loader.h"
   6
   7 #include <vector>
   8
   9 #include "base/files/file_path.h"
  10 #include "base/files/file_util.h"
  11 #include "base/location.h"
  12 #include "base/strings/string_split.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/stringprintf.h"
  15 #include "base/sys_info.h"
  16 #include "base/time/time.h"
  17
  18 namespace chromeos {
  19 namespace version_loader {
  20
  21 namespace {
  22
  23 // Beginning of line we look for that gives full version number.
  24 // Format: x.x.xx.x (Developer|Official build extra info) board info
  25 const char kFullVersionKey[] = "CHROMEOS_RELEASE_DESCRIPTION";
  26
  27 // Same but for short version (x.x.xx.x).
  28 const char kVersionKey[] = "CHROMEOS_RELEASE_VERSION";
  29
  30 // Beginning of line we look for that gives the firmware version.
  31 const char kFirmwarePrefix[] = "version";
  32
  33 // File to look for firmware number in.
  34 const char kPathFirmware[] = "/var/log/bios_info.txt";
  35
  36 }  // namespace
  37
  38 std::string GetVersion(VersionFormat format) {
  39   std::string version;
  40   std::string key = (format == VERSION_FULL ?
  41                      kFullVersionKey : kVersionKey);
  42   if (!base::SysInfo::GetLsbReleaseValue(key, &version)) {
  43     LOG_IF(ERROR, base::SysInfo::IsRunningOnChromeOS())
  44         << "No LSB version key: " << key;
  45     version = "0.0.0.0";
  46   }
  47   if (format == VERSION_SHORT_WITH_DATE) {
  48     base::Time::Exploded ctime;
  49     base::SysInfo::GetLsbReleaseTime().UTCExplode(&ctime);
  50     version += base::StringPrintf("-%02u.%02u.%02u",
  51                                   ctime.year % 100,
  52                                   ctime.month,
  53                                   ctime.day_of_month);
  54   }
  55
  56   return version;
  57 }
  58
  59 std::string GetFirmware() {
  60   std::string firmware;
  61   std::string contents;
  62   const base::FilePath file_path(kPathFirmware);
  63   if (base::ReadFileToString(file_path, &contents)) {
  64     firmware = ParseFirmware(contents);
  65   }
  66   return firmware;
  67 }
  68
  69 std::string ParseFirmware(const std::string& contents) {
  70   // The file contains lines such as:
  71   // vendor           | ...
  72   // version          | ...
  73   // release_date     | ...
  74   // We don't make any assumption that the spaces between "version" and "|" is
  75   //   fixed. So we just match kFirmwarePrefix at the start of the line and find
  76   //   the first character that is not "|" or space
  77
  78   std::vector<std::string> lines;
  79   base::SplitString(contents, '\n', &lines);
  80   for (size_t i = 0; i < lines.size(); ++i) {
  81     if (base::StartsWithASCII(lines[i], kFirmwarePrefix, false)) {
  82       std::string str = lines[i].substr(std::string(kFirmwarePrefix).size());
  83       size_t found = str.find_first_not_of("| ");
  84       if (found != std::string::npos)
  85         return str.substr(found);
  86     }
  87   }
  88   return std::string();
  89 }
  90
  91 }  // namespace version_loader
  92 }  // namespace chromeos