Repo created

TMessagesProj/jni/voip/webrtc/base/system/sys_info_chromeos.cc

@@ -0,0 +1,225 @@
+// 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/system/sys_info.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <sys/utsname.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/stl_util.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/strings/stringprintf.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;
+    std::unique_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) {
+    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_; }
+  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 < base::size(kLinuxStandardBaseVersionKeys); ++i) {
+      std::string key = kLinuxStandardBaseVersionKeys[i];
+      if (GetLsbReleaseValue(key, &version) && !version.empty())
+        break;
+    }
+    StringTokenizer tokenizer(version, ".");
+    if (tokenizer.GetNext()) {
+      StringToInt(tokenizer.token_piece(), &major_version_);
+    }
+    if (tokenizer.GetNext()) {
+      StringToInt(tokenizer.token_piece(), &minor_version_);
+    }
+    if (tokenizer.GetNext()) {
+      StringToInt(tokenizer.token_piece(), &bugfix_version_);
+    }
+
+    // Check release name for Chrome OS.
+    std::string release_name;
+    if (GetLsbReleaseValue(kChromeOsReleaseNameKey, &release_name)) {
+      for (size_t i = 0; i < base::size(kChromeOsReleaseNames); ++i) {
+        if (release_name == kChromeOsReleaseNames[i]) {
+          is_running_on_chromeos_ = true;
+          break;
+        }
+      }
+    }
+  }
+
+  using LsbReleaseMap = std::map<std::string, std::string>;
+  Time lsb_release_time_;
+  LsbReleaseMap lsb_release_map_;
+  int32_t major_version_;
+  int32_t minor_version_;
+  int32_t bugfix_version_;
+  bool is_running_on_chromeos_;
+};
+
+static LazyInstance<ChromeOSVersionInfo>::Leaky 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
+std::string SysInfo::OperatingSystemVersion() {
+  int32_t major, minor, bugfix;
+  GetChromeOSVersionInfo().GetVersionNumbers(&major, &minor, &bugfix);
+  return base::StringPrintf("%d.%d.%d", major, minor, bugfix);
+}
+
+// static
+std::string SysInfo::KernelVersion() {
+  struct utsname info;
+  if (uname(&info) < 0) {
+    NOTREACHED();
+    return std::string();
+  }
+  return std::string(info.release);
+}
+
+// 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) {
+  std::unique_ptr<Environment> env(Environment::Create());
+  env->SetVar(kLsbReleaseKey, lsb_release);
+  env->SetVar(kLsbReleaseTimeKey, NumberToString(lsb_release_time.ToDoubleT()));
+  g_chrome_os_version_info.Get().Parse();
+}
+
+}  // namespace base