chrome_frame/chrome_launcher_utils.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 "chrome_frame/chrome_launcher_utils.h"
   6
   7 #include "base/base_switches.h"
   8 #include "base/command_line.h"
   9 #include "base/file_util.h"
  10 #include "base/logging.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/path_service.h"
  13 #include "base/string_util.h"
  14 #include "base/win/windows_version.h"
  15 #include "chrome/common/chrome_constants.h"
  16 #include "chrome/common/chrome_switches.h"
  17 #include "chrome_frame/chrome_frame_automation.h"
  18 #include "chrome_frame/policy_settings.h"
  19
  20 namespace {
  21
  22 const char kUpdateCommandFlag[] = "--update-cmd";
  23
  24 // Searches for the path to chrome_launcher.exe. Will return false if this
  25 // executable cannot be found, otherwise the command line will be placed in
  26 // |command_line|.
  27 bool CreateChromeLauncherCommandLine(scoped_ptr<CommandLine>* command_line) {
  28   DCHECK(command_line);
  29   bool success = false;
  30   // The launcher EXE will be in the same directory as the Chrome Frame DLL,
  31   // so create a full path to it based on this assumption.
  32   base::FilePath module_path;
  33   if (PathService::Get(base::FILE_MODULE, &module_path)) {
  34     base::FilePath current_dir = module_path.DirName();
  35     base::FilePath chrome_launcher = current_dir.Append(
  36         chrome_launcher::kLauncherExeBaseName);
  37     if (file_util::PathExists(chrome_launcher)) {
  38       command_line->reset(new CommandLine(chrome_launcher));
  39       success = true;
  40     }
  41   }
  42
  43   if (!success) {
  44     NOTREACHED() << "Could not find " << chrome_launcher::kLauncherExeBaseName
  45                  << " in output dir.";
  46   }
  47
  48   return success;
  49 }
  50
  51 }  // namespace
  52
  53 namespace chrome_launcher {
  54
  55 const wchar_t kLauncherExeBaseName[] = L"chrome_launcher.exe";
  56
  57 bool CreateUpdateCommandLine(const std::wstring& update_command,
  58                              scoped_ptr<CommandLine>* command_line) {
  59   DCHECK(command_line);
  60   bool success = false;
  61
  62   if (CreateChromeLauncherCommandLine(command_line)) {
  63     (*command_line)->AppendArg(kUpdateCommandFlag);
  64     (*command_line)->AppendArg(WideToASCII(update_command));
  65     success = true;
  66   }
  67
  68   return success;
  69 }
  70
  71 bool CreateLaunchCommandLine(scoped_ptr<CommandLine>* command_line) {
  72   DCHECK(command_line);
  73
  74   // Shortcut for OS versions that don't need the integrity broker.
  75   if (base::win::GetVersion() < base::win::VERSION_VISTA) {
  76     command_line->reset(new CommandLine(GetChromeExecutablePath()));
  77
  78     // When we do not use the Chrome Launcher, we need to add the optional extra
  79     // parameters from the group policy here (this is normally done by the
  80     // chrome launcher).  We don't do this when we use the launcher as the
  81     // optional arguments could trip off sanitization checks and prevent Chrome
  82     // from being launched.
  83     const CommandLine& additional_params =
  84         PolicySettings::GetInstance()->AdditionalLaunchParameters();
  85     command_line->get()->AppendArguments(additional_params, false);
  86     return true;
  87   }
  88
  89   return CreateChromeLauncherCommandLine(command_line);
  90 }
  91
  92 base::FilePath GetChromeExecutablePath() {
  93   base::FilePath cur_path;
  94   PathService::Get(base::DIR_MODULE, &cur_path);
  95   cur_path = cur_path.Append(chrome::kBrowserProcessExecutableName);
  96
  97   // The installation model for Chrome places the DLLs in a versioned
  98   // sub-folder one down from the Chrome executable. If we fail to find
  99   // chrome.exe in the current path, try looking one up and launching that
 100   // instead.
 101   if (!file_util::PathExists(cur_path)) {
 102     PathService::Get(base::DIR_MODULE, &cur_path);
 103     cur_path = cur_path.DirName().Append(chrome::kBrowserProcessExecutableName);
 104   }
 105
 106   return cur_path;
 107 }
 108
 109 }  // namespace chrome_launcher