blob: f9557eed91394d11425af2c529c7f5106353d2a3 [file] [log] [blame]
// 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 "chrome/browser/first_run/upgrade_util.h"
#include <windows.h>
#include <psapi.h>
#include <shellapi.h>
#include <algorithm>
#include <string>
#include "base/base_paths.h"
#include "base/command_line.h"
#include "base/environment.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "base/process/launch.h"
#include "base/process/process_handle.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/win/metro.h"
#include "base/win/registry.h"
#include "base/win/scoped_comptr.h"
#include "base/win/windows_version.h"
#include "chrome/browser/first_run/upgrade_util_win.h"
#include "chrome/browser/shell_integration.h"
#include "chrome/common/chrome_constants.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/installer/util/browser_distribution.h"
#include "chrome/installer/util/google_update_constants.h"
#include "chrome/installer/util/install_util.h"
#include "chrome/installer/util/shell_util.h"
#include "chrome/installer/util/util_constants.h"
#include "google_update/google_update_idl.h"
namespace {
bool GetNewerChromeFile(base::FilePath* path) {
if (!PathService::Get(base::DIR_EXE, path))
return false;
*path = path->Append(installer::kChromeNewExe);
return true;
bool InvokeGoogleUpdateForRename() {
base::win::ScopedComPtr<IProcessLauncher> ipl;
if (!FAILED(ipl.CreateInstance(__uuidof(ProcessLauncherClass)))) {
ULONG_PTR phandle = NULL;
DWORD id = GetCurrentProcessId();
BrowserDistribution* dist = BrowserDistribution::GetDistribution();
if (!FAILED(ipl->LaunchCmdElevated(dist->GetAppGuid().c_str(),
&phandle))) {
HANDLE handle = HANDLE(phandle);
WaitForSingleObject(handle, INFINITE);
DWORD exit_code;
::GetExitCodeProcess(handle, &exit_code);
if (exit_code == installer::RENAME_SUCCESSFUL)
return true;
return false;
base::FilePath GetMetroRelauncherPath(const base::FilePath& chrome_exe,
const std::string& version_str) {
base::FilePath path(chrome_exe.DirName());
// The relauncher is ordinarily in the version directory. When running in a
// build tree however (where CHROME_VERSION is not set in the environment)
// look for it in Chrome's directory.
if (!version_str.empty())
path = path.AppendASCII(version_str);
return path.Append(installer::kDelegateExecuteExe);
} // namespace
namespace upgrade_util {
const char kRelaunchModeMetro[] = "relaunch.mode.metro";
const char kRelaunchModeDesktop[] = "relaunch.mode.desktop";
const char kRelaunchModeDefault[] = "relaunch.mode.default";
// TODO(shrikant): Have a map/array to quickly map enum to strings.
std::string RelaunchModeEnumToString(const RelaunchMode relaunch_mode) {
if (relaunch_mode == RELAUNCH_MODE_METRO)
return kRelaunchModeMetro;
if (relaunch_mode == RELAUNCH_MODE_DESKTOP)
return kRelaunchModeDesktop;
// For the purpose of code flow, even in case of wrong value we will
// return default re-launch mode.
return kRelaunchModeDefault;
RelaunchMode RelaunchModeStringToEnum(const std::string& relaunch_mode) {
if (relaunch_mode == kRelaunchModeMetro)
if (relaunch_mode == kRelaunchModeDesktop)
bool RelaunchChromeHelper(const CommandLine& command_line,
const RelaunchMode& relaunch_mode) {
scoped_ptr<base::Environment> env(base::Environment::Create());
std::string version_str;
// Get the version variable and remove it from the environment.
if (env->GetVar(chrome::kChromeVersionEnvVar, &version_str))
base::FilePath chrome_exe;
if (!PathService::Get(base::FILE_EXE, &chrome_exe)) {
return false;
// Explicitly make sure to relaunch chrome.exe rather than old_chrome.exe.
// This can happen when old_chrome.exe is launched by a user.
CommandLine chrome_exe_command_line = command_line;
if (base::win::GetVersion() < base::win::VERSION_WIN8 &&
relaunch_mode != RELAUNCH_MODE_METRO &&
relaunch_mode != RELAUNCH_MODE_DESKTOP)
return base::LaunchProcess(chrome_exe_command_line,
base::LaunchOptions(), NULL);
// On Windows 8 we always use the delegate_execute for re-launching chrome.
// On Windows 7 we use delegate_execute for re-launching chrome into Windows
// ASH.
// Pass this Chrome's Start Menu shortcut path to the relauncher so it can re-
// activate chrome via ShellExecute which will wait until we exit. Since
// ShellExecute does not support handle passing to the child process we create
// a uniquely named mutex that we aquire and never release. So when we exit,
// Windows marks our mutex as abandoned and the wait is satisfied. The format
// of the named mutex is important. See DelegateExecuteOperation for more
// details.
base::string16 mutex_name =
base::StringPrintf(L"chrome.relaunch.%d", ::GetCurrentProcessId());
HANDLE mutex = ::CreateMutexW(NULL, TRUE, mutex_name.c_str());
// The |mutex| handle needs to be leaked. See comment above.
if (!mutex) {
return false;
if (::GetLastError() == ERROR_ALREADY_EXISTS) {
NOTREACHED() << "Relaunch mutex already exists";
return false;
CommandLine relaunch_cmd(CommandLine::NO_PROGRAM);
relaunch_cmd.AppendSwitchNative(switches::kWaitForMutex, mutex_name);
if (relaunch_mode != RELAUNCH_MODE_DEFAULT) {
relaunch_cmd.AppendSwitch(relaunch_mode == RELAUNCH_MODE_METRO?
switches::kForceImmersive : switches::kForceDesktop);
base::string16 params(relaunch_cmd.GetCommandLineString());
base::string16 path(GetMetroRelauncherPath(chrome_exe, version_str).value());
SHELLEXECUTEINFO sei = { sizeof(sei) };
sei.nShow = SW_SHOWNORMAL;
sei.lpFile = path.c_str();
sei.lpParameters = params.c_str();
if (!::ShellExecuteExW(&sei)) {
NOTREACHED() << "ShellExecute failed with " << GetLastError();
return false;
DWORD pid = ::GetProcessId(sei.hProcess);
if (!pid)
return false;
// The next call appears to be needed if we are relaunching from desktop into
// metro mode. The observed effect if not done is that chrome starts in metro
// mode but it is not given focus and it gets killed by windows after a few
// seconds.
return true;
bool RelaunchChromeBrowser(const CommandLine& command_line) {
return RelaunchChromeHelper(command_line, RELAUNCH_MODE_DEFAULT);
bool RelaunchChromeWithMode(const CommandLine& command_line,
const RelaunchMode& relaunch_mode) {
return RelaunchChromeHelper(command_line, relaunch_mode);
bool IsUpdatePendingRestart() {
base::FilePath new_chrome_exe;
if (!GetNewerChromeFile(&new_chrome_exe))
return false;
return base::PathExists(new_chrome_exe);
bool SwapNewChromeExeIfPresent() {
base::FilePath new_chrome_exe;
if (!GetNewerChromeFile(&new_chrome_exe))
return false;
if (!base::PathExists(new_chrome_exe))
return false;
base::FilePath cur_chrome_exe;
if (!PathService::Get(base::FILE_EXE, &cur_chrome_exe))
return false;
// Open up the registry key containing current version and rename information.
bool user_install =
HKEY reg_root = user_install ? HKEY_CURRENT_USER : HKEY_LOCAL_MACHINE;
BrowserDistribution *dist = BrowserDistribution::GetDistribution();
base::win::RegKey key;
if (key.Open(reg_root, dist->GetVersionKey().c_str(),
// First try to rename exe by launching rename command ourselves.
std::wstring rename_cmd;
if (key.ReadValue(google_update::kRegRenameCmdField,
&rename_cmd) == ERROR_SUCCESS) {
base::win::ScopedHandle handle;
base::LaunchOptions options;
options.wait = true;
options.start_hidden = true;
if (base::LaunchProcess(rename_cmd, options, &handle)) {
DWORD exit_code;
::GetExitCodeProcess(handle, &exit_code);
if (exit_code == installer::RENAME_SUCCESSFUL)
return true;
// Rename didn't work so try to rename by calling Google Update
return InvokeGoogleUpdateForRename();
bool IsRunningOldChrome() {
// This figures out the actual file name that the section containing the
// mapped exe refers to. This is used instead of GetModuleFileName because the
// .exe may have been renamed out from under us while we've been running which
// GetModuleFileName won't notice.
wchar_t mapped_file_name[MAX_PATH * 2] = {};
if (!::GetMappedFileName(::GetCurrentProcess(),
arraysize(mapped_file_name))) {
return false;
base::FilePath file_name(base::FilePath(mapped_file_name).BaseName());
return base::FilePath::CompareEqualIgnoreCase(file_name.value(),
bool DoUpgradeTasks(const CommandLine& command_line) {
// The DelegateExecute verb handler finalizes pending in-use updates for
// metro mode launches, as Chrome cannot be gracefully relaunched when
// running in this mode.
if (base::win::IsMetroProcess())
return false;
if (!SwapNewChromeExeIfPresent() && !IsRunningOldChrome())
return false;
// At this point the chrome.exe has been swapped with the new one.
if (!RelaunchChromeBrowser(command_line)) {
// The re-launch fails. Feel free to panic now.
return true;
} // namespace upgrade_util