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// Copyright (c) 2010 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.
//
// This file declares utility functions for the installer. The original reason
// for putting these functions in installer\util library is so that we can
// separate out the critical logic and write unit tests for it.
#ifndef CHROME_INSTALLER_UTIL_INSTALL_UTIL_H__
#define CHROME_INSTALLER_UTIL_INSTALL_UTIL_H__
#pragma once
#include <tchar.h>
#include <windows.h>
#include <string>
#include "base/basictypes.h"
#include "chrome/installer/util/util_constants.h"
#include "chrome/installer/util/version.h"
class WorkItemList;
class RegKey;
// This is a utility class that provides common installation related
// utility methods that can be used by installer and also unit tested
// independently.
class InstallUtil {
public:
// Launches given exe as admin on Vista.
static bool ExecuteExeAsAdmin(const std::wstring& exe,
const std::wstring& params,
DWORD* exit_code);
// Reads the uninstall command for Chromium from registry and returns it.
// If system_install is true the command is read from HKLM, otherwise
// from HKCU.
static std::wstring GetChromeUninstallCmd(bool system_install);
// Find the version of Chrome installed on the system by checking the
// Google Update registry key. Returns the version or NULL if no version is
// found.
// system_install: if true, looks for version number under the HKLM root,
// otherwise looks under the HKCU.
static installer::Version* GetChromeVersion(bool system_install);
// This function checks if the current OS is supported for Chromium.
static bool IsOSSupported();
// This function sets installer error information in registry so that Google
// Update can read it and display to the user.
static void WriteInstallerResult(bool system_install,
installer_util::InstallStatus status,
int string_resource_id,
const std::wstring* const launch_cmd);
// Returns true if this installation path is per user, otherwise returns
// false (per machine install, meaning: the exe_path contains path to
// Program Files).
static bool IsPerUserInstall(const wchar_t* const exe_path);
// Returns true if this is a Chrome Frame installation (as indicated by the
// presence of --chrome-frame on the command line) or if this is running
// inside of the Chrome Frame dll. Also returns true if a master.preferences
// file containing chrome_frame: true is specified on the command line.
static bool IsChromeFrameProcess();
// Returns true if this is running setup process for Chrome SxS (as
// indicated by the presence of --chrome-sxs on the command line) or if this
// is running Chrome process from the Chrome SxS installation (as indicated
// by either --chrome-sxs or the executable path).
static bool IsChromeSxSProcess();
// Returns true if this setup process is running as an install managed by an
// MSI wrapper. There are three things that are checked:
// 1) the presence of --msi on the command line
// 2) the presence of "msi": true in the master preferences file
// 3) the presence of a DWORD value in the ClientState key called msi with
// value 1
// NOTE: This method is NOT thread safe.
static bool IsMSIProcess(bool system_level);
// Sets the boolean MSI marker for this installation if set is true or clears
// it otherwise. The MSI marker is stored in the registry under the
// ClientState key.
static bool SetMSIMarker(bool system_level, bool set);
// Adds all DLLs in install_path whose names are given by dll_names to a
// work item list containing registration or unregistration actions.
//
// install_path: Install path containing the registrable DLLs.
// dll_names: the array of strings containing dll_names
// dll_names_count: the number of DLL names in dll_names
// do_register: whether to register or unregister the DLLs
// registration_list: the WorkItemList that this method populates
//
// Returns true if at least one DLL was successfully added to
// registration_list.
static bool BuildDLLRegistrationList(const std::wstring& install_path,
const wchar_t** const dll_names,
int dll_names_count,
bool do_register,
WorkItemList* registration_list);
// Deletes the registry key at path key_path under the key given by root_key.
static bool DeleteRegistryKey(RegKey& root_key, const std::wstring& key_path);
// Deletes the registry value named value_name at path key_path under the key
// given by reg_root.
static bool DeleteRegistryValue(HKEY reg_root, const std::wstring& key_path,
const std::wstring& value_name);
private:
DISALLOW_COPY_AND_ASSIGN(InstallUtil);
};
#endif // CHROME_INSTALLER_UTIL_INSTALL_UTIL_H__
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