chrome/installer/setup/setup_util.h

   1 // Copyright (c) 2012 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 // This file declares util functions for setup project. It also declares a
   6 // few functions that the Chrome component updater uses for patching binary
   7 // deltas.
   8
   9 #ifndef CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
  10 #define CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
  11
  12 #include <windows.h>
  13
  14 #include "base/basictypes.h"
  15 #include "base/strings/string16.h"
  16 #include "base/win/scoped_handle.h"
  17 #include "chrome/installer/util/browser_distribution.h"
  18 #include "chrome/installer/util/util_constants.h"
  19
  20 class AppRegistrationData;
  21
  22 namespace base {
  23 class CommandLine;
  24 class FilePath;
  25 class Version;
  26 }
  27
  28 namespace installer {
  29
  30 class InstallationState;
  31 class InstallerState;
  32 class ProductState;
  33
  34 // Applies a patch file to source file using Courgette. Returns 0 in case of
  35 // success. In case of errors, it returns kCourgetteErrorOffset + a Courgette
  36 // status code, as defined in courgette/courgette.h
  37 int CourgettePatchFiles(const base::FilePath& src,
  38                         const base::FilePath& patch,
  39                         const base::FilePath& dest);
  40
  41 // Applies a patch file to source file using bsdiff. This function uses
  42 // Courgette's flavor of bsdiff. Returns 0 in case of success, or
  43 // kBsdiffErrorOffset + a bsdiff status code in case of errors.
  44 // See courgette/third_party/bsdiff.h for details.
  45 int BsdiffPatchFiles(const base::FilePath& src,
  46                      const base::FilePath& patch,
  47                      const base::FilePath& dest);
  48
  49 // Find the version of Chrome from an install source directory.
  50 // Chrome_path should contain at least one version folder.
  51 // Returns the maximum version found or NULL if no version is found.
  52 Version* GetMaxVersionFromArchiveDir(const base::FilePath& chrome_path);
  53
  54 // Returns the uncompressed archive of the installed version that serves as the
  55 // source for patching.
  56 base::FilePath FindArchiveToPatch(const InstallationState& original_state,
  57                                   const InstallerState& installer_state);
  58
  59 // Spawns a new process that waits for a specified amount of time before
  60 // attempting to delete |path|.  This is useful for setup to delete the
  61 // currently running executable or a file that we cannot close right away but
  62 // estimate that it will be possible after some period of time.
  63 // Returns true if a new process was started, false otherwise.  Note that
  64 // given the nature of this function, it is not possible to know if the
  65 // delete operation itself succeeded.
  66 bool DeleteFileFromTempProcess(const base::FilePath& path,
  67                                uint32 delay_before_delete_ms);
  68
  69 // Returns true and populates |setup_exe| with the path to an existing product
  70 // installer if one is found that is newer than the currently running installer
  71 // (|installer_version|).
  72 bool GetExistingHigherInstaller(const InstallationState& original_state,
  73                                 bool system_install,
  74                                 const base::Version& installer_version,
  75                                 base::FilePath* setup_exe);
  76
  77 // Invokes the pre-existing |setup_exe| to handle the current operation (as
  78 // dictated by |command_line|). An installerdata file, if specified, is first
  79 // unconditionally copied into place so that it will be in effect in case the
  80 // invoked |setup_exe| runs the newly installed product prior to exiting.
  81 // Returns true if |setup_exe| was launched, false otherwise.
  82 bool DeferToExistingInstall(const base::FilePath& setup_exe,
  83                             const base::CommandLine& command_line,
  84                             const InstallerState& installer_state,
  85                             const base::FilePath& temp_path,
  86                             InstallStatus* install_status);
  87
  88 // Returns true if the product |type| will be installed after the current
  89 // setup.exe instance have carried out installation / uninstallation, at
  90 // the level specified by |installer_state|.
  91 // This function only returns meaningful results for install and update
  92 // operations if called after CheckPreInstallConditions (see setup_main.cc).
  93 bool WillProductBePresentAfterSetup(
  94     const installer::InstallerState& installer_state,
  95     const installer::InstallationState& machine_state,
  96     BrowserDistribution::Type type);
  97
  98 // Drops the process down to background processing mode on supported OSes if it
  99 // was launched below the normal process priority. Returns true when background
 100 // procesing mode is entered.
 101 bool AdjustProcessPriority();
 102
 103 // Makes registry adjustments to migrate the Google Update state of |to_migrate|
 104 // from multi-install to single-install. This includes copying the usagestats
 105 // value and adjusting the ap values of all multi-install products.
 106 void MigrateGoogleUpdateStateMultiToSingle(
 107     bool system_level,
 108     BrowserDistribution::Type to_migrate,
 109     const installer::InstallationState& machine_state);
 110
 111 // Returns true if |install_status| represents a successful uninstall code.
 112 bool IsUninstallSuccess(InstallStatus install_status);
 113
 114 // Returns true if |cmd_line| contains unsupported (legacy) switches.
 115 bool ContainsUnsupportedSwitch(const base::CommandLine& cmd_line);
 116
 117 // Returns true if the processor is supported by chrome.
 118 bool IsProcessorSupported();
 119
 120 // Returns the "...\\Commands\\|name|" registry key for a product's |reg_data|.
 121 base::string16 GetRegistrationDataCommandKey(
 122     const AppRegistrationData& reg_data,
 123     const wchar_t* name);
 124
 125 // This class will enable the privilege defined by |privilege_name| on the
 126 // current process' token. The privilege will be disabled upon the
 127 // ScopedTokenPrivilege's destruction (unless it was already enabled when the
 128 // ScopedTokenPrivilege object was constructed).
 129 // Some privileges might require admin rights to be enabled (check is_enabled()
 130 // to know whether |privilege_name| was successfully enabled).
 131 class ScopedTokenPrivilege {
 132  public:
 133   explicit ScopedTokenPrivilege(const wchar_t* privilege_name);
 134   ~ScopedTokenPrivilege();
 135
 136   // Always returns true unless the privilege could not be enabled.
 137   bool is_enabled() const { return is_enabled_; }
 138
 139  private:
 140   // Always true unless the privilege could not be enabled.
 141   bool is_enabled_;
 142
 143   // A scoped handle to the current process' token. This will be closed
 144   // preemptively should enabling the privilege fail in the constructor.
 145   base::win::ScopedHandle token_;
 146
 147   // The previous state of the privilege this object is responsible for. As set
 148   // by AdjustTokenPrivileges() upon construction.
 149   TOKEN_PRIVILEGES previous_privileges_;
 150
 151   DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedTokenPrivilege);
 152 };
 153
 154 }  // namespace installer
 155
 156 #endif  // CHROME_INSTALLER_SETUP_SETUP_UTIL_H_