OLD | NEW |
(Empty) | |
| 1 // Copyright 2016 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/install_static/product_install_details.h" |
| 6 |
| 7 #include <windows.h> |
| 8 #include <assert.h> |
| 9 |
| 10 #include <algorithm> |
| 11 |
| 12 #include "chrome/install_static/install_modes.h" |
| 13 #include "chrome/install_static/install_util.h" |
| 14 #include "chrome_elf/nt_registry/nt_registry.h" |
| 15 |
| 16 namespace install_static { |
| 17 |
| 18 namespace { |
| 19 |
| 20 // Returns the executable path for the current process. |
| 21 std::wstring GetCurrentProcessExePath() { |
| 22 std::wstring exe_path(MAX_PATH, L'\0'); |
| 23 DWORD length = ::GetModuleFileName(nullptr, &exe_path[0], exe_path.size()); |
| 24 if (!length) |
| 25 return std::wstring(); |
| 26 exe_path.resize(length); |
| 27 return exe_path; |
| 28 } |
| 29 |
| 30 const InstallConstants* FindInstallMode(const std::wstring& suffix) { |
| 31 // Search for a mode with the matching suffix. |
| 32 for (int i = 0; i < NUM_INSTALL_MODES; ++i) { |
| 33 const InstallConstants& mode = kInstallModes[i]; |
| 34 if (!_wcsicmp(suffix.c_str(), mode.install_suffix)) |
| 35 return &mode; |
| 36 } |
| 37 // The first mode is always the default if all else fails. |
| 38 return &kInstallModes[0]; |
| 39 } |
| 40 |
| 41 } // namespace |
| 42 |
| 43 void InitializeProductDetailsForPrimaryModule() { |
| 44 InstallDetails::SetForProcess(MakeProductDetails(GetCurrentProcessExePath())); |
| 45 } |
| 46 |
| 47 bool IsPathParentOf(const wchar_t* parent, |
| 48 size_t parent_len, |
| 49 const std::wstring& path) { |
| 50 // Ignore all terminating path separators in |parent|. |
| 51 while (parent_len && parent[parent_len - 1] == L'\\') |
| 52 --parent_len; |
| 53 // Pass if the parent was all separators. |
| 54 if (!parent_len) |
| 55 return false; |
| 56 // This is a match if |parent| exactly matches |path| or is followed by a |
| 57 // separator. |
| 58 return !::wcsnicmp(path.c_str(), parent, parent_len) && |
| 59 (path.size() == parent_len || path[parent_len] == L'\\'); |
| 60 } |
| 61 |
| 62 bool PathIsInProgramFiles(const std::wstring& path) { |
| 63 static constexpr const wchar_t* kProgramFilesVariables[] = { |
| 64 L"PROGRAMFILES", // With or without " (x86)" according to exe bitness. |
| 65 L"PROGRAMFILES(X86)", // Always "C:\Program Files (x86)" |
| 66 L"PROGRAMW6432", // Always "C:\Program Files" under WoW64. |
| 67 }; |
| 68 wchar_t value[MAX_PATH]; |
| 69 *value = L'\0'; |
| 70 for (const wchar_t* variable : kProgramFilesVariables) { |
| 71 *value = L'\0'; |
| 72 DWORD ret = ::GetEnvironmentVariableW(variable, value, _countof(value)); |
| 73 if (ret && ret < _countof(value) && IsPathParentOf(value, ret, path)) |
| 74 return true; |
| 75 } |
| 76 |
| 77 return false; |
| 78 } |
| 79 |
| 80 std::wstring GetInstallSuffix(const std::wstring& exe_path) { |
| 81 // Search backwards from the end of the path for "\Application", using a |
| 82 // manual search for the sake of case-insensitivity. |
| 83 static constexpr wchar_t kInstallBinaryDir[] = L"\\Application"; |
| 84 constexpr size_t kInstallBinaryDirLength = _countof(kInstallBinaryDir) - 1; |
| 85 if (exe_path.size() < kProductPathNameLength + kInstallBinaryDirLength) |
| 86 return std::wstring(); |
| 87 std::wstring::const_reverse_iterator scan = |
| 88 exe_path.crbegin() + (kInstallBinaryDirLength - 1); |
| 89 while (_wcsnicmp(&*scan, kInstallBinaryDir, kInstallBinaryDirLength) && |
| 90 ++scan != exe_path.crend()) { |
| 91 } |
| 92 if (scan == exe_path.crend()) |
| 93 return std::wstring(); |
| 94 |
| 95 // Ensure that the dir is followed by a separator or is at the end of the |
| 96 // path. |
| 97 if (scan - exe_path.crbegin() != kInstallBinaryDirLength - 1 && |
| 98 *(scan - kInstallBinaryDirLength) != L'\\') { |
| 99 return std::wstring(); |
| 100 } |
| 101 |
| 102 // Scan backwards to the next separator or the beginning of the path. |
| 103 std::wstring::const_reverse_iterator name = |
| 104 std::find(scan + 1, exe_path.crend(), L'\\'); |
| 105 // Back up one character to ignore the separator/end of iteration. |
| 106 if (name == exe_path.crend()) |
| 107 name = exe_path.crbegin() + exe_path.size() - 1; |
| 108 else |
| 109 --name; |
| 110 |
| 111 // Check for a match of the product directory name. |
| 112 if (_wcsnicmp(&*name, kProductPathName, kProductPathNameLength)) |
| 113 return std::wstring(); |
| 114 |
| 115 // Return the (possibly empty) suffix betwixt the product name and install |
| 116 // binary dir. |
| 117 return std::wstring(&*(name - kProductPathNameLength), |
| 118 (name - scan) - kProductPathNameLength); |
| 119 } |
| 120 |
| 121 bool IsMultiInstall(const InstallConstants& mode, bool system_level) { |
| 122 assert(mode.supports_multi_install); |
| 123 std::wstring args; |
| 124 return nt::QueryRegValueSZ(system_level ? nt::HKLM : nt::HKCU, nt::WOW6432, |
| 125 GetClientStateKeyPath(mode.app_guid).c_str(), |
| 126 L"UninstallArguments", &args) && |
| 127 args.find(L"--multi-install") != std::wstring::npos; |
| 128 } |
| 129 |
| 130 std::unique_ptr<PrimaryInstallDetails> MakeProductDetails( |
| 131 const std::wstring& exe_path) { |
| 132 std::unique_ptr<PrimaryInstallDetails> details(new PrimaryInstallDetails()); |
| 133 |
| 134 const InstallConstants* mode = FindInstallMode(GetInstallSuffix(exe_path)); |
| 135 const bool system_level = |
| 136 mode->supports_system_level && PathIsInProgramFiles(exe_path); |
| 137 const bool multi_install = |
| 138 mode->supports_multi_install && IsMultiInstall(*mode, system_level); |
| 139 |
| 140 details->set_mode(mode); |
| 141 details->set_system_level(system_level); |
| 142 details->set_multi_install(multi_install); |
| 143 details->set_channel(DetermineChannel(*mode, system_level, multi_install)); |
| 144 |
| 145 return details; |
| 146 } |
| 147 |
| 148 } // namespace install_static |
OLD | NEW |