OLD | NEW |
(Empty) | |
| 1 // Copyright (c) 2013 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/browser/importer/ie_importer_test_registry_overrider_win.h" |
| 6 |
| 7 #include <windows.h> |
| 8 |
| 9 #include <string> |
| 10 |
| 11 #include "base/environment.h" |
| 12 #include "base/guid.h" |
| 13 #include "base/memory/scoped_ptr.h" |
| 14 #include "base/strings/string_number_conversions.h" |
| 15 #include "base/utf_string_conversions.h" |
| 16 #include "base/win/registry.h" |
| 17 |
| 18 namespace { |
| 19 |
| 20 // The key to which a random subkey will be appended. This key itself will never |
| 21 // be deleted. |
| 22 const wchar_t kTestHKCUOverrideKey[] = L"SOFTWARE\\Chromium Unit Tests"; |
| 23 const char kTestHKCUOverrideEnvironmentVariable[] = |
| 24 "IE_IMPORTER_TEST_OVERRIDE_HKCU"; |
| 25 |
| 26 base::string16 GetTestKeyFromSubKey(const base::string16& subkey) { |
| 27 base::string16 key(kTestHKCUOverrideKey); |
| 28 key.push_back(L'\\'); |
| 29 key.append(subkey); |
| 30 return key; |
| 31 } |
| 32 |
| 33 } // namespace |
| 34 |
| 35 //////////////////////////////////////////////////////////////////////////////// |
| 36 // IEImporterTestRegistryOverrider, public: |
| 37 |
| 38 IEImporterTestRegistryOverrider::IEImporterTestRegistryOverrider() |
| 39 : override_performed_(false), override_initiated_(false) { |
| 40 } |
| 41 |
| 42 IEImporterTestRegistryOverrider::~IEImporterTestRegistryOverrider() { |
| 43 base::AutoLock auto_lock(lock_.Get()); |
| 44 if (override_performed_) { |
| 45 override_active_in_process_ = false; |
| 46 |
| 47 DWORD result = RegOverridePredefKey(HKEY_CURRENT_USER, NULL); |
| 48 DLOG_IF(ERROR, result != ERROR_SUCCESS) |
| 49 << "Failed to unset current override"; |
| 50 |
| 51 if (override_initiated_) { |
| 52 base::string16 subkey; |
| 53 if (!GetSubKeyFromEnvironment(&subkey)) { |
| 54 NOTREACHED(); |
| 55 } else { |
| 56 base::string16 key(GetTestKeyFromSubKey(subkey)); |
| 57 base::win::RegKey reg_key(HKEY_CURRENT_USER, key.c_str(), |
| 58 KEY_ALL_ACCESS); |
| 59 DCHECK(reg_key.Valid()); |
| 60 reg_key.DeleteKey(L""); |
| 61 } |
| 62 |
| 63 scoped_ptr<base::Environment> env(base::Environment::Create()); |
| 64 env->UnSetVar(kTestHKCUOverrideEnvironmentVariable); |
| 65 } |
| 66 } |
| 67 } |
| 68 |
| 69 bool IEImporterTestRegistryOverrider::SetRegistryOverride() { |
| 70 base::AutoLock auto_lock(lock_.Get()); |
| 71 DCHECK(!GetSubKeyFromEnvironment(NULL)); |
| 72 override_initiated_ = true; |
| 73 scoped_ptr<base::Environment> env(base::Environment::Create()); |
| 74 const base::string16 random_subkey(UTF8ToUTF16(base::GenerateGUID())); |
| 75 return StartRegistryOverride(random_subkey) && |
| 76 env->SetVar(kTestHKCUOverrideEnvironmentVariable, |
| 77 UTF16ToUTF8(random_subkey)); |
| 78 } |
| 79 |
| 80 bool IEImporterTestRegistryOverrider::StartRegistryOverrideIfNeeded() { |
| 81 base::AutoLock auto_lock(lock_.Get()); |
| 82 base::string16 subkey; |
| 83 if (!GetSubKeyFromEnvironment(&subkey)) |
| 84 return true; |
| 85 return StartRegistryOverride(subkey); |
| 86 } |
| 87 |
| 88 //////////////////////////////////////////////////////////////////////////////// |
| 89 // IEImporterTestRegistryOverrider, private: |
| 90 |
| 91 bool IEImporterTestRegistryOverrider::StartRegistryOverride( |
| 92 const base::string16& subkey) { |
| 93 lock_.Get().AssertAcquired(); |
| 94 // Override the registry whether |override_active_in_process_| or not as some |
| 95 // Windows API calls seem to reset the override (IUrlHistoryStg2::AddUrl is |
| 96 // suspected on Win7-). However, make sure to first undo any existing override |
| 97 // as this method will otherwise generate a fake key within the current fake |
| 98 // key. |
| 99 DWORD result = RegOverridePredefKey(HKEY_CURRENT_USER, NULL); |
| 100 DLOG_IF(ERROR, result != ERROR_SUCCESS) << "Failed to unset current override"; |
| 101 |
| 102 const base::string16 key(GetTestKeyFromSubKey(subkey)); |
| 103 base::win::RegKey temp_hkcu_hive_key; |
| 104 result = temp_hkcu_hive_key.Create(HKEY_CURRENT_USER, key.c_str(), |
| 105 KEY_ALL_ACCESS); |
| 106 if (result != ERROR_SUCCESS || !temp_hkcu_hive_key.Valid()) { |
| 107 DPLOG(ERROR) << result; |
| 108 return false; |
| 109 } |
| 110 |
| 111 if (!override_active_in_process_) { |
| 112 // Only take ownership of the override if it wasn't already set in this |
| 113 // process. |
| 114 override_performed_ = true; |
| 115 override_active_in_process_ = true; |
| 116 } |
| 117 return RegOverridePredefKey(HKEY_CURRENT_USER, |
| 118 temp_hkcu_hive_key.Handle()) == ERROR_SUCCESS; |
| 119 } |
| 120 |
| 121 bool IEImporterTestRegistryOverrider::GetSubKeyFromEnvironment( |
| 122 base::string16* subkey) { |
| 123 lock_.Get().AssertAcquired(); |
| 124 scoped_ptr<base::Environment> env(base::Environment::Create()); |
| 125 std::string value; |
| 126 bool result = env->GetVar(kTestHKCUOverrideEnvironmentVariable, &value); |
| 127 if (result && subkey) |
| 128 *subkey = UTF8ToUTF16(value); |
| 129 return result; |
| 130 } |
| 131 |
| 132 // static |
| 133 bool IEImporterTestRegistryOverrider::override_active_in_process_ = false; |
| 134 |
| 135 // static |
| 136 base::LazyInstance<base::Lock>::Leaky IEImporterTestRegistryOverrider::lock_ = |
| 137 LAZY_INSTANCE_INITIALIZER; |
OLD | NEW |