1 /* |
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2 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 #include <windows.h> |
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27 #include <shellapi.h> |
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28 |
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29 #include "WinSysInfo.h" |
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30 #include "FileUtils.h" |
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31 #include "WinErrorHandling.h" |
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32 |
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33 #pragma comment(lib, "Shell32") |
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34 |
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35 namespace SysInfo { |
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36 |
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37 tstring getTempDir() { |
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38 std::vector<TCHAR> buffer(MAX_PATH); |
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39 DWORD res = GetTempPath(static_cast<DWORD>(buffer.size()), buffer.data()); |
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40 if (res > buffer.size()) { |
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41 buffer.resize(res); |
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42 GetTempPath(static_cast<DWORD>(buffer.size()), buffer.data()); |
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43 } |
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44 return FileUtils::removeTrailingSlash(buffer.data()); |
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45 } |
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46 |
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47 namespace { |
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48 |
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49 template <class Func> |
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50 tstring getSystemDirImpl(Func func, const std::string& label) { |
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51 std::vector<TCHAR> buffer(MAX_PATH); |
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52 for (int i=0; i<2; i++) { |
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53 DWORD res = func(buffer.data(), static_cast<DWORD>(buffer.size())); |
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54 if (!res) { |
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55 JP_THROW(SysError(label + " failed", func)); |
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56 } |
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57 if (res < buffer.size()) { |
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58 return FileUtils::removeTrailingSlash(buffer.data()); |
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59 } |
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60 buffer.resize(res + 1); |
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61 } |
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62 JP_THROW("Unexpected reply from" + label); |
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63 } |
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64 |
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65 } // namespace |
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66 |
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67 tstring getSystem32Dir() { |
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68 return getSystemDirImpl(GetSystemDirectory, "GetSystemDirectory"); |
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69 } |
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70 |
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71 tstring getWIPath() { |
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72 return FileUtils::mkpath() << getSystem32Dir() << _T("msiexec.exe"); |
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73 } |
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74 |
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75 namespace { |
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76 |
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77 tstring getModulePath(HMODULE h) |
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78 { |
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79 std::vector<TCHAR> buf(MAX_PATH); |
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80 DWORD len = 0; |
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81 while (true) { |
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82 len = GetModuleFileName(h, buf.data(), (DWORD)buf.size()); |
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83 if (len < buf.size()) { |
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84 break; |
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85 } |
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86 // buffer is too small, increase it |
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87 buf.resize(buf.size() * 2); |
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88 } |
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89 |
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90 if (len == 0) { |
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91 // error occured |
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92 JP_THROW(SysError("GetModuleFileName failed", GetModuleFileName)); |
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93 } |
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94 return tstring(buf.begin(), buf.begin() + len); |
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95 } |
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96 |
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97 } // namespace |
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98 |
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99 tstring getProcessModulePath() { |
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100 return getModulePath(NULL); |
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101 } |
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102 |
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103 HMODULE getCurrentModuleHandle() |
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104 { |
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105 // get module handle for the address of this function |
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106 LPCWSTR address = reinterpret_cast<LPCWSTR>(getCurrentModuleHandle); |
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107 HMODULE hmodule = NULL; |
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108 if (!GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
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109 | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, address, &hmodule)) |
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110 { |
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111 JP_THROW(SysError(tstrings::any() << "GetModuleHandleExW failed", |
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112 GetModuleHandleExW)); |
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113 } |
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114 return hmodule; |
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115 } |
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116 |
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117 tstring getCurrentModulePath() |
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118 { |
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119 return getModulePath(getCurrentModuleHandle()); |
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120 } |
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121 |
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122 tstring_array getCommandArgs(CommandArgProgramNameMode progNameMode) |
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123 { |
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124 int argc = 0; |
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125 tstring_array result; |
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126 |
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127 LPWSTR *parsedArgs = CommandLineToArgvW(GetCommandLineW(), &argc); |
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128 if (parsedArgs == NULL) { |
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129 JP_THROW(SysError("CommandLineToArgvW failed", CommandLineToArgvW)); |
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130 } |
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131 // the 1st element contains program name |
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132 for (int i = progNameMode == ExcludeProgramName ? 1 : 0; i < argc; i++) { |
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133 result.push_back(parsedArgs[i]); |
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134 } |
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135 LocalFree(parsedArgs); |
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136 |
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137 return result; |
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138 } |
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139 |
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140 namespace { |
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141 |
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142 tstring getEnvVariableImpl(const tstring& name, bool* errorOccured=0) { |
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143 std::vector<TCHAR> buf(10); |
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144 SetLastError(ERROR_SUCCESS); |
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145 const DWORD size = GetEnvironmentVariable(name.c_str(), buf.data(), |
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146 DWORD(buf.size())); |
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147 if (GetLastError() == ERROR_ENVVAR_NOT_FOUND) { |
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148 if (errorOccured) { |
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149 *errorOccured = true; |
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150 return tstring(); |
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151 } |
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152 JP_THROW(SysError(tstrings::any() << "GetEnvironmentVariable(" |
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153 << name << ") failed. Variable not set", GetEnvironmentVariable)); |
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154 } |
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155 |
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156 if (size > buf.size()) { |
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157 buf.resize(size); |
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158 GetEnvironmentVariable(name.c_str(), buf.data(), DWORD(buf.size())); |
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159 if (GetLastError() != ERROR_SUCCESS) { |
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160 if (errorOccured) { |
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161 *errorOccured = true; |
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162 return tstring(); |
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163 } |
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164 JP_THROW(SysError(tstrings::any() << "GetEnvironmentVariable(" |
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165 << name << ") failed", GetEnvironmentVariable)); |
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166 } |
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167 } |
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168 |
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169 if (errorOccured) { |
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170 *errorOccured = false; |
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171 } |
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172 return tstring(buf.data()); |
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173 } |
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174 |
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175 } // namespace |
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176 |
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177 tstring getEnvVariable(const tstring& name) { |
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178 return getEnvVariableImpl(name); |
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179 } |
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180 |
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181 tstring getEnvVariable(const std::nothrow_t&, const tstring& name, |
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182 const tstring& defValue) { |
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183 bool errorOccured = false; |
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184 const tstring reply = getEnvVariableImpl(name, &errorOccured); |
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185 if (errorOccured) { |
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186 return defValue; |
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187 } |
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188 return reply; |
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189 } |
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190 |
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191 bool isEnvVariableSet(const tstring& name) { |
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192 TCHAR unused[1]; |
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193 SetLastError(ERROR_SUCCESS); |
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194 GetEnvironmentVariable(name.c_str(), unused, _countof(unused)); |
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195 return GetLastError() != ERROR_ENVVAR_NOT_FOUND; |
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196 } |
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197 |
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198 } // end of namespace SysInfo |
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