Mercurial > hg > orthanc
annotate Core/SystemToolbox.cpp @ 2161:7219cdce7bba
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 21 Nov 2016 09:19:53 +0100 |
parents | fd5875662670 |
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1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * |
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6 * This program is free software: you can redistribute it and/or |
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7 * modify it under the terms of the GNU General Public License as |
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8 * published by the Free Software Foundation, either version 3 of the |
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9 * License, or (at your option) any later version. |
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10 * |
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11 * In addition, as a special exception, the copyright holders of this |
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12 * program give permission to link the code of its release with the |
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it |
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14 * that use the same license as the "OpenSSL" library), and distribute |
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15 * the linked executables. You must obey the GNU General Public License |
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16 * in all respects for all of the code used other than "OpenSSL". If you |
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17 * modify file(s) with this exception, you may extend this exception to |
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18 * your version of the file(s), but you are not obligated to do so. If |
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19 * you do not wish to do so, delete this exception statement from your |
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20 * version. If you delete this exception statement from all source files |
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21 * in the program, then also delete it here. |
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22 * |
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23 * This program is distributed in the hope that it will be useful, but |
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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26 * General Public License for more details. |
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27 * |
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28 * You should have received a copy of the GNU General Public License |
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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30 **/ |
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31 |
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32 |
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33 #include "PrecompiledHeaders.h" |
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34 #include "SystemToolbox.h" |
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35 |
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36 |
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37 #if BOOST_HAS_DATE_TIME == 1 |
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38 #include <boost/date_time/posix_time/posix_time.hpp> |
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39 #endif |
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40 |
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41 |
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42 #if defined(_WIN32) |
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43 #include <windows.h> |
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44 #include <process.h> // For "_spawnvp()" and "_getpid()" |
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45 #else |
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46 #include <unistd.h> // For "execvp()" |
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47 #include <sys/wait.h> // For "waitpid()" |
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48 #endif |
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49 |
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50 #if defined(__APPLE__) && defined(__MACH__) |
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51 #include <mach-o/dyld.h> /* _NSGetExecutablePath */ |
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52 #include <limits.h> /* PATH_MAX */ |
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53 #endif |
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54 |
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55 #if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) |
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56 #include <limits.h> /* PATH_MAX */ |
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57 #include <signal.h> |
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58 #include <unistd.h> |
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59 #endif |
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60 |
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61 |
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62 #include "Logging.h" |
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63 #include "OrthancException.h" |
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64 #include "Toolbox.h" |
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65 |
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66 #include <boost/filesystem.hpp> |
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67 #include <boost/filesystem/fstream.hpp> |
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68 |
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69 |
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70 namespace Orthanc |
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71 { |
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72 static bool finish_; |
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73 static ServerBarrierEvent barrierEvent_; |
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74 |
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75 #if defined(_WIN32) |
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76 static BOOL WINAPI ConsoleControlHandler(DWORD dwCtrlType) |
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77 { |
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78 // http://msdn.microsoft.com/en-us/library/ms683242(v=vs.85).aspx |
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79 finish_ = true; |
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80 return true; |
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81 } |
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82 #else |
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83 static void SignalHandler(int signal) |
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84 { |
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85 if (signal == SIGHUP) |
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86 { |
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87 barrierEvent_ = ServerBarrierEvent_Reload; |
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88 } |
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89 |
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90 finish_ = true; |
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91 } |
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92 #endif |
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93 |
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94 |
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95 static ServerBarrierEvent ServerBarrierInternal(const bool* stopFlag) |
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96 { |
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97 #if defined(_WIN32) |
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98 SetConsoleCtrlHandler(ConsoleControlHandler, true); |
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99 #else |
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100 signal(SIGINT, SignalHandler); |
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101 signal(SIGQUIT, SignalHandler); |
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102 signal(SIGTERM, SignalHandler); |
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103 signal(SIGHUP, SignalHandler); |
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104 #endif |
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105 |
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106 // Active loop that awakens every 100ms |
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107 finish_ = false; |
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108 barrierEvent_ = ServerBarrierEvent_Stop; |
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109 while (!(*stopFlag || finish_)) |
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110 { |
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111 Toolbox::USleep(100 * 1000); |
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112 } |
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113 |
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114 #if defined(_WIN32) |
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115 SetConsoleCtrlHandler(ConsoleControlHandler, false); |
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116 #else |
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117 signal(SIGINT, NULL); |
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118 signal(SIGQUIT, NULL); |
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119 signal(SIGTERM, NULL); |
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120 signal(SIGHUP, NULL); |
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121 #endif |
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122 |
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123 return barrierEvent_; |
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124 } |
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125 |
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126 |
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127 ServerBarrierEvent SystemToolbox::ServerBarrier(const bool& stopFlag) |
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128 { |
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129 return ServerBarrierInternal(&stopFlag); |
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130 } |
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131 |
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132 |
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133 ServerBarrierEvent SystemToolbox::ServerBarrier() |
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134 { |
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135 const bool stopFlag = false; |
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136 return ServerBarrierInternal(&stopFlag); |
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137 } |
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138 |
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139 |
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140 static std::streamsize GetStreamSize(std::istream& f) |
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141 { |
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142 // http://www.cplusplus.com/reference/iostream/istream/tellg/ |
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143 f.seekg(0, std::ios::end); |
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144 std::streamsize size = f.tellg(); |
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145 f.seekg(0, std::ios::beg); |
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146 |
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147 return size; |
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148 } |
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149 |
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150 |
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151 void SystemToolbox::ReadFile(std::string& content, |
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152 const std::string& path) |
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153 { |
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154 if (!IsRegularFile(path)) |
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155 { |
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156 LOG(ERROR) << std::string("The path does not point to a regular file: ") << path; |
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157 throw OrthancException(ErrorCode_RegularFileExpected); |
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158 } |
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159 |
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160 boost::filesystem::ifstream f; |
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161 f.open(path, std::ifstream::in | std::ifstream::binary); |
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162 if (!f.good()) |
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163 { |
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164 throw OrthancException(ErrorCode_InexistentFile); |
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165 } |
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166 |
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167 std::streamsize size = GetStreamSize(f); |
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168 content.resize(size); |
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169 if (size != 0) |
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170 { |
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171 f.read(reinterpret_cast<char*>(&content[0]), size); |
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172 } |
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173 |
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174 f.close(); |
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175 } |
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176 |
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177 |
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178 bool SystemToolbox::ReadHeader(std::string& header, |
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179 const std::string& path, |
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180 size_t headerSize) |
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181 { |
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182 if (!IsRegularFile(path)) |
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183 { |
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184 LOG(ERROR) << std::string("The path does not point to a regular file: ") << path; |
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185 throw OrthancException(ErrorCode_RegularFileExpected); |
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186 } |
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187 |
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188 boost::filesystem::ifstream f; |
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189 f.open(path, std::ifstream::in | std::ifstream::binary); |
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190 if (!f.good()) |
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191 { |
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192 throw OrthancException(ErrorCode_InexistentFile); |
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193 } |
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194 |
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195 bool full = true; |
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196 |
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197 { |
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198 std::streamsize size = GetStreamSize(f); |
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199 if (size <= 0) |
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200 { |
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201 headerSize = 0; |
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202 full = false; |
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203 } |
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204 else if (static_cast<size_t>(size) < headerSize) |
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205 { |
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206 headerSize = size; // Truncate to the size of the file |
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207 full = false; |
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208 } |
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209 } |
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210 |
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211 header.resize(headerSize); |
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212 if (headerSize != 0) |
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213 { |
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214 f.read(reinterpret_cast<char*>(&header[0]), headerSize); |
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215 } |
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216 |
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217 f.close(); |
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218 |
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219 return full; |
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220 } |
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221 |
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222 |
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223 void SystemToolbox::WriteFile(const void* content, |
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224 size_t size, |
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225 const std::string& path) |
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226 { |
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227 boost::filesystem::ofstream f; |
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228 f.open(path, std::ofstream::out | std::ofstream::binary); |
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229 if (!f.good()) |
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230 { |
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231 throw OrthancException(ErrorCode_CannotWriteFile); |
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232 } |
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233 |
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234 if (size != 0) |
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235 { |
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236 f.write(reinterpret_cast<const char*>(content), size); |
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237 |
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238 if (!f.good()) |
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239 { |
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240 f.close(); |
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241 throw OrthancException(ErrorCode_FileStorageCannotWrite); |
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242 } |
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243 } |
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244 |
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245 f.close(); |
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246 } |
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247 |
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248 |
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249 void SystemToolbox::WriteFile(const std::string& content, |
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250 const std::string& path) |
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251 { |
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252 WriteFile(content.size() > 0 ? content.c_str() : NULL, |
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253 content.size(), path); |
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254 } |
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255 |
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256 |
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257 void SystemToolbox::RemoveFile(const std::string& path) |
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258 { |
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259 if (boost::filesystem::exists(path)) |
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260 { |
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261 if (IsRegularFile(path)) |
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262 { |
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263 boost::filesystem::remove(path); |
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264 } |
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265 else |
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266 { |
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267 throw OrthancException(ErrorCode_RegularFileExpected); |
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268 } |
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269 } |
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270 } |
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271 |
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272 |
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273 uint64_t SystemToolbox::GetFileSize(const std::string& path) |
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274 { |
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275 try |
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276 { |
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277 return static_cast<uint64_t>(boost::filesystem::file_size(path)); |
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278 } |
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279 catch (boost::filesystem::filesystem_error&) |
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280 { |
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281 throw OrthancException(ErrorCode_InexistentFile); |
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282 } |
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283 } |
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284 |
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285 |
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286 void SystemToolbox::MakeDirectory(const std::string& path) |
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287 { |
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288 if (boost::filesystem::exists(path)) |
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289 { |
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290 if (!boost::filesystem::is_directory(path)) |
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291 { |
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292 throw OrthancException(ErrorCode_DirectoryOverFile); |
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293 } |
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294 } |
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295 else |
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296 { |
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297 if (!boost::filesystem::create_directories(path)) |
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298 { |
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299 throw OrthancException(ErrorCode_MakeDirectory); |
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300 } |
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301 } |
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302 } |
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303 |
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304 |
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305 bool SystemToolbox::IsExistingFile(const std::string& path) |
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306 { |
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307 return boost::filesystem::exists(path); |
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308 } |
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309 |
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310 |
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311 #if defined(_WIN32) |
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312 static std::string GetPathToExecutableInternal() |
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313 { |
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314 // Yes, this is ugly, but there is no simple way to get the |
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315 // required buffer size, so we use a big constant |
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316 std::vector<char> buffer(32768); |
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317 /*int bytes =*/ GetModuleFileNameA(NULL, &buffer[0], static_cast<DWORD>(buffer.size() - 1)); |
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318 return std::string(&buffer[0]); |
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319 } |
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320 |
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321 #elif defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) |
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322 static std::string GetPathToExecutableInternal() |
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323 { |
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324 std::vector<char> buffer(PATH_MAX + 1); |
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325 ssize_t bytes = readlink("/proc/self/exe", &buffer[0], buffer.size() - 1); |
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326 if (bytes == 0) |
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327 { |
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328 throw OrthancException(ErrorCode_PathToExecutable); |
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329 } |
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330 |
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331 return std::string(&buffer[0]); |
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332 } |
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333 |
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334 #elif defined(__APPLE__) && defined(__MACH__) |
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335 static std::string GetPathToExecutableInternal() |
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336 { |
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337 char pathbuf[PATH_MAX + 1]; |
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338 unsigned int bufsize = static_cast<int>(sizeof(pathbuf)); |
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339 |
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340 _NSGetExecutablePath( pathbuf, &bufsize); |
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341 |
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342 return std::string(pathbuf); |
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343 } |
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344 |
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345 #else |
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346 #error Support your platform here |
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347 #endif |
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348 |
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349 |
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350 std::string SystemToolbox::GetPathToExecutable() |
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351 { |
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352 boost::filesystem::path p(GetPathToExecutableInternal()); |
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353 return boost::filesystem::absolute(p).string(); |
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354 } |
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355 |
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356 |
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357 std::string SystemToolbox::GetDirectoryOfExecutable() |
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358 { |
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359 boost::filesystem::path p(GetPathToExecutableInternal()); |
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360 return boost::filesystem::absolute(p.parent_path()).string(); |
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361 } |
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362 |
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363 |
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364 void SystemToolbox::ExecuteSystemCommand(const std::string& command, |
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365 const std::vector<std::string>& arguments) |
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366 { |
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367 // Convert the arguments as a C array |
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368 std::vector<char*> args(arguments.size() + 2); |
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369 |
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370 args.front() = const_cast<char*>(command.c_str()); |
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371 |
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372 for (size_t i = 0; i < arguments.size(); i++) |
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373 { |
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374 args[i + 1] = const_cast<char*>(arguments[i].c_str()); |
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375 } |
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376 |
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377 args.back() = NULL; |
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378 |
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379 int status; |
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380 |
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381 #if defined(_WIN32) |
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382 // http://msdn.microsoft.com/en-us/library/275khfab.aspx |
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383 status = static_cast<int>(_spawnvp(_P_OVERLAY, command.c_str(), &args[0])); |
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384 |
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385 #else |
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386 int pid = fork(); |
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387 |
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388 if (pid == -1) |
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389 { |
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390 // Error in fork() |
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391 #if ORTHANC_ENABLE_LOGGING == 1 |
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392 LOG(ERROR) << "Cannot fork a child process"; |
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393 #endif |
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394 |
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395 throw OrthancException(ErrorCode_SystemCommand); |
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396 } |
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397 else if (pid == 0) |
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398 { |
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399 // Execute the system command in the child process |
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400 execvp(command.c_str(), &args[0]); |
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401 |
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402 // We should never get here |
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403 _exit(1); |
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404 } |
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405 else |
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406 { |
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407 // Wait for the system command to exit |
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408 waitpid(pid, &status, 0); |
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409 } |
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410 #endif |
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411 |
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412 if (status != 0) |
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413 { |
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414 #if ORTHANC_ENABLE_LOGGING == 1 |
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415 LOG(ERROR) << "System command failed with status code " << status; |
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416 #endif |
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417 |
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418 throw OrthancException(ErrorCode_SystemCommand); |
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419 } |
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420 } |
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421 |
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422 |
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423 int SystemToolbox::GetProcessId() |
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424 { |
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425 #if defined(_WIN32) |
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426 return static_cast<int>(_getpid()); |
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427 #else |
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428 return static_cast<int>(getpid()); |
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429 #endif |
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430 } |
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431 |
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432 |
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433 bool SystemToolbox::IsRegularFile(const std::string& path) |
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434 { |
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435 namespace fs = boost::filesystem; |
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436 |
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437 try |
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438 { |
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439 if (fs::exists(path)) |
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440 { |
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441 fs::file_status status = fs::status(path); |
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442 return (status.type() == boost::filesystem::regular_file || |
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443 status.type() == boost::filesystem::reparse_file); // Fix BitBucket issue #11 |
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444 } |
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445 } |
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446 catch (fs::filesystem_error&) |
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447 { |
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448 } |
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449 |
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450 return false; |
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451 } |
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452 |
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453 |
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454 FILE* SystemToolbox::OpenFile(const std::string& path, |
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455 FileMode mode) |
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456 { |
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457 #if defined(_WIN32) |
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458 // TODO Deal with special characters by converting to the current locale |
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459 #endif |
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460 |
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461 const char* m; |
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462 switch (mode) |
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463 { |
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464 case FileMode_ReadBinary: |
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465 m = "rb"; |
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466 break; |
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467 |
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468 case FileMode_WriteBinary: |
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469 m = "wb"; |
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470 break; |
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471 |
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472 default: |
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473 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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474 } |
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475 |
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476 return fopen(path.c_str(), m); |
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477 } |
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478 |
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479 |
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480 #if BOOST_HAS_DATE_TIME == 1 |
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481 std::string SystemToolbox::GetNowIsoString() |
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482 { |
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483 boost::posix_time::ptime now = boost::posix_time::second_clock::local_time(); |
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484 return boost::posix_time::to_iso_string(now); |
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485 } |
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486 |
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487 void SystemToolbox::GetNowDicom(std::string& date, |
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488 std::string& time) |
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489 { |
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490 boost::posix_time::ptime now = boost::posix_time::second_clock::local_time(); |
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491 tm tm = boost::posix_time::to_tm(now); |
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492 |
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493 char s[32]; |
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494 sprintf(s, "%04d%02d%02d", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday); |
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495 date.assign(s); |
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496 |
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497 // TODO milliseconds |
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498 sprintf(s, "%02d%02d%02d.%06d", tm.tm_hour, tm.tm_min, tm.tm_sec, 0); |
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499 time.assign(s); |
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500 } |
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501 #endif |
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502 } |