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annotate Core/SystemToolbox.cpp @ 2172:84d1d392a9ab

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GenerateUuid() not available in sandboxed environments
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 23 Nov 2016 12:06:00 +0100
parents fd5875662670
children 1c42860097fc
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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
2172
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62 // Inclusions for UUID
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63 // http://stackoverflow.com/a/1626302
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64
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65 extern "C"
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66 {
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67 #ifdef WIN32
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68 # include <rpc.h>
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69 #else
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70 # include <uuid/uuid.h>
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71 #endif
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72 }
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73
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74
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75 #include "Logging.h"
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76 #include "OrthancException.h"
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77 #include "Toolbox.h"
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78
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79 #include <boost/filesystem.hpp>
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80 #include <boost/filesystem/fstream.hpp>
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81
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82
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83 namespace Orthanc
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84 {
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85 static bool finish_;
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86 static ServerBarrierEvent barrierEvent_;
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87
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88 #if defined(_WIN32)
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89 static BOOL WINAPI ConsoleControlHandler(DWORD dwCtrlType)
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90 {
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91 // http://msdn.microsoft.com/en-us/library/ms683242(v=vs.85).aspx
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92 finish_ = true;
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93 return true;
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94 }
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95 #else
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96 static void SignalHandler(int signal)
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97 {
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98 if (signal == SIGHUP)
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99 {
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100 barrierEvent_ = ServerBarrierEvent_Reload;
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101 }
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102
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103 finish_ = true;
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104 }
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105 #endif
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106
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107
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108 static ServerBarrierEvent ServerBarrierInternal(const bool* stopFlag)
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109 {
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110 #if defined(_WIN32)
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111 SetConsoleCtrlHandler(ConsoleControlHandler, true);
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112 #else
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113 signal(SIGINT, SignalHandler);
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114 signal(SIGQUIT, SignalHandler);
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115 signal(SIGTERM, SignalHandler);
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116 signal(SIGHUP, SignalHandler);
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117 #endif
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118
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119 // Active loop that awakens every 100ms
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120 finish_ = false;
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121 barrierEvent_ = ServerBarrierEvent_Stop;
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122 while (!(*stopFlag || finish_))
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123 {
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124 Toolbox::USleep(100 * 1000);
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125 }
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126
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127 #if defined(_WIN32)
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128 SetConsoleCtrlHandler(ConsoleControlHandler, false);
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129 #else
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130 signal(SIGINT, NULL);
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131 signal(SIGQUIT, NULL);
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132 signal(SIGTERM, NULL);
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133 signal(SIGHUP, NULL);
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134 #endif
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135
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136 return barrierEvent_;
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137 }
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138
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139
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140 ServerBarrierEvent SystemToolbox::ServerBarrier(const bool& stopFlag)
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141 {
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142 return ServerBarrierInternal(&stopFlag);
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143 }
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144
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145
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146 ServerBarrierEvent SystemToolbox::ServerBarrier()
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147 {
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148 const bool stopFlag = false;
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149 return ServerBarrierInternal(&stopFlag);
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150 }
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151
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152
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153 static std::streamsize GetStreamSize(std::istream& f)
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154 {
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155 // http://www.cplusplus.com/reference/iostream/istream/tellg/
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156 f.seekg(0, std::ios::end);
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157 std::streamsize size = f.tellg();
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158 f.seekg(0, std::ios::beg);
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159
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160 return size;
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161 }
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162
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163
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164 void SystemToolbox::ReadFile(std::string& content,
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165 const std::string& path)
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166 {
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167 if (!IsRegularFile(path))
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168 {
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169 LOG(ERROR) << std::string("The path does not point to a regular file: ") << path;
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170 throw OrthancException(ErrorCode_RegularFileExpected);
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171 }
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172
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173 boost::filesystem::ifstream f;
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174 f.open(path, std::ifstream::in | std::ifstream::binary);
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175 if (!f.good())
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176 {
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177 throw OrthancException(ErrorCode_InexistentFile);
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178 }
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179
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180 std::streamsize size = GetStreamSize(f);
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181 content.resize(size);
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182 if (size != 0)
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183 {
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184 f.read(reinterpret_cast<char*>(&content[0]), size);
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185 }
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186
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187 f.close();
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188 }
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189
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190
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191 bool SystemToolbox::ReadHeader(std::string& header,
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192 const std::string& path,
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193 size_t headerSize)
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194 {
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195 if (!IsRegularFile(path))
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196 {
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197 LOG(ERROR) << std::string("The path does not point to a regular file: ") << path;
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198 throw OrthancException(ErrorCode_RegularFileExpected);
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199 }
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200
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201 boost::filesystem::ifstream f;
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202 f.open(path, std::ifstream::in | std::ifstream::binary);
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203 if (!f.good())
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204 {
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205 throw OrthancException(ErrorCode_InexistentFile);
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206 }
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207
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208 bool full = true;
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209
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210 {
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211 std::streamsize size = GetStreamSize(f);
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212 if (size <= 0)
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213 {
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214 headerSize = 0;
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215 full = false;
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216 }
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217 else if (static_cast<size_t>(size) < headerSize)
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218 {
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219 headerSize = size; // Truncate to the size of the file
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220 full = false;
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221 }
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222 }
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223
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224 header.resize(headerSize);
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225 if (headerSize != 0)
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226 {
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227 f.read(reinterpret_cast<char*>(&header[0]), headerSize);
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228 }
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229
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230 f.close();
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231
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232 return full;
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233 }
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234
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235
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236 void SystemToolbox::WriteFile(const void* content,
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237 size_t size,
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238 const std::string& path)
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239 {
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240 boost::filesystem::ofstream f;
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241 f.open(path, std::ofstream::out | std::ofstream::binary);
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242 if (!f.good())
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243 {
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244 throw OrthancException(ErrorCode_CannotWriteFile);
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245 }
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246
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247 if (size != 0)
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248 {
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249 f.write(reinterpret_cast<const char*>(content), size);
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250
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251 if (!f.good())
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252 {
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253 f.close();
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254 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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255 }
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256 }
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257
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258 f.close();
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259 }
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260
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261
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262 void SystemToolbox::WriteFile(const std::string& content,
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263 const std::string& path)
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264 {
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265 WriteFile(content.size() > 0 ? content.c_str() : NULL,
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266 content.size(), path);
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267 }
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268
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269
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270 void SystemToolbox::RemoveFile(const std::string& path)
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271 {
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272 if (boost::filesystem::exists(path))
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273 {
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274 if (IsRegularFile(path))
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275 {
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276 boost::filesystem::remove(path);
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277 }
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278 else
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279 {
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280 throw OrthancException(ErrorCode_RegularFileExpected);
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281 }
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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 uint64_t SystemToolbox::GetFileSize(const std::string& path)
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287 {
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288 try
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289 {
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290 return static_cast<uint64_t>(boost::filesystem::file_size(path));
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291 }
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292 catch (boost::filesystem::filesystem_error&)
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293 {
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294 throw OrthancException(ErrorCode_InexistentFile);
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295 }
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296 }
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297
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298
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299 void SystemToolbox::MakeDirectory(const std::string& path)
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300 {
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301 if (boost::filesystem::exists(path))
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302 {
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303 if (!boost::filesystem::is_directory(path))
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304 {
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305 throw OrthancException(ErrorCode_DirectoryOverFile);
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306 }
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307 }
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308 else
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309 {
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310 if (!boost::filesystem::create_directories(path))
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311 {
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312 throw OrthancException(ErrorCode_MakeDirectory);
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313 }
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314 }
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315 }
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316
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317
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318 bool SystemToolbox::IsExistingFile(const std::string& path)
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319 {
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320 return boost::filesystem::exists(path);
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321 }
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322
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323
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324 #if defined(_WIN32)
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325 static std::string GetPathToExecutableInternal()
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326 {
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327 // Yes, this is ugly, but there is no simple way to get the
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328 // required buffer size, so we use a big constant
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329 std::vector<char> buffer(32768);
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330 /*int bytes =*/ GetModuleFileNameA(NULL, &buffer[0], static_cast<DWORD>(buffer.size() - 1));
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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(__linux__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__)
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335 static std::string GetPathToExecutableInternal()
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336 {
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337 std::vector<char> buffer(PATH_MAX + 1);
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338 ssize_t bytes = readlink("/proc/self/exe", &buffer[0], buffer.size() - 1);
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339 if (bytes == 0)
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340 {
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341 throw OrthancException(ErrorCode_PathToExecutable);
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342 }
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343
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344 return std::string(&buffer[0]);
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345 }
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346
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347 #elif defined(__APPLE__) && defined(__MACH__)
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348 static std::string GetPathToExecutableInternal()
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349 {
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350 char pathbuf[PATH_MAX + 1];
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351 unsigned int bufsize = static_cast<int>(sizeof(pathbuf));
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352
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353 _NSGetExecutablePath( pathbuf, &bufsize);
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354
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355 return std::string(pathbuf);
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356 }
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357
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358 #else
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359 #error Support your platform here
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360 #endif
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361
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362
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363 std::string SystemToolbox::GetPathToExecutable()
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364 {
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365 boost::filesystem::path p(GetPathToExecutableInternal());
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366 return boost::filesystem::absolute(p).string();
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367 }
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368
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369
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370 std::string SystemToolbox::GetDirectoryOfExecutable()
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371 {
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372 boost::filesystem::path p(GetPathToExecutableInternal());
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373 return boost::filesystem::absolute(p.parent_path()).string();
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374 }
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375
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376
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377 void SystemToolbox::ExecuteSystemCommand(const std::string& command,
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378 const std::vector<std::string>& arguments)
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379 {
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380 // Convert the arguments as a C array
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381 std::vector<char*> args(arguments.size() + 2);
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382
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383 args.front() = const_cast<char*>(command.c_str());
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384
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385 for (size_t i = 0; i < arguments.size(); i++)
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386 {
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387 args[i + 1] = const_cast<char*>(arguments[i].c_str());
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388 }
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diff changeset
389
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390 args.back() = NULL;
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391
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392 int status;
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diff changeset
393
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394 #if defined(_WIN32)
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395 // http://msdn.microsoft.com/en-us/library/275khfab.aspx
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396 status = static_cast<int>(_spawnvp(_P_OVERLAY, command.c_str(), &args[0]));
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397
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diff changeset
398 #else
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diff changeset
399 int pid = fork();
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400
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diff changeset
401 if (pid == -1)
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diff changeset
402 {
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diff changeset
403 // Error in fork()
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diff changeset
404 #if ORTHANC_ENABLE_LOGGING == 1
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405 LOG(ERROR) << "Cannot fork a child process";
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diff changeset
406 #endif
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diff changeset
407
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408 throw OrthancException(ErrorCode_SystemCommand);
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409 }
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410 else if (pid == 0)
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411 {
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412 // Execute the system command in the child process
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413 execvp(command.c_str(), &args[0]);
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414
fd5875662670 creation of namespace SystemToolbox
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415 // We should never get here
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416 _exit(1);
fd5875662670 creation of namespace SystemToolbox
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417 }
fd5875662670 creation of namespace SystemToolbox
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diff changeset
418 else
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diff changeset
419 {
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diff changeset
420 // Wait for the system command to exit
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diff changeset
421 waitpid(pid, &status, 0);
fd5875662670 creation of namespace SystemToolbox
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422 }
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diff changeset
423 #endif
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424
fd5875662670 creation of namespace SystemToolbox
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diff changeset
425 if (status != 0)
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426 {
fd5875662670 creation of namespace SystemToolbox
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diff changeset
427 #if ORTHANC_ENABLE_LOGGING == 1
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428 LOG(ERROR) << "System command failed with status code " << status;
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diff changeset
429 #endif
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diff changeset
430
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diff changeset
431 throw OrthancException(ErrorCode_SystemCommand);
fd5875662670 creation of namespace SystemToolbox
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diff changeset
432 }
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433 }
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diff changeset
434
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diff changeset
435
fd5875662670 creation of namespace SystemToolbox
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diff changeset
436 int SystemToolbox::GetProcessId()
fd5875662670 creation of namespace SystemToolbox
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diff changeset
437 {
fd5875662670 creation of namespace SystemToolbox
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diff changeset
438 #if defined(_WIN32)
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diff changeset
439 return static_cast<int>(_getpid());
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diff changeset
440 #else
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diff changeset
441 return static_cast<int>(getpid());
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diff changeset
442 #endif
fd5875662670 creation of namespace SystemToolbox
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443 }
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diff changeset
444
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diff changeset
445
fd5875662670 creation of namespace SystemToolbox
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446 bool SystemToolbox::IsRegularFile(const std::string& path)
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diff changeset
447 {
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diff changeset
448 namespace fs = boost::filesystem;
fd5875662670 creation of namespace SystemToolbox
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449
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450 try
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451 {
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452 if (fs::exists(path))
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453 {
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454 fs::file_status status = fs::status(path);
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455 return (status.type() == boost::filesystem::regular_file ||
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456 status.type() == boost::filesystem::reparse_file); // Fix BitBucket issue #11
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457 }
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458 }
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459 catch (fs::filesystem_error&)
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460 {
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461 }
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462
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463 return false;
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464 }
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465
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466
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467 FILE* SystemToolbox::OpenFile(const std::string& path,
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468 FileMode mode)
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469 {
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470 #if defined(_WIN32)
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471 // TODO Deal with special characters by converting to the current locale
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472 #endif
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473
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474 const char* m;
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475 switch (mode)
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476 {
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477 case FileMode_ReadBinary:
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478 m = "rb";
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479 break;
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480
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481 case FileMode_WriteBinary:
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482 m = "wb";
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483 break;
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484
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485 default:
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486 throw OrthancException(ErrorCode_ParameterOutOfRange);
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487 }
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488
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489 return fopen(path.c_str(), m);
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490 }
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491
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492
2172
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493 std::string SystemToolbox::GenerateUuid()
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494 {
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495 #ifdef WIN32
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496 UUID uuid;
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497 UuidCreate ( &uuid );
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498
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499 unsigned char * str;
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500 UuidToStringA ( &uuid, &str );
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501
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502 std::string s( ( char* ) str );
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503
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504 RpcStringFreeA ( &str );
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505 #else
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506 uuid_t uuid;
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507 uuid_generate_random ( uuid );
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508 char s[37];
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509 uuid_unparse ( uuid, s );
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510 #endif
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511 return s;
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512 }
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513
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514
2143
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515 #if BOOST_HAS_DATE_TIME == 1
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516 std::string SystemToolbox::GetNowIsoString()
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517 {
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518 boost::posix_time::ptime now = boost::posix_time::second_clock::local_time();
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519 return boost::posix_time::to_iso_string(now);
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520 }
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521
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522 void SystemToolbox::GetNowDicom(std::string& date,
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523 std::string& time)
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524 {
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525 boost::posix_time::ptime now = boost::posix_time::second_clock::local_time();
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526 tm tm = boost::posix_time::to_tm(now);
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527
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528 char s[32];
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529 sprintf(s, "%04d%02d%02d", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
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530 date.assign(s);
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531
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532 // TODO milliseconds
fd5875662670 creation of namespace SystemToolbox
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533 sprintf(s, "%02d%02d%02d.%06d", tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
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534 time.assign(s);
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535 }
fd5875662670 creation of namespace SystemToolbox
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diff changeset
536 #endif
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537 }