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annotate Core/SystemToolbox.cpp @ 2161:7219cdce7bba

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 21 Nov 2016 09:19:53 +0100
parents fd5875662670
children 84d1d392a9ab
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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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diff changeset
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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diff changeset
438 {
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diff changeset
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
fd5875662670 creation of namespace SystemToolbox
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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
fd5875662670 creation of namespace SystemToolbox
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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 }