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annotate Core/SystemToolbox.cpp @ 2419:f51e9e852299
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 06 Oct 2017 17:26:15 +0200 |
parents | 2aff870c2c58 |
children | 878b59270859 |
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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 * Copyright (C) 2017 Osimis, Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU General Public License as |
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9 * published by the Free Software Foundation, either version 3 of the |
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10 * License, or (at your option) any later version. |
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11 * |
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12 * In addition, as a special exception, the copyright holders of this |
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13 * program give permission to link the code of its release with the |
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it |
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15 * that use the same license as the "OpenSSL" library), and distribute |
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16 * the linked executables. You must obey the GNU General Public License |
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17 * in all respects for all of the code used other than "OpenSSL". If you |
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18 * modify file(s) with this exception, you may extend this exception to |
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19 * your version of the file(s), but you are not obligated to do so. If |
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20 * you do not wish to do so, delete this exception statement from your |
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21 * version. If you delete this exception statement from all source files |
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22 * in the program, then also delete it here. |
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23 * |
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24 * This program is distributed in the hope that it will be useful, but |
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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27 * General Public License for more details. |
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28 * |
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29 * You should have received a copy of the GNU General Public License |
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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31 **/ |
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32 |
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33 |
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34 #include "PrecompiledHeaders.h" |
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35 #include "SystemToolbox.h" |
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36 |
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37 |
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38 #if defined(_WIN32) |
2173 | 39 # include <windows.h> |
40 # include <process.h> // For "_spawnvp()" and "_getpid()" | |
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41 #else |
2173 | 42 # include <unistd.h> // For "execvp()" |
43 # include <sys/wait.h> // For "waitpid()" | |
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44 #endif |
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45 |
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47 #if defined(__APPLE__) && defined(__MACH__) |
2173 | 48 # include <mach-o/dyld.h> /* _NSGetExecutablePath */ |
49 # include <limits.h> /* PATH_MAX */ | |
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50 #endif |
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51 |
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53 #if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) |
2173 | 54 # include <limits.h> /* PATH_MAX */ |
55 # include <signal.h> | |
56 # include <unistd.h> | |
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57 #endif |
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58 |
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59 |
2365 | 60 #if defined(__OpenBSD__) |
61 # include <sys/sysctl.h> // For "sysctl", "CTL_KERN" and "KERN_PROC_ARGS" | |
62 #endif | |
63 | |
64 | |
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65 // Inclusions for UUID |
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66 // http://stackoverflow.com/a/1626302 |
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67 |
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68 extern "C" |
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69 { |
2364 | 70 #if defined(_WIN32) |
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71 # include <rpc.h> |
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72 #else |
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73 # include <uuid/uuid.h> |
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74 #endif |
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75 } |
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76 |
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77 |
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78 #include "Logging.h" |
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79 #include "OrthancException.h" |
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80 #include "Toolbox.h" |
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81 |
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82 #include <boost/filesystem.hpp> |
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83 #include <boost/filesystem/fstream.hpp> |
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84 #include <boost/date_time/posix_time/posix_time.hpp> |
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85 |
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86 |
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87 namespace Orthanc |
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88 { |
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89 static bool finish_; |
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90 static ServerBarrierEvent barrierEvent_; |
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91 |
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92 #if defined(_WIN32) |
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93 static BOOL WINAPI ConsoleControlHandler(DWORD dwCtrlType) |
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94 { |
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95 // http://msdn.microsoft.com/en-us/library/ms683242(v=vs.85).aspx |
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96 finish_ = true; |
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97 return true; |
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98 } |
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99 #else |
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100 static void SignalHandler(int signal) |
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101 { |
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102 if (signal == SIGHUP) |
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103 { |
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104 barrierEvent_ = ServerBarrierEvent_Reload; |
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105 } |
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106 |
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107 finish_ = true; |
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108 } |
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109 #endif |
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110 |
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111 |
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112 static ServerBarrierEvent ServerBarrierInternal(const bool* stopFlag) |
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113 { |
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114 #if defined(_WIN32) |
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115 SetConsoleCtrlHandler(ConsoleControlHandler, true); |
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116 #else |
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117 signal(SIGINT, SignalHandler); |
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118 signal(SIGQUIT, SignalHandler); |
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119 signal(SIGTERM, SignalHandler); |
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120 signal(SIGHUP, SignalHandler); |
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121 #endif |
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122 |
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123 // Active loop that awakens every 100ms |
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124 finish_ = false; |
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125 barrierEvent_ = ServerBarrierEvent_Stop; |
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126 while (!(*stopFlag || finish_)) |
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127 { |
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128 SystemToolbox::USleep(100 * 1000); |
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129 } |
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130 |
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131 #if defined(_WIN32) |
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132 SetConsoleCtrlHandler(ConsoleControlHandler, false); |
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133 #else |
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134 signal(SIGINT, NULL); |
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135 signal(SIGQUIT, NULL); |
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136 signal(SIGTERM, NULL); |
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137 signal(SIGHUP, NULL); |
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138 #endif |
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139 |
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140 return barrierEvent_; |
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141 } |
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142 |
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143 |
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144 ServerBarrierEvent SystemToolbox::ServerBarrier(const bool& stopFlag) |
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145 { |
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146 return ServerBarrierInternal(&stopFlag); |
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147 } |
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148 |
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149 |
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150 ServerBarrierEvent SystemToolbox::ServerBarrier() |
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151 { |
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152 const bool stopFlag = false; |
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153 return ServerBarrierInternal(&stopFlag); |
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154 } |
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155 |
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156 |
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157 void SystemToolbox::USleep(uint64_t microSeconds) |
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158 { |
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159 #if defined(_WIN32) |
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160 ::Sleep(static_cast<DWORD>(microSeconds / static_cast<uint64_t>(1000))); |
2364 | 161 #elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__native_client__) |
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162 usleep(microSeconds); |
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163 #else |
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164 #error Support your platform here |
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165 #endif |
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166 } |
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167 |
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168 |
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169 static std::streamsize GetStreamSize(std::istream& f) |
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170 { |
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171 // http://www.cplusplus.com/reference/iostream/istream/tellg/ |
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172 f.seekg(0, std::ios::end); |
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173 std::streamsize size = f.tellg(); |
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174 f.seekg(0, std::ios::beg); |
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175 |
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176 return size; |
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177 } |
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178 |
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179 |
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180 void SystemToolbox::ReadFile(std::string& content, |
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181 const std::string& path) |
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182 { |
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183 if (!IsRegularFile(path)) |
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184 { |
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185 LOG(ERROR) << std::string("The path does not point to a regular file: ") << path; |
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186 throw OrthancException(ErrorCode_RegularFileExpected); |
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187 } |
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188 |
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189 boost::filesystem::ifstream f; |
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190 f.open(path, std::ifstream::in | std::ifstream::binary); |
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191 if (!f.good()) |
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192 { |
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193 throw OrthancException(ErrorCode_InexistentFile); |
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194 } |
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195 |
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196 std::streamsize size = GetStreamSize(f); |
2332 | 197 content.resize(static_cast<size_t>(size)); |
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198 if (size != 0) |
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199 { |
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200 f.read(reinterpret_cast<char*>(&content[0]), size); |
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201 } |
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202 |
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203 f.close(); |
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204 } |
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205 |
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206 |
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207 bool SystemToolbox::ReadHeader(std::string& header, |
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208 const std::string& path, |
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209 size_t headerSize) |
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210 { |
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211 if (!IsRegularFile(path)) |
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212 { |
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213 LOG(ERROR) << std::string("The path does not point to a regular file: ") << path; |
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214 throw OrthancException(ErrorCode_RegularFileExpected); |
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215 } |
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216 |
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217 boost::filesystem::ifstream f; |
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218 f.open(path, std::ifstream::in | std::ifstream::binary); |
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219 if (!f.good()) |
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220 { |
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221 throw OrthancException(ErrorCode_InexistentFile); |
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222 } |
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223 |
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224 bool full = true; |
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225 |
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226 { |
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227 std::streamsize size = GetStreamSize(f); |
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228 if (size <= 0) |
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229 { |
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230 headerSize = 0; |
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231 full = false; |
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232 } |
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233 else if (static_cast<size_t>(size) < headerSize) |
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234 { |
2332 | 235 headerSize = static_cast<size_t>(size); // Truncate to the size of the file |
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236 full = false; |
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237 } |
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238 } |
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239 |
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240 header.resize(headerSize); |
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241 if (headerSize != 0) |
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242 { |
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243 f.read(reinterpret_cast<char*>(&header[0]), headerSize); |
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244 } |
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245 |
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246 f.close(); |
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247 |
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248 return full; |
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249 } |
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250 |
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251 |
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252 void SystemToolbox::WriteFile(const void* content, |
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253 size_t size, |
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254 const std::string& path) |
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255 { |
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256 boost::filesystem::ofstream f; |
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257 f.open(path, std::ofstream::out | std::ofstream::binary); |
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258 if (!f.good()) |
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259 { |
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260 throw OrthancException(ErrorCode_CannotWriteFile); |
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261 } |
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262 |
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263 if (size != 0) |
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264 { |
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265 f.write(reinterpret_cast<const char*>(content), size); |
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266 |
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267 if (!f.good()) |
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268 { |
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269 f.close(); |
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270 throw OrthancException(ErrorCode_FileStorageCannotWrite); |
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271 } |
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272 } |
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273 |
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274 f.close(); |
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275 } |
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276 |
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277 |
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278 void SystemToolbox::WriteFile(const std::string& content, |
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279 const std::string& path) |
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280 { |
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281 WriteFile(content.size() > 0 ? content.c_str() : NULL, |
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282 content.size(), path); |
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283 } |
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284 |
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285 |
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286 void SystemToolbox::RemoveFile(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 (IsRegularFile(path)) |
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291 { |
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292 boost::filesystem::remove(path); |
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293 } |
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294 else |
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295 { |
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296 throw OrthancException(ErrorCode_RegularFileExpected); |
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297 } |
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298 } |
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299 } |
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300 |
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301 |
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302 uint64_t SystemToolbox::GetFileSize(const std::string& path) |
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303 { |
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304 try |
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305 { |
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306 return static_cast<uint64_t>(boost::filesystem::file_size(path)); |
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307 } |
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308 catch (boost::filesystem::filesystem_error&) |
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309 { |
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310 throw OrthancException(ErrorCode_InexistentFile); |
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311 } |
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312 } |
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313 |
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314 |
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315 void SystemToolbox::MakeDirectory(const std::string& path) |
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316 { |
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317 if (boost::filesystem::exists(path)) |
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318 { |
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319 if (!boost::filesystem::is_directory(path)) |
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320 { |
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321 throw OrthancException(ErrorCode_DirectoryOverFile); |
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322 } |
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323 } |
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324 else |
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325 { |
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326 if (!boost::filesystem::create_directories(path)) |
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327 { |
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328 throw OrthancException(ErrorCode_MakeDirectory); |
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329 } |
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330 } |
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331 } |
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332 |
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333 |
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334 bool SystemToolbox::IsExistingFile(const std::string& path) |
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335 { |
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336 return boost::filesystem::exists(path); |
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337 } |
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338 |
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339 |
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340 #if defined(_WIN32) |
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341 static std::string GetPathToExecutableInternal() |
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342 { |
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343 // Yes, this is ugly, but there is no simple way to get the |
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344 // required buffer size, so we use a big constant |
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345 std::vector<char> buffer(32768); |
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346 /*int bytes =*/ GetModuleFileNameA(NULL, &buffer[0], static_cast<DWORD>(buffer.size() - 1)); |
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347 return std::string(&buffer[0]); |
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348 } |
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349 |
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350 #elif defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__FreeBSD__) |
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351 static std::string GetPathToExecutableInternal() |
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352 { |
2365 | 353 // NOTE: For FreeBSD, using KERN_PROC_PATHNAME might be a better alternative |
354 | |
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355 std::vector<char> buffer(PATH_MAX + 1); |
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356 ssize_t bytes = readlink("/proc/self/exe", &buffer[0], buffer.size() - 1); |
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357 if (bytes == 0) |
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358 { |
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359 throw OrthancException(ErrorCode_PathToExecutable); |
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360 } |
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361 |
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362 return std::string(&buffer[0]); |
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363 } |
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364 |
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365 #elif defined(__APPLE__) && defined(__MACH__) |
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366 static std::string GetPathToExecutableInternal() |
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367 { |
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368 char pathbuf[PATH_MAX + 1]; |
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369 unsigned int bufsize = static_cast<int>(sizeof(pathbuf)); |
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370 |
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371 _NSGetExecutablePath( pathbuf, &bufsize); |
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372 |
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373 return std::string(pathbuf); |
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374 } |
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375 |
2364 | 376 #elif defined(__OpenBSD__) |
377 static std::string GetPathToExecutableInternal() | |
378 { | |
2365 | 379 // This is an adapted version of the patch proposed in issue #64 |
380 // without an explicit call to "malloc()" to prevent memory leak | |
381 // https://bitbucket.org/sjodogne/orthanc/issues/64/add-openbsd-support | |
382 // https://stackoverflow.com/q/31494901/881731 | |
383 | |
384 const int mib[4] = { CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV }; | |
385 | |
386 size_t len; | |
387 if (sysctl(mib, 4, NULL, &len, NULL, 0) == -1) | |
388 { | |
389 throw OrthancException(ErrorCode_PathToExecutable); | |
390 } | |
391 | |
392 std::string tmp; | |
393 tmp.resize(len); | |
394 | |
395 char** buffer = reinterpret_cast<char**>(&tmp[0]); | |
396 | |
397 if (sysctl(mib, 4, buffer, &len, NULL, 0) == -1) | |
398 { | |
399 throw OrthancException(ErrorCode_PathToExecutable); | |
400 } | |
401 else | |
402 { | |
403 return std::string(buffer[0]); | |
404 } | |
2364 | 405 } |
406 | |
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407 #else |
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408 #error Support your platform here |
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409 #endif |
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410 |
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411 |
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412 std::string SystemToolbox::GetPathToExecutable() |
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413 { |
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414 boost::filesystem::path p(GetPathToExecutableInternal()); |
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415 return boost::filesystem::absolute(p).string(); |
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416 } |
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417 |
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418 |
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419 std::string SystemToolbox::GetDirectoryOfExecutable() |
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420 { |
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421 boost::filesystem::path p(GetPathToExecutableInternal()); |
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422 return boost::filesystem::absolute(p.parent_path()).string(); |
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423 } |
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424 |
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425 |
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426 void SystemToolbox::ExecuteSystemCommand(const std::string& command, |
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427 const std::vector<std::string>& arguments) |
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428 { |
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429 // Convert the arguments as a C array |
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430 std::vector<char*> args(arguments.size() + 2); |
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431 |
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432 args.front() = const_cast<char*>(command.c_str()); |
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433 |
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434 for (size_t i = 0; i < arguments.size(); i++) |
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435 { |
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436 args[i + 1] = const_cast<char*>(arguments[i].c_str()); |
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437 } |
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438 |
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439 args.back() = NULL; |
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440 |
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441 int status; |
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442 |
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443 #if defined(_WIN32) |
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444 // http://msdn.microsoft.com/en-us/library/275khfab.aspx |
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445 status = static_cast<int>(_spawnvp(_P_OVERLAY, command.c_str(), &args[0])); |
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446 |
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447 #else |
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448 int pid = fork(); |
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449 |
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450 if (pid == -1) |
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451 { |
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452 // Error in fork() |
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453 #if ORTHANC_ENABLE_LOGGING == 1 |
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454 LOG(ERROR) << "Cannot fork a child process"; |
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455 #endif |
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456 |
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457 throw OrthancException(ErrorCode_SystemCommand); |
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458 } |
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459 else if (pid == 0) |
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460 { |
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461 // Execute the system command in the child process |
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462 execvp(command.c_str(), &args[0]); |
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463 |
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464 // We should never get here |
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465 _exit(1); |
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466 } |
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467 else |
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468 { |
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469 // Wait for the system command to exit |
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470 waitpid(pid, &status, 0); |
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471 } |
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472 #endif |
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473 |
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474 if (status != 0) |
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475 { |
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476 #if ORTHANC_ENABLE_LOGGING == 1 |
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477 LOG(ERROR) << "System command failed with status code " << status; |
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478 #endif |
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479 |
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480 throw OrthancException(ErrorCode_SystemCommand); |
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481 } |
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482 } |
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483 |
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484 |
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485 int SystemToolbox::GetProcessId() |
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486 { |
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487 #if defined(_WIN32) |
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488 return static_cast<int>(_getpid()); |
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489 #else |
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490 return static_cast<int>(getpid()); |
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491 #endif |
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492 } |
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493 |
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494 |
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495 bool SystemToolbox::IsRegularFile(const std::string& path) |
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496 { |
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497 namespace fs = boost::filesystem; |
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498 |
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499 try |
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500 { |
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501 if (fs::exists(path)) |
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502 { |
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503 fs::file_status status = fs::status(path); |
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504 return (status.type() == boost::filesystem::regular_file || |
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505 status.type() == boost::filesystem::reparse_file); // Fix BitBucket issue #11 |
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506 } |
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507 } |
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508 catch (fs::filesystem_error&) |
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509 { |
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510 } |
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511 |
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512 return false; |
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513 } |
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514 |
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515 |
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516 FILE* SystemToolbox::OpenFile(const std::string& path, |
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517 FileMode mode) |
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518 { |
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519 #if defined(_WIN32) |
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520 // TODO Deal with special characters by converting to the current locale |
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521 #endif |
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522 |
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523 const char* m; |
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524 switch (mode) |
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525 { |
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526 case FileMode_ReadBinary: |
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527 m = "rb"; |
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528 break; |
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529 |
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530 case FileMode_WriteBinary: |
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531 m = "wb"; |
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532 break; |
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533 |
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534 default: |
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535 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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536 } |
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537 |
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538 return fopen(path.c_str(), m); |
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539 } |
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540 |
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541 |
2172
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542 std::string SystemToolbox::GenerateUuid() |
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543 { |
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544 #ifdef WIN32 |
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545 UUID uuid; |
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546 UuidCreate ( &uuid ); |
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547 |
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548 unsigned char * str; |
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549 UuidToStringA ( &uuid, &str ); |
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550 |
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551 std::string s( ( char* ) str ); |
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552 |
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553 RpcStringFreeA ( &str ); |
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554 #else |
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555 uuid_t uuid; |
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556 uuid_generate_random ( uuid ); |
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557 char s[37]; |
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558 uuid_unparse ( uuid, s ); |
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559 #endif |
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560 return s; |
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561 } |
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562 |
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563 |
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564 std::string SystemToolbox::GetNowIsoString() |
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565 { |
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566 boost::posix_time::ptime now = boost::posix_time::second_clock::local_time(); |
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567 return boost::posix_time::to_iso_string(now); |
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568 } |
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569 |
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570 |
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571 void SystemToolbox::GetNowDicom(std::string& date, |
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572 std::string& time) |
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573 { |
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574 boost::posix_time::ptime now = boost::posix_time::second_clock::local_time(); |
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575 tm tm = boost::posix_time::to_tm(now); |
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576 |
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577 char s[32]; |
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578 sprintf(s, "%04d%02d%02d", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday); |
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579 date.assign(s); |
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580 |
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581 // TODO milliseconds |
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582 sprintf(s, "%02d%02d%02d.%06d", tm.tm_hour, tm.tm_min, tm.tm_sec, 0); |
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583 time.assign(s); |
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584 } |
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585 } |