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Posted to commits@mesos.apache.org by gi...@apache.org on 2018/05/21 18:45:39 UTC
[2/3] mesos-site git commit: Updated the website built from mesos
SHA: 0426333.
http://git-wip-us.apache.org/repos/asf/mesos-site/blob/3842635e/content/api/latest/c++/windows_2shell_8hpp_source.html
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<div class="title">shell.hpp</div> </div>
</div><!--header-->
<div class="contents">
-<a href="windows_2shell_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// You may obtain a copy of the License at</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">/
/</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// limitations under the License.</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div cla
ss="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef __STOUT_OS_WINDOWS_SHELL_HPP__</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define __STOUT_OS_WINDOWS_SHELL_HPP__</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <process.h></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <stdarg.h></span> <span class="comment">// For va_list, va_start, etc.</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00020"
></a><span class="lineno"> 20</span> <span class="preprocessor">#include <array></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <map></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <<a class="code" href="error_8hpp.html">stout/error.hpp</a>></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <<a class="code" href="foreach_8hpp.html">stout/foreach.hpp</a>></span></d
iv><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <<a class="code" href="none_8hpp.html">stout/none.hpp</a>></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <<a class="code" href="option_8hpp.html">stout/option.hpp</a>></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="os_8hpp.html">stout/os.hpp</a>></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="try_8hpp.html">stout/try.hpp</a>></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html">stout/windows.hpp</a>></span></div><d
iv class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="code" href="int__fd_8hpp.html">stout/os/int_fd.hpp</a>></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <<a class="code" href="inherit_8hpp.html">stout/internal/windows/inherit.hpp</a>></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">namespace </span><a class="code" href="namespaceinternal.html">internal</a> {</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">namespace </span>windows {</div><div class="line"><
a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">// Retrieves system environment in a `std::map`, ignoring</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// the current process's environment variables.</span></div><div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="namespaceinternal_1_1windows.html#a8fc9ccf78565ac55f90070486d385227"> 42</a></span> <span class="keyword">inline</span> <a class="code" href="classOption.html">Option<std::map<std::wstring, std::wstring></a>> <a class="code" href="namespaceinternal_1_1windows.html#a8fc9ccf78565ac55f90070486d385227">get_system_env</a>()</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> {</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  std::m
ap<std::wstring, std::wstring> system_env;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordtype">wchar_t</span>* env_entry = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// Get the system environment.</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">// The third parameter (bool) tells the function *not* to inherit</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="comment">// variables from the current process.</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">if</span> (!::CreateEnvironmentBlock((LPVOID*)&env_entry, <span class="keyword">nullptr</span>
, FALSE)) {</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  }</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// Save the environment block in order to destroy it later.</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordtype">wchar_t</span>* env_block = env_entry;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">while</span> (*env_entry != L<span class="charliteral">'\0'</span>) {</div><div class="line"><a name="l00058"
></a><span class="lineno"> 58</span>  <span class="comment">// Each environment block contains the environment variables as follows:</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="comment">// Var1=Value1\0</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// Var2=Value2\0</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// Var3=Value3\0</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// ...</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// VarN=ValueN\0\0</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// The name of an environment variable cannot include an equal sign (=).</span></
div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">// Construct a string from the pointer up to the first '\0',</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// e.g. "Var1=Value1\0", then split into name and value.</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  std::wstring entry(env_entry);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  std::wstring::size_type separator = entry.find(L<span class="stringliteral">"="</span>);</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  std::wstring var_name(entry.substr(0, separator));</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  std::wstring varV
al(entry.substr(separator + 1));</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">// Mesos variables are upper case. Convert system variables to</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">// match the name provided by the scheduler in case of a collision.</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">// This is safe because Windows environment variables are case insensitive.</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="namespacemesos_1_1internal_1_1recordio.html#a5fcab68176c462aaeed909f304c91bdf">std::transform</a>(</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  var_name.begin(), var_name
.end(), var_name.begin(), ::towupper);</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="comment">// The system environment has priority.</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  system_env.insert_or_assign(var_name.data(), varVal.data());</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// Advance the pointer the length of the entry string plus the '\0'.</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  env_entry += entry.length() + 1;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  }</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </d
iv><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  ::DestroyEnvironmentBlock(env_block);</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span> system_env;</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> }</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">// Creates a null-terminated array of null-terminated strings that will be</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment">// passed to `CreateProcessW` as the `lpEnvironment` argument, as described by</span></div><div class="line"><
a name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// MSDN[1]. This array needs to be sorted in alphabetical order, but the `map`</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">// already takes care of that. Note that this function explicitly handles</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">// UTF-16 environments, so it must be used in conjunction with the</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">// `CREATE_UNICODE_ENVIRONMENT` flag.</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">//</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">// NOTE: This function will add the system's environment variables into</span></div><div cl
ass="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">// the returned string. These variables take precedence over the provided</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// `env` and are generally necessary in order to launch things on Windows.</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">//</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">// [1] https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425(v=vs.85).aspx</span></div><div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="namespaceinternal_1_1windows.html#a7b6974b9ba88dd5d9658c40268147581"> 104</a></span> <span class="keyword">inline</span> <a class="code" href="classOption.html">Option<std::wstring></a> <a class="code" href="namespaceintern
al_1_1windows.html#a7b6974b9ba88dd5d9658c40268147581">create_process_env</a>(</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">const</span> <a class="code" href="classOption.html">Option</a><std::map<std::string, std::string>>& env)</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span> (env.isNone() || (env.isSome() && env.get().size() == 0)) {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00111"></a><span class="lineno">
111</span>  <a class="code" href="classOption.html">Option<std::map<std::wstring, std::wstring></a>> system_env = <a class="code" href="namespaceinternal_1_1windows.html#a8fc9ccf78565ac55f90070486d385227">get_system_env</a>();</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="comment">// The system environment must be non-empty.</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="comment">// No subprocesses will be able to launch if the system environment is blank.</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  CHECK(system_env.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() && system_env.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>().size() > 0);</div
><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  std::map<std::wstring, std::wstring> combined_env;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="comment">// Populate the combined environment first with the system environment.</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <a class="code" href="foreach_8hpp.html#a66900b166526abe66464d6597536b111">foreachpair</a> (<span class="keyword">const</span> std::wstring& key,</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">const</span> std::wstring& value,</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  system_env.<a
class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>()) {</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  combined_env[key] = value;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="comment">// Now override with the supplied environment.</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <a class="code" href="foreach_8hpp.html#a66900b166526abe66464d6597536b111">foreachpair</a> (<span class="keyword">const</span> std::string& key,</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">const</span> std::string& value,</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span
>  env.get()) {</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  combined_env[wide_stringify(key)] = wide_stringify(value);</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  }</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  std::wstring env_string;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="foreach_8hpp.html#a66900b166526abe66464d6597536b111">foreachpair</a> (<span class="keyword">const</span> std::wstring& key,</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">const</span> std::wstring& value,</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  combined_env) {</div><div class="line"><a na
me="l00137"></a><span class="lineno"> 137</span>  env_string += key + L<span class="charliteral">'='</span> + value + L<span class="charliteral">'\0'</span>;</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="comment">// Append final null terminating character.</span></div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  env_string.push_back(L<span class="charliteral">'\0'</span>);</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">return</span> env_string;</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> }</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><
a name="l00145"></a><span class="lineno"> 145</span> </div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment">// Concatenates multiple command-line arguments and escapes the values.</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment">// NOTE: This is necessary even when using Windows APIs that "appear"</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment">// to take arguments as a list, because those APIs will themselves</span></div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment">// concatenate command-line arguments *without* escaping them.</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment">//</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span cla
ss="comment">// This function escapes arguments with the following rules:</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment">// 1) Any argument with a space, tab, newline, vertical tab,</span></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment">// or double-quote must be surrounded in double-quotes.</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment">// 2) Backslashes at the very end of an argument must be escaped.</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment">// 3) Backslashes that precede a double-quote must be escaped.</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment">// The double-quote must also be escaped.</span></div><div class="line"><a name="l00157"></a><span cl
ass="lineno"> 157</span> <span class="comment">//</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment">// NOTE: The below algorithm is adapted from Daniel Colascione's public domain</span></div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment">// algorithm for quoting command line arguments on Windows for `CreateProcess`.</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">//</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment">// https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment">// NOLINT(whitespace/line_length)</span></div><div class="line"><a name="l00163"></a>
<span class="lineno"><a class="line" href="namespaceinternal_1_1windows.html#a80d683d0925b1bfbff4bea3a5aa2e9b9"> 163</a></span> <span class="keyword">inline</span> std::wstring <a class="code" href="namespaceinternal_1_1windows.html#a80d683d0925b1bfbff4bea3a5aa2e9b9">stringify_args</a>(<span class="keyword">const</span> std::vector<std::string>& argv)</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span> {</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  std::wstring command;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> argit = argv.cbegin(); argit != argv.cend(); ++argit) {</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  std::wstring arg = wide_stringify(*argit);</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span
class="comment">// Don't quote empty arguments or those without troublesome characters.</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">if</span> (!arg.empty() && arg.find_first_of(L<span class="stringliteral">" \t\n\v\""</span>) == arg.npos) {</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  command.append(arg);</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="comment">// Beginning double quotation mark.</span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  command.push_back(L<span class="charliteral">'"'</span>);</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span clas
s="keywordflow">for</span> (<span class="keyword">auto</span> it = arg.cbegin(); it != arg.cend(); ++it) {</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="comment">// Count existent backslashes in argument.</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> backslashes = 0;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">while</span> (it != arg.cend() && *it == L<span class="charliteral">'\\'</span>) {</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  ++it;</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  ++backslashes;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  }</div><div class="line"><
a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">if</span> (it == arg.cend()) {</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">// Escape all backslashes, but let the terminating double quotation</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="comment">// mark we add below be interpreted as a metacharacter.</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  command.append(backslashes * 2, L<span class="charliteral">'\\'</span>);</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  } <span class="keywordf
low">else</span> <span class="keywordflow">if</span> (*it == L<span class="charliteral">'"'</span>) {</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="comment">// Escape all backslashes and the following double quotation mark.</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  command.append(backslashes * 2 + 1, L<span class="charliteral">'\\'</span>);</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  command.push_back(*it);</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="comment">// Backslashes aren't special here.</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  command.ap
pend(backslashes, L<span class="charliteral">'\\'</span>);</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  command.push_back(*it);</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  }</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="comment">// Terminating double quotation mark.</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  command.push_back(L<span class="charliteral">'"'</span>);</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  }</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="comment">// Space separate arguments (bu
t don't append at end).</span></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">if</span> (argit != argv.cend() - 1) {</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  command.push_back(L<span class="charliteral">' '</span>);</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="comment">// Append final null terminating character.</span></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  command.push_back(L<span class="charliteral">'\0'</span>);</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">return</span> command;</div><div class="line"><a name="l00
209"></a><span class="lineno"> 209</span> }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> </div><div class="line"><a name="l00212"></a><span class="lineno"><a class="line" href="structinternal_1_1windows_1_1ProcessData.html"> 212</a></span> <span class="keyword">struct </span><a class="code" href="structinternal_1_1windows_1_1ProcessData.html">ProcessData</a> {</div><div class="line"><a name="l00213"></a><span class="lineno"><a class="line" href="structinternal_1_1windows_1_1ProcessData.html#a96c76121644bd430e9ca67cf57636c0d"> 213</a></span>  <a class="code" href="classSharedHandle.html">SharedHandle</a> <a class="code" href="structinternal_1_1windows_1_1ProcessData.html#a96c76121644bd430e9ca67cf57636c0d">process_handle</a>;</div><div class="line"><a name="l00214"></a><span class="lineno"><a class="line" href="structinternal_1_1windows_1_1Proces
sData.html#a7160cf48fc6e70d9390233b246b93bee"> 214</a></span>  <a class="code" href="classSharedHandle.html">SharedHandle</a> <a class="code" href="structinternal_1_1windows_1_1ProcessData.html#a7160cf48fc6e70d9390233b246b93bee">thread_handle</a>;</div><div class="line"><a name="l00215"></a><span class="lineno"><a class="line" href="structinternal_1_1windows_1_1ProcessData.html#a65a4a4aba5450087363bfffdb30eea25"> 215</a></span>  <a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a> <a class="code" href="structinternal_1_1windows_1_1ProcessData.html#a65a4a4aba5450087363bfffdb30eea25">pid</a>;</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> };</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div><div class="line"><a name="l00219"></a><span class="lineno">
219</span> <span class="comment">// Provides an interface for creating a child process on Windows.</span></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment">//</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment">// The `command` argument is given for compatibility, and is ignored. This is</span></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment">// because the `CreateProcess` will use `argv[0]` as the command to be executed,</span></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment">// and will perform a `PATH` lookup. If `command` were to be used instead,</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment">// `CreateProcess` would require an absolute path.</span></div><div class="line"><a name="l0022
5"></a><span class="lineno"> 225</span> <span class="comment">//</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment">// If `create_suspended` is `true`, the process will not be started, and the</span></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment">// caller must use `ResumeThread` to start the process.</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment">//</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment">// The caller can specify explicit `stdin`, `stdout`, and `stderr` handles,</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment">// in that order, for the process via the `pipes` argument.</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <spa
n class="comment">//</span></div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment">// NOTE: If `pipes` are specified, they will be temporarily set to</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment">// inheritable, and then set to uninheritable. This is a side effect</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment">// on each `HANDLE`.</span></div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment">//</span></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment">// The return value is a `ProcessData` struct, with the process and thread</span></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment">// handles each saved in a `SharedHandle`, ensuring they are closed w
hen struct</span></div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment">// goes out of scope.</span></div><div class="line"><a name="l00239"></a><span class="lineno"><a class="line" href="namespaceinternal_1_1windows.html#aaaa193083fd4f24a2e92e57ee8a8319f"> 239</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<ProcessData></a> <a class="code" href="namespaceinternal_1_1windows.html#aaaa193083fd4f24a2e92e57ee8a8319f">create_process</a>(</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keyword">const</span> std::string& command,</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keyword">const</span> std::vector<std::string>& argv,</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keyword">const</span> <a class="code" href="
classOption.html">Option</a><std::map<std::string, std::string>>& <a class="code" href="namespacemesos_1_1internal_1_1tests.html#a1396c5e3b0a179220de2792d74770ec2">environment</a>,</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> create_suspended = <span class="keyword">false</span>,</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keyword">const</span> <a class="code" href="classOption.html">Option</a><std::array<int_fd, 3>>& pipes = <a class="code" href="structNone.html">None</a>())</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> {</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="comment">// TODO(andschwa): Assert that `command` and `argv[0]` are the same.</span></div><div class="line"><a name="l00247"></a><
span class="lineno"> 247</span>  <span class="keyword">const</span> std::wstring arg_string = <a class="code" href="namespaceinternal_1_1windows.html#a80d683d0925b1bfbff4bea3a5aa2e9b9">stringify_args</a>(argv);</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  std::vector<wchar_t> arg_buffer(arg_string.begin(), arg_string.end());</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  arg_buffer.push_back(L<span class="charliteral">'\0'</span>);</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="comment">// Create the process with a Unicode environment.</span></div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  DWORD creation_flags = CREATE_UNICODE_ENVIRONMENT;</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&
#160; <span class="keywordflow">if</span> (create_suspended) {</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  creation_flags |= CREATE_SUSPENDED;</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  }</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="comment">// Construct the environment that will be passed to `::CreateProcessW`.</span></div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keyword">const</span> <a class="code" href="classOption.html">Option<std::wstring></a> env_string = <a class="code" href="namespaceinternal_1_1windows.html#a7b6974b9ba88dd5d9658c40268147581">create_process_env</a>(<a class="code" href="namespacemesos_1_1internal_1_1tests.html#a1396c5e3b0a179220de2792d74770ec2">environment</a>);</div><div class="li
ne"><a name="l00259"></a><span class="lineno"> 259</span>  std::vector<wchar_t> env_buffer;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">if</span> (env_string.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>()) {</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="comment">// This string contains the necessary null characters.</span></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  env_buffer.assign(env_string.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>().begin(), env_string.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>().end());</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  }</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div><div class
="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordtype">wchar_t</span>* process_env = env_buffer.empty() ? <span class="keyword">nullptr</span> : env_buffer.data();</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> </div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  PROCESS_INFORMATION process_info = {};</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> </div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  STARTUPINFOW startup_info = {};</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  startup_info.cb = <span class="keyword">sizeof</span>(STARTUPINFOW);</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="comment">// Hook up the stdin/out/err pipes and
use the `STARTF_USESTDHANDLES`</span></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="comment">// flag to instruct the child to use them [1].</span></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="comment">// A more user-friendly example can be found in [2].</span></div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="comment">//</span></div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="comment">// [1] https://msdn.microsoft.com/en-us/library/windows/desktop/ms686331(v=vs.85).aspx</span></div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="comment">// [2] https://msdn.microsoft.com/en-us/library/windows/desktop/ms682499(v=vs.85).aspx</span></div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordflow">
if</span> (pipes.isSome()) {</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">// Each of these handles must be inheritable.</span></div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">foreach</span> (<span class="keyword">const</span> <a class="code" href="int__fd_8hpp.html#aea4dbda01c90455f158ffa9b924c2f07">int_fd</a>& fd, pipes.get()) {</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keyword">const</span> <a class="code" href="classTry.html">Try<Nothing></a> inherit = <a class="code" href="namespaceinternal_1_1windows.html#a9dc48dc50b21cb8cee5237630460c4bd">set_inherit</a>(fd, <span class="keyword">true</span>);</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">if</span> (inherit.<a class="code" href="classTry.html#a0b98f95163b8a38daafd
1651b043a276">isError</a>()) {</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(inherit.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  }</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  }</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> </div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  startup_info.dwFlags |= STARTF_USESTDHANDLES;</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  startup_info.hStdInput = std::get<0>(pipes.get());</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  startup_info.hStdOutput = std::get<1>(pipes.get());</div><d
iv class="line"><a name="l00290"></a><span class="lineno"> 290</span>  startup_info.hStdError = std::get<2>(pipes.get());</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  }</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span> </div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keyword">const</span> BOOL result = ::CreateProcessW(</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="comment">// This is replaced by the first token of `arg_buffer` string.</span></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  static_cast<LPCWSTR>(<span class="keyword">nullptr</span>),</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  static_cast<LPWSTR>(arg_buffer.data()),</div><div class="line"><a name="l00297"></a><span class="lineno">
297</span>  static_cast<LPSECURITY_ATTRIBUTES>(<span class="keyword">nullptr</span>),</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keyword">static_cast<</span>LPSECURITY_ATTRIBUTES<span class="keyword">></span>(<span class="keyword">nullptr</span>),</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  TRUE, <span class="comment">// Inherit parent process handles (such as those in `pipes`).</span></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  creation_flags,</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  static_cast<LPVOID>(process_env),</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keyword">static_cast<</span>LPCWSTR<span class="keyword">></span>(<span class="keyword">nullptr</span>), <span class="comment">// Inherit w
orking directory.</span></div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  &startup_info,</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  &process_info);</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> </div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="comment">// NOTE: The MSDN documentation for `CreateProcess` states that it</span></div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">// returns before the process has "finished initialization," but is</span></div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="comment">// not clear on precisely what initialization entails. It would seem</span></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="comment">// that
this does not affect inherited handles, as it stands to</span></div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="comment">// reason that the system call to `CreateProcess` causes inheritable</span></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="comment">// handles to become inherited, and not some "initialization" of the</span></div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="comment">// child process. However, if an inheritance race condition</span></div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="comment">// manifests, this assumption should be re-evaluated.</span></div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span> </div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">if</span> (pipes.isSo
me()) {</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="comment">// These handles should no longer be inheritable. This prevents other child</span></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="comment">// processes from accidentally inheriting the wrong handles.</span></div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="comment">//</span></div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="comment">// NOTE: This is explicit, and does not take into account the</span></div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="comment">// previous inheritance semantics of each `HANDLE`. It is assumed</span></div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="comment">// that users of this function s
end non-inheritable handles.</span></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">foreach</span> (<span class="keyword">const</span> <a class="code" href="int__fd_8hpp.html#aea4dbda01c90455f158ffa9b924c2f07">int_fd</a>& fd, pipes.get()) {</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="keyword">const</span> <a class="code" href="classTry.html">Try<Nothing></a> inherit = <a class="code" href="namespaceinternal_1_1windows.html#a9dc48dc50b21cb8cee5237630460c4bd">set_inherit</a>(fd, <span class="keyword">false</span>);</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">if</span> (inherit.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">return
</span> <a class="code" href="classError.html">Error</a>(inherit.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  }</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  }</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  }</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">if</span> (result == FALSE) {</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">return</span> <a class="code" href="classWindowsError.html">WindowsError</a>(</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="stringliteral">"Failed to call `CreateProcess`: "<
/span> + <a class="code" href="namespacens.html#a28116b46e6543597a11733424cd1aa20">stringify</a>(arg_string));</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  }</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">return</span> <a class="code" href="structinternal_1_1windows_1_1ProcessData.html">ProcessData</a>{<a class="code" href="classSharedHandle.html">SharedHandle</a>{process_info.hProcess, ::CloseHandle},</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <a class="code" href="classSharedHandle.html">SharedHandle</a>{process_info.hThread, ::CloseHandle},</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="keyword">static_cast<</span><a class="code" href="3rdparty_2stout_2include_2st
out_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a><span class="keyword">></span>(process_info.dwProcessId)};</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span> }</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span> </div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span> } <span class="comment">// namespace windows {</span></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> } <span class="comment">// namespace internal {</span></div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> </div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="keyword">namespace </span><a class="code" href="namespaceos.html">os</a> {</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="keyword">namespace </span>Shell {</div><div class="line"><a name="l00345"
></a><span class="lineno"> 345</span> </div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="comment">// Canonical constants used as platform-dependent args to `exec` calls.</span></div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="comment">// `name` is the command name, `arg0` is the first argument received</span></div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment">// by the callee, usually the command name and `arg1` is the second</span></div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment">// command argument received by the callee.</span></div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> constexpr <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="namespaceos_1_1Shell.html#acfe16ef2b1146ad49a8651c0a457ce46">n
ame</a> = <span class="stringliteral">"cmd.exe"</span>;</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span> constexpr <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="namespaceos_1_1Shell.html#adeacb41dacfa03ad5ceebd9a53582997">arg0</a> = <span class="stringliteral">"cmd.exe"</span>;</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> constexpr <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="namespaceos_1_1Shell.html#a44f50f66f2a231de974b53c9f4384ba5">arg1</a> = <span class="stringliteral">"/c"</span>;</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> </div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span> } <span class="comment">// namespace Shell {</span></div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> 
</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="keyword">template</span> <<span class="keyword">typename</span>... T></div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <a class="code" href="classTry.html">Try<std::string></a> <a class="code" href="namespaceos.html#a0d86320d7799ea761599bc356c02a4fa">shell</a>(<span class="keyword">const</span> std::string& fmt, <span class="keyword">const</span> T&... t) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="keyword">template</span><<span class="keyword">typename</span>... T></div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="keyword">inlin
e</span> <span class="keywordtype">int</span> <a class="code" href="namespaceos.html#a4b727e301623549c37cdfcd8c553a2c7">execlp</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="namespacemesos_1_1uri.html#a0a3b30c1eb427c4053aaef120b1f453c">file</a>, T... t) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span> </div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> </div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment">// Executes a command by calling "<command> <arguments...>", and</span></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment">// returns after the command has been completed. Returns the process exit</span></div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="co
mment">// code on success and `None` on error.</span></div><div class="line"><a name="l00367"></a><span class="lineno"><a class="line" href="namespaceos.html#abedec07e6e468b54920d3b921a49eb36"> 367</a></span> <span class="keyword">inline</span> <a class="code" href="classOption.html">Option<int></a> <a class="code" href="namespaceos.html#abedec07e6e468b54920d3b921a49eb36">spawn</a>(</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keyword">const</span> std::string& command,</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keyword">const</span> std::vector<std::string>& arguments,</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keyword">const</span> <a class="code" href="classOption.html">Option</a><std::map<std::string, std::string>>& <a class="code" href="namespacemesos_1_1internal_1_1test
s.html#a1396c5e3b0a179220de2792d74770ec2">environment</a> = <a class="code" href="structNone.html">None</a>())</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span> {</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <a class="code" href="classTry.html">Try<::internal::windows::ProcessData></a> process_data =</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <a class="code" href="namespaceinternal_1_1windows.html#aaaa193083fd4f24a2e92e57ee8a8319f">::internal::windows::create_process</a>(command, arguments, <a class="code" href="namespacemesos_1_1internal_1_1tests.html#a1396c5e3b0a179220de2792d74770ec2">environment</a>);</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span> </div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keywordflow">if</span> (process_data.<a class="code" href="classTry.html#a0b98f9
5163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  LOG(WARNING) << process_data.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>();</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  }</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span> </div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="comment">// Wait for the process synchronously.</span></div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  ::WaitForSingleObject(</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  process_data-><a class="code" href="structin
ternal_1_1windows_1_1ProcessData.html#a96c76121644bd430e9ca67cf57636c0d">process_handle</a>.<a class="code" href="classSharedHandle.html#a800385e17e17cb826147968e748fd8fa">get_handle</a>(), INFINITE);</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  DWORD <a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4">status</a>;</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">if</span> (!::GetExitCodeProcess(</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  process_data-><a class="code" href="structinternal_1_1windows_1_1ProcessData.html#a96c76121644bd430e9ca67cf57636c0d">process_handle</a>.<a class="code" href="classSharedHandle.html#a800385e17e17cb826147968e748fd8fa">get_handle</a>(),</div><div class="line"><a name="l00387"></a><span class="
lineno"> 387</span>  &<a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4">status</a>)) {</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  LOG(WARNING) << <span class="stringliteral">"Failed to `GetExitCodeProcess`: "</span> << command;</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  }</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> </div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="comment">// Return the child exit code.</span></div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<<
/span><span class="keywordtype">int</span><span class="keyword">></span>(<a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4">status</a>);</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span> }</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span> </div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span> </div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="comment">// Executes a command by calling "cmd /c <command>", and returns</span></div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment">// after the command has been completed. Returns the process exit</span></div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment">// code on success and `None` on error.</span></div><div class="line"><a name="l00400"></a><span class=
"lineno"> 400</span> <span class="comment">//</span></div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="comment">// Note: Be cautious about shell injection</span></div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="comment">// (https://en.wikipedia.org/wiki/Code_injection#Shell_injection)</span></div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="comment">// when using this method and use proper validation and sanitization</span></div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="comment">// on the `command`. For this reason in general `os::spawn` is</span></div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="comment">// preferred if a shell is not required.</span></div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="
keyword">inline</span> <a class="code" href="classOption.html">Option<int></a> <a class="code" href="namespaceos.html#a75eb48541200e89e498d3d324ffc3089">system</a>(<span class="keyword">const</span> std::string& command)</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span> {</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceos.html#a18f614e5bdf40984c33888a5fa9599ca">os::spawn</a>(<a class="code" href="namespaceos_1_1Shell.html#acfe16ef2b1146ad49a8651c0a457ce46">Shell::name</a>, {<a class="code" href="namespaceos_1_1Shell.html#adeacb41dacfa03ad5ceebd9a53582997">Shell::arg0</a>, <a class="code" href="namespaceos_1_1Shell.html#a44f50f66f2a231de974b53c9f4384ba5">Shell::arg1</a>, command});</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span> }</div><div class="line"><a name="l00410"></a><span class="lineno"> 410<
/span> </div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="comment">// In order to emulate the semantics of `execvp`, `os::spawn` waits for the new</span></div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span> <span class="comment">// process to exit, and returns its error code, which is propogated back to the</span></div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span> <span class="comment">// parent via `exit` here.</span></div><div class="line"><a name="l00415"></a><span class="lineno"><a class="line" href="namespaceos.html#a1de77f208d0bc72cf79e7eb9a6b487c7"> 415</a></span> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="namespaceos.html#a1de77f208d0bc72cf79e7eb9a6b487c7">execvp</a>(</div><div class="line"><a name="l00416"></a><span class="
lineno"> 416</span>  <span class="keyword">const</span> std::string& command,</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keyword">const</span> std::vector<std::string>& argv)</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span> {</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  exit(<a class="code" href="namespaceos.html#a18f614e5bdf40984c33888a5fa9599ca">os::spawn</a>(command, argv).getOrElse(-1));</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span> }</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span> </div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span> </div><div class="line"><a name="l00424"></a><span class="lineno">
424</span> <span class="comment">// NOTE: This function can accept `Argv` and `Envp` constructs through their</span></div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span> <span class="comment">// explicit type conversions, but unlike the POSIX implementations, it cannot</span></div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="comment">// accept the raw forms.</span></div><div class="line"><a name="l00427"></a><span class="lineno"><a class="line" href="namespaceos.html#aebc3586b2be0d2b9093ccfbf25dfcde8"> 427</a></span> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="namespaceos.html#aebc3586b2be0d2b9093ccfbf25dfcde8">execvpe</a>(</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keyword">const</span> std::string& command,</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>&
#160; <span class="keyword">const</span> std::vector<std::string>& argv,</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keyword">const</span> std::map<std::string, std::string>& envp)</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span> {</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  exit(<a class="code" href="namespaceos.html#a18f614e5bdf40984c33888a5fa9599ca">os::spawn</a>(command, argv, envp).getOrElse(-1));</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span> }</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span> </div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span> } <span class="comment">// namespace os {</span></div><d
iv class="line"><a name="l00437"></a><span class="lineno"> 437</span> </div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="preprocessor">#endif // __STOUT_OS_WINDOWS_SHELL_HPP__</span></div><div class="ttc" id="namespaceinternal_1_1windows_html_a80d683d0925b1bfbff4bea3a5aa2e9b9"><div class="ttname"><a href="namespaceinternal_1_1windows.html#a80d683d0925b1bfbff4bea3a5aa2e9b9">internal::windows::stringify_args</a></div><div class="ttdeci">std::wstring stringify_args(const std::vector< std::string > &argv)</div><div class="ttdef"><b>Definition:</b> shell.hpp:163</div></div>
+<a href="windows_2shell_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// You may obtain a copy of the License at</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">/
/</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// limitations under the License.</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div cla
ss="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef __STOUT_OS_WINDOWS_SHELL_HPP__</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define __STOUT_OS_WINDOWS_SHELL_HPP__</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <process.h></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <stdarg.h></span> <span class="comment">// For va_list, va_start, etc.</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <algorithm></span></div><div class="line"><a name="l00020"
></a><span class="lineno"> 20</span> <span class="preprocessor">#include <array></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <map></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <<a class="code" href="error_8hpp.html">stout/error.hpp</a>></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <<a class="code" href="foreach_8hpp.html">stout/foreach.hpp</a>></span></d
iv><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <<a class="code" href="none_8hpp.html">stout/none.hpp</a>></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <<a class="code" href="option_8hpp.html">stout/option.hpp</a>></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="os_8hpp.html">stout/os.hpp</a>></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="try_8hpp.html">stout/try.hpp</a>></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html">stout/windows.hpp</a>></span></div><d
iv class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="code" href="int__fd_8hpp.html">stout/os/int_fd.hpp</a>></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="pipe_8hpp.html">stout/os/pipe.hpp</a>></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <<a class="code" href="inherit_8hpp.html">stout/internal/windows/inherit.hpp</a>></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">namespace </span><a class="code" href="n
amespaceinternal.html">internal</a> {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">namespace </span>windows {</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// Retrieves system environment in a `std::map`, ignoring</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// the current process's environment variables.</span></div><div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="namespaceinternal_1_1windows.html#a8fc9ccf78565ac55f90070486d385227"> 43</a></span> <span class="keyword">inline</span> <a class="code" href="classOption.html">Option<std::map<std::wstring, std::wstring></a>> <a class="code" href="namespaceinternal_1_1windows.html#a8fc9ccf78565ac55f90070486d385227">get
_system_env</a>()</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> {</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  std::map<std::wstring, std::wstring> system_env;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordtype">wchar_t</span>* env_entry = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">// Get the system environment.</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="comment">// The third parameter (bool) tells the function *not* to inherit</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="comment">// variables from the current process.</span></div><div class
="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">if</span> (!::CreateEnvironmentBlock((LPVOID*)&env_entry, <span class="keyword">nullptr</span>, FALSE)) {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  }</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">// Save the environment block in order to destroy it later.</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordtype">wchar_t</span>* env_block = env_entry;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l0
0058"></a><span class="lineno"> 58</span>  <span class="keywordflow">while</span> (*env_entry != L<span class="charliteral">'\0'</span>) {</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="comment">// Each environment block contains the environment variables as follows:</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// Var1=Value1\0</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// Var2=Value2\0</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// Var3=Value3\0</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// ...</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// VarN=ValueN\0\0</sp
an></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">// The name of an environment variable cannot include an equal sign (=).</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// Construct a string from the pointer up to the first '\0',</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="comment">// e.g. "Var1=Value1\0", then split into name and value.</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  std::wstring entry(env_entry);</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  std::wstring::size_type separator = entry.find(L<span class="stringliteral">"="</span>);</div><div class="line"><a name="l00071"></a><spa
n class="lineno"> 71</span>  std::wstring var_name(entry.substr(0, separator));</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  std::wstring varVal(entry.substr(separator + 1));</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">// Mesos variables are upper case. Convert system variables to</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="comment">// match the name provided by the scheduler in case of a collision.</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="comment">// This is safe because Windows environment variables are case insensitive.</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <a class="code" href="namespacemesos_1_1inte
rnal_1_1recordio.html#a5fcab68176c462aaeed909f304c91bdf">std::transform</a>(</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  var_name.begin(), var_name.end(), var_name.begin(), ::towupper);</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">// The system environment has priority.</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  system_env.insert_or_assign(var_name.data(), varVal.data());</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="comment">// Advance the pointer the length of the entry string plus the '\0'.</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  env_entry +=
entry.length() + 1;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  ::DestroyEnvironmentBlock(env_block);</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> system_env;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> }</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment">// Creates a null-terminated array of null-terminated strings that will be</span></div><div class="line
"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// passed to `CreateProcessW` as the `lpEnvironment` argument, as described by</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">// MSDN[1]. This array needs to be sorted in alphabetical order, but the `map`</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">// already takes care of that. Note that this function explicitly handles</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">// UTF-16 environments, so it must be used in conjunction with the</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// `CREATE_UNICODE_ENVIRONMENT` flag.</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">//</span></div><
div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">// NOTE: This function will add the system's environment variables into</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// the returned string. These variables take precedence over the provided</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// `env` and are generally necessary in order to launch things on Windows.</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">//</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// [1] https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425(v=vs.85).aspx</span></div><div class="line"><a name="l00105"></a><span class="lineno"><a class="line" href="namespaceinternal_1_1windows.html#a7b6974
b9ba88dd5d9658c40268147581"> 105</a></span> <span class="keyword">inline</span> <a class="code" href="classOption.html">Option<std::wstring></a> <a class="code" href="namespaceinternal_1_1windows.html#a7b6974b9ba88dd5d9658c40268147581">create_process_env</a>(</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">const</span> <a class="code" href="classOption.html">Option</a><std::map<std::string, std::string>>& env)</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">if</span> (env.isNone() || (env.isSome() && env.get().size() == 0)) {</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00110"></
a><span class="lineno"> 110</span>  }</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <a class="code" href="classOption.html">Option<std::map<std::wstring, std::wstring></a>> system_env = <a class="code" href="namespaceinternal_1_1windows.html#a8fc9ccf78565ac55f90070486d385227">get_system_env</a>();</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div c
<TRUNCATED>