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Posted to commits@mesos.apache.org by gi...@apache.org on 2018/06/14 04:22:11 UTC
[02/14] mesos-site git commit: Updated the website built from mesos
SHA: f8c8c35.
http://git-wip-us.apache.org/repos/asf/mesos-site/blob/ac68e329/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> <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 class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="comment">// The system environment must be non-empty.</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="comment">// No subprocesses will be able to launch if the system environment is blank.</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  CHECK(system_env.<a class="code" hre
f="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() && system_env.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>().size() > 0);</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  std::map<std::wstring, std::wstring> combined_env;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="comment">// Populate the combined environment first with the system environment.</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</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="l00122"></a><span class="lineno"> 122</span
>  <span class="keyword">const</span> std::wstring& value,</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  system_env.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>()) {</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  combined_env[key] = value;</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> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="comment">// Now override with the supplied environment.</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</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="l00129"
></a><span class="lineno"> 129</span>  <span class="keyword">const</span> std::string& value,</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  env.get()) {</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  combined_env[wide_stringify(key)] = wide_stringify(value);</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> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  std::wstring env_string;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</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="l00136"></a><span class="lineno"> 136</span>  <span cl
ass="keyword">const</span> std::wstring& value,</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  combined_env) {</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  env_string += key + L<span class="charliteral">'='</span> + value + L<span class="charliteral">'\0'</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> </div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="comment">// Append final null terminating character.</span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  env_string.push_back(L<span class="charliteral">'\0'</span>);</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> env_string;
</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> </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment">// Concatenates multiple command-line arguments and escapes the values.</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment">// NOTE: This is necessary even when using Windows APIs that "appear"</span></div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment">// to take arguments as a list, because those APIs will themselves</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment">// concatenate command-line arguments *without* escaping them.</span></div><div cla
ss="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment">//</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment">// This function escapes arguments with the following rules:</span></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment">// 1) Any argument with a space, tab, newline, vertical tab,</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment">// or double-quote must be surrounded in double-quotes.</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment">// 2) Backslashes at the very end of an argument must be escaped.</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment">// 3) Backslashes that precede a double-quote must be escaped.</span></div><div class="
line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment">// The double-quote must also be escaped.</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment">//</span></div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment">// NOTE: The below algorithm is adapted from Daniel Colascione's public domain</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">// algorithm for quoting command line arguments on Windows for `CreateProcess`.</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment">//</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment">// https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/</sp
an></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment">// NOLINT(whitespace/line_length)</span></div><div class="line"><a name="l00164"></a><span class="lineno"><a class="line" href="namespaceinternal_1_1windows.html#a80d683d0925b1bfbff4bea3a5aa2e9b9"> 164</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="l00165"></a><span class="lineno"> 165</span> {</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  std::wstring command;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> argit = argv.cbegin(); argit != argv.cend(); ++argit) {</div><div class="line"><a na
me="l00168"></a><span class="lineno"> 168</span>  std::wstring arg = wide_stringify(*argit);</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">// Don't quote empty arguments or those without troublesome characters.</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</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="l00171"></a><span class="lineno"> 171</span>  command.append(arg);</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">// Beginning double quotation mark.</span></div><div class="line"><a name="l00174"></a><span class="lineno">
174</span>  command.push_back(L<span class="charliteral">'"'</span>);</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> it = arg.cbegin(); it != arg.cend(); ++it) {</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="comment">// Count existent backslashes in argument.</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> backslashes = 0;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">while</span> (it != arg.cend() && *it == L<span class="charliteral">'\\'</span>) {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  ++it;</div><div class="line"><a name=
"l00180"></a><span class="lineno"> 180</span>  ++backslashes;</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> </div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">if</span> (it == arg.cend()) {</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="comment">// Escape all backslashes, but let the terminating double quotation</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="comment">// mark we add below be interpreted as a metacharacter.</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  command.append(backslashes * 2, L<span class="charliteral">'\\'</span>);</div><div class="line"><a name="l00187"></a><span cla
ss="lineno"> 187</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (*it == L<span class="charliteral">'"'</span>) {</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="comment">// Escape all backslashes and the following double quotation mark.</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  command.append(backslashes * 2 + 1, L<span class="charliteral">'\\'</span>);</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  command.push_back(*it);</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00193"></a><span class="lineno"> 193<
/span>  <span class="comment">// Backslashes aren't special here.</span></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  command.append(backslashes, L<span class="charliteral">'\\'</span>);</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  command.push_back(*it);</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> </div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// Terminating double quotation mark.</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  command.push_back(L<span class="charliteral">'"'</span>);</div><div class="line"><a name="l00
201"></a><span class="lineno"> 201</span>  }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="comment">// Space separate arguments (but don't append at end).</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">if</span> (argit != argv.cend() - 1) {</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  command.push_back(L<span class="charliteral">' '</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>  }</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="comment">// Append final null terminating character.</span></div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  command.push_back(L<span class="charlitera
l">'\0'</span>);</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">return</span> command;</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"> 212</span> </div><div class="line"><a name="l00213"></a><span class="lineno"><a class="line" href="structinternal_1_1windows_1_1ProcessData.html"> 213</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="l00214"></a><span class="lineno"><a class="line" href="structinternal_1_1windows_1_1ProcessData.html#a96c76121644bd430e9ca67cf57636c0d"> 214</a></span>  <a class="code" href="classSharedHandle.html">SharedHandle</a> <a class="code" href="structinternal_1_1windows_1_1
ProcessData.html#a96c76121644bd430e9ca67cf57636c0d">process_handle</a>;</div><div class="line"><a name="l00215"></a><span class="lineno"><a class="line" href="structinternal_1_1windows_1_1ProcessData.html#a7160cf48fc6e70d9390233b246b93bee"> 215</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="l00216"></a><span class="lineno"><a class="line" href="structinternal_1_1windows_1_1ProcessData.html#a65a4a4aba5450087363bfffdb30eea25"> 216</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="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> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment">// Provides an interface for creating a child process on Windows.</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment">//</span></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment">// The `command` argument is given for compatibility, and is ignored. This is</span></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment">// because the `CreateProcess` will use `argv[0]` as the command to be executed,</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment">// and will perform a `PATH` lookup. If `command` were to be used instead,</span></div><
div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment">// `CreateProcess` would require an absolute path.</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment">//</span></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment">// If `create_suspended` is `true`, the process will not be started, and the</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment">// caller must use `ResumeThread` to start the process.</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment">//</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment">// The caller can specify explicit `stdin`, `stdout`, and `stderr` handles,</span></div><div class="line"><a name="l00231"></a><span class="lineno">
231</span> <span class="comment">// in that order, for the process via the `pipes` argument.</span></div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment">//</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment">// NOTE: If `pipes` are specified, they will be temporarily set to</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment">// inheritable, and then set to uninheritable. This is a side effect</span></div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment">// on each `HANDLE`.</span></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment">//</span></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment">// The return value is a `ProcessData` struct, with the proces
s and thread</span></div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment">// handles each saved in a `SharedHandle`, ensuring they are closed when struct</span></div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment">// goes out of scope.</span></div><div class="line"><a name="l00240"></a><span class="lineno"><a class="line" href="namespaceinternal_1_1windows.html#aaaa193083fd4f24a2e92e57ee8a8319f"> 240</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="l00241"></a><span class="lineno"> 241</span>  <span class="keyword">const</span> std::string& command,</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keyword">const
</span> std::vector<std::string>& argv,</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</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="l00244"></a><span class="lineno"> 244</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> create_suspended = <span class="keyword">false</span>,</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</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="l00246"></a><span class="lineno"> 246</span> {</div><div class="line"><a name="l0
0247"></a><span class="lineno"> 247</span>  <span class="comment">// TODO(andschwa): Assert that `command` and `argv[0]` are the same.</span></div><div class="line"><a name="l00248"></a><span class="lineno"> 248</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="l00249"></a><span class="lineno"> 249</span>  std::vector<wchar_t> arg_buffer(arg_string.begin(), arg_string.end());</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  arg_buffer.push_back(L<span class="charliteral">'\0'</span>);</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="comment">// Create the process with a Unicode environment.</span></div><div class="lin
e"><a name="l00253"></a><span class="lineno"> 253</span>  DWORD creation_flags = CREATE_UNICODE_ENVIRONMENT;</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">if</span> (create_suspended) {</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  creation_flags |= CREATE_SUSPENDED;</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> </div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="comment">// Construct the environment that will be passed to `::CreateProcessW`.</span></div><div class="line"><a name="l00259"></a><span class="lineno"> 259</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="line"><a name="l00260"></a><span class="lineno"> 260</span>  std::vector<wchar_t> env_buffer;</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">if</span> (env_string.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>()) {</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="comment">// This string contains the necessary null characters.</span></div><div class="line"><a name="l00263"></a><span class="lineno"> 263</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="l00264"></a><span class="lineno"> 264</span>  }</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</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="l00267"></a><span class="lineno"> 267</span> </div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  PROCESS_INFORMATION process_info = {};</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span> </div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  STARTUPINFOW startup_info = {};</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  startup_info.cb = <span class="keyword">sizeof</span>(STARTUPINFOW);</div><div class="line"><a name="l00
272"></a><span class="lineno"> 272</span> </div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="comment">// Hook up the stdin/out/err pipes and use the `STARTF_USESTDHANDLES`</span></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="comment">// flag to instruct the child to use them [1].</span></div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="comment">// A more user-friendly example can be found in [2].</span></div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="comment">//</span></div><div class="line"><a name="l00277"></a><span class="lineno"> 277</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="l00278"></a><span class="lineno"> 278</span>  <span class="comment">// [2] http
s://msdn.microsoft.com/en-us/library/windows/desktop/ms682499(v=vs.85).aspx</span></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">if</span> (pipes.isSome()) {</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="comment">// Each of these handles must be inheritable.</span></div><div class="line"><a name="l00281"></a><span class="lineno"> 281</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="l00282"></a><span class="lineno"> 282</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="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">if</span> (inherit.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</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="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> </div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  startup_info.dwFlags |= STARTF_USESTDHANDLES;</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  startup_info.hS
tdInput = std::get<0>(pipes.get());</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  startup_info.hStdOutput = std::get<1>(pipes.get());</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  startup_info.hStdError = std::get<2>(pipes.get());</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> </div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keyword">const</span> BOOL result = ::CreateProcessW(</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="comment">// This is replaced by the first token of `arg_buffer` string.</span></div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  static_cast<LPCWSTR>(<span class="keyword">nullptr</span>),</div><d
iv class="line"><a name="l00297"></a><span class="lineno"> 297</span>  static_cast<LPWSTR>(arg_buffer.data()),</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  static_cast<LPSECURITY_ATTRIBUTES>(<span class="keyword">nullptr</span>),</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keyword">static_cast<</span>LPSECURITY_ATTRIBUTES<span class="keyword">></span>(<span class="keyword">nullptr</span>),</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  TRUE, <span class="comment">// Inherit parent process handles (such as those in `pipes`).</span></div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  creation_flags,</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  static_cast<LPVOID>(process_env),</div><div class="line"><a name="l00303"></a><span cla
ss="lineno"> 303</span>  <span class="keyword">static_cast<</span>LPCWSTR<span class="keyword">></span>(<span class="keyword">nullptr</span>), <span class="comment">// Inherit working directory.</span></div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  &startup_info,</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  &process_info);</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span> </div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">// NOTE: The MSDN documentation for `CreateProcess` states that it</span></div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="comment">// returns before the process has "finished initialization," but is</span></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="commen
t">// not clear on precisely what initialization entails. It would seem</span></div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="comment">// that this does not affect inherited handles, as it stands to</span></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="comment">// reason that the system call to `CreateProcess` causes inheritable</span></div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="comment">// handles to become inherited, and not some "initialization" of the</span></div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="comment">// child process. However, if an inheritance race condition</span></div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="comment">// manifests, this assumption should be re-evaluated.</span></div><div class="line"
><a name="l00315"></a><span class="lineno"> 315</span> </div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">if</span> (pipes.isSome()) {</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="comment">// These handles should no longer be inheritable. This prevents other child</span></div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="comment">// processes from accidentally inheriting the wrong handles.</span></div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="comment">//</span></div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="comment">// NOTE: This is explicit, and does not take into account the</span></div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="comment">// previous inherita
nce semantics of each `HANDLE`. It is assumed</span></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="comment">// that users of this function send non-inheritable handles.</span></div><div class="line"><a name="l00323"></a><span class="lineno"> 323</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="l00324"></a><span class="lineno"> 324</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="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">if</span> (inherit.<a class="code" h
ref="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</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="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> </div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">if</span> (result == FALSE) {</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">return</span> <a class="code" href="classWindows
Error.html">WindowsError</a>(</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</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="l00334"></a><span class="lineno"> 334</span>  }</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span> </div><div class="line"><a name="l00336"></a><span class="lineno"> 336</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="l00337"></a><span class="lineno"> 337</span>  <a class="code" href="classSharedHandle.html">SharedHandle</a>{process_info.hThread, ::CloseHandle},</div
><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keyword">static_cast<</span><a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a><span class="keyword">></span>(process_info.dwProcessId)};</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> </div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> } <span class="comment">// namespace windows {</span></div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> } <span class="comment">// namespace internal {</span></div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="keyword">namespace </span><a class="code" href="na
mespaceos.html">os</a> {</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span> <span class="keyword">namespace </span>Shell {</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span> </div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="comment">// Canonical constants used as platform-dependent args to `exec` calls.</span></div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment">// `name` is the command name, `arg0` is the first argument received</span></div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment">// by the callee, usually the command name and `arg1` is the second</span></div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment">// command argument received by the callee.</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#acfe16ef2b1146ad49a8651c0a457ce46">name</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#adeacb41dacfa03ad5ceebd9a53582997">arg0</a> = <span class="stringliteral">"cmd.exe"</span>;</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</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="l00354"></a><span class="lineno"> 354</span> </div><div class="line"><
a name="l00355"></a><span class="lineno"> 355</span> } <span class="comment">// namespace Shell {</span></div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span> </div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment">// Runs a shell command (with `cmd.exe`) with optional arguments.</span></div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment">//</span></div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="comment">// This assumes that a successful execution will result in the exit</span></div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment">// code for the command to be `0`; in this case, the contents of the</span></div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment">// `Try` will be the contents of `stdout`.<
/span></div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment">//</span></div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment">// If the exit code is non-zero, we will return an appropriate error</span></div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment">// message; but *not* `stderr`.</span></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment">//</span></div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="comment">// If the caller needs to examine the contents of `stderr` it should</span></div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="comment">// be redirected to `stdout` (using, e.g., `2>&1 || exit /b 0` in the</span></div><div class="line"><a name="l00368"></a><span class="lineno">
368</span> <span class="comment">// command string). The `|| exit /b 0` is required to obtain a success</span></div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="comment">// exit code in case of errors, and still obtain `stderr`, as piped to</span></div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="comment">// `stdout`.</span></div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="keyword">template</span> <<span class="keyword">typename</span>... T></div><div class="line"><a name="l00372"></a><span class="lineno"> 372</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)</div><div class="line"><a name="l00373"></a><span class="lineno
"> 373</span> {</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keyword">using</span> std::array;</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keyword">using</span> std::string;</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keyword">using</span> std::vector;</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span> </div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keyword">const</span> <a class="code" href="classTry.html">Try<string></a> command = <a class="code" href="namespacestrings_1_1internal.html#a870e2db270d980f83de20525ec414d2a">strings::internal::format</a>(fmt, t...);</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">if</span> (command.<a class="code" href="classTry.html#a0b98
f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(command.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  }</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span> </div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="comment">// This function is intended to pass the arguments to the default</span></div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="comment">// shell, so we first add the arguments `cmd.exe cmd.exe /c`,</span></div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="comment">// followed by the command and arguments given.
</span></div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  vector<string> args = {<a class="code" href="namespaceos_1_1Shell.html#acfe16ef2b1146ad49a8651c0a457ce46">os::Shell::name</a>, <a class="code" href="namespaceos_1_1Shell.html#adeacb41dacfa03ad5ceebd9a53582997">os::Shell::arg0</a>, <a class="code" href="namespaceos_1_1Shell.html#a44f50f66f2a231de974b53c9f4384ba5">os::Shell::arg1</a>};</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> </div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  { <span class="comment">// Minimize the lifetime of the system allocated buffer.</span></div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="comment">//</span></div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="comment">// NOTE: This API returns a pointer to an array of `wchar_t*`,</span></div><d
iv class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="comment">// similar to `argv`. Each pointer to a null-terminated Unicode</span></div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="comment">// string represents an individual argument found on the command</span></div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="comment">// line. We use this because we cannot just split on whitespace.</span></div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keywordtype">int</span> argc;</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="keyword">const</span> std::unique_ptr<wchar_t*, decltype(&::LocalFree)> argv(</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  ::CommandLineToArgvW(wide_stringify(command.<a class="c
ode" href="classTry.html#a8bc7f43e75a47111ea18e9c83b007be5">get</a>()).data(), &argc),</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  &::LocalFree);</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">if</span> (argv == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keywordflow">return</span> <a class="code" href="classWindowsError.html">WindowsError</a>();</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  }</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span> </div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < argc; ++i) {</div><div class="line"><a name="l00403"></a><span class="lineno"> 40
3</span>  args.push_back(<a class="code" href="namespacens.html#a28116b46e6543597a11733424cd1aa20">stringify</a>(std::wstring(argv.get()[i])));</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  }</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  }</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> </div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="comment">// This function is intended to return only the `stdout` of the</span></div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="comment">// command; but since we have to redirect all of `stdin`, `stdout`,</span></div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="comment">// `stderr` if we want to redirect any one of them, we redirect</span></div><div class="line"><a name="l00410"></a><
span class="lineno"> 410</span>  <span class="comment">// `stdin` and `stderr` to `NUL`, and `stdout` to a pipe.</span></div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <a class="code" href="classTry.html">Try<int_fd></a> stdin_ = <a class="code" href="namespaceos.html#aaf5d5468adc1b85cf9bb7126e70807ca">os::open</a>(<a class="code" href="namespaceos.html#a8d90278daa51c4fe9fcb9e54757187b5">os::DEV_NULL</a>, O_RDONLY);</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">if</span> (stdin_.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(stdin_.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00414"></
a><span class="lineno"> 414</span>  }</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span> </div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <a class="code" href="classTry.html">Try<array<int_fd, 2></a>> stdout_ = <a class="code" href="namespaceos.html#afefbea8a88b84bed66580372accb18a9">os::pipe</a>();</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordflow">if</span> (stdout_.isError()) {</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(stdout_.error());</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  }</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span> </div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <a class="code"
href="classTry.html">Try<int_fd></a> stderr_ = <a class="code" href="namespaceos.html#aaf5d5468adc1b85cf9bb7126e70807ca">os::open</a>(<a class="code" href="namespaceos.html#a8d90278daa51c4fe9fcb9e54757187b5">os::DEV_NULL</a>, O_WRONLY);</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="keywordflow">if</span> (stderr_.isError()) {</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(stderr_.error());</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  }</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span> </div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="comment">// Ensure the file descriptors are closed when we leave this scope.</span></div><div class="line"><a name="l00427"></a><span class="lineno
"> 427</span>  <span class="keyword">struct </span>Closer</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  {</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  vector<int_fd> fds;</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  ~Closer()</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>  <span class="keywordflow">foreach</span> (<a class="code" href="int__fd_8hpp.html#aea4dbda01c90455f158ffa9b924c2f07">int_fd</a>& fd, fds) {</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <a class="code" href="namespaceos.html#a8df77ec6d6b8d32d9b287a41bc74cfdc">os::close</a>(fd);</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>  } closer = {{stdin_.<a class="code" href="classTry.html#a8bc7f43e75a47111ea18e9c83b007be5">get</a>(), stdout_.get()[0], stderr_.get()}};</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span> </div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  array<int_fd, 3> pipes = {stdin_.<a class="code" href="classTry.html#a8bc7f43e75a47111ea18e9c83b007be5">get</a>(), stdout_.get()[1], stderr_.get()};</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> </div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="keyword">using namespace </span>::<a class="code" href="namespaceinternal_1_1windows.html">internal::windows</a>;</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span> </div><div class="lin
e"><a name="l00442"></a><span class="lineno"> 442</span>  <a class="code" href="classTry.html">Try<ProcessData></a> process_data =</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <a class="code" href="namespaceinternal_1_1windows.html#aaaa193083fd4f24a2e92e57ee8a8319f">create_process</a>(args.front(), args, <a class="code" href="structNone.html">None</a>(), <span class="keyword">false</span>, pipes);</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span> </div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keywordflow">if</span> (process_data.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(process_data.<a class="code" href="classTry.html#aec4a11dd
d3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  }</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span> </div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="comment">// Close the child end of the stdout pipe and then read until EOF.</span></div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <a class="code" href="namespaceos.html#a8df77ec6d6b8d32d9b287a41bc74cfdc">os::close</a>(stdout_.get()[1]);</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordtype">string</span> out;</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <a class="code" href="classResult.html">Result<string></a> part = <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00453"></a><span class="lineno"> 453</spa
n>  <span class="keywordflow">do</span> {</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  part = <a class="code" href="namespaceos.html#aa1d97ff0a93229e1fe6b33e3e2d567f7">os::read</a>(stdout_.get()[0], 1024);</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordflow">if</span> (part.<a class="code" href="classResult.html#a85eaa52037223d71092e65701c166562">isSome</a>()) {</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  out += part.<a class="code" href="classResult.html#aedf79f3b14dcda5791b84a64ada4d412">get</a>();</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  }</div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  } <span class="keywordflow">while</span> (part.<a class="code" href="classResult.html#a85eaa52037223d71092e65701c166562">isSome</a>());</div><div class="line"><a na
me="l00459"></a><span class="lineno"> 459</span> </div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="comment">// Wait for the process synchronously.</span></div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  ::WaitForSingleObject(process_data->process_handle.get_handle(), INFINITE);</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span> </div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  DWORD <a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4">status</a>;</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">if</span> (!::GetExitCodeProcess(</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  process_data->process_handle.get_handle(), &<a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4
">status</a>)) {</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to `GetExitCodeProcess`: "</span> + command.<a class="code" href="classTry.html#a8bc7f43e75a47111ea18e9c83b007be5">get</a>());</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  }</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> </div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="keywordflow">if</span> (status == 0) {</div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="keywordflow">return</span> out;</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  }</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span> </div><div class="lin
e"><a name="l00473"></a><span class="lineno"> 473</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="stringliteral">"Failed to execute '"</span> + command.<a class="code" href="classTry.html#a8bc7f43e75a47111ea18e9c83b007be5">get</a>() +</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  <span class="stringliteral">"'; the command was either "</span></div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="stringliteral">"not found or exited with a non-zero exit status: "</span> +</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  <a class="code" href="namespacens.html#a28116b46e6543597a11733424cd1aa20">stringify</a>(status));</div><div class="line"><a name="l00478"></a><span class
="lineno"> 478</span> }</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span> </div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span> </div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span> <span class="keyword">template</span><<span class="keyword">typename</span>... T></div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span> <span class="keyword">inline</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="l00483"></a><span class="lineno"> 483</span> </div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span> </div
><div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="comment">// Executes a command by calling "<command> <arguments...>", and</span></div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="comment">// returns after the command has been completed. Returns the process exit</span></div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="comment">// code on success and `None` on error.</span></div><div class="line"><a name="l00488"></a><span class="lineno"><a class="line" href="namespaceos.html#abedec07e6e468b54920d3b921a49eb36"> 488</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="l00489"></a><span class="lineno"> 489</span>  <span class="keyword">const</span
> std::string& command,</div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keyword">const</span> std::vector<std::string>& arguments,</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</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> = <a class="code" href="structNone.html">None</a>())</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span> {</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <span class="keyword">using namespace </span>::<a class="code" href="namespaceinternal_1_1windows.html">internal::windows</a>;</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span> </div><div class="line"><a
name="l00495"></a><span class="lineno"> 495</span>  <a class="code" href="classTry.html">Try<ProcessData></a> process_data =</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <a class="code" href="namespaceinternal_1_1windows.html#aaaa193083fd4f24a2e92e57ee8a8319f">create_process</a>(command, arguments, <a class="code" href="namespacemesos_1_1internal_1_1tests.html#a1396c5e3b0a179220de2792d74770ec2">environment</a>);</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  <span class="keywordflow">if</span> (process_data.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  LOG(WARNING) << process_data.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>();</div><div cla
ss="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  }</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span> </div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  <span class="comment">// Wait for the process synchronously.</span></div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  ::WaitForSingleObject(process_data->process_handle.get_handle(), INFINITE);</div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span> </div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  DWORD <a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4">status</a>;</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span>
0; <span class="keywordflow">if</span> (!::GetExitCodeProcess(</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  process_data->process_handle.get_handle(), &<a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4">status</a>)) {</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  LOG(WARNING) << <span class="stringliteral">"Failed to `GetExitCodeProcess`: "</span> << command;</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  }</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span> </div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <span class="comment">// Return the child exit code.</span>
</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</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="l00515"></a><span class="lineno"> 515</span> }</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span> </div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span> </div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span> <span class="comment">// Executes a command by calling "cmd /c <command>", and returns</span></div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="comment">// after the command has been completed. Returns the process exit</span></div><div class="line"><a name="l00520"></a>
<span class="lineno"> 520</span> <span class="comment">// code on success and `None` on error.</span></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span> <span class="comment">//</span></div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="comment">// Note: Be cautious about shell injection</span></div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span> <span class="comment">// (https://en.wikipedia.org/wiki/Code_injection#Shell_injection)</span></div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span> <span class="comment">// when using this method and use proper validation and sanitization</span></div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <span class="comment">// on the `command`. For this reason in general `os::spawn` is</span></div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span> <s
pan class="comment">// preferred if a shell is not required.</span></div><div class="line"><a name="l00527"></a><span class="lineno"> 527</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="l00528"></a><span class="lineno"> 528</span> {</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</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>, com
mand});</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span> }</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span> </div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span> </div><div class="line"><a name="l00533"></a><span class="lineno"> 533</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="l00534"></a><span class="lineno"> 534</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="l00535"></a><span class="lineno"> 535</span> <span class="comment">// parent via `exit` here.</span></div><div class="line"><a name="l00536"></a><span class="lineno"><a class="line" href="namespaceos.html#a1de77f208d0bc72cf79e7eb9a6b487c7"> 536</a></span> <span class="keyword">inline</span> <span class="key
wordtype">int</span> <a class="code" href="namespaceos.html#a1de77f208d0bc72cf79e7eb9a6b487c7">execvp</a>(</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keyword">const</span> std::string& command,</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keyword">const</span> std::vector<std::string>& argv)</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span> {</div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  exit(<a class="code" href="namespaceos.html#a18f614e5bdf40984c33888a5fa9599ca">os::spawn</a>(command, argv).getOrElse(-1));</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span> }</div><div class="line"><a name="l00543"></a><span class="lineno"> 543
</span> </div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span> </div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span> <span class="comment">// NOTE: This function can accept `Argv` and `Envp` constructs through their</span></div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span> <span class="comment">// explicit type conversions, but unlike the POSIX implementations, it cannot</span></div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span> <span class="comment">// accept the raw forms.</span></div><div class="line"><a name="l00548"></a><span class="lineno"><a class="line" href="namespaceos.html#aebc3586b2be0d2b9093ccfbf25dfcde8"> 548</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="l00549"></a><span class="linen
o"> 549</span>  <span class="keyword">const</span> std::string& command,</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span
<TRUNCATED>