http://git-wip-us.apache.org/repos/asf/mesos-site/blob/4b928319/content/api/latest/c++/posix_2os_8hpp_source.html ---------------------------------------------------------------------- diff --git a/content/api/latest/c++/posix_2os_8hpp_source.html b/content/api/latest/c++/posix_2os_8hpp_source.html index 4b549b8..ab0268d 100644 --- a/content/api/latest/c++/posix_2os_8hpp_source.html +++ b/content/api/latest/c++/posix_2os_8hpp_source.html @@ -52,7 +52,7 @@ <div class="title">os.hpp</div> </div> </div><!--header--> <div class="contents"> -<a href="posix_2os_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">//</sp an></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 class="l ine"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef __STOUT_POSIX_OS_HPP__</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define __STOUT_POSIX_OS_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 <errno.h></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#ifdef __sun</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <sys/loadavg.h></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#define dirfd(dir) ((dir)->d_fd)</span></div><div class="line"><a name="l00020"></a><span class="linen o"> 20</span> <span class="preprocessor">#ifndef NAME_MAX</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define NAME_MAX MAXNAMLEN</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#endif // NAME_MAX</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <fts.h></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#endif // __sun</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <glob.h></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor ">#include <grp.h></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <limits.h></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <netdb.h></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <pwd.h></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <signal.h></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <stddef.h></span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <stdio.h></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#i nclude <stdlib.h></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <unistd.h></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <utime.h></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="preprocessor">#include <sys/ioctl.h></span></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="preprocessor">#ifdef __linux__</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <linux/version.h></span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="preprocessor">#include <sys/sysinfo.h></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#endif // __linux__</span></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> <span class="preprocessor">#include <sys/ioctl.h></span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include <sys/utsname.h></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include <sys/wait.h></span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include <list></span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include <map></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#include <mutex></span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include <set></span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#include <<a class="code" href="synchronized_8hpp.html">stout/synchronized.hpp</a>></span></div><div class="line"><a name="l00057"></a><span class=" lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#include <<a class="code" href="close_8hpp.html">stout/os/close.hpp</a>></span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#include <<a class="code" href="3rdparty_2stout_2include_2stout_2os_2environment_8hpp.html">stout/os/environment.hpp</a>></span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#include <<a class="code" href="fcntl_8hpp.html">stout/os/fcntl.hpp</a>></span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#include <<a class="code" href="find_8hpp.html">stout/os/find.hpp</a>></span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#include <<a class="code" href="fork_8hpp.html">stout/os/fork.hpp</a>></span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#include <<a class="code" href="getcwd_8hpp.html">stout/os/getcwd.hpp</a>></span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor">#include <<a class="code" href="killtree_8hpp.html">stout/os/killtree.hpp</a>></span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#include <<a class="code" href="os_2os_8hpp.html">stout/os/os.hpp</a>></span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor">#include <<a class="code" href="permissions_8hpp.html">stout/os/permissions.hpp</a>></span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor">#include <<a class="code" h ref="3rdparty_2stout_2include_2stout_2os_2read_8hpp.html">stout/os/read.hpp</a>></span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#include <<a class="code" href="rename_8hpp.html">stout/os/rename.hpp</a>></span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#include <<a class="code" href="sendfile_8hpp.html">stout/os/sendfile.hpp</a>></span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#include <<a class="code" href="signals_8hpp.html">stout/os/signals.hpp</a>></span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#include <<a class="code" href="strerror_8hpp.html">stout/os/strerror.hpp</a>></span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preproce ssor">#include <<a class="code" href="write_8hpp.html">stout/os/write.hpp</a>></span></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="preprocessor">#ifdef __FreeBSD__</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor">#include <<a class="code" href="freebsd_8hpp.html">stout/os/freebsd.hpp</a>></span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#ifdef __linux__</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#include <<a class="code" href="3rdparty_2stout_2include_2stout_2os_2linux_8hpp.html">stout/os/linux.hpp</a>></ span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="preprocessor">#endif // __linux__</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#include <<a class="code" href="open_8hpp.html">stout/os/open.hpp</a>></span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor">#ifdef __APPLE__</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#include <<a class="code" href="osx_8hpp.html">stout/os/osx.hpp</a>></span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#endif // __APPLE__</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#ifdef __sun</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#include <<a class="code" href="sunos_8hpp.html">stout/os/sunos.hpp</a>></span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#endif // __sun</span></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="preprocessor">#include <<a class="code" href="chown_8hpp.html">stout/os/posix/chown.hpp</a>></span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#include <<a class="code" href="3rdparty_2stout_2include_2stout_2os_2raw_2environment_8hpp.html">stout/os/raw/environment.hpp</a>></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> <span class="preprocessor"># include <<a class="code" href="shell_8hpp.html">stout/os/shell.hpp</a>></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="keyword">namespace </span><a class="code" href="namespaceos.html">os</a> {</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">// Import `::gmtime_r` into `os::` namespace.</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <a class="code" href="namespaceos.html#a5e0295f0e3bae2bd29d86803f9293b5d">using ::gmtime_r</a>;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// Import `::hstrerror` into `os::` namespace.< /span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <a class="code" href="namespaceos.html#a73c0258b355f6a38f3809bcd16a8f25a">using ::hstrerror</a>;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// Import `::random` into `os::` namespace.</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <a class="code" href="namespaceos.html#aede9f61dcb4b7d1f276302a7bce37446">using ::random</a>;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// Forward declarations.</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing&g t;</a> <a class="code" href="namespaceos.html#a818327458964860a86fc8964e4795b4d">utime</a>(<span class="keyword">const</span> std::string&);</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<std::list<Process></a>> <a class="code" href="namespaceos.html#aa98ca8ac255e2b9c689979a1b40084d3">processes</a>();</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> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">// Suspends execution of the calling process until a child specified by `pid`</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment">// has changed state. Unlike the POSIX standard function `::waitpid`, this</span></div><div class="lin e"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment">// function does not use -1 and 0 to signify errors and nonblocking return.</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment">// Instead, we return `Result<pid_t>`:</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">// * In case of error, we return `Error` rather than -1. For example, we</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment">// would return an `Error` in case of `EINVAL`.</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment">// * In case of nonblocking return, we return `None` rather than 0. For</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment">// example, if we pass `WN OHANG` in the `options`, we would expect 0 to be</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment">// returned in the case that children specified by `pid` exist, but have</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">// not changed state yet. In this case we return `None` instead.</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment">//</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">// NOTE: There are important differences between the POSIX and Windows</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment">// implementations of this function:</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment">// * On POSIX, `p id_t` is a signed number, but on Windows, PIDs are `DWORD`,</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment">// which is `unsigned long`. Thus, if we use `DWORD` to represent the `pid`</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment">// argument, we would not be able to pass -1 as the `pid`.</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment">// * Since it is important to be able to detect -1 has been passed to</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment">// `os::waitpid`, as a matter of practicality, we choose to:</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment">// (1) Use `long` to represent the `pid` argument.</span></div><div class="line"><a name="l00 128"></a><span class="lineno"> 128</span> <span class="comment">// (2) Disable using any value <= 0 for `pid` on Windows.</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment">// * This decision is pragmatic. The reasoning is:</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment">// (1) The Windows code paths call `os::waitpid` in only a handful of</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment">// places, and in none of these conditions do we need `-1` as a value.</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment">// (2) Since PIDs virtually never take on values outside the range of</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment">// vanilla sig ned `long` it is likely that an accidental conversion</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment">// will never happen.</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment">// (3) Even though it is not formalized in the C specification, the</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment">// implementation of `long` on the vast majority of production servers</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment">// is 2's complement, so we expect that when we accidentally do</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment">// implicitly convert from `unsigned long` to `long`, we will "wrap</span></div><div class="line"><a name="l00139 "></a><span class="lineno"> 139</span> <span class="comment">// around" to negative values. And since we've disabled the negative</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment">// `pid` in the Windows implementation, we should error out.</span></div><div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="namespaceos.html#a48c86262928f59c5c54d0cb0012e2aba"> 141</a></span> <span class="keyword">inline</span> <a class="code" href="classResult.html">Result<pid_t></a> <a class="code" href="namespaceos.html#a48c86262928f59c5c54d0cb0012e2aba">waitpid</a>(<a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a> pid, <span class="keywordtype">int</span>* <a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4">status</a>, <span class="keywordtype">int</span> options)</div><div clas s="line"><a name="l00142"></a><span class="lineno"> 142</span> {</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keyword">const</span> <a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a> child_pid = <a class="code" href="namespaceos.html#a48c86262928f59c5c54d0cb0012e2aba">::waitpid</a>(pid, status, options);</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>  <span class="keywordflow">if</span> (child_pid == 0) {</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordflow">return</span> <a class="code" href="structNone.html">None</a>();</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (c hild_pid < 0) {</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>(<span class="stringliteral">"os::waitpid: Call to `waitpid` failed"</span>);</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">return</span> child_pid;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> }</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comm ent">// Sets the value associated with the specified key in the set of</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment">// environment variables.</span></div><div class="line"><a name="l00157"></a><span class="lineno"><a class="line" href="namespaceos.html#ac0f608e2a32764327e38c53d0d51527d"> 157</a></span> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespaceos.html#ac0f608e2a32764327e38c53d0d51527d">setenv</a>(<span class="keyword">const</span> std::string& key,</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">const</span> std::string& value,</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordtype">bool</span> overwrite = <span class="keyword">true</span>)</div><div class="line"><a name="l00160"></a><span class= "lineno"> 160</span> {</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <a class="code" href="namespaceos.html#ac0f608e2a32764327e38c53d0d51527d">::setenv</a>(key.c_str(), value.c_str(), overwrite ? 1 : 0);</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> }</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </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> <span class="comment">// Unsets the value associated with the specified key in the set of</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment">// environment variables.</span></div><div class="line"><a name="l00167"></a><span class="lineno"><a class="line" href="namespaceos.html#a7471e14f4cbd7e23b5daa21e556f4eb5"> 167</a></span> <span class="key word">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespaceos.html#a7471e14f4cbd7e23b5daa21e556f4eb5">unsetenv</a>(<span class="keyword">const</span> std::string& key)</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> {</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <a class="code" href="namespaceos.html#a7471e14f4cbd7e23b5daa21e556f4eb5">::unsetenv</a>(key.c_str());</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> }</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment">// Erases the value associated with the specified key from the set of</span></div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <spa n class="comment">// environment variables.</span></div><div class="line"><a name="l00175"></a><span class="lineno"><a class="line" href="namespaceos.html#afe5b6cbeb92f2df4f8f6211d8b0c8be4"> 175</a></span> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespaceos.html#afe5b6cbeb92f2df4f8f6211d8b0c8be4">eraseenv</a>(<span class="keyword">const</span> std::string& key)</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> {</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordtype">char</span> * value = <a class="code" href="namespaceos.html#add69634db977768c56f0367b4bb03cd5">::getenv</a>(key.c_str());</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">// Erase the old value so that on Linux it can't be i nspected through</span></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// /proc/$pid/environ.</span></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">if</span> (value) {</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  ::memset(value, <span class="charliteral">'\0'</span>, ::strlen(value));</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  }</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <a class="code" href="namespaceos.html#a7471e14f4cbd7e23b5daa21e556f4eb5">::unsetenv</a>(key.c_str());</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> }</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment">// This function is a portable version of execvpe ('p' means searching</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment">// executable from PATH and 'e' means setting environments). We add</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment">// this function because it is not available on all systems.</span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment">//</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment">// NOTE: This function is not thread safe. It is supposed to be used</span></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</sp an> <span class="comment">// only after fork (when there is only one thread). This function is</span></div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment">// async signal safe.</span></div><div class="line"><a name="l00196"></a><span class="lineno"><a class="line" href="namespaceos.html#a4cfd127336013491258ee10a8985e226"> 196</a></span> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="namespaceos.html#aebc3586b2be0d2b9093ccfbf25dfcde8">execvpe</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="namespacemesos_1_1uri.html#a0a3b30c1eb427c4053aaef120b1f453c">file</a>, <span class="keywordtype">char</span>** argv, <span class="keywordtype">char</span>** envp)</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="keywordtype">char</span>** saved = <a class="code" href="namespaceos_1_1raw.html#aad2bd3acb3ca09c75a1a1db58075f9f4">os::raw::environment</a>();</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> </div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  *<a class="code" href="namespaceos_1_1raw.html#a255f9fd6996adf47571d24586f9ba8fe">os::raw::environmentp</a>() = envp;</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordtype">int</span> result = <a class="code" href="namespaceos.html#a0b80877b34088be8d5ba3eb9b0567ed7">execvp</a>(file, argv);</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  *<a class="code" href="namespaceos_1_1raw.html#a255f9fd6996adf47571d24586f9ba 8fe">os::raw::environmentp</a>() = saved;</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="keywordflow">return</span> result;</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> }</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> </div><div class="line"><a name="l00210"></a><span class="lineno"><a class="line" href="namespaceos.html#ab9f08ced036cc5156a11a86090768bb5"> 210</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespaceos.html#ab9f08ced036cc5156a11a86090768bb5">chmod</a>(<span class="keyword">const</span> std::string& <a class="code" href="namespacepath.html">path</a>, <span class="keywordtype">int</span> <a class="code" href="namespaceos_1_1stat.html#afc51654ad486693167c300612bf8ebfa">mode</a>)</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>  <span class="keywordflow">if</span> (::<a class="code" href="namespaceos.html#ab9f08ced036cc5156a11a86090768bb5">chmod</a>(path.c_str(), <a class="code" href="namespaceos_1_1stat.html#afc51654ad486693167c300612bf8ebfa">mode</a>) < 0) {</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">return</span> <a class="code " href="structNothing.html">Nothing</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"><a class="line" href="namespaceos.html#accb0757a8d9eca48dd31c4c433d17cfd"> 220</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespaceos.html#accb0757a8d9eca48dd31c4c433d17cfd">mknod</a>(</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keyword">const</span> std::string& <a class="code" href="namespacepath.html">path</a>,</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#a8a35dd1 207a16dfa8b1d4163176d828c">mode_t</a> <a class="code" href="namespaceos_1_1stat.html#afc51654ad486693167c300612bf8ebfa">mode</a>,</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  dev_t <a class="code" href="namespaceos_1_1stat.html#a083c9ff4aefeba1a75a27e6a6d6e2a71">dev</a>)</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> {</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">if</span> (::<a class="code" href="namespaceos.html#accb0757a8d9eca48dd31c4c433d17cfd">mknod</a>(path.c_str(), <a class="code" href="namespaceos_1_1stat.html#afc51654ad486693167c300612bf8ebfa">mode</a>, <a class="code" href="namespaceos_1_1stat.html#a083c9ff4aefeba1a75a27e6a6d6e2a71">dev</a>) < 0) {</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</ a>();</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  }</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> }</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment">// Suspends execution for the given duration.</span></div><div class="line"><a name="l00234"></a><span class="lineno"><a class="line" href="namespaceos.html#ab2b826c68a25af9e9ef47c570c36e137"> 234</a></span> <span class="keyword">inline</span> <a class="code" href="classTry .html">Try<Nothing></a> <a class="code" href="namespaceos.html#ab2b826c68a25af9e9ef47c570c36e137">sleep</a>(<span class="keyword">const</span> <a class="code" href="classDuration.html">Duration</a>& duration)</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> {</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  timespec remaining;</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  remaining.tv_sec = <span class="keyword">static_cast<</span><span class="keywordtype">long</span><span class="keyword">></span>(duration.<a class="code" href="classDuration.html#a31ebb8d92dc93914cb830d70753d802b">secs</a>());</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  remaining.tv_nsec =</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keyword">static_cast<</span><span class="keywordtype">long</spa n><span class="keyword">></span>((duration - <a class="code" href="classSeconds.html">Seconds</a>(remaining.tv_sec)).<a class="code" href="namespacens.html">ns</a>());</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordflow">while</span> (nanosleep(&remaining, &remaining) == -1) {</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">if</span> (errno == EINTR) {</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoEr ror.html">ErrnoError</a>();</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  }</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</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> </div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment">// Returns the list of files that match the given (shell) pattern.</span></div><div class="line"><a name="l00254"></a><span class="lineno"><a class="line" href="namespac eos.html#a781ae694650dd3c6addab2a383a8c422"> 254</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<std::list<std::string></a>> <a class="code" href="namespaceos.html#a781ae694650dd3c6addab2a383a8c422">glob</a>(<span class="keyword">const</span> std::string& pattern)</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>  glob_t g;</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordtype">int</span> <a class="code" href="namespaceproc.html#a34396c6140a28f583dc13fee3c3c35d4">status</a> = <a class="code" href="namespaceos.html#a781ae694650dd3c6addab2a383a8c422">::glob</a>(pattern.c_str(), GLOB_NOSORT, <span class="keyword">nullptr</span>, &g);</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div><div class="line"><a name="l 00259"></a><span class="lineno"> 259</span>  std::list<std::string> result;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">if</span> (status != 0) {</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">if</span> (status == GLOB_NOMATCH) {</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">return</span> result; <span class="comment">// Empty list.</span></div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l002 66"></a><span class="lineno"> 266</span>  }</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> </div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < g.gl_pathc; ++i) {</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  result.push_back(g.gl_pathv[i]);</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> </div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  globfree(&g); <span class="comment">// Best-effort free of dynamically allocated memory.</span></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div><div class=" line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span> }</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="comment">// Returns the total number of cpus (cores).</span></div><div class="line"><a name="l00280"></a><span class="lineno"><a class="line" href="namespaceos.html#afd08813156fea899c86b340d9767a8cd"> 280</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<long></a> <a class="code" href="namespaceos.html#afd08813156fea899c86b340d9767a8cd">cpus</a>()</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> {</div><div class="line"><a name="l00282"></a><sp an class="lineno"> 282</span>  <span class="keywordtype">long</span> <a class="code" href="namespaceos.html#afd08813156fea899c86b340d9767a8cd">cpus</a> = sysconf(_SC_NPROCESSORS_ONLN);</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (cpus < 0) {</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</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>  <span class="keywordflow">return</span> <a class="code" href="namespaceos.html#afd08813156fea899c86b340d9767a8cd">cpus</a>;</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> }</div><div clas s="line"><a name="l00289"></a><span class="lineno"> 289</span> </div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> </div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="comment">// Returns load struct with average system loads for the last</span></div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment">// 1, 5 and 15 minutes respectively.</span></div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment">// Load values should be interpreted as usual average loads from</span></div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="comment">// uptime(1).</span></div><div class="line"><a name="l00295"></a><span class="lineno"><a class="line" href="namespaceos.html#ad932e3876b339c61b03abc575ad3943b"> 295</a></span> <span class="keyword">inline</span> <a class="code" href ="classTry.html">Try<Load></a> <a class="code" href="namespaceos.html#ad932e3876b339c61b03abc575ad3943b">loadavg</a>()</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span> {</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordtype">double</span> loadArray[3];</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">if</span> (getloadavg(loadArray, 3) == -1) {</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>(<span class="stringliteral">"Failed to determine system load averages"</span>);</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  }</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div><div class="line"><a name="l00302"></a>< span class="lineno"> 302</span>  <a class="code" href="structos_1_1Load.html">Load</a> load;</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  load.<a class="code" href="structos_1_1Load.html#ac65d8819bbf8201cfa6975d853061e93">one</a> = loadArray[0];</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  load.<a class="code" href="structos_1_1Load.html#acff27912cf063f465aaf72fbda6ad3a7">five</a> = loadArray[1];</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  load.<a class="code" href="structos_1_1Load.html#ac4a959c47204e8cd9e67930ac6b9bb63">fifteen</a> = loadArray[2];</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="keywordflow">return</span> load;</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span> }</div><div cla ss="line"><a name="l00309"></a><span class="lineno"> 309</span> </div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> </div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span> <span class="comment">// Return the system information.</span></div><div class="line"><a name="l00312"></a><span class="lineno"><a class="line" href="namespaceos.html#afc96a896b632cb0942b317a1f8543919"> 312</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<UTSInfo></a> <a class="code" href="namespaceos.html#afc96a896b632cb0942b317a1f8543919">uname</a>()</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span> {</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keyword">struct </span>utsname name;</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> (::<a class="code" href="namespaceos.html#afc96a896b632cb0942b317a1f8543919">uname</a>(&name) < 0) {</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  }</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <a class="code" href="structos_1_1UTSInfo.html">UTSInfo</a> info;</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  info.<a class="code" href="structos_1_1UTSInfo.html#a6d960255088be07cac7157b7cbe94cbf">sysname</a> = name.sysname;</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  info.<a class="code" href="structos_1_1UTSInfo.html#a03dd23e9031a68b633dc6e405e32bab0">nodename</a> = name.nodename;</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  info.<a class="code" href="structos_1_1UTSInfo.html#aea5e6121d79c970b5abe84d9e2736663">release</a> = name.release;</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  info.<a class="code" href="structos_1_1UTSInfo.html#a0abdea1c2c12389c3413c006a186b0a4">version</a> = name.version;</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  info.<a class="code" href="structos_1_1UTSInfo.html#a493fadfa45429ab755d01d02d2f8be17">machine</a> = name.machine;</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordflow">return</span> info;</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="comment">// Overload of os::pids for filtering by groups and sessions.</span></div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="comment">// A group / session id of 0 will fitler on the group / session ID</span></div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="comment">// of the calling process.</span></div><div class="line"><a name="l00333"></a><span class="lineno"><a class="line" href="namespaceos.html#abdecf7ea8278e2d8b2110ecd2e8ca0ec"> 333</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<std::set<pid_t></a>> <a class="code" href="namespaceos.html#a42af1cab63434cedf2b698cd6f49f073">pids</a>(<a class="code" href="classOption.html">Option<pid_t></a> <a c lass="code" href="structgroup.html">group</a>, <a class="code" href="classOption.html">Option<pid_t></a> session)</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">if</span> (group.<a class="code" href="classOption.html#a06eab791122ebc1f8af4ad310e5e7d7e">isNone</a>() && session.<a class="code" href="classOption.html#a06eab791122ebc1f8af4ad310e5e7d7e">isNone</a>()) {</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceos.html#a42af1cab63434cedf2b698cd6f49f073">os::pids</a>();</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (group.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a >() && group.<a class="code" >href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() < 0) >{</div><div class="line"><a name="l00338"></a><span class="lineno"> >338</span>  <span class="keywordflow">return</span> <a class="code" >href="classError.html">Error</a>(<span class="stringliteral">"Invalid >group"</span>);</div><div class="line"><a name="l00339"></a><span >class="lineno"> 339</span>  } <span class="keywordflow">else</span> ><span class="keywordflow">if</span> (session.<a class="code" >href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() >&& session.<a class="code" >href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() < 0) >{</div><div class="line"><a name="l00340"></a><span class="lineno"> >340</span>  <span class="keywordflow">return</span> <a class="code" >href="classError.html">Error</a>(<span class="stringliteral">"Invalid >session"</span>);</div><div class="line"><a name=" l00341"></a><span class="lineno"> 341</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">const</span> <a class="code" href="classTry.html">Try<std::list<Process></a>> <a class="code" href="namespaceos.html#aa98ca8ac255e2b9c689979a1b40084d3">processes</a> = <a class="code" href="namespaceos.html#aa98ca8ac255e2b9c689979a1b40084d3">os::processes</a>();</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">if</span> (processes.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error< /a>(processes.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  }</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> </div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="comment">// Obtain the calling process group / session ID when 0 is provided.</span></div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordflow">if</span> (group.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() && group.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() == 0) {</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  group = getpgid(0);</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  }</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">if</span> (session.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() && session.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() == 0) {</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  session = getsid(0);</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> </div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  std::set<pid_t> result;</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">foreach</span> (<span class="keyword">const</span> <a class="code" href="structos_1_1Process.html">Process</a>& <a class="code" href="namespaceprocess.html">process</a>, processes.<a cla ss="code" href="classTry.html#a8bc7f43e75a47111ea18e9c83b007be5">get</a>()) {</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="comment">// Group AND Session (intersection).</span></div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span> (group.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() && session.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>()) {</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordflow">if</span> (group.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() == process.<a class="code" href="structos_1_1Process.html#a41f9befab165fd224ba2d829e7c35ba6">group</a> &&</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  process.<a class= "code" href="structos_1_1Process.html#a688cf2d2f64d48fc510aa78a952c5ad4">session</a>.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() &&</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  session.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() == process.<a class="code" href="structos_1_1Process.html#a688cf2d2f64d48fc510aa78a952c5ad4">session</a>.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>()) {</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  result.insert(process.<a class="code" href="structos_1_1Process.html#a8c68e0a8c8693f2acacf0f428ea0a493">pid</a>);</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  }</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  } <span class="keywordflow">else</span> <span class="k eywordflow">if</span> (group.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() && group.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() == process.<a class="code" href="structos_1_1Process.html#a41f9befab165fd224ba2d829e7c35ba6">group</a>) {</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  result.insert(process.<a class="code" href="structos_1_1Process.html#a8c68e0a8c8693f2acacf0f428ea0a493">pid</a>);</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (session.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() && process.<a class="code" href="structos_1_1Process.html#a688cf2d2f64d48fc510aa78a952c5ad4">session</a>.<a class="code" href="classOption.html#a4e3bf8416d95246f43c91f1b5c309323">isSome</a>() &&</ div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  session.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>() == process.<a class="code" href="structos_1_1Process.html#a688cf2d2f64d48fc510aa78a952c5ad4">session</a>.<a class="code" href="classOption.html#a21358442c0fac1cc978a67a9a9089a79">get</a>()) {</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  result.insert(process.<a class="code" href="structos_1_1Process.html#a8c68e0a8c8693f2acacf0f428ea0a493">pid</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>  }</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="keywordflow">return</span> result;</div><div class="lin e"><a name="l00375"></a><span class="lineno"> 375</span> }</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span> </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="comment">// Creates a tar 'archive' with gzip compression, of the given 'path'.</span></div><div class="line"><a name="l00379"></a><span class="lineno"><a class="line" href="namespaceos.html#a30f836264363d7d7f0578fd0fb98ee36"> 379</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespaceos.html#a30f836264363d7d7f0578fd0fb98ee36">tar</a>(<span class="keyword">const</span> std::string& <a class="code" href="namespacepath.html">path</a>, <span class="keyword">const</span> std::string& archive)</div><div class="line"><a name="l00380"></a><span class="line no"> 380</span> {</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <a class="code" href="classTry.html">Try<std::string></a> tarOut =</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <a class="code" href="namespaceos.html#a0d86320d7799ea761599bc356c02a4fa">os::shell</a>(<span class="stringliteral">"tar %s %s %s"</span>, <span class="stringliteral">"-czf"</span>, archive.c_str(), path.c_str());</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>  <span class="keywordflow">if</span> (tarOut.<a class="code" href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) {</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stri ngliteral">"Failed to archive "</span> + path + <span class="stringliteral">": "</span> + tarOut.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  }</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="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span> }</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 OS release numbers.</span></div><div class="line"><a name="l00393"></a ><span class="lineno"><a class="line" >href="namespaceos.html#a079aa1b108c567735620a14ea2a2e506"> >393</a></span> <span class="keyword">inline</span> <a class="code" >href="classTry.html">Try<Version></a> <a class="code" >href="namespaceos.html#a079aa1b108c567735620a14ea2a2e506">release</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>  <a class="code" >href="classTry.html">Try<UTSInfo></a> info = <a class="code" >href="namespaceos.html#afc96a896b632cb0942b317a1f8543919">uname</a>();</div><div > class="line"><a name="l00396"></a><span class="lineno"> 396</span>  ><span class="keywordflow">if</span> (info.<a class="code" >href="classTry.html#a0b98f95163b8a38daafd1651b043a276">isError</a>()) >{</div><div class="line"><a name="l00397"></a><span class="lineno"> >397</span>  <span class="keywordflow">return</span> <a class="code" >href="classEr ror.html">Error</a>(info.<a class="code" href="classTry.html#aec4a11ddd3c036e889d90b7eb6258ba7">error</a>());</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  }</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span> </div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keywordtype">int</span> major, minor, <a class="code" href="namespacesvn.html#a018bb955e273aa2e6b6c950005ed6048">patch</a> = 0;</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="preprocessor">#ifndef __FreeBSD__</span></div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="comment">// TODO(karya): Replace sscanf with Version::parse() once Version</span></div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="comment">// starts supporting labels and build metadata.</span></div><div c lass="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">if</span> (::sscanf(</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  info-><a class="code" href="structos_1_1UTSInfo.html#aea5e6121d79c970b5abe84d9e2736663">release</a>.c_str(),</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="stringliteral">"%d.%d.%d"</span>,</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  &major,</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  &minor,</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  &<a class="code" href="namespacesvn.html#a018bb955e273aa2e6b6c950005ed6048">patch</a>) != 3) {</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordflow">return </span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to parse: "</span> + info-><a class="code" href="structos_1_1UTSInfo.html#aea5e6121d79c970b5abe84d9e2736663">release</a>);</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="preprocessor">#else</span></div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="comment">// TODO(dforsyth): Handle FreeBSD patch versions (-pX).</span></div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <span class="keywordflow">if</span> (::sscanf(info-><a class="code" href="structos_1_1UTSInfo.html#aea5e6121d79c970b5abe84d9e2736663">release</a>.c_str(), <span class="stringliteral">"%d.%d-%*s"</span>, &major, &minor) != 2) {</div><div class="line"><a name="l00415"></a><span class ="lineno"> 415</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to parse: "</span> + info-><a class="code" href="structos_1_1UTSInfo.html#aea5e6121d79c970b5abe84d9e2736663">release</a>);</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  }</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordflow">return</span> <a class="code" href="structVersion.html">Version</a>(major, minor, patch);</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> </div><div class="line"><a name="l00422" ></a><span class="lineno"><a class="line" >href="namespaceos.html#a547f04b42e472b2ff0070897010fac78"> >422</a></span> <span class="keyword">inline</span> <a class="code" >href="classTry.html">Try<std::string></a> <a class="code" >href="namespaceos.html#a547f04b42e472b2ff0070897010fac78">var</a>()</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="keywordflow">return</span> ><span class="stringliteral">"/var"</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> </div><div class="line"><a >name="l00427"></a><span class="lineno"> 427</span> </div><div >class="line"><a name="l00428"></a><span class="lineno"><a class="line" >href="namespaceos.html#a54f3320a4d6f88c14f80f5247aa879b9"> >428</a></span> <span class="k eyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespaceos.html#a54f3320a4d6f88c14f80f5247aa879b9">dup2</a>(<span class="keywordtype">int</span> oldFd, <span class="keywordtype">int</span> newFd)</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span> {</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordflow">while</span> (::<a class="code" href="namespaceos.html#a54f3320a4d6f88c14f80f5247aa879b9">dup2</a>(oldFd, newFd) == -1) {</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keywordflow">if</span> (errno == EINTR) {</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  } <span class="keywordflow">else</span> {</div><div class="line"> <a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</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>  }</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span> }</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> </div><div class="line"><a name="l00441"></a><span class="lineno"><a class="line" href="namespaceos.html#a07a766e0355221b949e5fe6fdfca63f2"> 441</a></span> <span class="keyword">inline</span> <a class="code" href= "classTry.html">Try<std::string></a> <a class="code" href="namespaceos.html#a07a766e0355221b949e5fe6fdfca63f2">ptsname</a>(<span class="keywordtype">int</span> <a class="code" href="namespacemesos_1_1v1_1_1master.html">master</a>)</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span> {</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="comment">// 'ptsname' is not thread safe. Therefore, we use mutex here to</span></div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="comment">// make this method thread safe.</span></div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="comment">// TODO(jieyu): Consider using ptsname_r for linux.</span></div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keyword">static</span> std::mutex* mutex = <span class="keyword">new</span> s td::mutex;</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>  <span class="keyword">synchronized</span> (mutex) {</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="keyword">const</span> <span class="keywordtype">char</span>* slavePath = <a class="code" href="namespaceos.html#a07a766e0355221b949e5fe6fdfca63f2">::ptsname</a>(master);</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  <span class="keywordflow">if</span> (slavePath == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  }</div><div class="line"><a name="l00453 "></a><span class="lineno"> 453</span>  <span class="keywordflow">return</span> slavePath;</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  }</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span> }</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span> </div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span> </div><div class="line"><a name="l00458"></a><span class="lineno"><a class="line" href="namespaceos.html#a2cc6177f60b8bd36990aab876a3c3c3f"> 458</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespaceos.html#a2cc6177f60b8bd36990aab876a3c3c3f">setctty</a>(<span class="keywordtype">int</span> fd)</div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span> {</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <sp an class="keywordflow">if</span> (ioctl(fd, TIOCSCTTY, <span class="keyword">nullptr</span>) == -1) {</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</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> </div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span> }</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span> </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> <span class="comm ent">// Update the window size for</span></div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span> <span class="comment">// the terminal represented by fd.</span></div><div class="line"><a name="l00470"></a><span class="lineno"><a class="line" href="namespaceos.html#a788e763662cf01a30bcd06baa95332bb"> 470</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<Nothing></a> <a class="code" href="namespaceos.html#a788e763662cf01a30bcd06baa95332bb">setWindowSize</a>(</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keywordtype">int</span> fd,</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> rows,</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">s hort</span> columns)</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span> {</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  <span class="keyword">struct </span>winsize winsize;</div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  winsize.ws_row = rows;</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  winsize.ws_col = columns;</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>  <span class="keywordflow">if</span> (ioctl(fd, TIOCSWINSZ, &winsize) != 0) {</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  }</div><di v class="line"><a name="l00482"></a><span class="lineno"> 482</span> </div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="keywordflow">return</span> <a class="code" href="structNothing.html">Nothing</a>();</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> </div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span> </div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="comment">// Returns a host-specific default for the `PATH` environment variable, based</span></div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="comment">// on the configuration of the host.</span></div><div class="line"><a name="l00489"></a><span class="lineno"><a class="line" href="namespaceos.html#a05476e646f895fd2f27f0e449f86ff63"> 489</a ></span> <span class="keyword">inline</span> std::string <a class="code" >href="namespaceos.html#a05476e646f895fd2f27f0e449f86ff63">host_default_path</a>()</div><div > class="line"><a name="l00490"></a><span class="lineno"> >490</span> {</div><div class="line"><a name="l00491"></a><span >class="lineno"> 491</span>  <span class="keywordflow">return</span> ><span >class="stringliteral">"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"</span>;</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> </div><div class="line"><a >name="l00494"></a><span class="lineno"> 494</span> } <span >class="comment">// namespace os {</span></div><div class="line"><a >name="l00495"></a><span class="lineno"> 495</span> </div><div >class="line"><a name="l00496"></a><span class="lineno"> >496</span> <span class="preprocessor">#endif // __STOUT_POSIX _OS_HPP__</span></div><div class="ttc" id="namespaceos_html_a54f3320a4d6f88c14f80f5247aa879b9"><div class="ttname"><a href="namespaceos.html#a54f3320a4d6f88c14f80f5247aa879b9">os::dup2</a></div><div class="ttdeci">Try< Nothing > dup2(int oldFd, int newFd)</div><div class="ttdef"><b>Definition:</b> os.hpp:428</div></div> +<a href="posix_2os_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">//</sp an></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 class="l ine"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef __STOUT_POSIX_OS_HPP__</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define __STOUT_POSIX_OS_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 <errno.h></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#ifdef __sun</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <sys/loadavg.h></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#define dirfd(dir) ((dir)->d_fd)</span></div><div class="line"><a name="l00020"></a><span class="linen o"> 20</span> <span class="preprocessor">#ifndef NAME_MAX</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define NAME_MAX MAXNAMLEN</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#endif // NAME_MAX</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <fts.h></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#endif // __sun</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <glob.h></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor ">#include <grp.h></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <limits.h></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <netdb.h></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <pwd.h></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <signal.h></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <stddef.h></span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <stdio.h></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#i nclude <stdlib.h></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <unistd.h></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <utime.h></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="preprocessor">#include <sys/ioctl.h></span></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="preprocessor">#ifdef __linux__</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <linux/version.h></span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="preprocessor">#include <sys/sysinfo.h></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#endif // __linux__</span></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> <span class="preprocessor">#include <sys/ioctl.h></span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include <sys/utsname.h></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#include <sys/wait.h></span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include <list></span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include <map></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#include <mutex></span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#include <set></span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#include <<a class="code" href
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