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| <div class="title">exists.hpp</div> </div> |
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| <a href="posix_2exists_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 class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef __STOUT_OS_POSIX_EXISTS_HPP__</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor"></span><span class="preprocessor">#define __STOUT_OS_POSIX_EXISTS_HPP__</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor"></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">#include <signal.h></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 <sys/stat.h></span></div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <string></span></div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">namespace </span>os {</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> </div> |
| <div class="line"><a name="l00026"></a><span class="lineno"><a class="line" href="namespaceos.html#a69b3969276ffa4cb698b9431ee43bd7c"> 26</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="namespaceos.html#a69b3969276ffa4cb698b9431ee43bd7c">exists</a>(<span class="keyword">const</span> std::string& path)</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> {</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keyword">struct </span><a class="code" href="namespacecgroups.html#a78e3c7ca2e422779908eec45f859d757">stat</a> s;</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordflow">if</span> (::lstat(path.c_str(), &s) < 0) {</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div 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="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> }</div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">// Determine if the process identified by pid exists.</span></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">// NOTE: Zombie processes have a pid and therefore exist. See os::process(pid)</span></div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// to get details of a process.</span></div> |
| <div class="line"><a name="l00040"></a><span class="lineno"><a class="line" href="namespaceos.html#a066345498343ec3c98e6493638b9ed50"> 40</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="namespaceos.html#a69b3969276ffa4cb698b9431ee43bd7c">exists</a>(<a class="code" href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a> pid)</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> {</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// The special signal 0 is used to check if the process exists; see kill(2).</span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// If the current user does not have permission to signal pid, but it does</span></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">// exist, then ::kill will return -1 and set errno == EPERM.</span></div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">if</span> (::<a class="code" href="namespaceos.html#a45423d28aabced8c82165ee906930732">kill</a>(pid, 0) == 0 || errno == EPERM) {</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">return</span> <span class="keyword">true</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> </div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> }</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> } <span class="comment">// namespace os {</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="preprocessor">#endif // __STOUT_OS_POSIX_EXISTS_HPP__</span></div> |
| <div class="ttc" id="namespaceos_html_a69b3969276ffa4cb698b9431ee43bd7c"><div class="ttname"><a href="namespaceos.html#a69b3969276ffa4cb698b9431ee43bd7c">os::exists</a></div><div class="ttdeci">bool exists(const std::string &path)</div><div class="ttdef"><b>Definition:</b> exists.hpp:26</div></div> |
| <div class="ttc" id="3rdparty_2stout_2include_2stout_2windows_8hpp_html_ab03ced250ed239bc3b50b669493997f9"><div class="ttname"><a href="3rdparty_2stout_2include_2stout_2windows_8hpp.html#ab03ced250ed239bc3b50b669493997f9">pid_t</a></div><div class="ttdeci">DWORD pid_t</div><div class="ttdef"><b>Definition:</b> windows.hpp:170</div></div> |
| <div class="ttc" id="namespacecgroups_html_a78e3c7ca2e422779908eec45f859d757"><div class="ttname"><a href="namespacecgroups.html#a78e3c7ca2e422779908eec45f859d757">cgroups::stat</a></div><div class="ttdeci">Try< hashmap< std::string, uint64_t > > stat(const std::string &hierarchy, const std::string &cgroup, const std::string &file)</div></div> |
| <div class="ttc" id="namespaceos_html_a45423d28aabced8c82165ee906930732"><div class="ttname"><a href="namespaceos.html#a45423d28aabced8c82165ee906930732">os::kill</a></div><div class="ttdeci">int kill(pid_t pid, int sig)</div><div class="ttdef"><b>Definition:</b> kill.hpp:21</div></div> |
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