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<div class="title">kern_pipe.c</div> </div>
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<a href="../../d6/dba/kern__pipe_8c.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">/*-</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2002-2018 The UbixOS Project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</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"> * This was developed by Christopher W. Olsen for the UbixOS Project.</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"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * provided that the following conditions are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1) Redistributions of source code must retain the above copyright notice, this list of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * conditions, the following disclaimer and the list of authors.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * conditions, the following disclaimer and the list of authors in the documentation and/or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * other materials provided with the distribution.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * endorse or promote products derived from this software without specific prior written</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * permission.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="../../db/dd5/thread_8h.html">sys/thread.h</a>></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="../../d3/d7e/sysproto__posix_8h.html">sys/sysproto_posix.h</a>></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="../../da/d3e/pipe_8h.html">sys/pipe.h</a>></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <<a class="code" href="../../d3/df4/descrip_8h.html">sys/descrip.h</a>></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="code" href="../../dd/d78/video_8h.html">sys/video.h</a>></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="../../da/d66/string_8h.html">string.h</a>></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="../../d6/dba/kern__pipe_8c.html#ab6accb21879bf318f953d5e4124db685"> 36</a></span> <span class="keywordtype">int</span> <a class="code" href="../../d6/dba/kern__pipe_8c.html#ab6accb21879bf318f953d5e4124db685">sys_pipe2</a>(<span class="keyword">struct</span> <a class="code" href="../../d3/dc5/structthread.html">thread</a> *thr, <span class="keyword">struct</span> <a class="code" href="../../d3/d36/structsys__pipe2__args.html">sys_pipe2_args</a> *args) {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordtype">int</span> error = 0x0;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  </div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordtype">int</span> fd1 = 0x0;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keywordtype">int</span> fd2 = 0x0;</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="keyword">struct </span><a class="code" href="../../d7/d3a/structfile.html">file</a> *nfp1 = 0x0;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">struct </span><a class="code" href="../../d7/d3a/structfile.html">file</a> *nfp2 = 0x0;</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="keyword">struct </span><a class="code" href="../../da/da9/structpipeInfo.html">pipeInfo</a> *pipeDesc = <a class="code" href="../../d4/d03/kmalloc_8h.html#a150eab2ac4ce4553e21ca10e7f441762">kmalloc</a>(<span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="../../da/da9/structpipeInfo.html">pipeInfo</a>));</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <a class="code" href="../../da/d66/string_8h.html#ace4b911463887af5e748326323e99a23">memset</a>(pipeDesc, 0x0, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="../../da/da9/structpipeInfo.html">pipeInfo</a>));</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>  error = <a class="code" href="../../d3/df4/descrip_8h.html#a434fb15226182b0ee879a5afe9a8c190">falloc</a>(thr, &nfp1, &fd1);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  error = <a class="code" href="../../d3/df4/descrip_8h.html#a434fb15226182b0ee879a5afe9a8c190">falloc</a>(thr, &nfp2, &fd2);</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>  nfp1-><a class="code" href="../../d7/d3a/structfile.html#adfb0c6311589d1d62b720c9610430ad0">data</a> = pipeDesc;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  nfp2-><a class="code" href="../../d7/d3a/structfile.html#adfb0c6311589d1d62b720c9610430ad0">data</a> = pipeDesc;</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>  nfp1-><a class="code" href="../../d7/d3a/structfile.html#ac43cc1da8bee1eb339249ad88518f769">fd_type</a> = 3;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  nfp2-><a class="code" href="../../d7/d3a/structfile.html#ac43cc1da8bee1eb339249ad88518f769">fd_type</a> = 3;</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>  pipeDesc-><a class="code" href="../../da/da9/structpipeInfo.html#a7b8ab29519bbfd2a4f319bb08b13d999">rFD</a> = fd1;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  pipeDesc-><a class="code" href="../../da/da9/structpipeInfo.html#ad1f25bacb95bd28fd47a62b648dbd125">rfdCNT</a> = 2;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  pipeDesc-><a class="code" href="../../da/da9/structpipeInfo.html#ab3c324342452efcb74529c9c830d708b">wFD</a> = fd2;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  pipeDesc-><a class="code" href="../../da/da9/structpipeInfo.html#a73534b061097015a340b287279fe52ed">wfdCNT</a> = 2;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  args-><a class="code" href="../../d3/d36/structsys__pipe2__args.html#a7cd3e1a28b459403e1f2419ef5476f8c">fildes</a>[0] = fd1;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  args-><a class="code" href="../../d3/d36/structsys__pipe2__args.html#a7cd3e1a28b459403e1f2419ef5476f8c">fildes</a>[1] = fd2;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  thr-><a class="code" href="../../d3/dc5/structthread.html#af3ec0788a84e5cb640a1646d1347998a">td_retval</a>[0] = 0;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> (0x0);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> }</div>
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<div class="ttc" id="astructsys__pipe2__args_html"><div class="ttname"><a href="../../d3/d36/structsys__pipe2__args.html">sys_pipe2_args</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d7e/sysproto__posix_8h_source.html#l00757">sysproto_posix.h:757</a></div></div>
<div class="ttc" id="akern__pipe_8c_html_ab6accb21879bf318f953d5e4124db685"><div class="ttname"><a href="../../d6/dba/kern__pipe_8c.html#ab6accb21879bf318f953d5e4124db685">sys_pipe2</a></div><div class="ttdeci">int sys_pipe2(struct thread *thr, struct sys_pipe2_args *args)</div><div class="ttdef"><b>Definition:</b> <a href="../../d6/dba/kern__pipe_8c_source.html#l00036">kern_pipe.c:36</a></div></div>
<div class="ttc" id="astructsys__pipe2__args_html_a7cd3e1a28b459403e1f2419ef5476f8c"><div class="ttname"><a href="../../d3/d36/structsys__pipe2__args.html#a7cd3e1a28b459403e1f2419ef5476f8c">sys_pipe2_args::fildes</a></div><div class="ttdeci">int * fildes</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d7e/sysproto__posix_8h_source.html#l00759">sysproto_posix.h:759</a></div></div>
<div class="ttc" id="astructfile_html_adfb0c6311589d1d62b720c9610430ad0"><div class="ttname"><a href="../../d7/d3a/structfile.html#adfb0c6311589d1d62b720c9610430ad0">file::data</a></div><div class="ttdeci">void * data</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/df4/descrip_8h_source.html#l00074">descrip.h:74</a></div></div>
<div class="ttc" id="astring_8h_html"><div class="ttname"><a href="../../da/d66/string_8h.html">string.h</a></div></div>
<div class="ttc" id="avideo_8h_html"><div class="ttname"><a href="../../dd/d78/video_8h.html">video.h</a></div></div>
<div class="ttc" id="asysproto__posix_8h_html"><div class="ttname"><a href="../../d3/d7e/sysproto__posix_8h.html">sysproto_posix.h</a></div></div>
<div class="ttc" id="astructfile_html"><div class="ttname"><a href="../../d7/d3a/structfile.html">file</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d3/df4/descrip_8h_source.html#l00067">descrip.h:67</a></div></div>
<div class="ttc" id="astructthread_html"><div class="ttname"><a href="../../d3/dc5/structthread.html">thread</a></div><div class="ttdef"><b>Definition:</b> <a href="../../db/dd5/thread_8h_source.html#l00040">thread.h:40</a></div></div>
<div class="ttc" id="astructpipeInfo_html_ad1f25bacb95bd28fd47a62b648dbd125"><div class="ttname"><a href="../../da/da9/structpipeInfo.html#ad1f25bacb95bd28fd47a62b648dbd125">pipeInfo::rfdCNT</a></div><div class="ttdeci">int rfdCNT</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d3e/pipe_8h_source.html#l00047">pipe.h:47</a></div></div>
<div class="ttc" id="adescrip_8h_html_a434fb15226182b0ee879a5afe9a8c190"><div class="ttname"><a href="../../d3/df4/descrip_8h.html#a434fb15226182b0ee879a5afe9a8c190">falloc</a></div><div class="ttdeci">int falloc(struct thread *, struct file **, int *)</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/d3f/descrip_8c_source.html#l00097">descrip.c:97</a></div></div>
<div class="ttc" id="astructfile_html_ac43cc1da8bee1eb339249ad88518f769"><div class="ttname"><a href="../../d7/d3a/structfile.html#ac43cc1da8bee1eb339249ad88518f769">file::fd_type</a></div><div class="ttdeci">int fd_type</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/df4/descrip_8h_source.html#l00072">descrip.h:72</a></div></div>
<div class="ttc" id="apipe_8h_html"><div class="ttname"><a href="../../da/d3e/pipe_8h.html">pipe.h</a></div></div>
<div class="ttc" id="astructpipeInfo_html_a7b8ab29519bbfd2a4f319bb08b13d999"><div class="ttname"><a href="../../da/da9/structpipeInfo.html#a7b8ab29519bbfd2a4f319bb08b13d999">pipeInfo::rFD</a></div><div class="ttdeci">int rFD</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d3e/pipe_8h_source.html#l00046">pipe.h:46</a></div></div>
<div class="ttc" id="astructthread_html_af3ec0788a84e5cb640a1646d1347998a"><div class="ttname"><a href="../../d3/dc5/structthread.html#af3ec0788a84e5cb640a1646d1347998a">thread::td_retval</a></div><div class="ttdeci">int td_retval[2]</div><div class="ttdef"><b>Definition:</b> <a href="../../db/dd5/thread_8h_source.html#l00041">thread.h:41</a></div></div>
<div class="ttc" id="astructpipeInfo_html_ab3c324342452efcb74529c9c830d708b"><div class="ttname"><a href="../../da/da9/structpipeInfo.html#ab3c324342452efcb74529c9c830d708b">pipeInfo::wFD</a></div><div class="ttdeci">int wFD</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d3e/pipe_8h_source.html#l00048">pipe.h:48</a></div></div>
<div class="ttc" id="akmalloc_8h_html_a150eab2ac4ce4553e21ca10e7f441762"><div class="ttname"><a href="../../d4/d03/kmalloc_8h.html#a150eab2ac4ce4553e21ca10e7f441762">kmalloc</a></div><div class="ttdeci">void * kmalloc(uInt32 len)</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d1a/kmalloc_8c_source.html#l00241">kmalloc.c:241</a></div></div>
<div class="ttc" id="adescrip_8h_html"><div class="ttname"><a href="../../d3/df4/descrip_8h.html">descrip.h</a></div></div>
<div class="ttc" id="astring_8h_html_ace4b911463887af5e748326323e99a23"><div class="ttname"><a href="../../da/d66/string_8h.html#ace4b911463887af5e748326323e99a23">memset</a></div><div class="ttdeci">void * memset(void *dst, int c, size_t length)</div></div>
<div class="ttc" id="astructpipeInfo_html"><div class="ttname"><a href="../../da/da9/structpipeInfo.html">pipeInfo</a></div><div class="ttdef"><b>Definition:</b> <a href="../../da/d3e/pipe_8h_source.html#l00045">pipe.h:45</a></div></div>
<div class="ttc" id="athread_8h_html"><div class="ttname"><a href="../../db/dd5/thread_8h.html">thread.h</a></div></div>
<div class="ttc" id="astructpipeInfo_html_a73534b061097015a340b287279fe52ed"><div class="ttname"><a href="../../da/da9/structpipeInfo.html#a73534b061097015a340b287279fe52ed">pipeInfo::wfdCNT</a></div><div class="ttdeci">int wfdCNT</div><div class="ttdef"><b>Definition:</b> <a href="../../da/d3e/pipe_8h_source.html#l00049">pipe.h:49</a></div></div>
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