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<li class="navelem"><a class="el" href="dir_0df11c8132d7ff4583cd88fdf05fcdad.html">fuse-3.10.5</a></li><li class="navelem"><a class="el" href="dir_4f98e1cf4c010344780243c8e98a5c27.html">example</a></li> </ul>
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<div class="title">passthrough_helpers.h</div> </div>
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<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"> * FUSE: Filesystem in Userspace</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * modification, are permitted provided that the following conditions</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * are met:</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * notice, this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * notice, this list of conditions and the following disclaimer in the</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * documentation and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * SUCH DAMAGE</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> */</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"> 26</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * Creates files on the underlying file system in response to a FUSE_MKNOD</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * operation</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">static</span> <span class="keywordtype">int</span> mknod_wrapper(<span class="keywordtype">int</span> dirfd, <span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keyword">const</span> <span class="keywordtype">char</span> *link,</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keywordtype">int</span> mode, dev_t rdev)</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="keywordtype">int</span> res;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">if</span> (S_ISREG(mode)) {</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  res = openat(dirfd, path, O_CREAT | O_EXCL | O_WRONLY, mode);</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">if</span> (res >= 0)</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  res = close(res);</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (S_ISDIR(mode)) {</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  res = mkdirat(dirfd, path, mode);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (S_ISLNK(mode) && link != NULL) {</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  res = symlinkat(link, dirfd, path);</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (S_ISFIFO(mode)) {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  res = mkfifoat(dirfd, path, mode);</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#ifdef __FreeBSD__</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (S_ISSOCK(mode)) {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keyword">struct </span>sockaddr_un su;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">int</span> fd;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">if</span> (strlen(path) >= <span class="keyword">sizeof</span>(su.sun_path)) {</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  errno = ENAMETOOLONG;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">return</span> -1;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  }</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  fd = socket(AF_UNIX, SOCK_STREAM, 0);</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">if</span> (fd >= 0) {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * We must bind the socket to the underlying file</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * system to create the socket file, even though</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * we'll never listen on this socket.</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  su.sun_family = AF_UNIX;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  strncpy(su.sun_path, path, <span class="keyword">sizeof</span>(su.sun_path));</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  res = bindat(dirfd, fd, (<span class="keyword">struct</span> sockaddr*)&su,</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">sizeof</span>(su));</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">if</span> (res == 0)</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  close(fd);</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  res = -1;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  res = mknodat(dirfd, path, mode, rdev);</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>  </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> res;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }</div>
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