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<div class="section" id="example-file-systems">
<span id="example-file-system"></span><h1>Example File Systems<a class="headerlink" href="#example-file-systems" title="Permalink to this headline">¶</a></h1>
<p>Python-LLFUSE comes with several example file systems in the
<code class="file docutils literal"><span class="pre">examples</span></code> directory of the release tarball. For completeness,
these examples are also included here.</p>
<div class="section" id="single-file-read-only-file-system">
<h2>Single-file, Read-only File System<a class="headerlink" href="#single-file-read-only-file-system" title="Permalink to this headline">¶</a></h2>
<p>(shipped as <code class="file docutils literal"><span class="pre">examples/lltest.py</span></code>)</p>
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157</pre></div></td><td class="code"><div class="highlight"><pre><span></span><span class="ch">#!/usr/bin/env python3</span>
<span class="c1"># -*- coding: utf-8 -*-</span>
<span class="sd">'''</span>
<span class="sd">lltest.py - Example file system for Python-LLFUSE.</span>
<span class="sd">This program presents a static file system containing a single file. It is</span>
<span class="sd">compatible with both Python 2.x and 3.x. Based on an example from Gerion Entrup.</span>
<span class="sd">Copyright © 2015 Nikolaus Rath <Nikolaus.org></span>
<span class="sd">Copyright © 2015 Gerion Entrup.</span>
<span class="sd">Permission is hereby granted, free of charge, to any person obtaining a copy of</span>
<span class="sd">this software and associated documentation files (the "Software"), to deal in</span>
<span class="sd">the Software without restriction, including without limitation the rights to</span>
<span class="sd">use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of</span>
<span class="sd">the Software, and to permit persons to whom the Software is furnished to do so.</span>
<span class="sd">THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span>
<span class="sd">IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS</span>
<span class="sd">FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR</span>
<span class="sd">COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER</span>
<span class="sd">IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN</span>
<span class="sd">CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
<span class="sd">'''</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">division</span><span class="p">,</span> <span class="n">print_function</span><span class="p">,</span> <span class="n">absolute_import</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="c1"># If we are running from the Python-LLFUSE source directory, try</span>
<span class="c1"># to load the module from there first.</span>
<span class="n">basedir</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">0</span><span class="p">]),</span> <span class="s1">'..'</span><span class="p">))</span>
<span class="k">if</span> <span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'setup.py'</span><span class="p">))</span> <span class="ow">and</span>
<span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'src'</span><span class="p">,</span> <span class="s1">'llfuse.pyx'</span><span class="p">))):</span>
<span class="n">sys</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'src'</span><span class="p">))</span>
<span class="kn">from</span> <span class="nn">argparse</span> <span class="kn">import</span> <span class="n">ArgumentParser</span>
<span class="kn">import</span> <span class="nn">stat</span>
<span class="kn">import</span> <span class="nn">logging</span>
<span class="kn">import</span> <span class="nn">errno</span>
<span class="kn">import</span> <span class="nn">llfuse</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">faulthandler</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">faulthandler</span><span class="o">.</span><span class="n">enable</span><span class="p">()</span>
<span class="n">log</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="vm">__name__</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">TestFs</span><span class="p">(</span><span class="n">llfuse</span><span class="o">.</span><span class="n">Operations</span><span class="p">):</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="nb">super</span><span class="p">(</span><span class="n">TestFs</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">hello_name</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">"message"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">hello_inode</span> <span class="o">=</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span><span class="o">+</span><span class="mi">1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">hello_data</span> <span class="o">=</span> <span class="sa">b</span><span class="s2">"hello world</span><span class="se">\n</span><span class="s2">"</span>
<span class="k">def</span> <span class="nf">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="n">entry</span> <span class="o">=</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">EntryAttributes</span><span class="p">()</span>
<span class="k">if</span> <span class="n">inode</span> <span class="o">==</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span><span class="p">:</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_mode</span> <span class="o">=</span> <span class="p">(</span><span class="n">stat</span><span class="o">.</span><span class="n">S_IFDIR</span> <span class="o">|</span> <span class="mi">0</span><span class="n">o755</span><span class="p">)</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_size</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">elif</span> <span class="n">inode</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">hello_inode</span><span class="p">:</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_mode</span> <span class="o">=</span> <span class="p">(</span><span class="n">stat</span><span class="o">.</span><span class="n">S_IFREG</span> <span class="o">|</span> <span class="mi">0</span><span class="n">o644</span><span class="p">)</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_size</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">hello_data</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">)</span>
<span class="n">stamp</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="mf">1438467123.985654</span> <span class="o">*</span> <span class="mf">1e9</span><span class="p">)</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_atime_ns</span> <span class="o">=</span> <span class="n">stamp</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_ctime_ns</span> <span class="o">=</span> <span class="n">stamp</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_mtime_ns</span> <span class="o">=</span> <span class="n">stamp</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_gid</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">getgid</span><span class="p">()</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_uid</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">getuid</span><span class="p">()</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_ino</span> <span class="o">=</span> <span class="n">inode</span>
<span class="k">return</span> <span class="n">entry</span>
<span class="k">def</span> <span class="nf">lookup</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">parent_inode</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">parent_inode</span> <span class="o">!=</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span> <span class="ow">or</span> <span class="n">name</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">hello_name</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">hello_inode</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">opendir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">if</span> <span class="n">inode</span> <span class="o">!=</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">)</span>
<span class="k">return</span> <span class="n">inode</span>
<span class="k">def</span> <span class="nf">readdir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fh</span><span class="p">,</span> <span class="n">off</span><span class="p">):</span>
<span class="k">assert</span> <span class="n">fh</span> <span class="o">==</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span>
<span class="c1"># only one entry</span>
<span class="k">if</span> <span class="n">off</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="k">yield</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">hello_name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">hello_inode</span><span class="p">),</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">flags</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">if</span> <span class="n">inode</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">hello_inode</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">)</span>
<span class="k">if</span> <span class="n">flags</span> <span class="o">&</span> <span class="n">os</span><span class="o">.</span><span class="n">O_RDWR</span> <span class="ow">or</span> <span class="n">flags</span> <span class="o">&</span> <span class="n">os</span><span class="o">.</span><span class="n">O_WRONLY</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">EPERM</span><span class="p">)</span>
<span class="k">return</span> <span class="n">inode</span>
<span class="k">def</span> <span class="nf">read</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fh</span><span class="p">,</span> <span class="n">off</span><span class="p">,</span> <span class="n">size</span><span class="p">):</span>
<span class="k">assert</span> <span class="n">fh</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">hello_inode</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">hello_data</span><span class="p">[</span><span class="n">off</span><span class="p">:</span><span class="n">off</span><span class="o">+</span><span class="n">size</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">init_logging</span><span class="p">(</span><span class="n">debug</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="n">formatter</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">Formatter</span><span class="p">(</span><span class="s1">'</span><span class="si">%(asctime)s</span><span class="s1">.</span><span class="si">%(msecs)03d</span><span class="s1"> </span><span class="si">%(threadName)s</span><span class="s1">: '</span>
<span class="s1">'[</span><span class="si">%(name)s</span><span class="s1">] </span><span class="si">%(message)s</span><span class="s1">'</span><span class="p">,</span> <span class="n">datefmt</span><span class="o">=</span><span class="s2">"%Y-%m-</span><span class="si">%d</span><span class="s2"> %H:%M:%S"</span><span class="p">)</span>
<span class="n">handler</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">StreamHandler</span><span class="p">()</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setFormatter</span><span class="p">(</span><span class="n">formatter</span><span class="p">)</span>
<span class="n">root_logger</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">()</span>
<span class="k">if</span> <span class="n">debug</span><span class="p">:</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">DEBUG</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">DEBUG</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">INFO</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">INFO</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">addHandler</span><span class="p">(</span><span class="n">handler</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">parse_args</span><span class="p">():</span>
<span class="sd">'''Parse command line'''</span>
<span class="n">parser</span> <span class="o">=</span> <span class="n">ArgumentParser</span><span class="p">()</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'mountpoint'</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">str</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Where to mount the file system'</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--debug'</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">'store_true'</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Enable debugging output'</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--debug-fuse'</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">'store_true'</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Enable FUSE debugging output'</span><span class="p">)</span>
<span class="k">return</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">main</span><span class="p">():</span>
<span class="n">options</span> <span class="o">=</span> <span class="n">parse_args</span><span class="p">()</span>
<span class="n">init_logging</span><span class="p">(</span><span class="n">options</span><span class="o">.</span><span class="n">debug</span><span class="p">)</span>
<span class="n">testfs</span> <span class="o">=</span> <span class="n">TestFs</span><span class="p">()</span>
<span class="n">fuse_options</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">llfuse</span><span class="o">.</span><span class="n">default_options</span><span class="p">)</span>
<span class="n">fuse_options</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">'fsname=lltest'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">options</span><span class="o">.</span><span class="n">debug_fuse</span><span class="p">:</span>
<span class="n">fuse_options</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">'debug'</span><span class="p">)</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">init</span><span class="p">(</span><span class="n">testfs</span><span class="p">,</span> <span class="n">options</span><span class="o">.</span><span class="n">mountpoint</span><span class="p">,</span> <span class="n">fuse_options</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">main</span><span class="p">(</span><span class="n">workers</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="k">except</span><span class="p">:</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">close</span><span class="p">(</span><span class="n">unmount</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">raise</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">'__main__'</span><span class="p">:</span>
<span class="n">main</span><span class="p">()</span>
</pre></div>
</td></tr></table></div>
</div>
<div class="section" id="in-memory-file-system">
<h2>In-memory File System<a class="headerlink" href="#in-memory-file-system" title="Permalink to this headline">¶</a></h2>
<p>(shipped as <code class="file docutils literal"><span class="pre">examples/tmpfs.py</span></code>)</p>
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453</pre></div></td><td class="code"><div class="highlight"><pre><span></span><span class="ch">#!/usr/bin/env python3</span>
<span class="c1"># -*- coding: utf-8 -*-</span>
<span class="sd">'''</span>
<span class="sd">tmpfs.py - Example file system for Python-LLFUSE.</span>
<span class="sd">This file system stores all data in memory. It is compatible with both Python</span>
<span class="sd">2.x and 3.x.</span>
<span class="sd">Copyright © 2013 Nikolaus Rath <Nikolaus.org></span>
<span class="sd">Permission is hereby granted, free of charge, to any person obtaining a copy of</span>
<span class="sd">this software and associated documentation files (the "Software"), to deal in</span>
<span class="sd">the Software without restriction, including without limitation the rights to</span>
<span class="sd">use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of</span>
<span class="sd">the Software, and to permit persons to whom the Software is furnished to do so.</span>
<span class="sd">THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span>
<span class="sd">IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS</span>
<span class="sd">FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR</span>
<span class="sd">COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER</span>
<span class="sd">IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN</span>
<span class="sd">CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
<span class="sd">'''</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">division</span><span class="p">,</span> <span class="n">print_function</span><span class="p">,</span> <span class="n">absolute_import</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="c1"># If we are running from the Python-LLFUSE source directory, try</span>
<span class="c1"># to load the module from there first.</span>
<span class="n">basedir</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">0</span><span class="p">]),</span> <span class="s1">'..'</span><span class="p">))</span>
<span class="k">if</span> <span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'setup.py'</span><span class="p">))</span> <span class="ow">and</span>
<span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'src'</span><span class="p">,</span> <span class="s1">'llfuse.pyx'</span><span class="p">))):</span>
<span class="n">sys</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'src'</span><span class="p">))</span>
<span class="kn">import</span> <span class="nn">llfuse</span>
<span class="kn">import</span> <span class="nn">errno</span>
<span class="kn">import</span> <span class="nn">stat</span>
<span class="kn">from</span> <span class="nn">time</span> <span class="kn">import</span> <span class="n">time</span>
<span class="kn">import</span> <span class="nn">sqlite3</span>
<span class="kn">import</span> <span class="nn">logging</span>
<span class="kn">from</span> <span class="nn">collections</span> <span class="kn">import</span> <span class="n">defaultdict</span>
<span class="kn">from</span> <span class="nn">llfuse</span> <span class="kn">import</span> <span class="n">FUSEError</span>
<span class="kn">from</span> <span class="nn">argparse</span> <span class="kn">import</span> <span class="n">ArgumentParser</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">faulthandler</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">faulthandler</span><span class="o">.</span><span class="n">enable</span><span class="p">()</span>
<span class="n">log</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">()</span>
<span class="c1"># For Python 2 + 3 compatibility</span>
<span class="k">if</span> <span class="n">sys</span><span class="o">.</span><span class="n">version_info</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="mi">2</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">next</span><span class="p">(</span><span class="n">it</span><span class="p">):</span>
<span class="k">return</span> <span class="n">it</span><span class="o">.</span><span class="n">next</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="nb">buffer</span> <span class="o">=</span> <span class="n">memoryview</span>
<span class="k">class</span> <span class="nc">Operations</span><span class="p">(</span><span class="n">llfuse</span><span class="o">.</span><span class="n">Operations</span><span class="p">):</span>
<span class="sd">'''An example filesystem that stores all data in memory</span>
<span class="sd"> This is a very simple implementation with terrible performance.</span>
<span class="sd"> Don't try to store significant amounts of data. Also, there are</span>
<span class="sd"> some other flaws that have not been fixed to keep the code easier</span>
<span class="sd"> to understand:</span>
<span class="sd"> * atime, mtime and ctime are not updated</span>
<span class="sd"> * generation numbers are not supported</span>
<span class="sd"> '''</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="nb">super</span><span class="p">(</span><span class="n">Operations</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">db</span> <span class="o">=</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">connect</span><span class="p">(</span><span class="s1">':memory:'</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">text_factory</span> <span class="o">=</span> <span class="nb">str</span>
<span class="bp">self</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">row_factory</span> <span class="o">=</span> <span class="n">sqlite3</span><span class="o">.</span><span class="n">Row</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">cursor</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">inode_open_count</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="nb">int</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">init_tables</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">init_tables</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">'''Initialize file system tables'''</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"""</span>
<span class="s2"> CREATE TABLE inodes (</span>
<span class="s2"> id INTEGER PRIMARY KEY,</span>
<span class="s2"> uid INT NOT NULL,</span>
<span class="s2"> gid INT NOT NULL,</span>
<span class="s2"> mode INT NOT NULL,</span>
<span class="s2"> mtime_ns INT NOT NULL,</span>
<span class="s2"> atime_ns INT NOT NULL,</span>
<span class="s2"> ctime_ns INT NOT NULL,</span>
<span class="s2"> target BLOB(256) ,</span>
<span class="s2"> size INT NOT NULL DEFAULT 0,</span>
<span class="s2"> rdev INT NOT NULL DEFAULT 0,</span>
<span class="s2"> data BLOB</span>
<span class="s2"> )</span>
<span class="s2"> """</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"""</span>
<span class="s2"> CREATE TABLE contents (</span>
<span class="s2"> rowid INTEGER PRIMARY KEY AUTOINCREMENT,</span>
<span class="s2"> name BLOB(256) NOT NULL,</span>
<span class="s2"> inode INT NOT NULL REFERENCES inodes(id),</span>
<span class="s2"> parent_inode INT NOT NULL REFERENCES inodes(id),</span>
<span class="s2"> UNIQUE (name, parent_inode)</span>
<span class="s2"> )"""</span><span class="p">)</span>
<span class="c1"># Insert root directory</span>
<span class="n">now_ns</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">time</span><span class="p">()</span> <span class="o">*</span> <span class="mf">1e9</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"INSERT INTO inodes (id,mode,uid,gid,mtime_ns,atime_ns,ctime_ns) "</span>
<span class="s2">"VALUES (?,?,?,?,?,?,?)"</span><span class="p">,</span>
<span class="p">(</span><span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span><span class="p">,</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IFDIR</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IRUSR</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IWUSR</span>
<span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IXUSR</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IRGRP</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IXGRP</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IROTH</span>
<span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IXOTH</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">getuid</span><span class="p">(),</span> <span class="n">os</span><span class="o">.</span><span class="n">getgid</span><span class="p">(),</span> <span class="n">now_ns</span><span class="p">,</span> <span class="n">now_ns</span><span class="p">,</span> <span class="n">now_ns</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"INSERT INTO contents (name, parent_inode, inode) VALUES (?,?,?)"</span><span class="p">,</span>
<span class="p">(</span><span class="sa">b</span><span class="s1">'..'</span><span class="p">,</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span><span class="p">,</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">get_row</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">a</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="o">*</span><span class="n">a</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">row</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">StopIteration</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">NoSuchRowError</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="nb">next</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">StopIteration</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">NoUniqueValueError</span><span class="p">()</span>
<span class="k">return</span> <span class="n">row</span>
<span class="k">def</span> <span class="nf">lookup</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="s1">'.'</span><span class="p">:</span>
<span class="n">inode</span> <span class="o">=</span> <span class="n">inode_p</span>
<span class="k">elif</span> <span class="n">name</span> <span class="o">==</span> <span class="s1">'..'</span><span class="p">:</span>
<span class="n">inode</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s2">"SELECT * FROM contents WHERE inode=?"</span><span class="p">,</span>
<span class="p">(</span><span class="n">inode_p</span><span class="p">,))[</span><span class="s1">'parent_inode'</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">inode</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s2">"SELECT * FROM contents WHERE name=? AND parent_inode=?"</span><span class="p">,</span>
<span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">))[</span><span class="s1">'inode'</span><span class="p">]</span>
<span class="k">except</span> <span class="n">NoSuchRowError</span><span class="p">:</span>
<span class="k">raise</span><span class="p">(</span><span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">))</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="n">row</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s1">'SELECT * FROM inodes WHERE id=?'</span><span class="p">,</span> <span class="p">(</span><span class="n">inode</span><span class="p">,))</span>
<span class="n">entry</span> <span class="o">=</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">EntryAttributes</span><span class="p">()</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_ino</span> <span class="o">=</span> <span class="n">inode</span>
<span class="n">entry</span><span class="o">.</span><span class="n">generation</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">entry</span><span class="o">.</span><span class="n">entry_timeout</span> <span class="o">=</span> <span class="mi">300</span>
<span class="n">entry</span><span class="o">.</span><span class="n">attr_timeout</span> <span class="o">=</span> <span class="mi">300</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_mode</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s1">'mode'</span><span class="p">]</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_nlink</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s2">"SELECT COUNT(inode) FROM contents WHERE inode=?"</span><span class="p">,</span>
<span class="p">(</span><span class="n">inode</span><span class="p">,))[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_uid</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s1">'uid'</span><span class="p">]</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_gid</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s1">'gid'</span><span class="p">]</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_rdev</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s1">'rdev'</span><span class="p">]</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_size</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s1">'size'</span><span class="p">]</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_blksize</span> <span class="o">=</span> <span class="mi">512</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_blocks</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_atime_ns</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s1">'atime_ns'</span><span class="p">]</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_mtime_ns</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s1">'mtime_ns'</span><span class="p">]</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_ctime_ns</span> <span class="o">=</span> <span class="n">row</span><span class="p">[</span><span class="s1">'ctime_ns'</span><span class="p">]</span>
<span class="k">return</span> <span class="n">entry</span>
<span class="k">def</span> <span class="nf">readlink</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s1">'SELECT * FROM inodes WHERE id=?'</span><span class="p">,</span> <span class="p">(</span><span class="n">inode</span><span class="p">,))[</span><span class="s1">'target'</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">opendir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">return</span> <span class="n">inode</span>
<span class="k">def</span> <span class="nf">readdir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">off</span><span class="p">):</span>
<span class="k">if</span> <span class="n">off</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">off</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span>
<span class="n">cursor2</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">cursor</span><span class="p">()</span>
<span class="n">cursor2</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"SELECT * FROM contents WHERE parent_inode=? "</span>
<span class="s1">'AND rowid > ? ORDER BY rowid'</span><span class="p">,</span> <span class="p">(</span><span class="n">inode</span><span class="p">,</span> <span class="n">off</span><span class="p">))</span>
<span class="k">for</span> <span class="n">row</span> <span class="ow">in</span> <span class="n">cursor2</span><span class="p">:</span>
<span class="k">yield</span> <span class="p">(</span><span class="n">row</span><span class="p">[</span><span class="s1">'name'</span><span class="p">],</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">row</span><span class="p">[</span><span class="s1">'inode'</span><span class="p">]),</span> <span class="n">row</span><span class="p">[</span><span class="s1">'rowid'</span><span class="p">])</span>
<span class="k">def</span> <span class="nf">unlink</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span><span class="n">ctx</span><span class="p">):</span>
<span class="n">entry</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lookup</span><span class="p">(</span><span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
<span class="k">if</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_ISDIR</span><span class="p">(</span><span class="n">entry</span><span class="o">.</span><span class="n">st_mode</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">EISDIR</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_remove</span><span class="p">(</span><span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">entry</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">rmdir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">entry</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lookup</span><span class="p">(</span><span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_ISDIR</span><span class="p">(</span><span class="n">entry</span><span class="o">.</span><span class="n">st_mode</span><span class="p">):</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOTDIR</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_remove</span><span class="p">(</span><span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">entry</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_remove</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">entry</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s2">"SELECT COUNT(inode) FROM contents WHERE parent_inode=?"</span><span class="p">,</span>
<span class="p">(</span><span class="n">entry</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,))[</span><span class="mi">0</span><span class="p">]</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOTEMPTY</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"DELETE FROM contents WHERE name=? AND parent_inode=?"</span><span class="p">,</span>
<span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">))</span>
<span class="k">if</span> <span class="n">entry</span><span class="o">.</span><span class="n">st_nlink</span> <span class="o">==</span> <span class="mi">1</span> <span class="ow">and</span> <span class="n">entry</span><span class="o">.</span><span class="n">st_ino</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">inode_open_count</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"DELETE FROM inodes WHERE id=?"</span><span class="p">,</span> <span class="p">(</span><span class="n">entry</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,))</span>
<span class="k">def</span> <span class="nf">symlink</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">target</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">mode</span> <span class="o">=</span> <span class="p">(</span><span class="n">stat</span><span class="o">.</span><span class="n">S_IFLNK</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IRUSR</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IWUSR</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IXUSR</span> <span class="o">|</span>
<span class="n">stat</span><span class="o">.</span><span class="n">S_IRGRP</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IWGRP</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IXGRP</span> <span class="o">|</span>
<span class="n">stat</span><span class="o">.</span><span class="n">S_IROTH</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IWOTH</span> <span class="o">|</span> <span class="n">stat</span><span class="o">.</span><span class="n">S_IXOTH</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_create</span><span class="p">(</span><span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">target</span><span class="o">=</span><span class="n">target</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">rename</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p_old</span><span class="p">,</span> <span class="n">name_old</span><span class="p">,</span> <span class="n">inode_p_new</span><span class="p">,</span> <span class="n">name_new</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">entry_old</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lookup</span><span class="p">(</span><span class="n">inode_p_old</span><span class="p">,</span> <span class="n">name_old</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">entry_new</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">lookup</span><span class="p">(</span><span class="n">inode_p_new</span><span class="p">,</span> <span class="n">name_new</span><span class="p">)</span>
<span class="k">except</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">if</span> <span class="n">exc</span><span class="o">.</span><span class="n">errno</span> <span class="o">!=</span> <span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">:</span>
<span class="k">raise</span>
<span class="n">target_exists</span> <span class="o">=</span> <span class="bp">False</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">target_exists</span> <span class="o">=</span> <span class="bp">True</span>
<span class="k">if</span> <span class="n">target_exists</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_replace</span><span class="p">(</span><span class="n">inode_p_old</span><span class="p">,</span> <span class="n">name_old</span><span class="p">,</span> <span class="n">inode_p_new</span><span class="p">,</span> <span class="n">name_new</span><span class="p">,</span>
<span class="n">entry_old</span><span class="p">,</span> <span class="n">entry_new</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"UPDATE contents SET name=?, parent_inode=? WHERE name=? "</span>
<span class="s2">"AND parent_inode=?"</span><span class="p">,</span> <span class="p">(</span><span class="n">name_new</span><span class="p">,</span> <span class="n">inode_p_new</span><span class="p">,</span>
<span class="n">name_old</span><span class="p">,</span> <span class="n">inode_p_old</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">_replace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p_old</span><span class="p">,</span> <span class="n">name_old</span><span class="p">,</span> <span class="n">inode_p_new</span><span class="p">,</span> <span class="n">name_new</span><span class="p">,</span>
<span class="n">entry_old</span><span class="p">,</span> <span class="n">entry_new</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s2">"SELECT COUNT(inode) FROM contents WHERE parent_inode=?"</span><span class="p">,</span>
<span class="p">(</span><span class="n">entry_new</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,))[</span><span class="mi">0</span><span class="p">]</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOTEMPTY</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"UPDATE contents SET inode=? WHERE name=? AND parent_inode=?"</span><span class="p">,</span>
<span class="p">(</span><span class="n">entry_old</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,</span> <span class="n">name_new</span><span class="p">,</span> <span class="n">inode_p_new</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'DELETE FROM contents WHERE name=? AND parent_inode=?'</span><span class="p">,</span>
<span class="p">(</span><span class="n">name_old</span><span class="p">,</span> <span class="n">inode_p_old</span><span class="p">))</span>
<span class="k">if</span> <span class="n">entry_new</span><span class="o">.</span><span class="n">st_nlink</span> <span class="o">==</span> <span class="mi">1</span> <span class="ow">and</span> <span class="n">entry_new</span><span class="o">.</span><span class="n">st_ino</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">inode_open_count</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"DELETE FROM inodes WHERE id=?"</span><span class="p">,</span> <span class="p">(</span><span class="n">entry_new</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,))</span>
<span class="k">def</span> <span class="nf">link</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">new_inode_p</span><span class="p">,</span> <span class="n">new_name</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">entry_p</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">new_inode_p</span><span class="p">)</span>
<span class="k">if</span> <span class="n">entry_p</span><span class="o">.</span><span class="n">st_nlink</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">log</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s1">'Attempted to create entry </span><span class="si">%s</span><span class="s1"> with unlinked parent </span><span class="si">%d</span><span class="s1">'</span><span class="p">,</span>
<span class="n">new_name</span><span class="p">,</span> <span class="n">new_inode_p</span><span class="p">)</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">EINVAL</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"INSERT INTO contents (name, inode, parent_inode) VALUES(?,?,?)"</span><span class="p">,</span>
<span class="p">(</span><span class="n">new_name</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">new_inode_p</span><span class="p">))</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">inode</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">setattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">attr</span><span class="p">,</span> <span class="n">fields</span><span class="p">,</span> <span class="n">fh</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_size</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s1">'SELECT data FROM inodes WHERE id=?'</span><span class="p">,</span> <span class="p">(</span><span class="n">inode</span><span class="p">,))[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="sa">b</span><span class="s1">''</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">data</span><span class="p">)</span> <span class="o"><</span> <span class="n">attr</span><span class="o">.</span><span class="n">st_size</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">data</span> <span class="o">+</span> <span class="sa">b</span><span class="s1">'</span><span class="se">\0</span><span class="s1">'</span> <span class="o">*</span> <span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_size</span> <span class="o">-</span> <span class="nb">len</span><span class="p">(</span><span class="n">data</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">data</span><span class="p">[:</span><span class="n">attr</span><span class="o">.</span><span class="n">st_size</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'UPDATE inodes SET data=?, size=? WHERE id=?'</span><span class="p">,</span>
<span class="p">(</span><span class="nb">buffer</span><span class="p">(</span><span class="n">data</span><span class="p">),</span> <span class="n">attr</span><span class="o">.</span><span class="n">st_size</span><span class="p">,</span> <span class="n">inode</span><span class="p">))</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_mode</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'UPDATE inodes SET mode=? WHERE id=?'</span><span class="p">,</span>
<span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_mode</span><span class="p">,</span> <span class="n">inode</span><span class="p">))</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_uid</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'UPDATE inodes SET uid=? WHERE id=?'</span><span class="p">,</span>
<span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_uid</span><span class="p">,</span> <span class="n">inode</span><span class="p">))</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_gid</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'UPDATE inodes SET gid=? WHERE id=?'</span><span class="p">,</span>
<span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_gid</span><span class="p">,</span> <span class="n">inode</span><span class="p">))</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_atime</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'UPDATE inodes SET atime_ns=? WHERE id=?'</span><span class="p">,</span>
<span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_atime_ns</span><span class="p">,</span> <span class="n">inode</span><span class="p">))</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_mtime</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'UPDATE inodes SET mtime_ns=? WHERE id=?'</span><span class="p">,</span>
<span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_mtime_ns</span><span class="p">,</span> <span class="n">inode</span><span class="p">))</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">inode</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">mknod</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">rdev</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_create</span><span class="p">(</span><span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">rdev</span><span class="o">=</span><span class="n">rdev</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">mkdir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_create</span><span class="p">(</span><span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">statfs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">stat_</span> <span class="o">=</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">StatvfsData</span><span class="p">()</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_bsize</span> <span class="o">=</span> <span class="mi">512</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_frsize</span> <span class="o">=</span> <span class="mi">512</span>
<span class="n">size</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s1">'SELECT SUM(size) FROM inodes'</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_blocks</span> <span class="o">=</span> <span class="n">size</span> <span class="o">//</span> <span class="n">stat_</span><span class="o">.</span><span class="n">f_frsize</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_bfree</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="n">size</span> <span class="o">//</span> <span class="n">stat_</span><span class="o">.</span><span class="n">f_frsize</span><span class="p">,</span> <span class="mi">1024</span><span class="p">)</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_bavail</span> <span class="o">=</span> <span class="n">stat_</span><span class="o">.</span><span class="n">f_bfree</span>
<span class="n">inodes</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s1">'SELECT COUNT(id) FROM inodes'</span><span class="p">)[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_files</span> <span class="o">=</span> <span class="n">inodes</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_ffree</span> <span class="o">=</span> <span class="nb">max</span><span class="p">(</span><span class="n">inodes</span> <span class="p">,</span> <span class="mi">100</span><span class="p">)</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_favail</span> <span class="o">=</span> <span class="n">stat_</span><span class="o">.</span><span class="n">f_ffree</span>
<span class="k">return</span> <span class="n">stat_</span>
<span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">flags</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="c1"># Yeah, unused arguments</span>
<span class="c1">#pylint: disable=W0613</span>
<span class="bp">self</span><span class="o">.</span><span class="n">inode_open_count</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="c1"># Use inodes as a file handles</span>
<span class="k">return</span> <span class="n">inode</span>
<span class="k">def</span> <span class="nf">access</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="c1"># Yeah, could be a function and has unused arguments</span>
<span class="c1">#pylint: disable=R0201,W0613</span>
<span class="k">return</span> <span class="bp">True</span>
<span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_parent</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">flags</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="c1">#pylint: disable=W0612</span>
<span class="n">entry</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_create</span><span class="p">(</span><span class="n">inode_parent</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">inode_open_count</span><span class="p">[</span><span class="n">entry</span><span class="o">.</span><span class="n">st_ino</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">return</span> <span class="p">(</span><span class="n">entry</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,</span> <span class="n">entry</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">rdev</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">target</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">inode_p</span><span class="p">)</span><span class="o">.</span><span class="n">st_nlink</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">log</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span><span class="s1">'Attempted to create entry </span><span class="si">%s</span><span class="s1"> with unlinked parent </span><span class="si">%d</span><span class="s1">'</span><span class="p">,</span>
<span class="n">name</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">)</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">EINVAL</span><span class="p">)</span>
<span class="n">now_ns</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">time</span><span class="p">()</span> <span class="o">*</span> <span class="mf">1e9</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'INSERT INTO inodes (uid, gid, mode, mtime_ns, atime_ns, '</span>
<span class="s1">'ctime_ns, target, rdev) VALUES(?, ?, ?, ?, ?, ?, ?, ?)'</span><span class="p">,</span>
<span class="p">(</span><span class="n">ctx</span><span class="o">.</span><span class="n">uid</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">gid</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">now_ns</span><span class="p">,</span> <span class="n">now_ns</span><span class="p">,</span> <span class="n">now_ns</span><span class="p">,</span> <span class="n">target</span><span class="p">,</span> <span class="n">rdev</span><span class="p">))</span>
<span class="n">inode</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">lastrowid</span>
<span class="bp">self</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"INSERT INTO contents(name, inode, parent_inode) VALUES(?,?,?)"</span><span class="p">,</span>
<span class="p">(</span><span class="n">name</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">))</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">inode</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">read</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fh</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">length</span><span class="p">):</span>
<span class="n">data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s1">'SELECT data FROM inodes WHERE id=?'</span><span class="p">,</span> <span class="p">(</span><span class="n">fh</span><span class="p">,))[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="sa">b</span><span class="s1">''</span>
<span class="k">return</span> <span class="n">data</span><span class="p">[</span><span class="n">offset</span><span class="p">:</span><span class="n">offset</span><span class="o">+</span><span class="n">length</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">write</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fh</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">buf</span><span class="p">):</span>
<span class="n">data</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_row</span><span class="p">(</span><span class="s1">'SELECT data FROM inodes WHERE id=?'</span><span class="p">,</span> <span class="p">(</span><span class="n">fh</span><span class="p">,))[</span><span class="mi">0</span><span class="p">]</span>
<span class="k">if</span> <span class="n">data</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
<span class="n">data</span> <span class="o">=</span> <span class="sa">b</span><span class="s1">''</span>
<span class="n">data</span> <span class="o">=</span> <span class="n">data</span><span class="p">[:</span><span class="n">offset</span><span class="p">]</span> <span class="o">+</span> <span class="n">buf</span> <span class="o">+</span> <span class="n">data</span><span class="p">[</span><span class="n">offset</span><span class="o">+</span><span class="nb">len</span><span class="p">(</span><span class="n">buf</span><span class="p">):]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s1">'UPDATE inodes SET data=?, size=? WHERE id=?'</span><span class="p">,</span>
<span class="p">(</span><span class="nb">buffer</span><span class="p">(</span><span class="n">data</span><span class="p">),</span> <span class="nb">len</span><span class="p">(</span><span class="n">data</span><span class="p">),</span> <span class="n">fh</span><span class="p">))</span>
<span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="n">buf</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">release</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fh</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">inode_open_count</span><span class="p">[</span><span class="n">fh</span><span class="p">]</span> <span class="o">-=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">inode_open_count</span><span class="p">[</span><span class="n">fh</span><span class="p">]</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">inode_open_count</span><span class="p">[</span><span class="n">fh</span><span class="p">]</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">fh</span><span class="p">)</span><span class="o">.</span><span class="n">st_nlink</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor</span><span class="o">.</span><span class="n">execute</span><span class="p">(</span><span class="s2">"DELETE FROM inodes WHERE id=?"</span><span class="p">,</span> <span class="p">(</span><span class="n">fh</span><span class="p">,))</span>
<span class="k">class</span> <span class="nc">NoUniqueValueError</span><span class="p">(</span><span class="ne">Exception</span><span class="p">):</span>
<span class="k">def</span> <span class="fm">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="s1">'Query generated more than 1 result row'</span>
<span class="k">class</span> <span class="nc">NoSuchRowError</span><span class="p">(</span><span class="ne">Exception</span><span class="p">):</span>
<span class="k">def</span> <span class="fm">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="s1">'Query produced 0 result rows'</span>
<span class="k">def</span> <span class="nf">init_logging</span><span class="p">(</span><span class="n">debug</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="n">formatter</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">Formatter</span><span class="p">(</span><span class="s1">'</span><span class="si">%(asctime)s</span><span class="s1">.</span><span class="si">%(msecs)03d</span><span class="s1"> </span><span class="si">%(threadName)s</span><span class="s1">: '</span>
<span class="s1">'[</span><span class="si">%(name)s</span><span class="s1">] </span><span class="si">%(message)s</span><span class="s1">'</span><span class="p">,</span> <span class="n">datefmt</span><span class="o">=</span><span class="s2">"%Y-%m-</span><span class="si">%d</span><span class="s2"> %H:%M:%S"</span><span class="p">)</span>
<span class="n">handler</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">StreamHandler</span><span class="p">()</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setFormatter</span><span class="p">(</span><span class="n">formatter</span><span class="p">)</span>
<span class="n">root_logger</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">()</span>
<span class="k">if</span> <span class="n">debug</span><span class="p">:</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">DEBUG</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">DEBUG</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">INFO</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">INFO</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">addHandler</span><span class="p">(</span><span class="n">handler</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">parse_args</span><span class="p">():</span>
<span class="sd">'''Parse command line'''</span>
<span class="n">parser</span> <span class="o">=</span> <span class="n">ArgumentParser</span><span class="p">()</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'mountpoint'</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">str</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Where to mount the file system'</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--debug'</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">'store_true'</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Enable debugging output'</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--debug-fuse'</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">'store_true'</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Enable FUSE debugging output'</span><span class="p">)</span>
<span class="k">return</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>
<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">'__main__'</span><span class="p">:</span>
<span class="n">options</span> <span class="o">=</span> <span class="n">parse_args</span><span class="p">()</span>
<span class="n">init_logging</span><span class="p">(</span><span class="n">options</span><span class="o">.</span><span class="n">debug</span><span class="p">)</span>
<span class="n">operations</span> <span class="o">=</span> <span class="n">Operations</span><span class="p">()</span>
<span class="n">fuse_options</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">llfuse</span><span class="o">.</span><span class="n">default_options</span><span class="p">)</span>
<span class="n">fuse_options</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">'fsname=tmpfs'</span><span class="p">)</span>
<span class="n">fuse_options</span><span class="o">.</span><span class="n">discard</span><span class="p">(</span><span class="s1">'default_permissions'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">options</span><span class="o">.</span><span class="n">debug_fuse</span><span class="p">:</span>
<span class="n">fuse_options</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">'debug'</span><span class="p">)</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">init</span><span class="p">(</span><span class="n">operations</span><span class="p">,</span> <span class="n">options</span><span class="o">.</span><span class="n">mountpoint</span><span class="p">,</span> <span class="n">fuse_options</span><span class="p">)</span>
<span class="c1"># sqlite3 does not support multithreading</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">main</span><span class="p">(</span><span class="n">workers</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="k">except</span><span class="p">:</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">close</span><span class="p">(</span><span class="n">unmount</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">raise</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
</pre></div>
</td></tr></table></div>
</div>
<div class="section" id="passthrough-overlay-file-system">
<h2>Passthrough / Overlay File System<a class="headerlink" href="#passthrough-overlay-file-system" title="Permalink to this headline">¶</a></h2>
<p>(shipped as <code class="file docutils literal"><span class="pre">examples/passthroughfs.py</span></code>)</p>
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470</pre></div></td><td class="code"><div class="highlight"><pre><span></span><span class="ch">#!/usr/bin/env python3</span>
<span class="sd">'''</span>
<span class="sd">passthroughfs.py - Example file system for Python-LLFUSE</span>
<span class="sd">This file system mirrors the contents of a specified directory tree. It requires</span>
<span class="sd">Python 3.3 (since Python 2.x does not support the follow_symlinks parameters for</span>
<span class="sd">os.* functions).</span>
<span class="sd">Caveats:</span>
<span class="sd"> * Inode generation numbers are not passed through but set to zero.</span>
<span class="sd"> * Block size (st_blksize) and number of allocated blocks (st_blocks) are not</span>
<span class="sd"> passed through.</span>
<span class="sd"> * Performance for large directories is not good, because the directory</span>
<span class="sd"> is always read completely.</span>
<span class="sd"> * There may be a way to break-out of the directory tree.</span>
<span class="sd"> * The readdir implementation is not fully POSIX compliant. If a directory</span>
<span class="sd"> contains hardlinks and is modified during a readdir call, readdir()</span>
<span class="sd"> may return some of the hardlinked files twice or omit them completely.</span>
<span class="sd"> * If you delete or rename files in the underlying file system, the</span>
<span class="sd"> passthrough file system will get confused.</span>
<span class="sd">Copyright © Nikolaus Rath <Nikolaus.org></span>
<span class="sd">Permission is hereby granted, free of charge, to any person obtaining a copy of</span>
<span class="sd">this software and associated documentation files (the "Software"), to deal in</span>
<span class="sd">the Software without restriction, including without limitation the rights to</span>
<span class="sd">use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of</span>
<span class="sd">the Software, and to permit persons to whom the Software is furnished to do so.</span>
<span class="sd">THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span>
<span class="sd">IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS</span>
<span class="sd">FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR</span>
<span class="sd">COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER</span>
<span class="sd">IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN</span>
<span class="sd">CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
<span class="sd">'''</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="c1"># If we are running from the Python-LLFUSE source directory, try</span>
<span class="c1"># to load the module from there first.</span>
<span class="n">basedir</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">dirname</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">0</span><span class="p">]),</span> <span class="s1">'..'</span><span class="p">))</span>
<span class="k">if</span> <span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'setup.py'</span><span class="p">))</span> <span class="ow">and</span>
<span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">exists</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'src'</span><span class="p">,</span> <span class="s1">'llfuse.pyx'</span><span class="p">))):</span>
<span class="n">sys</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">basedir</span><span class="p">,</span> <span class="s1">'src'</span><span class="p">))</span>
<span class="kn">import</span> <span class="nn">llfuse</span>
<span class="kn">from</span> <span class="nn">argparse</span> <span class="kn">import</span> <span class="n">ArgumentParser</span>
<span class="kn">import</span> <span class="nn">errno</span>
<span class="kn">import</span> <span class="nn">logging</span>
<span class="kn">import</span> <span class="nn">stat</span> <span class="kn">as</span> <span class="nn">stat_m</span>
<span class="kn">from</span> <span class="nn">llfuse</span> <span class="kn">import</span> <span class="n">FUSEError</span>
<span class="kn">from</span> <span class="nn">os</span> <span class="kn">import</span> <span class="n">fsencode</span><span class="p">,</span> <span class="n">fsdecode</span>
<span class="kn">from</span> <span class="nn">collections</span> <span class="kn">import</span> <span class="n">defaultdict</span>
<span class="kn">import</span> <span class="nn">faulthandler</span>
<span class="n">faulthandler</span><span class="o">.</span><span class="n">enable</span><span class="p">()</span>
<span class="n">log</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="vm">__name__</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">Operations</span><span class="p">(</span><span class="n">llfuse</span><span class="o">.</span><span class="n">Operations</span><span class="p">):</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">source</span><span class="p">):</span>
<span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span> <span class="o">=</span> <span class="p">{</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span><span class="p">:</span> <span class="n">source</span> <span class="p">}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_lookup_cnt</span> <span class="o">=</span> <span class="n">defaultdict</span><span class="p">(</span><span class="k">lambda</span> <span class="p">:</span> <span class="mi">0</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fd_inode_map</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fd_open_count</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">_inode_to_path</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">):</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">val</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">errno</span><span class="o">.</span><span class="n">ENOENT</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">val</span><span class="p">,</span> <span class="nb">set</span><span class="p">):</span>
<span class="c1"># In case of hardlinks, pick any path</span>
<span class="n">val</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="nb">iter</span><span class="p">(</span><span class="n">val</span><span class="p">))</span>
<span class="k">return</span> <span class="n">val</span>
<span class="k">def</span> <span class="nf">_add_path</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'_add_path for </span><span class="si">%d</span><span class="s1">, </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_lookup_cnt</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="c1"># With hardlinks, one inode may map to multiple paths.</span>
<span class="k">if</span> <span class="n">inode</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">=</span> <span class="n">path</span>
<span class="k">return</span>
<span class="n">val</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">val</span><span class="p">,</span> <span class="nb">set</span><span class="p">):</span>
<span class="n">val</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">elif</span> <span class="n">val</span> <span class="o">!=</span> <span class="n">path</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">=</span> <span class="p">{</span> <span class="n">path</span><span class="p">,</span> <span class="n">val</span> <span class="p">}</span>
<span class="k">def</span> <span class="nf">forget</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_list</span><span class="p">):</span>
<span class="k">for</span> <span class="p">(</span><span class="n">inode</span><span class="p">,</span> <span class="n">nlookup</span><span class="p">)</span> <span class="ow">in</span> <span class="n">inode_list</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_lookup_cnt</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">></span> <span class="n">nlookup</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_lookup_cnt</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">-=</span> <span class="n">nlookup</span>
<span class="k">continue</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'forgetting about inode </span><span class="si">%d</span><span class="s1">'</span><span class="p">,</span> <span class="n">inode</span><span class="p">)</span>
<span class="k">assert</span> <span class="n">inode</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_lookup_cnt</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="k">except</span> <span class="ne">KeyError</span><span class="p">:</span> <span class="c1"># may have been deleted</span>
<span class="k">pass</span>
<span class="k">def</span> <span class="nf">lookup</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'lookup for </span><span class="si">%s</span><span class="s1"> in </span><span class="si">%d</span><span class="s1">'</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">)</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p</span><span class="p">),</span> <span class="n">name</span><span class="p">)</span>
<span class="n">attr</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_getattr</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="n">path</span><span class="p">)</span>
<span class="k">if</span> <span class="n">name</span> <span class="o">!=</span> <span class="s1">'.'</span> <span class="ow">and</span> <span class="n">name</span> <span class="o">!=</span> <span class="s1">'..'</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_add_path</span><span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="k">return</span> <span class="n">attr</span>
<span class="k">def</span> <span class="nf">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">inode</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_getattr</span><span class="p">(</span><span class="n">fd</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span><span class="p">[</span><span class="n">inode</span><span class="p">])</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_getattr</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">_getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="o">=</span><span class="bp">None</span><span class="p">,</span> <span class="n">fd</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
<span class="k">assert</span> <span class="n">fd</span> <span class="ow">is</span> <span class="bp">None</span> <span class="ow">or</span> <span class="n">path</span> <span class="ow">is</span> <span class="bp">None</span>
<span class="k">assert</span> <span class="ow">not</span><span class="p">(</span><span class="n">fd</span> <span class="ow">is</span> <span class="bp">None</span> <span class="ow">and</span> <span class="n">path</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">if</span> <span class="n">fd</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
<span class="n">stat</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">lstat</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">stat</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">fstat</span><span class="p">(</span><span class="n">fd</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="n">entry</span> <span class="o">=</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">EntryAttributes</span><span class="p">()</span>
<span class="k">for</span> <span class="n">attr</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'st_ino'</span><span class="p">,</span> <span class="s1">'st_mode'</span><span class="p">,</span> <span class="s1">'st_nlink'</span><span class="p">,</span> <span class="s1">'st_uid'</span><span class="p">,</span> <span class="s1">'st_gid'</span><span class="p">,</span>
<span class="s1">'st_rdev'</span><span class="p">,</span> <span class="s1">'st_size'</span><span class="p">,</span> <span class="s1">'st_atime_ns'</span><span class="p">,</span> <span class="s1">'st_mtime_ns'</span><span class="p">,</span>
<span class="s1">'st_ctime_ns'</span><span class="p">):</span>
<span class="nb">setattr</span><span class="p">(</span><span class="n">entry</span><span class="p">,</span> <span class="n">attr</span><span class="p">,</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">stat</span><span class="p">,</span> <span class="n">attr</span><span class="p">))</span>
<span class="n">entry</span><span class="o">.</span><span class="n">generation</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">entry</span><span class="o">.</span><span class="n">entry_timeout</span> <span class="o">=</span> <span class="mi">5</span>
<span class="n">entry</span><span class="o">.</span><span class="n">attr_timeout</span> <span class="o">=</span> <span class="mi">5</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_blksize</span> <span class="o">=</span> <span class="mi">512</span>
<span class="n">entry</span><span class="o">.</span><span class="n">st_blocks</span> <span class="o">=</span> <span class="p">((</span><span class="n">entry</span><span class="o">.</span><span class="n">st_size</span><span class="o">+</span><span class="n">entry</span><span class="o">.</span><span class="n">st_blksize</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="o">//</span> <span class="n">entry</span><span class="o">.</span><span class="n">st_blksize</span><span class="p">)</span>
<span class="k">return</span> <span class="n">entry</span>
<span class="k">def</span> <span class="nf">readlink</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">path</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">target</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">readlink</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="k">return</span> <span class="n">fsencode</span><span class="p">(</span><span class="n">target</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">opendir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">return</span> <span class="n">inode</span>
<span class="k">def</span> <span class="nf">readdir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">off</span><span class="p">):</span>
<span class="n">path</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode</span><span class="p">)</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'reading </span><span class="si">%s</span><span class="s1">'</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="n">entries</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">listdir</span><span class="p">(</span><span class="n">path</span><span class="p">):</span>
<span class="n">attr</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_getattr</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">name</span><span class="p">))</span>
<span class="n">entries</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">attr</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">attr</span><span class="p">))</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'read </span><span class="si">%d</span><span class="s1"> entries, starting at </span><span class="si">%d</span><span class="s1">'</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">entries</span><span class="p">),</span> <span class="n">off</span><span class="p">)</span>
<span class="c1"># This is not fully posix compatible. If there are hardlinks</span>
<span class="c1"># (two names with the same inode), we don't have a unique</span>
<span class="c1"># offset to start in between them. Note that we cannot simply</span>
<span class="c1"># count entries, because then we would skip over entries</span>
<span class="c1"># (or return them more than once) if the number of directory</span>
<span class="c1"># entries changes between two calls to readdir().</span>
<span class="k">for</span> <span class="p">(</span><span class="n">ino</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">attr</span><span class="p">)</span> <span class="ow">in</span> <span class="nb">sorted</span><span class="p">(</span><span class="n">entries</span><span class="p">):</span>
<span class="k">if</span> <span class="n">ino</span> <span class="o"><=</span> <span class="n">off</span><span class="p">:</span>
<span class="k">continue</span>
<span class="k">yield</span> <span class="p">(</span><span class="n">fsencode</span><span class="p">(</span><span class="n">name</span><span class="p">),</span> <span class="n">attr</span><span class="p">,</span> <span class="n">ino</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">unlink</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="n">parent</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p</span><span class="p">)</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">inode</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">lstat</span><span class="p">(</span><span class="n">path</span><span class="p">)</span><span class="o">.</span><span class="n">st_ino</span>
<span class="n">os</span><span class="o">.</span><span class="n">unlink</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="k">if</span> <span class="n">inode</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_lookup_cnt</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_forget_path</span><span class="p">(</span><span class="n">inode</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">rmdir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="n">parent</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p</span><span class="p">)</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">inode</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">lstat</span><span class="p">(</span><span class="n">path</span><span class="p">)</span><span class="o">.</span><span class="n">st_ino</span>
<span class="n">os</span><span class="o">.</span><span class="n">rmdir</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="k">if</span> <span class="n">inode</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_lookup_cnt</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_forget_path</span><span class="p">(</span><span class="n">inode</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_forget_path</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'forget </span><span class="si">%s</span><span class="s1"> for </span><span class="si">%d</span><span class="s1">'</span><span class="p">,</span> <span class="n">path</span><span class="p">,</span> <span class="n">inode</span><span class="p">)</span>
<span class="n">val</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">val</span><span class="p">,</span> <span class="nb">set</span><span class="p">):</span>
<span class="n">val</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">val</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">=</span> <span class="nb">next</span><span class="p">(</span><span class="nb">iter</span><span class="p">(</span><span class="n">val</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">symlink</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">target</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="n">target</span> <span class="o">=</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">target</span><span class="p">)</span>
<span class="n">parent</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p</span><span class="p">)</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">name</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">symlink</span><span class="p">(</span><span class="n">target</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="n">os</span><span class="o">.</span><span class="n">chown</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">uid</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">gid</span><span class="p">,</span> <span class="n">follow_symlinks</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="n">stat</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">lstat</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_add_path</span><span class="p">(</span><span class="n">stat</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">stat</span><span class="o">.</span><span class="n">st_ino</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">rename</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p_old</span><span class="p">,</span> <span class="n">name_old</span><span class="p">,</span> <span class="n">inode_p_new</span><span class="p">,</span> <span class="n">name_new</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">name_old</span> <span class="o">=</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name_old</span><span class="p">)</span>
<span class="n">name_new</span> <span class="o">=</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name_new</span><span class="p">)</span>
<span class="n">parent_old</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p_old</span><span class="p">)</span>
<span class="n">parent_new</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p_new</span><span class="p">)</span>
<span class="n">path_old</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parent_old</span><span class="p">,</span> <span class="n">name_old</span><span class="p">)</span>
<span class="n">path_new</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parent_new</span><span class="p">,</span> <span class="n">name_new</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">rename</span><span class="p">(</span><span class="n">path_old</span><span class="p">,</span> <span class="n">path_new</span><span class="p">)</span>
<span class="n">inode</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">lstat</span><span class="p">(</span><span class="n">path_new</span><span class="p">)</span><span class="o">.</span><span class="n">st_ino</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="k">if</span> <span class="n">inode</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_lookup_cnt</span><span class="p">:</span>
<span class="k">return</span>
<span class="n">val</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">val</span><span class="p">,</span> <span class="nb">set</span><span class="p">):</span>
<span class="k">assert</span> <span class="nb">len</span><span class="p">(</span><span class="n">val</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span>
<span class="n">val</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">path_new</span><span class="p">)</span>
<span class="n">val</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">path_old</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">assert</span> <span class="n">val</span> <span class="o">==</span> <span class="n">path_old</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">=</span> <span class="n">path_new</span>
<span class="k">def</span> <span class="nf">link</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">new_inode_p</span><span class="p">,</span> <span class="n">new_name</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">new_name</span> <span class="o">=</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">new_name</span><span class="p">)</span>
<span class="n">parent</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">new_inode_p</span><span class="p">)</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">parent</span><span class="p">,</span> <span class="n">new_name</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">link</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode</span><span class="p">),</span> <span class="n">path</span><span class="p">,</span> <span class="n">follow_symlinks</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_add_path</span><span class="p">(</span><span class="n">inode</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">inode</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">setattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">attr</span><span class="p">,</span> <span class="n">fields</span><span class="p">,</span> <span class="n">fh</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="c1"># We use the f* functions if possible so that we can handle</span>
<span class="c1"># a setattr() call for an inode without associated directory</span>
<span class="c1"># handle.</span>
<span class="k">if</span> <span class="n">fh</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span>
<span class="n">path_or_fh</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode</span><span class="p">)</span>
<span class="n">truncate</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">truncate</span>
<span class="n">chmod</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">chmod</span>
<span class="n">chown</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">chown</span>
<span class="n">stat</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">lstat</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">path_or_fh</span> <span class="o">=</span> <span class="n">fh</span>
<span class="n">truncate</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">ftruncate</span>
<span class="n">chmod</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">fchmod</span>
<span class="n">chown</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">fchown</span>
<span class="n">stat</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">fstat</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_size</span><span class="p">:</span>
<span class="n">truncate</span><span class="p">(</span><span class="n">path_or_fh</span><span class="p">,</span> <span class="n">attr</span><span class="o">.</span><span class="n">st_size</span><span class="p">)</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_mode</span><span class="p">:</span>
<span class="c1"># Under Linux, chmod always resolves symlinks so we should</span>
<span class="c1"># actually never get a setattr() request for a symbolic</span>
<span class="c1"># link.</span>
<span class="k">assert</span> <span class="ow">not</span> <span class="n">stat_m</span><span class="o">.</span><span class="n">S_ISLNK</span><span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_mode</span><span class="p">)</span>
<span class="n">chmod</span><span class="p">(</span><span class="n">path_or_fh</span><span class="p">,</span> <span class="n">stat_m</span><span class="o">.</span><span class="n">S_IMODE</span><span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_mode</span><span class="p">))</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_uid</span><span class="p">:</span>
<span class="n">chown</span><span class="p">(</span><span class="n">path_or_fh</span><span class="p">,</span> <span class="n">attr</span><span class="o">.</span><span class="n">st_uid</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="n">follow_symlinks</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_gid</span><span class="p">:</span>
<span class="n">chown</span><span class="p">(</span><span class="n">path_or_fh</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="n">attr</span><span class="o">.</span><span class="n">st_gid</span><span class="p">,</span> <span class="n">follow_symlinks</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">if</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_atime</span> <span class="ow">and</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_mtime</span><span class="p">:</span>
<span class="c1"># utime accepts both paths and file descriptiors</span>
<span class="n">os</span><span class="o">.</span><span class="n">utime</span><span class="p">(</span><span class="n">path_or_fh</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">follow_symlinks</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">ns</span><span class="o">=</span><span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_atime_ns</span><span class="p">,</span> <span class="n">attr</span><span class="o">.</span><span class="n">st_mtime_ns</span><span class="p">))</span>
<span class="k">elif</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_atime</span> <span class="ow">or</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_mtime</span><span class="p">:</span>
<span class="c1"># We can only set both values, so we first need to retrieve the</span>
<span class="c1"># one that we shouldn't be changing.</span>
<span class="n">oldstat</span> <span class="o">=</span> <span class="n">stat</span><span class="p">(</span><span class="n">path_or_fh</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">fields</span><span class="o">.</span><span class="n">update_atime</span><span class="p">:</span>
<span class="n">attr</span><span class="o">.</span><span class="n">st_atime_ns</span> <span class="o">=</span> <span class="n">oldstat</span><span class="o">.</span><span class="n">st_atime_ns</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">attr</span><span class="o">.</span><span class="n">st_mtime_ns</span> <span class="o">=</span> <span class="n">oldstat</span><span class="o">.</span><span class="n">st_mtime_ns</span>
<span class="n">os</span><span class="o">.</span><span class="n">utime</span><span class="p">(</span><span class="n">path_or_fh</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">follow_symlinks</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">ns</span><span class="o">=</span><span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_atime_ns</span><span class="p">,</span> <span class="n">attr</span><span class="o">.</span><span class="n">st_mtime_ns</span><span class="p">))</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">getattr</span><span class="p">(</span><span class="n">inode</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">mknod</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">rdev</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p</span><span class="p">),</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name</span><span class="p">))</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">mknod</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">mode</span><span class="o">=</span><span class="p">(</span><span class="n">mode</span> <span class="o">&</span> <span class="o">~</span><span class="n">ctx</span><span class="o">.</span><span class="n">umask</span><span class="p">),</span> <span class="n">device</span><span class="o">=</span><span class="n">rdev</span><span class="p">)</span>
<span class="n">os</span><span class="o">.</span><span class="n">chown</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">uid</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">gid</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="n">attr</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_getattr</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="n">path</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_add_path</span><span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="k">return</span> <span class="n">attr</span>
<span class="k">def</span> <span class="nf">mkdir</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p</span><span class="p">),</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name</span><span class="p">))</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">mkdir</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">mode</span><span class="o">=</span><span class="p">(</span><span class="n">mode</span> <span class="o">&</span> <span class="o">~</span><span class="n">ctx</span><span class="o">.</span><span class="n">umask</span><span class="p">))</span>
<span class="n">os</span><span class="o">.</span><span class="n">chown</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">uid</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">gid</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="n">attr</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_getattr</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="n">path</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_add_path</span><span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="k">return</span> <span class="n">attr</span>
<span class="k">def</span> <span class="nf">statfs</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">root</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_path_map</span><span class="p">[</span><span class="n">llfuse</span><span class="o">.</span><span class="n">ROOT_INODE</span><span class="p">]</span>
<span class="n">stat_</span> <span class="o">=</span> <span class="n">llfuse</span><span class="o">.</span><span class="n">StatvfsData</span><span class="p">()</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">statfs</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">statvfs</span><span class="p">(</span><span class="n">root</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="k">for</span> <span class="n">attr</span> <span class="ow">in</span> <span class="p">(</span><span class="s1">'f_bsize'</span><span class="p">,</span> <span class="s1">'f_frsize'</span><span class="p">,</span> <span class="s1">'f_blocks'</span><span class="p">,</span> <span class="s1">'f_bfree'</span><span class="p">,</span> <span class="s1">'f_bavail'</span><span class="p">,</span>
<span class="s1">'f_files'</span><span class="p">,</span> <span class="s1">'f_ffree'</span><span class="p">,</span> <span class="s1">'f_favail'</span><span class="p">):</span>
<span class="nb">setattr</span><span class="p">(</span><span class="n">stat_</span><span class="p">,</span> <span class="n">attr</span><span class="p">,</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">statfs</span><span class="p">,</span> <span class="n">attr</span><span class="p">))</span>
<span class="n">stat_</span><span class="o">.</span><span class="n">f_namemax</span> <span class="o">=</span> <span class="n">statfs</span><span class="o">.</span><span class="n">f_namemax</span> <span class="o">-</span> <span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">root</span><span class="p">)</span><span class="o">+</span><span class="mi">1</span><span class="p">)</span>
<span class="k">return</span> <span class="n">stat_</span>
<span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode</span><span class="p">,</span> <span class="n">flags</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="k">if</span> <span class="n">inode</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span><span class="p">:</span>
<span class="n">fd</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fd_open_count</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">return</span> <span class="n">fd</span>
<span class="k">assert</span> <span class="n">flags</span> <span class="o">&</span> <span class="n">os</span><span class="o">.</span><span class="n">O_CREAT</span> <span class="o">==</span> <span class="mi">0</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">fd</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode</span><span class="p">),</span> <span class="n">flags</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span> <span class="o">=</span> <span class="n">fd</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fd_inode_map</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span> <span class="o">=</span> <span class="n">inode</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fd_open_count</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">return</span> <span class="n">fd</span>
<span class="k">def</span> <span class="nf">create</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">inode_p</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">mode</span><span class="p">,</span> <span class="n">flags</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_inode_to_path</span><span class="p">(</span><span class="n">inode_p</span><span class="p">),</span> <span class="n">fsdecode</span><span class="p">(</span><span class="n">name</span><span class="p">))</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">fd</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">flags</span> <span class="o">|</span> <span class="n">os</span><span class="o">.</span><span class="n">O_CREAT</span> <span class="o">|</span> <span class="n">os</span><span class="o">.</span><span class="n">O_TRUNC</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="n">attr</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_getattr</span><span class="p">(</span><span class="n">fd</span><span class="o">=</span><span class="n">fd</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_add_path</span><span class="p">(</span><span class="n">attr</span><span class="o">.</span><span class="n">st_ino</span><span class="p">,</span> <span class="n">path</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span><span class="p">[</span><span class="n">attr</span><span class="o">.</span><span class="n">st_ino</span><span class="p">]</span> <span class="o">=</span> <span class="n">fd</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fd_inode_map</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span> <span class="o">=</span> <span class="n">attr</span><span class="o">.</span><span class="n">st_ino</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fd_open_count</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">return</span> <span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">attr</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">read</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fd</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">length</span><span class="p">):</span>
<span class="n">os</span><span class="o">.</span><span class="n">lseek</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">SEEK_SET</span><span class="p">)</span>
<span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">length</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">write</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fd</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">buf</span><span class="p">):</span>
<span class="n">os</span><span class="o">.</span><span class="n">lseek</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">offset</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">SEEK_SET</span><span class="p">)</span>
<span class="k">return</span> <span class="n">os</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">buf</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">release</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">fd</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_fd_open_count</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span> <span class="o">></span> <span class="mi">1</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fd_open_count</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span> <span class="o">-=</span> <span class="mi">1</span>
<span class="k">return</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_fd_open_count</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span>
<span class="n">inode</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_fd_inode_map</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_inode_fd_map</span><span class="p">[</span><span class="n">inode</span><span class="p">]</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_fd_inode_map</span><span class="p">[</span><span class="n">fd</span><span class="p">]</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">close</span><span class="p">(</span><span class="n">fd</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">OSError</span> <span class="k">as</span> <span class="n">exc</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">FUSEError</span><span class="p">(</span><span class="n">exc</span><span class="o">.</span><span class="n">errno</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">init_logging</span><span class="p">(</span><span class="n">debug</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
<span class="n">formatter</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">Formatter</span><span class="p">(</span><span class="s1">'</span><span class="si">%(asctime)s</span><span class="s1">.</span><span class="si">%(msecs)03d</span><span class="s1"> </span><span class="si">%(threadName)s</span><span class="s1">: '</span>
<span class="s1">'[</span><span class="si">%(name)s</span><span class="s1">] </span><span class="si">%(message)s</span><span class="s1">'</span><span class="p">,</span> <span class="n">datefmt</span><span class="o">=</span><span class="s2">"%Y-%m-</span><span class="si">%d</span><span class="s2"> %H:%M:%S"</span><span class="p">)</span>
<span class="n">handler</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">StreamHandler</span><span class="p">()</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setFormatter</span><span class="p">(</span><span class="n">formatter</span><span class="p">)</span>
<span class="n">root_logger</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">()</span>
<span class="k">if</span> <span class="n">debug</span><span class="p">:</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">DEBUG</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">DEBUG</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">handler</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">INFO</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">setLevel</span><span class="p">(</span><span class="n">logging</span><span class="o">.</span><span class="n">INFO</span><span class="p">)</span>
<span class="n">root_logger</span><span class="o">.</span><span class="n">addHandler</span><span class="p">(</span><span class="n">handler</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">parse_args</span><span class="p">(</span><span class="n">args</span><span class="p">):</span>
<span class="sd">'''Parse command line'''</span>
<span class="n">parser</span> <span class="o">=</span> <span class="n">ArgumentParser</span><span class="p">()</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'source'</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">str</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Directory tree to mirror'</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'mountpoint'</span><span class="p">,</span> <span class="nb">type</span><span class="o">=</span><span class="nb">str</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Where to mount the file system'</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--single'</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">'store_true'</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Run single threaded'</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--debug'</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">'store_true'</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Enable debugging output'</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">'--debug-fuse'</span><span class="p">,</span> <span class="n">action</span><span class="o">=</span><span class="s1">'store_true'</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="bp">False</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">'Enable FUSE debugging output'</span><span class="p">)</span>
<span class="k">return</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">(</span><span class="n">args</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">main</span><span class="p">():</span>
<span class="n">options</span> <span class="o">=</span> <span class="n">parse_args</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">:])</span>
<span class="n">init_logging</span><span class="p">(</span><span class="n">options</span><span class="o">.</span><span class="n">debug</span><span class="p">)</span>
<span class="n">operations</span> <span class="o">=</span> <span class="n">Operations</span><span class="p">(</span><span class="n">options</span><span class="o">.</span><span class="n">source</span><span class="p">)</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'Mounting...'</span><span class="p">)</span>
<span class="n">fuse_options</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="n">llfuse</span><span class="o">.</span><span class="n">default_options</span><span class="p">)</span>
<span class="n">fuse_options</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">'fsname=passthroughfs'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">options</span><span class="o">.</span><span class="n">debug_fuse</span><span class="p">:</span>
<span class="n">fuse_options</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="s1">'debug'</span><span class="p">)</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">init</span><span class="p">(</span><span class="n">operations</span><span class="p">,</span> <span class="n">options</span><span class="o">.</span><span class="n">mountpoint</span><span class="p">,</span> <span class="n">fuse_options</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'Entering main loop..'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">options</span><span class="o">.</span><span class="n">single</span><span class="p">:</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">main</span><span class="p">(</span><span class="n">workers</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">main</span><span class="p">()</span>
<span class="k">except</span><span class="p">:</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">close</span><span class="p">(</span><span class="n">unmount</span><span class="o">=</span><span class="bp">False</span><span class="p">)</span>
<span class="k">raise</span>
<span class="n">log</span><span class="o">.</span><span class="n">debug</span><span class="p">(</span><span class="s1">'Unmounting..'</span><span class="p">)</span>
<span class="n">llfuse</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">'__main__'</span><span class="p">:</span>
<span class="n">main</span><span class="p">()</span>
</pre></div>
</td></tr></table></div>
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