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<li class="nav-item nav-item-this"><a href="">Command Line Engines</a></li>
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<section id="command-line-engines">
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<span id="engine-command"></span><h1>Command Line Engines<a class="headerlink" href="#command-line-engines" title="Permalink to this heading">¶</a></h1>
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<aside class="sidebar">
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<p class="sidebar-title">info</p>
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<ul class="simple">
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<li><p><a class="reference external" href="https://github.com/searxng/searxng/blob/master/searx/engines/command.py">command.py</a></p></li>
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<li><p><a class="reference internal" href="../index.html#offline-engines"><span class="std std-ref">Offline Engines</span></a></p></li>
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<nav class="contents local" id="contents">
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<ul class="simple">
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<li><p><a class="reference internal" href="#configuration" id="id1">Configuration</a></p></li>
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<li><p><a class="reference internal" href="#example" id="id2">Example</a></p></li>
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<li><p><a class="reference internal" href="#implementations" id="id3">Implementations</a></p></li>
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</ul>
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<aside class="sidebar">
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<p class="sidebar-title">info</p>
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<p>Initial sponsored by <a class="reference external" href="https://nlnet.nl/discovery">Search and Discovery Fund</a> of <a class="reference external" href="https://nlnet.nl/">NLnet Foundation</a>.</p>
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</aside>
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<span class="target" id="module-searx.engines.command"></span><p>With <em>command engines</em> administrators can run engines to integrate arbitrary
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shell commands.</p>
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<div class="admonition attention">
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<p class="admonition-title">Attention</p>
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<p>When creating and enabling a <code class="docutils literal notranslate"><span class="pre">command</span></code> engine on a public instance, you
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must be careful to avoid leaking private data.</p>
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</div>
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<p>The easiest solution is to limit the access by setting <code class="docutils literal notranslate"><span class="pre">tokens</span></code> as described
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in section <a class="reference internal" href="../../../admin/settings/settings_engine.html#private-engines"><span class="std std-ref">Private Engines (tokens)</span></a>. The engine base is flexible. Only your
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imagination can limit the power of this engine (and maybe security concerns).</p>
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<section id="configuration">
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<h2><a class="toc-backref" href="#id1" role="doc-backlink">Configuration</a><a class="headerlink" href="#configuration" title="Permalink to this heading">¶</a></h2>
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<p>The following options are available:</p>
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<dl>
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<dt><code class="docutils literal notranslate"><span class="pre">command</span></code>:</dt><dd><p>A comma separated list of the elements of the command. A special token
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<code class="docutils literal notranslate"><span class="pre">{{QUERY}}</span></code> tells where to put the search terms of the user. Example:</p>
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<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="p p-Indicator">[</span><span class="s">'ls'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'-l'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'-h'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'{{QUERY}}'</span><span class="p p-Indicator">]</span>
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</pre></div>
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</div>
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</dd>
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<dt><code class="docutils literal notranslate"><span class="pre">delimiter</span></code>:</dt><dd><p>A mapping containing a delimiter <code class="docutils literal notranslate"><span class="pre">char</span></code> and the <em>titles</em> of each element in
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<code class="docutils literal notranslate"><span class="pre">keys</span></code>.</p>
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</dd>
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<dt><code class="docutils literal notranslate"><span class="pre">parse_regex</span></code>:</dt><dd><p>A dict containing the regular expressions for each result key.</p>
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</dd>
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</dl>
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<p><code class="docutils literal notranslate"><span class="pre">query_type</span></code>:</p>
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<blockquote>
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<div><p>The expected type of user search terms. Possible values: <code class="docutils literal notranslate"><span class="pre">path</span></code> and
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<code class="docutils literal notranslate"><span class="pre">enum</span></code>.</p>
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<dl class="simple">
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<dt><code class="docutils literal notranslate"><span class="pre">path</span></code>:</dt><dd><p>Checks if the user provided path is inside the working directory. If not,
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the query is not executed.</p>
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</dd>
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<dt><code class="docutils literal notranslate"><span class="pre">enum</span></code>:</dt><dd><p>Is a list of allowed search terms. If the user submits something which is
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not included in the list, the query returns an error.</p>
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</dd>
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</dl>
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</div></blockquote>
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<dl class="simple">
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<dt><code class="docutils literal notranslate"><span class="pre">query_enum</span></code>:</dt><dd><p>A list containing allowed search terms if <code class="docutils literal notranslate"><span class="pre">query_type</span></code> is set to <code class="docutils literal notranslate"><span class="pre">enum</span></code>.</p>
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</dd>
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<dt><code class="docutils literal notranslate"><span class="pre">working_dir</span></code>:</dt><dd><p>The directory where the command has to be executed. Default: <code class="docutils literal notranslate"><span class="pre">./</span></code>.</p>
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</dd>
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<dt><code class="docutils literal notranslate"><span class="pre">result_separator</span></code>:</dt><dd><p>The character that separates results. Default: <code class="docutils literal notranslate"><span class="pre">\n</span></code>.</p>
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</dd>
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</dl>
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</section>
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<section id="example">
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<h2><a class="toc-backref" href="#id2" role="doc-backlink">Example</a><a class="headerlink" href="#example" title="Permalink to this heading">¶</a></h2>
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<p>The example engine below can be used to find files with a specific name in the
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configured working directory:</p>
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<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">find</span>
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<span class="w"> </span><span class="nt">engine</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">command</span>
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<span class="w"> </span><span class="nt">command</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">'find'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'.'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'-name'</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">'{{QUERY}}'</span><span class="p p-Indicator">]</span>
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<span class="w"> </span><span class="nt">query_type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">path</span>
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<span class="w"> </span><span class="nt">shortcut</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">fnd</span>
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<span class="w"> </span><span class="nt">delimiter</span><span class="p">:</span>
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<span class="w"> </span><span class="nt">chars</span><span class="p">:</span><span class="w"> </span><span class="s">'</span><span class="nv"> </span><span class="s">'</span>
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<span class="w"> </span><span class="nt">keys</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">'line'</span><span class="p p-Indicator">]</span>
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</pre></div>
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</div>
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</section>
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<section id="implementations">
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<h2><a class="toc-backref" href="#id3" role="doc-backlink">Implementations</a><a class="headerlink" href="#implementations" title="Permalink to this heading">¶</a></h2>
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</section>
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<dl class="py function">
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<dt class="sig sig-object py" id="searx.engines.command.check_parsing_options">
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<span class="sig-prename descclassname"><span class="pre">searx.engines.command.</span></span><span class="sig-name descname"><span class="pre">check_parsing_options</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">engine_settings</span></span></em><span class="sig-paren">)</span><a class="reference internal" href="../../../_modules/searx/engines/command.html#check_parsing_options"><span class="viewcode-link"><span class="pre">[source]</span></span></a><a class="headerlink" href="#searx.engines.command.check_parsing_options" title="Permalink to this definition">¶</a></dt>
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<dd><p>Checks if delimiter based parsing or regex parsing is configured correctly</p>
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</dd></dl>
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</section>
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<h3><a href="../../../index.html">Table of Contents</a></h3>
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<ul class="current">
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<li class="toctree-l1"><a class="reference internal" href="../../../user/index.html">User information</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../../own-instance.html">Why use a private instance?</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../../admin/index.html">Administrator documentation</a></li>
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<li class="toctree-l1 current"><a class="reference internal" href="../../index.html">Developer documentation</a><ul class="current">
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<li class="toctree-l2"><a class="reference internal" href="../../quickstart.html">Development Quickstart</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../../contribution_guide.html">How to contribute</a></li>
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<li class="toctree-l2 current"><a class="reference internal" href="../index.html">Engine Implementations</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../../search_api.html">Search API</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../../plugins.html">Plugins</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../../translation.html">Translation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../../lxcdev.html">Developing in Linux Containers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../../makefile.html">Makefile & <code class="docutils literal notranslate"><span class="pre">./manage</span></code></a></li>
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<li class="toctree-l2"><a class="reference internal" href="../../reST.html">reST primer</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../../searxng_extra/index.html">Tooling box <code class="docutils literal notranslate"><span class="pre">searxng_extra</span></code></a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="../../../utils/index.html">DevOps tooling box</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../../src/index.html">Source-Code</a></li>
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<h3>Project Links</h3>
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<ul>
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<li><a href="https://github.com/searxng/searxng/tree/master">Source</a>
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<li><a href="https://github.com/searxng/searxng/wiki">Wiki</a>
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<li><a href="https://searx.space">Public instances</a>
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<li><a href="https://github.com/searxng/searxng/issues">Issue Tracker</a>
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</ul><h3>Navigation</h3>
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<ul>
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<li><a href="../../../index.html">Overview</a>
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<li><a href="../../index.html">Developer documentation</a>
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<ul>
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<li><a href="../index.html">Engine Implementations</a>
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<ul>
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<li>Previous: <a href="../demo/demo_offline.html" title="previous chapter">Demo Offline Engine</a>
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<li>Next: <a href="nosql-engines.html" title="next chapter">NoSQL databases</a></ul>
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