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<article role="main" id="furo-main-content">
<section id="command-line-engines">
<span id="engine-command"></span><h1>Command Line Engines<a class="headerlink" href="#command-line-engines" title="Link to this heading"></a></h1>
<aside class="sidebar">
<p class="sidebar-title">info</p>
<ul class="simple">
<li><p><a class="extlink-origin reference external" href="https://github.com/searxng/searxng/blob/master/searx/engines/command.py">command.py</a></p></li>
<li><p><a class="reference internal" href="../index.html#offline-engines"><span class="std std-ref">Offline Engines</span></a></p></li>
</ul>
</aside>
<aside class="sidebar">
<p class="sidebar-title">info</p>
<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>
</aside>
<p id="module-searx.engines.command">With <em>command engines</em> administrators can run engines to integrate arbitrary
shell commands.</p>
<div class="admonition attention">
<p class="admonition-title">Attention</p>
<p>When creating and enabling a <code class="docutils literal notranslate"><span class="pre">command</span></code> engine on a public instance, you
must be careful to avoid leaking private data.</p>
</div>
<p>The easiest solution is to limit the access by setting <code class="docutils literal notranslate"><span class="pre">tokens</span></code> as described
in section <a class="reference internal" href="../../../admin/settings/settings_engines.html#private-engines"><span class="std std-ref">Private Engines (tokens)</span></a>. The engine base is flexible. Only your
imagination can limit the power of this engine (and maybe security concerns).</p>
<section id="configuration">
<h2>Configuration<a class="headerlink" href="#configuration" title="Link to this heading"></a></h2>
<p>The following options are available:</p>
<dl>
<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
<code class="docutils literal notranslate"><span class="pre">{{QUERY}}</span></code> tells where to put the search terms of the user. Example:</p>
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="p p-Indicator">[</span><span class="s">&#39;ls&#39;</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">&#39;-l&#39;</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">&#39;-h&#39;</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">&#39;{{QUERY}}&#39;</span><span class="p p-Indicator">]</span>
</pre></div>
</div>
</dd>
<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
<code class="docutils literal notranslate"><span class="pre">keys</span></code>.</p>
</dd>
<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>
</dd>
</dl>
<p><code class="docutils literal notranslate"><span class="pre">query_type</span></code>:</p>
<blockquote>
<div><p>The expected type of user search terms. Possible values: <code class="docutils literal notranslate"><span class="pre">path</span></code> and
<code class="docutils literal notranslate"><span class="pre">enum</span></code>.</p>
<dl class="simple">
<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,
the query is not executed.</p>
</dd>
<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
not included in the list, the query returns an error.</p>
</dd>
</dl>
</div></blockquote>
<dl class="simple">
<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>
</dd>
<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>
</dd>
<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>
</dd>
</dl>
</section>
<section id="example">
<h2>Example<a class="headerlink" href="#example" title="Link to this heading"></a></h2>
<p>The example engine below can be used to find files with a specific name in the
configured working directory:</p>
<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>
<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>
<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">&#39;find&#39;</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">&#39;.&#39;</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">&#39;-name&#39;</span><span class="p p-Indicator">,</span><span class="w"> </span><span class="s">&#39;{{QUERY}}&#39;</span><span class="p p-Indicator">]</span>
<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>
<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>
<span class="w"> </span><span class="nt">delimiter</span><span class="p">:</span>
<span class="w"> </span><span class="nt">chars</span><span class="p">:</span><span class="w"> </span><span class="s">&#39;</span><span class="nv"> </span><span class="s">&#39;</span>
<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">&#39;line&#39;</span><span class="p p-Indicator">]</span>
</pre></div>
</div>
</section>
<section id="implementations">
<h2>Implementations<a class="headerlink" href="#implementations" title="Link to this heading"></a></h2>
</section>
<dl class="py function">
<dt class="sig sig-object py" id="searx.engines.command.check_parsing_options">
<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="Link to this definition"></a></dt>
<dd><p>Checks if delimiter based parsing or regex parsing is configured correctly</p>
</dd></dl>
</section>
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<li><a class="reference internal" href="#">Command Line Engines</a><ul>
<li><a class="reference internal" href="#configuration">Configuration</a></li>
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<li><a class="reference internal" href="#searx.engines.command.check_parsing_options"><code class="docutils literal notranslate"><span class="pre">check_parsing_options()</span></code></a></li>
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