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.. _engine command:
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====================
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Command Line Engines
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====================
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.. sidebar:: info
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- :origin:`command.py <searx/engines/command.py>`
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- :ref:`offline engines`
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With *command engines* administrators can run engines to integrate arbitrary
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shell commands.
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When creating and enabling a ``command`` engine on a public instance, you must
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be careful to avoid leaking private data. The easiest solution is to limit the
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access by setting ``tokens`` as described in section :ref:`private engines`.
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The engine base is flexible. Only your imagination can limit the power of this
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engine (and maybe security concerns). The following options are available:
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``command``:
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A comma separated list of the elements of the command. A special token
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``{{QUERY}}`` tells where to put the search terms of the user. Example:
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.. code:: yaml
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['ls', '-l', '-h', '{{QUERY}}']
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``delimiter``:
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A mapping containing a delimiter ``char`` and the *titles* of each element in
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``keys``.
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``parse_regex``:
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A dict containing the regular expressions for each result key.
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``query_type``:
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The expected type of user search terms. Possible values: ``path`` and
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``enum``.
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``path``:
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Checks if the user provided path is inside the working directory. If not,
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the query is not executed.
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``enum``:
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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.
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``query_enum``:
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A list containing allowed search terms if ``query_type`` is set to ``enum``.
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``working_dir``:
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The directory where the command has to be executed. Default: ``./``
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``result_separator``:
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The character that separates results. Default: ``\n``
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The example engine below can be used to find files with a specific name in the
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configured working directory:
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.. code:: yaml
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- name: find
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engine: command
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command: ['find', '.', '-name', '{{QUERY}}']
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query_type: path
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shortcut: fnd
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delimiter:
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chars: ' '
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keys: ['line']
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Acknowledgment
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==============
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This development was sponsored by `Search and Discovery Fund
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<https://nlnet.nl/discovery>`_ of `NLnet Foundation <https://nlnet.nl/>`_.
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