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searxng/docs/admin/engines/command-line-engines.rst
Markus Heiser 6f7b0d72c0 [docs] revision of the section 'Command Line Engines'
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
2021-06-04 15:05:58 +02:00

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