.. _ossec-regex:

ossec-regex
===========

``ossec-regex`` is a simple program that will validate a regex expression.a
The pattern should be enclosed in single quotes to help prevent any strange interactions with the shell.

The syntax for ``ossec-regex`` is simple: ``/var/ossec/bin/ossec-regex '<pattern>'``
It then reads strings from stdin and outputs matches to stdout.
``+OSRegex_Execute`` and ``+OS_Regex`` are printed if a match is successful.


Example 1: A simple digit match:
^^^^^^^^^^^^^~^^^^^^^^^^^^^^^^^^

.. code-block:: console

    # /var/ossec/bin/ossec-regex '^\d\d\d'
    333
    +OSRegex_Execute: 333
    +OS_Regex       : 333
    f44
    222
    +OSRegex_Execute: 222
    +OS_Regex       : 222