NAME

       md_src_plugins_null_README - README

       • infos = Information about null plugin is in keys below

       • infos/author = Markus Raab elektra@libelektra.org

       • infos/licence = BSD

       • infos/needs =

       • infos/provides =

       • infos/placements = postgetstorage presetstorage

       • infos/description = Transforms null and empty values to text and back

       This plugin is a filter plugin which allows Elektra to better deal with null values and
       empty strings.

       Elektra supports null values for binary keys. They differ from an empty string
       substantially in how they are handled. Some plugins that work on values are not aware of
       null values. They would crash when they try to access a value that is believed to be a
       string.

   Special Values
       The plugin transcodes all null values to @NULL, all empty strings to @EMPTY, and all
       strings starting with @ to begin with @@.

   Usage
       In order to use the null plugin you must add null to info/needs in the plugin you wish to
       use.

       Once null is included in infos/needs, the null plugin will filter values for the storage
       plugin. As a result, the storage plugin will never come across a null value or an empty
       string, instead it will be get strings with @NULL and @EMPTY respectively.