How do I check what backend Roundcube is using?

Question

How do I check what backend Roundcube is using?

Answer

There are two database options Roundcube can use: MySQL/MariaDB and SQLite.

Running the following command reveals what database backend is in use:

# grep -Ei "db_dsnw.*//" /usr/local/cpanel/base/3rdparty/roundcube/config/config.inc.php

If SQLite is used, the output starts with the following string:

CONFIG_TEXT: $config['db_dsnw'] = 'sqlite:///

If MySQL/MariaDB is used, it will start with the following:

CONFIG_TEXT: $config['db_dsnw'] = 'mysql://