Specifying Permissions for Schema (Data) Directories and Tables
By default MariaDB uses the following modes for creating directories and files.
|Mode for||Default Mode||Environment variable|
|Files||0660 (same as -rw-rw----)||UMASK|
|Directories||0700 (same as drwx------)||UMASK_DIR|
Note that the environment variables are modes specified in octal and OR:de with the default value (as the default value is the minimum value needed for mysqld to work).
In other words, if you would run the following in the shell:
set UMASK=001 export UMASK
mysqld would use the mode
0661 when creating new files.
If you start the server with systemctl:
systemctl edit mariadb
An editor opens.
This creates a file named override.conf in the directory /etc/systemd/system/mariadb.service.d/
Write the desired value in the editor.
After saving this file, you need to reload the service definitions before the changes will be recognized by MariaDB, thus:
systemctl daemon-reload systemctl restart mariadb
Note that mysql_install_db does not read the service configuration. To use UMASK with mysql_install_db you must set & export the environment variable in the shell executing the utility.