The base directory relative to which user-specific data files should be stored.
Subfolder to append to determined path.
If path does not exist, create directory using 700 permissions (i.e. allow access only for current user).
Path to user-specific data directory or empty string on error.
xdgAllDataDirs, xdgDataDirs
See Implementation
The base directory relative to which user-specific data files should be stored.