Returns an ordered list of base directories in which to access system-wide configuration information.
On UNIX platforms this is determined using the mechanisms described
XDG Base Directory Specification.
In this case the list of directories retrieved will be
On Windows it follows XDG Base Directory Specification if
XDG_CONFIG_DIRS is defined.
XDG_CONFIG_DIRS is undefined, the directory that contains application
data for all users is used instead. A typical path is
C:\Documents and Settings\All Users\Application Data.
This folder is used for application data
that is not user specific. For example, an application can store
a spell-check dictionary, a database of clip art, or a log file in the
FOLDERID_ProgramData folder. This information will not roam and is available
to anyone using the computer.
The return value is cached and modifying it at runtime is not supported, as it’s not thread-safe to modify environment variables at runtime.