systemd-path
When invoked without arguments, a list of known paths and their current values is shown. When at least one argument is passed, the path with this name is queried and its value shown. The variables whose name begins with "search-" do not refer to individual paths, but instead to a list of colon-separated search paths, in their order of precedence.
The following options are understood:
--suffix=
-h, --help
--version
On success, 0 is returned, a non-zero failure code otherwise.
systemd(1), file-hierarchy(7)