shtool-path(1) on Linux
The text 3f57dab4c43f, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.
GNU shtool command dealing with shell path variables
Flags it lists
-
--basename -
--dirname -
--magic -
--path -
--reverse -
--suppress -
-b -
-d -
-m -
-p -
-r -
-s