Variable: Info-current-file
Info-current-file is a buffer-local variable defined in info.el.gz.
Documentation
Info file that Info is now looking at, or nil.
This is the name that was specified in Info, not the actual file name. It doesn't contain directory names or file name extensions added by Info.
Source Code
;; Defined in /usr/src/emacs/lisp/info.el.gz
(defvar-local Info-current-file nil
"Info file that Info is now looking at, or nil.
This is the name that was specified in Info, not the actual file name.
It doesn't contain directory names or file name extensions added by Info.")