Variable: dired-touch-program
dired-touch-program is a customizable variable defined in dired.el.gz.
Value
"touch"
Documentation
Name of touch command (usually touch).
Source Code
;; Defined in /usr/src/emacs/lisp/dired.el.gz
(defcustom dired-touch-program "touch"
"Name of touch command (usually `touch')."
:group 'dired
:type 'file)