file-write-date pathspec => date
Arguments and Values:
pathspec---a pathname designator.
date---a universal time or nil.
Returns a universal time representing the time at which the file specified by pathspec was last written (or created), or returns nil if such a time cannot be determined.
(with-open-file (s "noel.text" :direction :output :if-exists :error) (format s "~&Dear Santa,~2%I was good this year. ~ Please leave lots of toys.~2%Love, Sue~ ~2%attachments: milk, cookies~%") (truename s)) => #P"CUPID:/susan/noel.text" (with-open-file (s "noel.text") (file-write-date s)) => 2902600800
The host computer's file system.
An error of type file-error is signaled if pathspec is wild.
An error of type file-error is signaled if the file system cannot perform the requested operation.
Section 18.104.22.168 (Universal Time), Section 19.1.2 (Pathnames as Filenames)