+(defun mail-source-delete-old-incoming (&optional age confirm)
+ "Remove incoming files older than AGE days.
+If CONFIRM is non-nil, ask for confirmation before removing a file."
+ (interactive "P")
+ (let* ((high2days (/ 65536.0 60 60 24));; convert high bits to days
+ (low2days (/ 1.0 65536.0)) ;; convert low bits to days
+ (diff (if (natnump age) age 30));; fallback, if no valid AGE given
+ currday files)
+ (setq files (directory-files
+ mail-source-directory t
+ (concat mail-source-incoming-file-prefix "*"))
+ currday (* (car (current-time)) high2days)
+ currday (+ currday (* low2days (nth 1 (current-time)))))
+ (while files
+ (let* ((ffile (car files))
+ (bfile (gnus-replace-in-string
+ ffile "\\`.*/\\([^/]+\\)\\'" "\\1"))
+ (filetime (nth 5 (file-attributes ffile)))
+ (fileday (* (car filetime) high2days))
+ (fileday (+ fileday (* low2days (nth 1 filetime)))))
+ (setq files (cdr files))
+ (when (and (> (- currday fileday) diff)
+ (gnus-message 8 "File `%s' is older than %s day(s)"
+ bfile diff)
+ (or (not confirm)
+ (y-or-n-p (concat "Remove file `" bfile "'? "))))
+ (delete-file ffile))))))
+