+ (option-parse-error "path `~A' doesn't name a directory." arg))))
+ (let ((duration-units (make-hash-table :test #'equal)))
+ (dolist (item '((("Gs") #.(* 1000 1000 1000))
+ (("Ms") #.(* 1000 1000))
+ (("ks") 1000)
+ (("hs") 100)
+ (("das") 10)
+ (("yr" "year" "years" "y") #.(* 365 24 60 60))
+ (("wk" "week" "weeks" "w") #.(* 7 24 60 60))
+ (("day" "days" "dy" "d") #.(* 24 60 60))
+ (("hr" "hour" "hours" "h") #.(* 60 60))
+ (("min" "minute" "minutes" "m") 60)
+ (("s" "second" "seconds" "sec" "") 1)))
+ (dolist (name (car item))
+ (setf (gethash name duration-units) (cadr item))))
+ (defopthandler dur (var arg) ()
+ (let ((len (length arg)))
+ (multiple-value-bind (n i) (parse-integer arg :junk-allowed t)
+ (unless n
+ (option-parse-error "invalid duration `~A': ~
+ integer expected" arg))
+ (loop (cond ((or (>= i len)
+ (not (whitespace-char-p (char arg i))))
+ (return))
+ (t
+ (incf i))))
+ (let ((u0 i))
+ (loop (cond ((or (>= i len)
+ (whitespace-char-p (char arg i)))
+ (return))
+ (t
+ (incf i))))
+ (let* ((u1 i)
+ (unit (subseq arg u0 u1))
+ (scale (gethash unit duration-units)))
+ (unless scale
+ (option-parse-error "invalid duration `~A': ~
+ unknown unit `~A'"
+ arg unit))
+ (setf var (* n scale)))))))))