Thanks!

Yes, I add the statement , but result the same. So, I believe it's not the
problem of (buffer-string)

-------------------------------
(defun startup (check-command wanted start-command)
  "check whether the 'wanted' state satisfied, if not, launch the
start-command"
  (interactive)
  (save-excursion
    (let* ((d-buf (get-buffer-create "diagnose"))
       (process-connection-type nil)
       (process-status (eval `(call-process (car check-command) nil d-buf t
,@(cdr check-command)))))
      (switch-to-buffer d-buf)
      (print `(,(buffer-modified-p) ,(buffer-size) ,(point-min) ,(point)
,(point-max)) d-buf)
      ;;(debug)
      (if (not (string-match wanted (buffer-string)))
      (progn
        (print (concat "starting command " (stringlist-to-string
start-command " ")) d-buf)
        (eval `(start-process "start up" d-buf (car start-command) ,@(cdr
start-command)))
        )
    (print
     (concat wanted " matched! no need to start " (stringlist-to-string
start-command " ")) d-buf)
    ))))

and aux function

(defun stringlist-to-string (list connector)
  "translate string list to string , cons using connector"
  (let ((result ""))
    (mapcar (lambda (string)
          (setq result (concat result string connector))
          ) list)
    (substring result 0 -1)))

On 5/29/07, Thien-Thi Nguyen <ttn@gnuvola.org> wrote:
>
> () "Yu,Gang" <wuhanyugang@gmail.com>
> () Tue, 29 May 2007 14:12:46 +0800
>
>    How can I solve the problem? thanks
>
> determine the current buffer at the moment `(buffer-string)' is
> evaluated.  if it is not as you expect, learn how to make it so.
>
> thi
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>



-- 
YuGang