process communication help

[Yu,Gang]

Hi ,all:

   I get a problem, when I want to get sub-a process output from the buffer.

Here is the code, in my .emacs:

(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)))))
      (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)
    ))))
  
(setq system-start-up-list
      '((("sudo" "netstat" "-i") "eth0" ("sudo" "ifup" "eth0")))
    )

;;(debug-on-entry 'startup)

(mapcar (lambda (ssup-item)
      (let ((check-command (car ssup-item))
        (wanted (cadr ssup-item))
        (start-command (caddr ssup-item)))
        (startup check-command wanted start-command))
      ) system-start-up-list)

Something strange is that, I get the following in my diagnose buffer:

Kernel Interface table
Iface   MTU Met   RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0   1500 0      3959      0      0      0     1903      0      0      0 BMRU
lo    16436 0       122      0      0      0      122      0      0      0 LRU

(nil 0 1 1 1)

"starting command sudo ifup eth0"
ifup: interface eth0 already configured

Process start up finished

It seems that , string 
"
Kernel Interface table
Iface   MTU Met   RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0   1500 0      3959      0      0      0     1903      0      0      0 BMRU
lo    16436 0       122      0      0      0      122      0      0      0 LRU
" could not be read by the (buffer-string) :(

How can I solve the problem? thanks

cheers


-- 
YuGang