gildea@BBN.COM (Stephen Gildea) (02/22/89)
Here is a version of telnet.el that handles the initial password
inputting better than the version in 18.52 does. Some systems send
the initial banner message in lots of little packets, so this version
looks longer for the password prompt. There are new variables to make
this timing customizable. Also, the password match is more specific
so it doesn't get confused by "incorrect password" messages.
This version also includes Hal Peterson's telnet-last-input fixes.
< Stephen
;; Copyright (C) 1985 Free Software Foundation
;; This file is part of GNU Emacs.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY. No author or distributor
;; accepts responsibility to anyone for the consequences of using it
;; or for whether it serves any particular purpose or works at all,
;; unless he says so in writing. Refer to the GNU Emacs General Public
;; License for full details.
;; Everyone is granted permission to copy, modify and redistribute
;; GNU Emacs, but only under the conditions described in the
;; GNU Emacs General Public License. A copy of this license is
;; supposed to have been given to you along with GNU Emacs so you
;; can know your rights and responsibilities. It should be in a
;; file named COPYING. Among other things, the copyright notice
;; and this notice must be preserved on all copies.
;; Author William F. Schelter
;;to do fix software types for lispm:
;;to eval current expression. Also to try to send escape keys correctly.
;;essentially we'll want the rubout-handler off.
(provide 'telnet)
(defvar telnet-new-line "\r")
(defvar telnet-mode-map nil)
(defvar telnet-prompt-pattern "^[^#$%>]*[#$%>] *")
(defvar telnet-interrupt-string "\^c" "String sent by C-c.")
(defvar telnet-replace-c-g nil)
(defvar telnet-remote-echoes nil)
(defvar telnet-previous-input "")
(defvar telnet-count 0
"Number of output strings read from the telnet process whil looking
for the initial password.")
(defvar telnet-initial-count -50
"Initial value of telnet-count. Should be set to the negative of the
number of terminal writes telnet will make setting up the host connection.")
(defvar telnet-maximum-count 4
"Maximum value telnet-count can have. After this many passes, we
stop looking for initial setup data. Should be set to the number of
terminal writes telnet will make rejecting one login and prompting
for the again for a username and password.")
(defun telnet-interrupt-subjob ()
(interactive)
"Interrupt the program running through telnet on the remote host."
(send-string nil telnet-interrupt-string))
(defun telnet-c-z ()
(interactive)
(send-string nil ""))
(defun send-process-next-char ()
(interactive)
(send-string nil
(char-to-string
(let ((inhibit-quit t))
(prog1 (read-char)
(setq quit-flag nil))))))
; initialization on first load.
(if telnet-mode-map
nil
(make-variable-buffer-local 'telnet-previous-input)
(setq telnet-mode-map (make-sparse-keymap))
(define-key telnet-mode-map "\C-m" 'telnet-send-input)
(define-key telnet-mode-map "\C-j" 'telnet-send-input)
(define-key telnet-mode-map "\C-c\C-d" 'shell-send-eof)
(define-key telnet-mode-map "\C-c\C-q" 'send-process-next-char)
(define-key telnet-mode-map "\C-c\C-c" 'telnet-interrupt-subjob)
(define-key telnet-mode-map "\C-c\C-z" 'telnet-c-z)
(define-key telnet-mode-map "\C-c\C-u" 'kill-shell-input)
(define-key telnet-mode-map "\C-c\C-w" 'backward-kill-word)
(define-key telnet-mode-map "\C-c\C-o" 'kill-output-from-shell)
(define-key telnet-mode-map "\C-c\C-r" 'show-output-from-shell)
(define-key telnet-mode-map "\C-c\C-y" 'telnet-copy-last-input))
;;maybe should have a flag for when have found type
(defun telnet-check-software-type-initialize (string)
"Tries to put correct initializations in. Needs work."
(cond ((string-match "unix" string)
(setq telnet-prompt-pattern shell-prompt-pattern)
(setq telnet-new-line "\n"))
((string-match "tops-20" string) ;;maybe add telnet-replace-c-g
(setq telnet-prompt-pattern "[@>]*"))
((string-match "its" string)
(setq telnet-prompt-pattern "^[^*>]*[*>] *"))
((string-match "explorer" string) ;;explorer telnet needs work
(setq telnet-replace-c-g ?\n))
))
(defun telnet-initial-filter (proc string)
;For reading up to and including password; also will get machine type.
(cond ((string-match "No such host" string)
(kill-buffer (process-buffer proc))
(error "No such host."))
((string-match "password:" string)
(telnet-filter proc string)
(let ((echo-keystrokes 0))
(setq password (read-password)))
(setq telnet-count 0)
(send-string proc (concat password telnet-new-line)))
(t (telnet-check-software-type-initialize string)
(telnet-filter proc string)
(cond ((> telnet-count telnet-maximum-count)
(set-process-filter proc 'telnet-filter))
(t (setq telnet-count (1+ telnet-count)))))))
(defun telnet-filter (proc string)
(save-excursion
(set-buffer (process-buffer proc))
(goto-char (point-max))
(let ((now (point)))
(insert string)
(subst-char-in-region now (point) ?\^m ?\ )
(and telnet-replace-c-g (subst-char-in-region now (point) ?\^g telnet-replace-c-g)))
(if (process-mark proc)
(set-marker (process-mark proc) (point)))
(if (and (integer-or-marker-p last-input-start)
(marker-position last-input-start)
telnet-remote-echoes)
(delete-region last-input-start last-input-end)))
(if (eq (process-buffer proc)
(current-buffer))
(goto-char (point-max))))
(defun delete-char-or-send-eof (arg killp)
"At end of buffer, send eof to subshell. Otherwise delete character."
(interactive "p\nP")
(if (and (eobp) (not killp))
(process-send-eof)
(delete-char arg killp)))
(defun telnet-send-input ()
"Send input to remote host.
At end of buffer, sends all text after last output
as input to the telnet, including a telnet-new-line inserted at the end.
Not at end, copies current line to the end of the buffer and sends it,
after first attempting to discard any prompt at the beginning of the line
by matching the regexp that is the value of telnet-prompt-pattern if possible.
In any case, save the sent string in telnet-previous-input."
(interactive)
(let (copied)
(end-of-line)
(if (eobp)
(progn
(move-marker last-input-start
(process-mark (get-buffer-process (current-buffer))))
(move-marker last-input-end (point)))
(beginning-of-line)
(re-search-forward telnet-prompt-pattern nil t)
(let ((copy (buffer-substring (point)
(progn (forward-line 1) (point)))))
(goto-char (point-max))
(move-marker last-input-start (point))
(insert copy) (setq copied t)
(move-marker last-input-end (point))))
(save-excursion
(goto-char last-input-start)
(let ((process (get-buffer-process (current-buffer)))
(input (buffer-substring last-input-start last-input-end)))
(send-string process input)
(if (not copied) (send-string process telnet-new-line))
(set-marker (process-mark process) (point))
(setq telnet-previous-input input)))))
(defun telnet-copy-last-input ()
"Copy previous telnet input, sans newline, and insert before point."
(interactive)
(insert telnet-previous-input)
(if (eq (aref telnet-previous-input
(length telnet-previous-input))
?\n)
(delete-char -1)))
(defun telnet (arg)
"Open a network login connection to host named HOST (a string).
Communication with HOST is recorded in a buffer *HOST-telnet*.
Normally input is edited in Emacs and sent a line at a time."
(interactive "sOpen telnet connection to host: ")
(require 'shell)
(let ((name (concat arg "-telnet" )))
(switch-to-buffer (make-shell name "telnet"))
(set-process-filter (get-process name) 'telnet-initial-filter)
(erase-buffer)
(send-string name (concat "open " arg "\n"))
(telnet-mode)
(setq telnet-count telnet-initial-count)))
(defun read-password ()
(let ((answ "") tem)
(message "Reading password...")
(while (not(or (= (setq tem (read-char)) ?\^m)
(= tem ?\n)))
(setq answ (concat answ (char-to-string tem))))
answ))
(defun telnet-mode ()
"This mode is for use during telnet from a buffer to another
host. It has most of the same commands as shell mode.
There is a variable `telnet-interrupt-string' which is the character
sent to try to stop execution of a job on the remote host.
Data is sent to the remote host when `return' is typed.
Thus if you may need to edit the data before sending you
should use c-n to move down a line. Then you can return
to alter a previous line. Of course you should not use this
mode of telnet if you want to run emacs like programs on the
remote host (at least not yet!).
The following commands imitate the usual Unix interrupt and
editing control characters:
\\{telnet-mode-map}
Bugs:
--Replace
--For Unix interacts poorly with tcsh although csh,sh,ksh are ok."
(interactive)
(kill-all-local-variables)
(setq major-mode 'telnet-mode)
(setq mode-name "Telnet")
(setq mode-line-process '(": %s"))
(make-local-variable 'last-input-start)
(use-local-map telnet-mode-map)
(let ((tem telnet-prompt-pattern))
(make-local-variable 'telnet-prompt-pattern)
(setq telnet-prompt-pattern tem))
(make-local-variable 'telnet-interrupt-string)
(setq telnet-interrupt-string "")
(make-local-variable 'telnet-new-line)
(setq telnet-new-line "\r")
(make-local-variable 'last-input-start)
(setq last-input-start (make-marker))
(make-local-variable 'last-input-end)
(setq last-input-end (make-marker))
(make-local-variable 'telnet-remote-echoes)
(setq telnet-remote-echoes t)
(make-local-variable 'telnet-replace-c-g)
(setq telnet-replace-c-g nil))