1 ;;; telnet.el --- run a telnet session from within an Emacs buffer
3 ;; Copyright (C) 1985, 1988, 1992, 1994 Free Software Foundation, Inc.
5 ;; Author: William F. Schelter
7 ;; Keywords: unix, comm
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 ;; This mode is intended to be used for telnet or rsh to a remote host;
29 ;; `telnet' and `rsh' are the two entry points. Multiple telnet or rsh
30 ;; sessions are supported.
32 ;; Normally, input is sent to the remote telnet/rsh line-by-line, as you
33 ;; type RET or LFD. C-c C-c sends a C-c to the remote immediately;
34 ;; C-c C-z sends C-z immediately. C-c C-q followed by any character
35 ;; sends that character immediately.
37 ;; All RET characters are filtered out of the output coming back from the
38 ;; remote system. The mode tries to do other useful translations based
39 ;; on what it sees coming back from the other system before the password
40 ;; query. It knows about UNIX, ITS, TOPS-20 and Explorer systems.
42 ;; You can use the global telnet-host-properties to associate a telnet
43 ;; program and login name with each host you regularly telnet to.
47 ;; to do fix software types for lispm:
48 ;; to eval current expression. Also to try to send escape keys correctly.
49 ;; essentially we'll want the rubout-handler off.
51 ;; filter is simplistic but should be okay for typical shell usage.
52 ;; needs hacking if it is going to deal with asynchronous output in a sane
57 (defvar telnet-host-properties
()
58 "Specify which telnet program to use for particular hosts.
59 Each element has the form (HOSTNAME PROGRAM [LOGIN-NAME])
60 HOSTNAME says which machine the element applies to.
61 PROGRAM says which program to run, to talk to that machine.
62 LOGIN-NAME, which is optional, says what to log in as on that machine.")
64 (defvar telnet-new-line
"\r")
65 (defvar telnet-mode-map nil
)
66 (defvar telnet-prompt-pattern
"^[^#$%>\n]*[#$%>] *")
67 (defvar telnet-replace-c-g nil
)
68 (make-variable-buffer-local
69 (defvar telnet-remote-echoes t
70 "True if the telnet process will echo input."))
71 (make-variable-buffer-local
72 (defvar telnet-interrupt-string
"\C-c" "String sent by C-c."))
74 (defvar telnet-count
0
75 "Number of output strings from telnet process while looking for password.")
76 (make-variable-buffer-local 'telnet-count
)
78 (defvar telnet-program
"telnet"
79 "Program to run to open a telnet connection.")
81 (defvar telnet-initial-count -
50
82 "Initial value of `telnet-count'. Should be set to the negative of the
83 number of terminal writes telnet will make setting up the host connection.")
85 (defvar telnet-maximum-count
4
86 "Maximum value `telnet-count' can have.
87 After this many passes, we stop looking for initial setup data.
88 Should be set to the number of terminal writes telnet will make
89 rejecting one login and prompting again for a username and password.")
91 (defun telnet-interrupt-subjob ()
93 "Interrupt the program running through telnet on the remote host."
94 (send-string nil telnet-interrupt-string
))
98 (send-string nil
"\C-z"))
100 (defun send-process-next-char ()
104 (let ((inhibit-quit t
))
106 (setq quit-flag nil
))))))
108 ; initialization on first load.
111 (setq telnet-mode-map
(nconc (make-sparse-keymap) comint-mode-map
))
112 (define-key telnet-mode-map
"\C-m" 'telnet-send-input
)
113 ; (define-key telnet-mode-map "\C-j" 'telnet-send-input)
114 (define-key telnet-mode-map
"\C-c\C-q" 'send-process-next-char
)
115 (define-key telnet-mode-map
"\C-c\C-c" 'telnet-interrupt-subjob
)
116 (define-key telnet-mode-map
"\C-c\C-z" 'telnet-c-z
))
118 ;;maybe should have a flag for when have found type
119 (defun telnet-check-software-type-initialize (string)
120 "Tries to put correct initializations in. Needs work."
121 (let ((case-fold-search t
))
122 (cond ((string-match "unix" string
)
123 (setq telnet-prompt-pattern comint-prompt-regexp
)
124 (setq telnet-new-line
"\n"))
125 ((string-match "tops-20" string
) ;;maybe add telnet-replace-c-g
126 (setq telnet-prompt-pattern
"[@>]*"))
127 ((string-match "its" string
)
128 (setq telnet-prompt-pattern
"^[^*>\n]*[*>] *"))
129 ((string-match "explorer" string
) ;;explorer telnet needs work
130 (setq telnet-replace-c-g ?
\n))))
131 (setq comint-prompt-regexp telnet-prompt-pattern
))
133 (defun telnet-initial-filter (proc string
)
134 ;For reading up to and including password; also will get machine type.
136 (set-buffer (process-buffer proc
))
137 (let ((case-fold-search t
))
138 (cond ((string-match "No such host" string
)
139 (kill-buffer (process-buffer proc
))
140 (error "No such host"))
141 ((string-match "passw" string
)
142 (telnet-filter proc string
)
143 (setq telnet-count
0)
144 (send-string proc
(concat (comint-read-noecho "Password: " t
)
146 (clear-this-command-keys))
147 (t (telnet-check-software-type-initialize string
)
148 (telnet-filter proc string
)
149 (cond ((> telnet-count telnet-maximum-count
)
150 (set-process-filter proc
'telnet-filter
))
151 (t (setq telnet-count
(1+ telnet-count
)))))))))
153 ;; Identical to comint-simple-send, except that it sends telnet-new-line
155 (defun telnet-simple-send (proc string
)
156 (comint-send-string proc string
)
157 (comint-send-string proc telnet-new-line
))
159 (defun telnet-filter (proc string
)
161 (set-buffer (process-buffer proc
))
162 (let* ((last-insertion (marker-position (process-mark proc
)))
163 (delta (- (point) last-insertion
))
164 (ie (and comint-last-input-end
165 (marker-position comint-last-input-end
)))
166 (w (get-buffer-window (current-buffer)))
167 (ws (and w
(window-start w
))))
168 (goto-char last-insertion
)
169 (insert-before-markers string
)
170 (set-marker comint-last-output-start last-insertion
)
171 (set-marker (process-mark proc
) (point))
172 (if ws
(set-window-start w ws t
))
173 (if ie
(set-marker comint-last-input-end ie
))
174 (while (progn (skip-chars-backward "^\C-m" last-insertion
)
175 (> (point) last-insertion
))
176 (delete-region (1- (point)) (point)))
177 (goto-char (process-mark proc
))
178 (and telnet-replace-c-g
179 (subst-char-in-region last-insertion
(point) ?\C-g
180 telnet-replace-c-g t
))
181 ;; If point is after the insertion place, move it
182 ;; along with the text.
184 (goto-char (+ (process-mark proc
) delta
))))))
186 (defun telnet-send-input ()
188 ; (comint-send-input telnet-new-line telnet-remote-echoes)
190 (if telnet-remote-echoes
191 (delete-region comint-last-input-start
192 comint-last-input-end
)))
194 ;;;###autoload (add-hook 'same-window-regexps "\\*telnet-.*\\*\\(\\|<[0-9]+>\\)")
198 "Open a network login connection to host named HOST (a string).
199 Communication with HOST is recorded in a buffer `*PROGRAM-HOST*'
200 where PROGRAM is the telnet program being used. This program
201 is controlled by the contents of the global variable `telnet-host-properties',
202 falling back on the value of the global variable `telnet-program'.
203 Normally input is edited in Emacs and sent a line at a time."
204 (interactive "sOpen connection to host: ")
205 (let* ((comint-delimiter-argument-list '(?\ ?
\t))
206 (properties (cdr (assoc host telnet-host-properties
)))
207 (telnet-program (if properties
(car properties
) telnet-program
))
208 (name (concat telnet-program
"-" (comint-arguments host
0 nil
) ))
209 (buffer (get-buffer (concat "*" name
"*")))
210 (telnet-options (if (cdr properties
) (cons "-l" (cdr properties
))))
212 (if (and buffer
(get-buffer-process buffer
))
213 (pop-to-buffer (concat "*" name
"*"))
215 (apply 'make-comint name telnet-program nil telnet-options
))
216 (setq process
(get-buffer-process (current-buffer)))
217 (set-process-filter process
'telnet-initial-filter
)
218 ;; Don't send the `open' cmd till telnet is ready for it.
219 (accept-process-output process
)
221 (send-string process
(concat "open " host
"\n"))
223 (setq comint-input-sender
'telnet-simple-send
)
224 (setq telnet-count telnet-initial-count
))))
226 (put 'telnet-mode
'mode-class
'special
)
228 (defun telnet-mode ()
229 "This mode is for using telnet (or rsh) from a buffer to another host.
230 It has most of the same commands as comint-mode.
231 There is a variable ``telnet-interrupt-string'' which is the character
232 sent to try to stop execution of a job on the remote host.
233 Data is sent to the remote host when RET is typed.
239 (setq major-mode
'telnet-mode
241 comint-prompt-regexp telnet-prompt-pattern
)
242 (use-local-map telnet-mode-map
)
243 (run-hooks 'telnet-mode-hook
))
245 ;;;###autoload (add-hook 'same-window-regexps "\\*rsh-[^-]*\\*\\(\\|<[0-9]*>\\)")
249 "Open a network login connection to host named HOST (a string).
250 Communication with HOST is recorded in a buffer `*rsh-HOST*'.
251 Normally input is edited in Emacs and sent a line at a time."
252 (interactive "sOpen rsh connection to host: ")
254 (let ((name (concat "rsh-" host
)))
255 (pop-to-buffer (make-comint name remote-shell-program nil host
))
256 (set-process-filter (get-process name
) 'telnet-initial-filter
)
258 (setq telnet-count -
16)))
262 ;;; telnet.el ends here