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c88ab9ce | 1 | ;;; telnet.el --- run a telnet session from within an Emacs buffer |
22a89ee8 | 2 | |
58142744 ER |
3 | ;;; Copyright (C) 1985, 1988, 1992 Free Software Foundation, Inc. |
4 | ||
22a89ee8 ER |
5 | ;; Author: William F. Schelter |
6 | ;; Maintainer: FSF | |
1d23795a | 7 | |
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
492878e4 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
1d23795a | 13 | ;; any later version. |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
22 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
b5014350 ER |
24 | ;;; Commentary: |
25 | ||
26 | ;; This mode is intended to be used for telnet or rsh to a remode host; | |
27 | ;; `telnet' and `rsh' are the two entry points. Multiple telnet or rsh | |
28 | ;; sessions are supported. | |
29 | ;; | |
30 | ;; Normally, input is sent to the remote telnet/rsh line-by-line, as you | |
31 | ;; type RET or LFD. C-c C-c sends a C-c to the remote immediately; | |
32 | ;; C-c C-z sends C-z immediately. C-c C-q followed by any character | |
33 | ;; sends that character immediately. | |
34 | ;; | |
35 | ;; All RET characters are filtered out of the output coming back from the | |
36 | ;; remote system. The mode tries to do other useful translations based | |
37 | ;; on what it sees coming back from the other system before the password | |
38 | ;; query. It knows about UNIX, ITS, TOPS-20 and Explorer systems. | |
39 | ||
22a89ee8 | 40 | ;;; Code: |
1d23795a | 41 | |
b5014350 ER |
42 | ;; to do fix software types for lispm: |
43 | ;; to eval current expression. Also to try to send escape keys correctly. | |
44 | ;; essentially we'll want the rubout-handler off. | |
1d23795a | 45 | |
46 | ;; filter is simplistic but should be okay for typical shell usage. | |
47 | ;; needs hacking if it is going to deal with asynchronous output in a sane | |
48 | ;; manner | |
49 | ||
50 | (require 'comint) | |
492878e4 | 51 | |
1d23795a | 52 | (defvar telnet-new-line "\r") |
53 | (defvar telnet-mode-map nil) | |
54 | (defvar telnet-prompt-pattern "^[^#$%>]*[#$%>] *") | |
55 | (defvar telnet-replace-c-g nil) | |
56 | (make-variable-buffer-local | |
57 | (defvar telnet-remote-echoes t | |
58 | "True if the telnet process will echo input.")) | |
59 | (make-variable-buffer-local | |
60 | (defvar telnet-interrupt-string "\C-c" "String sent by C-c.")) | |
61 | ||
62 | (defvar telnet-count 0 | |
63 | "Number of output strings read from the telnet process | |
64 | while looking for the initial password.") | |
65 | ||
66 | (defvar telnet-initial-count -50 | |
1433a222 | 67 | "Initial value of `telnet-count'. Should be set to the negative of the |
1d23795a | 68 | number of terminal writes telnet will make setting up the host connection.") |
69 | ||
70 | (defvar telnet-maximum-count 4 | |
1433a222 | 71 | "Maximum value `telnet-count' can have. |
1d23795a | 72 | After this many passes, we stop looking for initial setup data. |
73 | Should be set to the number of terminal writes telnet will make | |
74 | rejecting one login and prompting for the again for a username and password.") | |
75 | ||
76 | (defun telnet-interrupt-subjob () | |
77 | (interactive) | |
78 | "Interrupt the program running through telnet on the remote host." | |
79 | (send-string nil telnet-interrupt-string)) | |
80 | ||
81 | (defun telnet-c-z () | |
82 | (interactive) | |
83 | (send-string nil "\C-z")) | |
84 | ||
85 | (defun send-process-next-char () | |
86 | (interactive) | |
87 | (send-string nil | |
88 | (char-to-string | |
89 | (let ((inhibit-quit t)) | |
90 | (prog1 (read-char) | |
91 | (setq quit-flag nil)))))) | |
92 | ||
93 | ; initialization on first load. | |
94 | (if telnet-mode-map | |
95 | nil | |
96 | (setq telnet-mode-map (copy-keymap comint-mode-map)) | |
97 | (define-key telnet-mode-map "\C-m" 'telnet-send-input) | |
98 | ; (define-key telnet-mode-map "\C-j" 'telnet-send-input) | |
99 | (define-key telnet-mode-map "\C-c\C-q" 'send-process-next-char) | |
100 | (define-key telnet-mode-map "\C-c\C-c" 'telnet-interrupt-subjob) | |
101 | (define-key telnet-mode-map "\C-c\C-z" 'telnet-c-z)) | |
102 | ||
103 | ;;maybe should have a flag for when have found type | |
104 | (defun telnet-check-software-type-initialize (string) | |
105 | "Tries to put correct initializations in. Needs work." | |
106 | (let ((case-fold-search t)) | |
107 | (cond ((string-match "unix" string) | |
108 | (setq telnet-prompt-pattern comint-prompt-regexp) | |
109 | (setq telnet-new-line "\n")) | |
110 | ((string-match "tops-20" string) ;;maybe add telnet-replace-c-g | |
111 | (setq telnet-prompt-pattern "[@>]*")) | |
112 | ((string-match "its" string) | |
113 | (setq telnet-prompt-pattern "^[^*>]*[*>] *")) | |
114 | ((string-match "explorer" string) ;;explorer telnet needs work | |
115 | (setq telnet-replace-c-g ?\n)))) | |
116 | (setq comint-prompt-regexp telnet-prompt-pattern)) | |
117 | ||
118 | (defun telnet-initial-filter (proc string) | |
119 | ;For reading up to and including password; also will get machine type. | |
120 | (cond ((string-match "No such host" string) | |
121 | (kill-buffer (process-buffer proc)) | |
122 | (error "No such host.")) | |
123 | ((string-match "passw" string) | |
124 | (telnet-filter proc string) | |
125 | (let* ((echo-keystrokes 0) | |
126 | (password (read-password))) | |
127 | (setq telnet-count 0) | |
128 | (send-string proc (concat password telnet-new-line)))) | |
129 | (t (telnet-check-software-type-initialize string) | |
130 | (telnet-filter proc string) | |
131 | (cond ((> telnet-count telnet-maximum-count) | |
132 | (set-process-filter proc 'telnet-filter)) | |
133 | (t (setq telnet-count (1+ telnet-count))))))) | |
134 | ||
135 | (defun telnet-filter (proc string) | |
136 | (let ((at-end | |
137 | (and (eq (process-buffer proc) (current-buffer)) | |
138 | (= (point) (point-max))))) | |
139 | (save-excursion | |
140 | (set-buffer (process-buffer proc)) | |
141 | (goto-char (process-mark proc)) | |
142 | (let ((now (point))) | |
492878e4 | 143 | ;; Insert STRING, omitting all C-m characters. |
1d23795a | 144 | (let ((index 0) c-m) |
145 | (while (setq c-m (string-match "\C-m" string index)) | |
146 | (insert-before-markers (substring string index c-m)) | |
147 | (setq index (1+ c-m))) | |
148 | (insert-before-markers (substring string index))) | |
149 | (and telnet-replace-c-g | |
150 | (subst-char-in-region now (point) ?\C-g telnet-replace-c-g))) | |
151 | ; (if (and (integer-or-marker-p last-input-start) | |
152 | ; (marker-position last-input-start) | |
153 | ; telnet-remote-echoes) | |
154 | ; (delete-region last-input-start last-input-end)) | |
155 | ) | |
156 | (if at-end | |
157 | (goto-char (point-max))))) | |
158 | ||
159 | (defun telnet-send-input () | |
160 | (interactive) | |
492878e4 JB |
161 | ; (comint-send-input telnet-new-line telnet-remote-echoes) |
162 | (comint-send-input) | |
163 | (if telnet-remote-echoes | |
164 | (delete-region comint-last-input-start | |
165 | comint-last-input-end))) | |
1d23795a | 166 | |
f9f9507e | 167 | ;;;###autoload |
1d23795a | 168 | (defun telnet (arg) |
169 | "Open a network login connection to host named HOST (a string). | |
170 | Communication with HOST is recorded in a buffer *HOST-telnet*. | |
171 | Normally input is edited in Emacs and sent a line at a time." | |
172 | (interactive "sOpen telnet connection to host: ") | |
173 | (let ((name (concat arg "-telnet" ))) | |
174 | (switch-to-buffer (make-comint name "telnet")) | |
175 | (set-process-filter (get-process name) 'telnet-initial-filter) | |
2a015363 RS |
176 | ;; Don't send the `open' cmd till telnet is ready for it. |
177 | (accept-process-output (get-process name)) | |
628ed366 | 178 | (erase-buffer) |
1d23795a | 179 | (send-string name (concat "open " arg "\n")) |
180 | (telnet-mode) | |
181 | (setq telnet-count telnet-initial-count))) | |
182 | ||
183 | (defun telnet-mode () | |
b5014350 | 184 | "This mode is for using telnet (or rsh) from a buffer to another host. |
1433a222 | 185 | It has most of the same commands as comint-mode. |
1d23795a | 186 | There is a variable ``telnet-interrupt-string'' which is the character |
187 | sent to try to stop execution of a job on the remote host. | |
188 | Data is sent to the remote host when RET is typed. | |
189 | ||
190 | \\{telnet-mode-map} | |
b5014350 | 191 | " |
1d23795a | 192 | (interactive) |
193 | (comint-mode) | |
194 | (setq major-mode 'telnet-mode | |
195 | mode-name "Telnet" | |
196 | comint-prompt-regexp telnet-prompt-pattern) | |
197 | (use-local-map telnet-mode-map) | |
198 | (run-hooks 'telnet-mode-hook)) | |
199 | ||
b5014350 ER |
200 | ;;;###autoload |
201 | (defun rsh (arg) | |
202 | "Open a network login connection to host named HOST (a string). | |
203 | Communication with HOST is recorded in a buffer *HOST-rsh*. | |
204 | Normally input is edited in Emacs and sent a line at a time." | |
205 | (interactive "sOpen rsh connection to host: ") | |
206 | (require 'shell) | |
207 | (let ((name (concat arg "-rsh" ))) | |
208 | (switch-to-buffer (make-comint name "rsh")) | |
209 | (set-process-filter (get-process name) 'telnet-initial-filter) | |
210 | (telnet-mode) | |
211 | (setq telnet-count -16))) | |
212 | ||
1d23795a | 213 | (defun read-password () |
214 | (let ((answ "") tem) | |
215 | (message "Reading password...") | |
94a861b5 JB |
216 | (while (prog1 (not (memq (setq tem (read-char)) '(?\C-m ?\n ?\C-g))) |
217 | (setq quit-flag nil)) | |
1d23795a | 218 | (setq answ (concat answ (char-to-string tem)))) |
219 | answ)) | |
49116ac0 JB |
220 | |
221 | (provide 'telnet) | |
222 | ||
c88ab9ce | 223 | ;;; telnet.el ends here |