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8749abea GM |
1 | ;;; telnet.el --- run a telnet session from within an Emacs buffer |
2 | ||
f2e3589a | 3 | ;; Copyright (C) 1985, 1988, 1992, 1994, 2001, 2002, 2003, 2004, |
ae940284 | 4 | ;; 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
8749abea GM |
5 | |
6 | ;; Author: William F. Schelter | |
7 | ;; Maintainer: FSF | |
299248aa | 8 | ;; Keywords: unix, comm |
8749abea GM |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
874a927a | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
8749abea | 13 | ;; it under the terms of the GNU General Public License as published by |
874a927a GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
8749abea GM |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
874a927a | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
8749abea GM |
24 | |
25 | ;;; Commentary: | |
26 | ||
27 | ;; This mode is intended to be used for telnet or rsh to a remote host; | |
28 | ;; `telnet' and `rsh' are the two entry points. Multiple telnet or rsh | |
29 | ;; sessions are supported. | |
30 | ;; | |
31 | ;; Normally, input is sent to the remote telnet/rsh line-by-line, as you | |
a1506d29 | 32 | ;; type RET or LFD. C-c C-c sends a C-c to the remote immediately; |
8749abea GM |
33 | ;; C-c C-z sends C-z immediately. C-c C-q followed by any character |
34 | ;; sends that character immediately. | |
35 | ;; | |
36 | ;; All RET characters are filtered out of the output coming back from the | |
37 | ;; remote system. The mode tries to do other useful translations based | |
38 | ;; on what it sees coming back from the other system before the password | |
39 | ;; query. It knows about UNIX, ITS, TOPS-20 and Explorer systems. | |
40 | ;; | |
41 | ;; You can use the global telnet-host-properties to associate a telnet | |
42 | ;; program and login name with each host you regularly telnet to. | |
43 | ||
44 | ;;; Code: | |
45 | ||
46 | ;; to do fix software types for lispm: | |
47 | ;; to eval current expression. Also to try to send escape keys correctly. | |
48 | ;; essentially we'll want the rubout-handler off. | |
49 | ||
50 | ;; filter is simplistic but should be okay for typical shell usage. | |
51 | ;; needs hacking if it is going to deal with asynchronous output in a sane | |
52 | ;; manner | |
53 | ||
54 | (require 'comint) | |
55 | ||
56 | (defvar telnet-host-properties () | |
57 | "Specify which telnet program to use for particular hosts. | |
58 | Each element has the form (HOSTNAME PROGRAM [LOGIN-NAME]) | |
59 | HOSTNAME says which machine the element applies to. | |
60 | PROGRAM says which program to run, to talk to that machine. | |
61 | LOGIN-NAME, which is optional, says what to log in as on that machine.") | |
62 | ||
63 | (defvar telnet-new-line "\r") | |
64 | (defvar telnet-mode-map nil) | |
65 | (defvar telnet-prompt-pattern "^[^#$%>\n]*[#$%>] *") | |
66 | (defvar telnet-replace-c-g nil) | |
67 | (make-variable-buffer-local | |
68 | (defvar telnet-remote-echoes t | |
69 | "True if the telnet process will echo input.")) | |
70 | (make-variable-buffer-local | |
71 | (defvar telnet-interrupt-string "\C-c" "String sent by C-c.")) | |
72 | ||
73 | (defvar telnet-count 0 | |
74 | "Number of output strings from telnet process while looking for password.") | |
75 | (make-variable-buffer-local 'telnet-count) | |
76 | ||
77 | (defvar telnet-program "telnet" | |
78 | "Program to run to open a telnet connection.") | |
79 | ||
80 | (defvar telnet-initial-count -50 | |
81 | "Initial value of `telnet-count'. Should be set to the negative of the | |
82 | number of terminal writes telnet will make setting up the host connection.") | |
83 | ||
84 | (defvar telnet-maximum-count 4 | |
85 | "Maximum value `telnet-count' can have. | |
86 | After this many passes, we stop looking for initial setup data. | |
87 | Should be set to the number of terminal writes telnet will make | |
88 | rejecting one login and prompting again for a username and password.") | |
89 | ||
90 | (defun telnet-interrupt-subjob () | |
8749abea | 91 | "Interrupt the program running through telnet on the remote host." |
279dffd6 | 92 | (interactive) |
ff660307 | 93 | (process-send-string nil telnet-interrupt-string)) |
8749abea GM |
94 | |
95 | (defun telnet-c-z () | |
96 | (interactive) | |
ff660307 | 97 | (process-send-string nil "\C-z")) |
8749abea GM |
98 | |
99 | (defun send-process-next-char () | |
100 | (interactive) | |
ff660307 JB |
101 | (process-send-string nil |
102 | (char-to-string | |
103 | (let ((inhibit-quit t)) | |
104 | (prog1 (read-char) | |
105 | (setq quit-flag nil)))))) | |
8749abea GM |
106 | |
107 | ; initialization on first load. | |
108 | (if telnet-mode-map | |
109 | nil | |
110 | (setq telnet-mode-map (nconc (make-sparse-keymap) comint-mode-map)) | |
111 | (define-key telnet-mode-map "\C-m" 'telnet-send-input) | |
112 | ; (define-key telnet-mode-map "\C-j" 'telnet-send-input) | |
113 | (define-key telnet-mode-map "\C-c\C-q" 'send-process-next-char) | |
a1506d29 | 114 | (define-key telnet-mode-map "\C-c\C-c" 'telnet-interrupt-subjob) |
8749abea GM |
115 | (define-key telnet-mode-map "\C-c\C-z" 'telnet-c-z)) |
116 | ||
117 | ;;maybe should have a flag for when have found type | |
118 | (defun telnet-check-software-type-initialize (string) | |
119 | "Tries to put correct initializations in. Needs work." | |
120 | (let ((case-fold-search t)) | |
121 | (cond ((string-match "unix" string) | |
122 | (setq telnet-prompt-pattern comint-prompt-regexp) | |
123 | (setq telnet-new-line "\n")) | |
124 | ((string-match "tops-20" string) ;;maybe add telnet-replace-c-g | |
125 | (setq telnet-prompt-pattern "[@>]*")) | |
126 | ((string-match "its" string) | |
127 | (setq telnet-prompt-pattern "^[^*>\n]*[*>] *")) | |
128 | ((string-match "explorer" string) ;;explorer telnet needs work | |
129 | (setq telnet-replace-c-g ?\n)))) | |
130 | (setq comint-prompt-regexp telnet-prompt-pattern)) | |
131 | ||
132 | (defun telnet-initial-filter (proc string) | |
133 | ;For reading up to and including password; also will get machine type. | |
134 | (save-current-buffer | |
135 | (set-buffer (process-buffer proc)) | |
136 | (let ((case-fold-search t)) | |
137 | (cond ((string-match "No such host" string) | |
138 | (kill-buffer (process-buffer proc)) | |
139 | (error "No such host")) | |
140 | ((string-match "passw" string) | |
141 | (telnet-filter proc string) | |
142 | (setq telnet-count 0) | |
ff660307 JB |
143 | (process-send-string proc (concat (comint-read-noecho "Password: " t) |
144 | telnet-new-line)) | |
8749abea GM |
145 | (clear-this-command-keys)) |
146 | (t (telnet-check-software-type-initialize string) | |
147 | (telnet-filter proc string) | |
148 | (cond ((> telnet-count telnet-maximum-count) | |
149 | (set-process-filter proc 'telnet-filter)) | |
150 | (t (setq telnet-count (1+ telnet-count))))))))) | |
151 | ||
152 | ;; Identical to comint-simple-send, except that it sends telnet-new-line | |
153 | ;; instead of "\n". | |
154 | (defun telnet-simple-send (proc string) | |
155 | (comint-send-string proc string) | |
732576c8 | 156 | (if comint-input-sender-no-newline |
ff78c721 | 157 | (if (not (string-equal string "")) |
732576c8 RS |
158 | (process-send-eof)) |
159 | (comint-send-string proc telnet-new-line))) | |
8749abea GM |
160 | |
161 | (defun telnet-filter (proc string) | |
a1562258 | 162 | (with-current-buffer (process-buffer proc) |
8749abea GM |
163 | (let* ((last-insertion (marker-position (process-mark proc))) |
164 | (delta (- (point) last-insertion)) | |
165 | (ie (and comint-last-input-end | |
166 | (marker-position comint-last-input-end))) | |
167 | (w (get-buffer-window (current-buffer))) | |
168 | (ws (and w (window-start w)))) | |
169 | (goto-char last-insertion) | |
a1562258 | 170 | (insert string) |
8749abea GM |
171 | (set-marker comint-last-output-start last-insertion) |
172 | (set-marker (process-mark proc) (point)) | |
173 | (if ws (set-window-start w ws t)) | |
174 | (if ie (set-marker comint-last-input-end ie)) | |
175 | (while (progn (skip-chars-backward "^\C-m" last-insertion) | |
176 | (> (point) last-insertion)) | |
177 | (delete-region (1- (point)) (point))) | |
178 | (goto-char (process-mark proc)) | |
179 | (and telnet-replace-c-g | |
180 | (subst-char-in-region last-insertion (point) ?\C-g | |
181 | telnet-replace-c-g t)) | |
182 | ;; If point is after the insertion place, move it | |
183 | ;; along with the text. | |
184 | (if (> delta 0) | |
185 | (goto-char (+ (process-mark proc) delta)))))) | |
186 | ||
187 | (defun telnet-send-input () | |
188 | (interactive) | |
189 | ; (comint-send-input telnet-new-line telnet-remote-echoes) | |
190 | (comint-send-input) | |
191 | (if telnet-remote-echoes | |
192 | (delete-region comint-last-input-start | |
193 | comint-last-input-end))) | |
194 | ||
6bdad9ae | 195 | ;;;###autoload (add-hook 'same-window-regexps (purecopy "\\*telnet-.*\\*\\(\\|<[0-9]+>\\)")) |
8749abea GM |
196 | |
197 | ;;;###autoload | |
8fb5d2f1 | 198 | (defun telnet (host &optional port) |
8749abea | 199 | "Open a network login connection to host named HOST (a string). |
8fb5d2f1 KS |
200 | Optional arg PORT specifies alternative port to connect to. |
201 | Interactively, use \\[universal-argument] prefix to be prompted for port number. | |
202 | ||
8749abea GM |
203 | Communication with HOST is recorded in a buffer `*PROGRAM-HOST*' |
204 | where PROGRAM is the telnet program being used. This program | |
205 | is controlled by the contents of the global variable `telnet-host-properties', | |
206 | falling back on the value of the global variable `telnet-program'. | |
207 | Normally input is edited in Emacs and sent a line at a time." | |
8fb5d2f1 KS |
208 | (interactive (list (read-string "Open connection to host: ") |
209 | (cond | |
210 | ((null current-prefix-arg) nil) | |
211 | ((consp current-prefix-arg) (read-string "Port: ")) | |
212 | (t (prefix-numeric-value current-prefix-arg))))) | |
213 | (if (and port (numberp port)) | |
214 | (setq port (int-to-string port))) | |
8749abea GM |
215 | (let* ((comint-delimiter-argument-list '(?\ ?\t)) |
216 | (properties (cdr (assoc host telnet-host-properties))) | |
217 | (telnet-program (if properties (car properties) telnet-program)) | |
8fb5d2f1 KS |
218 | (hname (if port (concat host ":" port) host)) |
219 | (name (concat telnet-program "-" (comint-arguments hname 0 nil) )) | |
8749abea GM |
220 | (buffer (get-buffer (concat "*" name "*"))) |
221 | (telnet-options (if (cdr properties) (cons "-l" (cdr properties)))) | |
222 | process) | |
223 | (if (and buffer (get-buffer-process buffer)) | |
224 | (pop-to-buffer (concat "*" name "*")) | |
a1506d29 | 225 | (pop-to-buffer |
8749abea GM |
226 | (apply 'make-comint name telnet-program nil telnet-options)) |
227 | (setq process (get-buffer-process (current-buffer))) | |
228 | (set-process-filter process 'telnet-initial-filter) | |
229 | ;; Don't send the `open' cmd till telnet is ready for it. | |
230 | (accept-process-output process) | |
231 | (erase-buffer) | |
ff660307 JB |
232 | (process-send-string process (concat "open " host |
233 | (if port " " "") (or port "") | |
234 | "\n")) | |
8749abea GM |
235 | (telnet-mode) |
236 | (setq comint-input-sender 'telnet-simple-send) | |
237 | (setq telnet-count telnet-initial-count)))) | |
238 | ||
239 | (put 'telnet-mode 'mode-class 'special) | |
240 | ||
46554de4 | 241 | (define-derived-mode telnet-mode comint-mode "Telnet" |
8749abea GM |
242 | "This mode is for using telnet (or rsh) from a buffer to another host. |
243 | It has most of the same commands as comint-mode. | |
244 | There is a variable ``telnet-interrupt-string'' which is the character | |
245 | sent to try to stop execution of a job on the remote host. | |
46554de4 | 246 | Data is sent to the remote host when RET is typed." |
a1562258 | 247 | (set (make-local-variable 'window-point-insertion-type) t) |
3ff67968 | 248 | (set (make-local-variable 'comint-prompt-regexp) telnet-prompt-pattern) |
14f7b89d | 249 | (set (make-local-variable 'comint-use-prompt-regexp) t)) |
8749abea | 250 | |
6bdad9ae | 251 | ;;;###autoload (add-hook 'same-window-regexps (purecopy "\\*rsh-[^-]*\\*\\(\\|<[0-9]*>\\)")) |
8749abea GM |
252 | |
253 | ;;;###autoload | |
254 | (defun rsh (host) | |
255 | "Open a network login connection to host named HOST (a string). | |
256 | Communication with HOST is recorded in a buffer `*rsh-HOST*'. | |
257 | Normally input is edited in Emacs and sent a line at a time." | |
258 | (interactive "sOpen rsh connection to host: ") | |
259 | (require 'shell) | |
260 | (let ((name (concat "rsh-" host ))) | |
261 | (pop-to-buffer (make-comint name remote-shell-program nil host)) | |
262 | (set-process-filter (get-process name) 'telnet-initial-filter) | |
263 | (telnet-mode) | |
264 | (setq telnet-count -16))) | |
265 | ||
266 | (provide 'telnet) | |
267 | ||
cbee283d | 268 | ;; arch-tag: 98218821-d04a-48b6-9058-57d0d4677a56 |
8749abea | 269 | ;;; telnet.el ends here |