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1 | ;;; telnet.el --- run a telnet session from within an Emacs buffer |
2 | ||
3 | ;; Copyright (C) 1985, 1988, 1992, 1994 Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: William F. Schelter | |
6 | ;; Maintainer: FSF | |
299248aa | 7 | ;; Keywords: unix, comm |
8749abea GM |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
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) | |
14 | ;; any later version. | |
15 | ||
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. | |
20 | ||
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. | |
25 | ||
26 | ;;; Commentary: | |
27 | ||
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. | |
31 | ;; | |
32 | ;; Normally, input is sent to the remote telnet/rsh line-by-line, as you | |
a1506d29 | 33 | ;; type RET or LFD. C-c C-c sends a C-c to the remote immediately; |
8749abea GM |
34 | ;; C-c C-z sends C-z immediately. C-c C-q followed by any character |
35 | ;; sends that character immediately. | |
36 | ;; | |
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. | |
41 | ;; | |
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. | |
44 | ||
45 | ;;; Code: | |
46 | ||
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. | |
50 | ||
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 | |
53 | ;; manner | |
54 | ||
55 | (require 'comint) | |
56 | ||
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.") | |
63 | ||
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.")) | |
73 | ||
74 | (defvar telnet-count 0 | |
75 | "Number of output strings from telnet process while looking for password.") | |
76 | (make-variable-buffer-local 'telnet-count) | |
77 | ||
78 | (defvar telnet-program "telnet" | |
79 | "Program to run to open a telnet connection.") | |
80 | ||
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.") | |
84 | ||
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.") | |
90 | ||
91 | (defun telnet-interrupt-subjob () | |
92 | (interactive) | |
93 | "Interrupt the program running through telnet on the remote host." | |
94 | (send-string nil telnet-interrupt-string)) | |
95 | ||
96 | (defun telnet-c-z () | |
97 | (interactive) | |
98 | (send-string nil "\C-z")) | |
99 | ||
100 | (defun send-process-next-char () | |
101 | (interactive) | |
102 | (send-string nil | |
103 | (char-to-string | |
104 | (let ((inhibit-quit t)) | |
105 | (prog1 (read-char) | |
106 | (setq quit-flag nil)))))) | |
107 | ||
108 | ; initialization on first load. | |
109 | (if telnet-mode-map | |
110 | nil | |
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) | |
a1506d29 | 115 | (define-key telnet-mode-map "\C-c\C-c" 'telnet-interrupt-subjob) |
8749abea GM |
116 | (define-key telnet-mode-map "\C-c\C-z" 'telnet-c-z)) |
117 | ||
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)) | |
132 | ||
133 | (defun telnet-initial-filter (proc string) | |
134 | ;For reading up to and including password; also will get machine type. | |
135 | (save-current-buffer | |
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) | |
145 | telnet-new-line)) | |
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))))))))) | |
152 | ||
153 | ;; Identical to comint-simple-send, except that it sends telnet-new-line | |
154 | ;; instead of "\n". | |
155 | (defun telnet-simple-send (proc string) | |
156 | (comint-send-string proc string) | |
732576c8 | 157 | (if comint-input-sender-no-newline |
ff78c721 | 158 | (if (not (string-equal string "")) |
732576c8 RS |
159 | (process-send-eof)) |
160 | (comint-send-string proc telnet-new-line))) | |
8749abea GM |
161 | |
162 | (defun telnet-filter (proc string) | |
163 | (save-excursion | |
164 | (set-buffer (process-buffer proc)) | |
165 | (let* ((last-insertion (marker-position (process-mark proc))) | |
166 | (delta (- (point) last-insertion)) | |
167 | (ie (and comint-last-input-end | |
168 | (marker-position comint-last-input-end))) | |
169 | (w (get-buffer-window (current-buffer))) | |
170 | (ws (and w (window-start w)))) | |
171 | (goto-char last-insertion) | |
172 | (insert-before-markers string) | |
173 | (set-marker comint-last-output-start last-insertion) | |
174 | (set-marker (process-mark proc) (point)) | |
175 | (if ws (set-window-start w ws t)) | |
176 | (if ie (set-marker comint-last-input-end ie)) | |
177 | (while (progn (skip-chars-backward "^\C-m" last-insertion) | |
178 | (> (point) last-insertion)) | |
179 | (delete-region (1- (point)) (point))) | |
180 | (goto-char (process-mark proc)) | |
181 | (and telnet-replace-c-g | |
182 | (subst-char-in-region last-insertion (point) ?\C-g | |
183 | telnet-replace-c-g t)) | |
184 | ;; If point is after the insertion place, move it | |
185 | ;; along with the text. | |
186 | (if (> delta 0) | |
187 | (goto-char (+ (process-mark proc) delta)))))) | |
188 | ||
189 | (defun telnet-send-input () | |
190 | (interactive) | |
191 | ; (comint-send-input telnet-new-line telnet-remote-echoes) | |
192 | (comint-send-input) | |
193 | (if telnet-remote-echoes | |
194 | (delete-region comint-last-input-start | |
195 | comint-last-input-end))) | |
196 | ||
197 | ;;;###autoload (add-hook 'same-window-regexps "\\*telnet-.*\\*\\(\\|<[0-9]+>\\)") | |
198 | ||
199 | ;;;###autoload | |
200 | (defun telnet (host) | |
201 | "Open a network login connection to host named HOST (a string). | |
202 | Communication with HOST is recorded in a buffer `*PROGRAM-HOST*' | |
203 | where PROGRAM is the telnet program being used. This program | |
204 | is controlled by the contents of the global variable `telnet-host-properties', | |
205 | falling back on the value of the global variable `telnet-program'. | |
206 | Normally input is edited in Emacs and sent a line at a time." | |
207 | (interactive "sOpen connection to host: ") | |
208 | (let* ((comint-delimiter-argument-list '(?\ ?\t)) | |
209 | (properties (cdr (assoc host telnet-host-properties))) | |
210 | (telnet-program (if properties (car properties) telnet-program)) | |
211 | (name (concat telnet-program "-" (comint-arguments host 0 nil) )) | |
212 | (buffer (get-buffer (concat "*" name "*"))) | |
213 | (telnet-options (if (cdr properties) (cons "-l" (cdr properties)))) | |
214 | process) | |
215 | (if (and buffer (get-buffer-process buffer)) | |
216 | (pop-to-buffer (concat "*" name "*")) | |
a1506d29 | 217 | (pop-to-buffer |
8749abea GM |
218 | (apply 'make-comint name telnet-program nil telnet-options)) |
219 | (setq process (get-buffer-process (current-buffer))) | |
220 | (set-process-filter process 'telnet-initial-filter) | |
221 | ;; Don't send the `open' cmd till telnet is ready for it. | |
222 | (accept-process-output process) | |
223 | (erase-buffer) | |
224 | (send-string process (concat "open " host "\n")) | |
225 | (telnet-mode) | |
226 | (setq comint-input-sender 'telnet-simple-send) | |
227 | (setq telnet-count telnet-initial-count)))) | |
228 | ||
229 | (put 'telnet-mode 'mode-class 'special) | |
230 | ||
231 | (defun telnet-mode () | |
232 | "This mode is for using telnet (or rsh) from a buffer to another host. | |
233 | It has most of the same commands as comint-mode. | |
234 | There is a variable ``telnet-interrupt-string'' which is the character | |
235 | sent to try to stop execution of a job on the remote host. | |
236 | Data is sent to the remote host when RET is typed. | |
237 | ||
238 | \\{telnet-mode-map} | |
239 | " | |
240 | (interactive) | |
241 | (comint-mode) | |
242 | (setq major-mode 'telnet-mode | |
243 | mode-name "Telnet" | |
244 | comint-prompt-regexp telnet-prompt-pattern) | |
245 | (use-local-map telnet-mode-map) | |
246 | (run-hooks 'telnet-mode-hook)) | |
247 | ||
248 | ;;;###autoload (add-hook 'same-window-regexps "\\*rsh-[^-]*\\*\\(\\|<[0-9]*>\\)") | |
249 | ||
250 | ;;;###autoload | |
251 | (defun rsh (host) | |
252 | "Open a network login connection to host named HOST (a string). | |
253 | Communication with HOST is recorded in a buffer `*rsh-HOST*'. | |
254 | Normally input is edited in Emacs and sent a line at a time." | |
255 | (interactive "sOpen rsh connection to host: ") | |
256 | (require 'shell) | |
257 | (let ((name (concat "rsh-" host ))) | |
258 | (pop-to-buffer (make-comint name remote-shell-program nil host)) | |
259 | (set-process-filter (get-process name) 'telnet-initial-filter) | |
260 | (telnet-mode) | |
261 | (setq telnet-count -16))) | |
262 | ||
263 | (provide 'telnet) | |
264 | ||
265 | ;;; telnet.el ends here |