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 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 12;; the Free Software Foundation; either version 2, or (at your option) 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 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 40;;; Code: 41 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. 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) 51 52(defvar telnet-new-line "\r") 53(defvar telnet-mode-map nil) 54(defvar telnet-prompt-pattern "^[^#$%>\n]*[#$%>] *") 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 from telnet process while looking for password.") 64(make-variable-buffer-local 'telnet-count) 65 66(defvar telnet-rsh-program 67 (if (memq system-type '(hpux usg-unix-v)) 68 "remsh" "rsh") 69 "Program to run for opening a remote shell.") 70 71(defvar telnet-initial-count -50 72 "Initial value of `telnet-count'. Should be set to the negative of the 73number of terminal writes telnet will make setting up the host connection.") 74 75(defvar telnet-maximum-count 4 76 "Maximum value `telnet-count' can have. 77After this many passes, we stop looking for initial setup data. 78Should be set to the number of terminal writes telnet will make 79rejecting one login and prompting again for a username and password.") 80 81(defun telnet-interrupt-subjob () 82 (interactive) 83 "Interrupt the program running through telnet on the remote host." 84 (send-string nil telnet-interrupt-string)) 85 86(defun telnet-c-z () 87 (interactive) 88 (send-string nil "\C-z")) 89 90(defun send-process-next-char () 91 (interactive) 92 (send-string nil 93 (char-to-string 94 (let ((inhibit-quit t)) 95 (prog1 (read-char) 96 (setq quit-flag nil)))))) 97 98; initialization on first load. 99(if telnet-mode-map 100 nil 101 (setq telnet-mode-map (copy-keymap comint-mode-map)) 102 (define-key telnet-mode-map "\C-m" 'telnet-send-input) 103; (define-key telnet-mode-map "\C-j" 'telnet-send-input) 104 (define-key telnet-mode-map "\C-c\C-q" 'send-process-next-char) 105 (define-key telnet-mode-map "\C-c\C-c" 'telnet-interrupt-subjob) 106 (define-key telnet-mode-map "\C-c\C-z" 'telnet-c-z)) 107 108;;maybe should have a flag for when have found type 109(defun telnet-check-software-type-initialize (string) 110 "Tries to put correct initializations in. Needs work." 111 (let ((case-fold-search t)) 112 (cond ((string-match "unix" string) 113 (setq telnet-prompt-pattern comint-prompt-regexp) 114 (setq telnet-new-line "\n")) 115 ((string-match "tops-20" string) ;;maybe add telnet-replace-c-g 116 (setq telnet-prompt-pattern "[@>]*")) 117 ((string-match "its" string) 118 (setq telnet-prompt-pattern "^[^*>\n]*[*>] *")) 119 ((string-match "explorer" string) ;;explorer telnet needs work 120 (setq telnet-replace-c-g ?\n)))) 121 (setq comint-prompt-regexp telnet-prompt-pattern)) 122 123(defun telnet-initial-filter (proc string) 124 ;For reading up to and including password; also will get machine type. 125 (cond ((string-match "No such host" string) 126 (kill-buffer (process-buffer proc)) 127 (error "No such host.")) 128 ((string-match "passw" string) 129 (telnet-filter proc string) 130 (setq telnet-count 0) 131 (send-string proc (concat (comint-read-noecho "Password: " t) 132 telnet-new-line))) 133 (t (telnet-check-software-type-initialize string) 134 (telnet-filter proc string) 135 (cond ((> telnet-count telnet-maximum-count) 136 (set-process-filter proc 'telnet-filter)) 137 (t (setq telnet-count (1+ telnet-count))))))) 138 139;; Identical to comint-simple-send, except that it sends telnet-new-line 140;; instead of "\n". 141(defun telnet-simple-send (proc string) 142 (comint-send-string proc string) 143 (comint-send-string proc telnet-new-line)) 144 145(defun telnet-filter (proc string) 146 (save-excursion 147 (set-buffer (process-buffer proc)) 148 (let* ((last-insertion (marker-position (process-mark proc))) 149 (delta (- (point) last-insertion)) 150 (ie (and comint-last-input-end 151 (marker-position comint-last-input-end))) 152 (w (get-buffer-window (current-buffer))) 153 (ws (and w (window-start w)))) 154 (goto-char last-insertion) 155 (insert-before-markers string) 156 (set-marker (process-mark proc) (point)) 157 (if ws (set-window-start w ws t)) 158 (if ie (set-marker comint-last-input-end ie)) 159 (while (progn (skip-chars-backward "^\C-m" last-insertion) 160 (> (point) last-insertion)) 161 (delete-region (1- (point)) (point))) 162 (goto-char (process-mark proc)) 163 (and telnet-replace-c-g 164 (subst-char-in-region last-insertion (point) ?\C-g 165 telnet-replace-c-g t)) 166 ;; If point is after the insertion place, move it 167 ;; along with the text. 168 (if (> delta 0) 169 (goto-char (+ (process-mark proc) delta)))))) 170 171(defun telnet-send-input () 172 (interactive) 173; (comint-send-input telnet-new-line telnet-remote-echoes) 174 (comint-send-input) 175 (if telnet-remote-echoes 176 (delete-region comint-last-input-start 177 comint-last-input-end))) 178 179;;;###autoload 180(defun telnet (host) 181 "Open a network login connection to host named HOST (a string). 182Communication with HOST is recorded in a buffer *HOST-telnet*. 183Normally input is edited in Emacs and sent a line at a time." 184 (interactive "sOpen telnet connection to host: ") 185 (let* ((comint-delimiter-argument-list '(?\ ?\t)) 186 (name (concat (comint-arguments host 0 nil) "-telnet" )) 187 (buffer (get-buffer (concat "*" name "*")))) 188 (if (and buffer (get-buffer-process buffer)) 189 (switch-to-buffer (concat "*" name "*")) 190 (switch-to-buffer (make-comint name "telnet")) 191 (set-process-filter (get-process name) 'telnet-initial-filter) 192 ;; Don't send the `open' cmd till telnet is ready for it. 193 (accept-process-output (get-process name)) 194 (erase-buffer) 195 (send-string name (concat "open " host "\n")) 196 (telnet-mode) 197 (setq comint-input-sender 'telnet-simple-send) 198 (setq telnet-count telnet-initial-count)))) 199 200(defun telnet-mode () 201 "This mode is for using telnet (or rsh) from a buffer to another host. 202It has most of the same commands as comint-mode. 203There is a variable ``telnet-interrupt-string'' which is the character 204sent to try to stop execution of a job on the remote host. 205Data is sent to the remote host when RET is typed. 206 207\\{telnet-mode-map} 208" 209 (interactive) 210 (comint-mode) 211 (setq major-mode 'telnet-mode 212 mode-name "Telnet" 213 comint-prompt-regexp telnet-prompt-pattern) 214 (use-local-map telnet-mode-map) 215 (run-hooks 'telnet-mode-hook)) 216 217;;;###autoload 218(defun rsh (host) 219 "Open a network login connection to host named HOST (a string). 220Communication with HOST is recorded in a buffer *HOST-rsh*. 221Normally input is edited in Emacs and sent a line at a time." 222 (interactive "sOpen rsh connection to host: ") 223 (require 'shell) 224 (let ((name (concat host "-rsh" ))) 225 (switch-to-buffer (make-comint name telnet-rsh-program nil host)) 226 (set-process-filter (get-process name) 'telnet-initial-filter) 227 (telnet-mode) 228 (setq telnet-count -16))) 229 230(provide 'telnet) 231 232;;; telnet.el ends here 233