1;;; telnet.el --- run a telnet session from within an Emacs buffer 2 3;; Copyright (C) 1985, 1988, 1992, 1994, 2001, 2002, 2003, 2004, 4;; 2005, 2006, 2007 Free Software Foundation, Inc. 5 6;; Author: William F. Schelter 7;; Maintainer: FSF 8;; Keywords: unix, comm 9 10;; This file is part of GNU Emacs. 11 12;; GNU Emacs is free software; you can redistribute it and/or modify 13;; it under the terms of the GNU General Public License as published by 14;; the Free Software Foundation; either version 2, or (at your option) 15;; any later version. 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 23;; along with GNU Emacs; see the file COPYING. If not, write to the 24;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 25;; Boston, MA 02110-1301, USA. 26 27;;; Commentary: 28 29;; This mode is intended to be used for telnet or rsh to a remote host; 30;; `telnet' and `rsh' are the two entry points. Multiple telnet or rsh 31;; sessions are supported. 32;; 33;; Normally, input is sent to the remote telnet/rsh line-by-line, as you 34;; type RET or LFD. C-c C-c sends a C-c to the remote immediately; 35;; C-c C-z sends C-z immediately. C-c C-q followed by any character 36;; sends that character immediately. 37;; 38;; All RET characters are filtered out of the output coming back from the 39;; remote system. The mode tries to do other useful translations based 40;; on what it sees coming back from the other system before the password 41;; query. It knows about UNIX, ITS, TOPS-20 and Explorer systems. 42;; 43;; You can use the global telnet-host-properties to associate a telnet 44;; program and login name with each host you regularly telnet to. 45 46;;; Code: 47 48;; to do fix software types for lispm: 49;; to eval current expression. Also to try to send escape keys correctly. 50;; essentially we'll want the rubout-handler off. 51 52;; filter is simplistic but should be okay for typical shell usage. 53;; needs hacking if it is going to deal with asynchronous output in a sane 54;; manner 55 56(require 'comint) 57 58(defvar telnet-host-properties () 59 "Specify which telnet program to use for particular hosts. 60Each element has the form (HOSTNAME PROGRAM [LOGIN-NAME]) 61HOSTNAME says which machine the element applies to. 62PROGRAM says which program to run, to talk to that machine. 63LOGIN-NAME, which is optional, says what to log in as on that machine.") 64 65(defvar telnet-new-line "\r") 66(defvar telnet-mode-map nil) 67(defvar telnet-prompt-pattern "^[^#$%>\n]*[#$%>] *") 68(defvar telnet-replace-c-g nil) 69(make-variable-buffer-local 70 (defvar telnet-remote-echoes t 71 "True if the telnet process will echo input.")) 72(make-variable-buffer-local 73 (defvar telnet-interrupt-string "\C-c" "String sent by C-c.")) 74 75(defvar telnet-count 0 76 "Number of output strings from telnet process while looking for password.") 77(make-variable-buffer-local 'telnet-count) 78 79(defvar telnet-program "telnet" 80 "Program to run to open a telnet connection.") 81 82(defvar telnet-initial-count -50 83 "Initial value of `telnet-count'. Should be set to the negative of the 84number of terminal writes telnet will make setting up the host connection.") 85 86(defvar telnet-maximum-count 4 87 "Maximum value `telnet-count' can have. 88After this many passes, we stop looking for initial setup data. 89Should be set to the number of terminal writes telnet will make 90rejecting one login and prompting again for a username and password.") 91 92(defun telnet-interrupt-subjob () 93 "Interrupt the program running through telnet on the remote host." 94 (interactive) 95 (process-send-string nil telnet-interrupt-string)) 96 97(defun telnet-c-z () 98 (interactive) 99 (process-send-string nil "\C-z")) 100 101(defun send-process-next-char () 102 (interactive) 103 (process-send-string nil 104 (char-to-string 105 (let ((inhibit-quit t)) 106 (prog1 (read-char) 107 (setq quit-flag nil)))))) 108 109; initialization on first load. 110(if telnet-mode-map 111 nil 112 (setq telnet-mode-map (nconc (make-sparse-keymap) comint-mode-map)) 113 (define-key telnet-mode-map "\C-m" 'telnet-send-input) 114; (define-key telnet-mode-map "\C-j" 'telnet-send-input) 115 (define-key telnet-mode-map "\C-c\C-q" 'send-process-next-char) 116 (define-key telnet-mode-map "\C-c\C-c" 'telnet-interrupt-subjob) 117 (define-key telnet-mode-map "\C-c\C-z" 'telnet-c-z)) 118 119;;maybe should have a flag for when have found type 120(defun telnet-check-software-type-initialize (string) 121 "Tries to put correct initializations in. Needs work." 122 (let ((case-fold-search t)) 123 (cond ((string-match "unix" string) 124 (setq telnet-prompt-pattern comint-prompt-regexp) 125 (setq telnet-new-line "\n")) 126 ((string-match "tops-20" string) ;;maybe add telnet-replace-c-g 127 (setq telnet-prompt-pattern "[@>]*")) 128 ((string-match "its" string) 129 (setq telnet-prompt-pattern "^[^*>\n]*[*>] *")) 130 ((string-match "explorer" string) ;;explorer telnet needs work 131 (setq telnet-replace-c-g ?\n)))) 132 (setq comint-prompt-regexp telnet-prompt-pattern)) 133 134(defun telnet-initial-filter (proc string) 135 ;For reading up to and including password; also will get machine type. 136 (save-current-buffer 137 (set-buffer (process-buffer proc)) 138 (let ((case-fold-search t)) 139 (cond ((string-match "No such host" string) 140 (kill-buffer (process-buffer proc)) 141 (error "No such host")) 142 ((string-match "passw" string) 143 (telnet-filter proc string) 144 (setq telnet-count 0) 145 (process-send-string proc (concat (comint-read-noecho "Password: " t) 146 telnet-new-line)) 147 (clear-this-command-keys)) 148 (t (telnet-check-software-type-initialize string) 149 (telnet-filter proc string) 150 (cond ((> telnet-count telnet-maximum-count) 151 (set-process-filter proc 'telnet-filter)) 152 (t (setq telnet-count (1+ telnet-count))))))))) 153 154;; Identical to comint-simple-send, except that it sends telnet-new-line 155;; instead of "\n". 156(defun telnet-simple-send (proc string) 157 (comint-send-string proc string) 158 (if comint-input-sender-no-newline 159 (if (not (string-equal string "")) 160 (process-send-eof)) 161 (comint-send-string proc telnet-new-line))) 162 163(defun telnet-filter (proc string) 164 (save-excursion 165 (set-buffer (process-buffer proc)) 166 (let* ((last-insertion (marker-position (process-mark proc))) 167 (delta (- (point) last-insertion)) 168 (ie (and comint-last-input-end 169 (marker-position comint-last-input-end))) 170 (w (get-buffer-window (current-buffer))) 171 (ws (and w (window-start w)))) 172 (goto-char last-insertion) 173 (insert-before-markers string) 174 (set-marker comint-last-output-start last-insertion) 175 (set-marker (process-mark proc) (point)) 176 (if ws (set-window-start w ws t)) 177 (if ie (set-marker comint-last-input-end ie)) 178 (while (progn (skip-chars-backward "^\C-m" last-insertion) 179 (> (point) last-insertion)) 180 (delete-region (1- (point)) (point))) 181 (goto-char (process-mark proc)) 182 (and telnet-replace-c-g 183 (subst-char-in-region last-insertion (point) ?\C-g 184 telnet-replace-c-g t)) 185 ;; If point is after the insertion place, move it 186 ;; along with the text. 187 (if (> delta 0) 188 (goto-char (+ (process-mark proc) delta)))))) 189 190(defun telnet-send-input () 191 (interactive) 192; (comint-send-input telnet-new-line telnet-remote-echoes) 193 (comint-send-input) 194 (if telnet-remote-echoes 195 (delete-region comint-last-input-start 196 comint-last-input-end))) 197 198;;;###autoload (add-hook 'same-window-regexps "\\*telnet-.*\\*\\(\\|<[0-9]+>\\)") 199 200;;;###autoload 201(defun telnet (host &optional port) 202 "Open a network login connection to host named HOST (a string). 203Optional arg PORT specifies alternative port to connect to. 204Interactively, use \\[universal-argument] prefix to be prompted for port number. 205 206Communication with HOST is recorded in a buffer `*PROGRAM-HOST*' 207where PROGRAM is the telnet program being used. This program 208is controlled by the contents of the global variable `telnet-host-properties', 209falling back on the value of the global variable `telnet-program'. 210Normally input is edited in Emacs and sent a line at a time." 211 (interactive (list (read-string "Open connection to host: ") 212 (cond 213 ((null current-prefix-arg) nil) 214 ((consp current-prefix-arg) (read-string "Port: ")) 215 (t (prefix-numeric-value current-prefix-arg))))) 216 (if (and port (numberp port)) 217 (setq port (int-to-string port))) 218 (let* ((comint-delimiter-argument-list '(?\ ?\t)) 219 (properties (cdr (assoc host telnet-host-properties))) 220 (telnet-program (if properties (car properties) telnet-program)) 221 (hname (if port (concat host ":" port) host)) 222 (name (concat telnet-program "-" (comint-arguments hname 0 nil) )) 223 (buffer (get-buffer (concat "*" name "*"))) 224 (telnet-options (if (cdr properties) (cons "-l" (cdr properties)))) 225 process) 226 (if (and buffer (get-buffer-process buffer)) 227 (pop-to-buffer (concat "*" name "*")) 228 (pop-to-buffer 229 (apply 'make-comint name telnet-program nil telnet-options)) 230 (setq process (get-buffer-process (current-buffer))) 231 (set-process-filter process 'telnet-initial-filter) 232 ;; Don't send the `open' cmd till telnet is ready for it. 233 (accept-process-output process) 234 (erase-buffer) 235 (process-send-string process (concat "open " host 236 (if port " " "") (or port "") 237 "\n")) 238 (telnet-mode) 239 (setq comint-input-sender 'telnet-simple-send) 240 (setq telnet-count telnet-initial-count)))) 241 242(put 'telnet-mode 'mode-class 'special) 243 244(define-derived-mode telnet-mode comint-mode "Telnet" 245 "This mode is for using telnet (or rsh) from a buffer to another host. 246It has most of the same commands as comint-mode. 247There is a variable ``telnet-interrupt-string'' which is the character 248sent to try to stop execution of a job on the remote host. 249Data is sent to the remote host when RET is typed." 250 (set (make-local-variable 'comint-prompt-regexp) telnet-prompt-pattern)) 251 252;;;###autoload (add-hook 'same-window-regexps "\\*rsh-[^-]*\\*\\(\\|<[0-9]*>\\)") 253 254;;;###autoload 255(defun rsh (host) 256 "Open a network login connection to host named HOST (a string). 257Communication with HOST is recorded in a buffer `*rsh-HOST*'. 258Normally input is edited in Emacs and sent a line at a time." 259 (interactive "sOpen rsh connection to host: ") 260 (require 'shell) 261 (let ((name (concat "rsh-" host ))) 262 (pop-to-buffer (make-comint name remote-shell-program nil host)) 263 (set-process-filter (get-process name) 'telnet-initial-filter) 264 (telnet-mode) 265 (setq telnet-count -16))) 266 267(provide 'telnet) 268 269;;; arch-tag: 98218821-d04a-48b6-9058-57d0d4677a56 270;;; telnet.el ends here 271