1;;; rlogin.el --- remote login interface 2 3;; Copyright (C) 1992, 1993, 1994, 1995, 1997, 1998, 2001, 2002, 2003, 4;; 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 5 6;; Author: Noah Friedman 7;; Maintainer: Noah Friedman <friedman@splode.com> 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;; Support for remote logins using `rlogin'. 30;; This program is layered on top of shell.el; the code here only accounts 31;; for the variations needed to handle a remote process, e.g. directory 32;; tracking and the sending of some special characters. 33 34;; If you wish for rlogin mode to prompt you in the minibuffer for 35;; passwords when a password prompt appears, just enter m-x send-invisible 36;; and type in your line, or add `comint-watch-for-password-prompt' to 37;; `comint-output-filter-functions'. 38 39;;; Code: 40 41(require 'comint) 42(require 'shell) 43 44(defgroup rlogin nil 45 "Remote login interface." 46 :group 'processes 47 :group 'unix) 48 49(defcustom rlogin-program "rlogin" 50 "*Name of program to invoke rlogin" 51 :type 'string 52 :group 'rlogin) 53 54(defcustom rlogin-explicit-args nil 55 "*List of arguments to pass to rlogin on the command line." 56 :type '(repeat (string :tag "Argument")) 57 :group 'rlogin) 58 59(defcustom rlogin-mode-hook nil 60 "*Hooks to run after setting current buffer to rlogin-mode." 61 :type 'hook 62 :group 'rlogin) 63 64(defcustom rlogin-process-connection-type 65 (save-match-data 66 ;; Solaris 2.x `rlogin' will spew a bunch of ioctl error messages if 67 ;; stdin isn't a tty. 68 (cond ((and (boundp 'system-configuration) 69 (stringp system-configuration) 70 (string-match "-solaris2" system-configuration)) 71 t) 72 (t nil))) 73 "*If non-nil, use a pty for the local rlogin process. 74If nil, use a pipe (if pipes are supported on the local system). 75 76Generally it is better not to waste ptys on systems which have a static 77number of them. On the other hand, some implementations of `rlogin' assume 78a pty is being used, and errors will result from using a pipe instead." 79 :type '(choice (const :tag "pipes" nil) 80 (other :tag "ptys" t)) 81 :group 'rlogin) 82 83(defcustom rlogin-directory-tracking-mode 'local 84 "*Control whether and how to do directory tracking in an rlogin buffer. 85 86nil means don't do directory tracking. 87 88t means do so using an ftp remote file name. 89 90Any other value means do directory tracking using local file names. 91This works only if the remote machine and the local one 92share the same directories (through NFS). This is the default. 93 94This variable becomes local to a buffer when set in any fashion for it. 95 96It is better to use the function of the same name to change the behavior of 97directory tracking in an rlogin session once it has begun, rather than 98simply setting this variable, since the function does the necessary 99re-synching of directories." 100 :type '(choice (const :tag "off" nil) 101 (const :tag "ftp" t) 102 (other :tag "local" local)) 103 :group 'rlogin) 104 105(make-variable-buffer-local 'rlogin-directory-tracking-mode) 106 107(defcustom rlogin-host nil 108 "*The name of the remote host. This variable is buffer-local." 109 :type '(choice (const nil) string) 110 :group 'rlogin) 111 112(defcustom rlogin-remote-user nil 113 "*The username used on the remote host. 114This variable is buffer-local and defaults to your local user name. 115If rlogin is invoked with the `-l' option to specify the remote username, 116this variable is set from that." 117 :type '(choice (const nil) string) 118 :group 'rlogin) 119 120;; Initialize rlogin mode map. 121(defvar rlogin-mode-map '()) 122(cond 123 ((null rlogin-mode-map) 124 (setq rlogin-mode-map (if (consp shell-mode-map) 125 (cons 'keymap shell-mode-map) 126 (copy-keymap shell-mode-map))) 127 (define-key rlogin-mode-map "\C-c\C-c" 'rlogin-send-Ctrl-C) 128 (define-key rlogin-mode-map "\C-c\C-d" 'rlogin-send-Ctrl-D) 129 (define-key rlogin-mode-map "\C-c\C-z" 'rlogin-send-Ctrl-Z) 130 (define-key rlogin-mode-map "\C-c\C-\\" 'rlogin-send-Ctrl-backslash) 131 (define-key rlogin-mode-map "\C-d" 'rlogin-delchar-or-send-Ctrl-D) 132 (define-key rlogin-mode-map "\C-i" 'rlogin-tab-or-complete))) 133 134 135;;;###autoload (add-hook 'same-window-regexps "^\\*rlogin-.*\\*\\(\\|<[0-9]+>\\)") 136 137(defvar rlogin-history nil) 138 139;;;###autoload 140(defun rlogin (input-args &optional buffer) 141 "Open a network login connection via `rlogin' with args INPUT-ARGS. 142INPUT-ARGS should start with a host name; it may also contain 143other arguments for `rlogin'. 144 145Input is sent line-at-a-time to the remote connection. 146 147Communication with the remote host is recorded in a buffer `*rlogin-HOST*' 148\(or `*rlogin-USER@HOST*' if the remote username differs\). 149If a prefix argument is given and the buffer `*rlogin-HOST*' already exists, 150a new buffer with a different connection will be made. 151 152When called from a program, if the optional second argument BUFFER is 153a string or buffer, it specifies the buffer to use. 154 155The variable `rlogin-program' contains the name of the actual program to 156run. It can be a relative or absolute path. 157 158The variable `rlogin-explicit-args' is a list of arguments to give to 159the rlogin when starting. They are added after any arguments given in 160INPUT-ARGS. 161 162If the default value of `rlogin-directory-tracking-mode' is t, then the 163default directory in that buffer is set to a remote (FTP) file name to 164access your home directory on the remote machine. Occasionally this causes 165an error, if you cannot access the home directory on that machine. This 166error is harmless as long as you don't try to use that default directory. 167 168If `rlogin-directory-tracking-mode' is neither t nor nil, then the default 169directory is initially set up to your (local) home directory. 170This is useful if the remote machine and your local machine 171share the same files via NFS. This is the default. 172 173If you wish to change directory tracking styles during a session, use the 174function `rlogin-directory-tracking-mode' rather than simply setting the 175variable." 176 (interactive (list 177 (read-from-minibuffer "rlogin arguments (hostname first): " 178 nil nil nil 'rlogin-history) 179 current-prefix-arg)) 180 181 (let* ((process-connection-type rlogin-process-connection-type) 182 (args (if rlogin-explicit-args 183 (append (split-string input-args) 184 rlogin-explicit-args) 185 (split-string input-args))) 186 (host (let ((tail args)) 187 ;; Find first arg that doesn't look like an option. 188 ;; This still loses for args that take values, feh. 189 (while (and tail (= ?- (aref (car tail) 0))) 190 (setq tail (cdr tail))) 191 (car tail))) 192 (user (or (car (cdr (member "-l" args))) 193 (user-login-name))) 194 (buffer-name (if (string= user (user-login-name)) 195 (format "*rlogin-%s*" host) 196 (format "*rlogin-%s@%s*" user host)))) 197 198 (cond ((null buffer)) 199 ((stringp buffer) 200 (setq buffer-name buffer)) 201 ((bufferp buffer) 202 (setq buffer-name (buffer-name buffer))) 203 ((numberp buffer) 204 (setq buffer-name (format "%s<%d>" buffer-name buffer))) 205 (t 206 (setq buffer-name (generate-new-buffer-name buffer-name)))) 207 208 (setq buffer (get-buffer-create buffer-name)) 209 (pop-to-buffer buffer-name) 210 211 (unless (comint-check-proc buffer-name) 212 (comint-exec buffer buffer-name rlogin-program nil args) 213 214 (rlogin-mode) 215 216 (make-local-variable 'rlogin-host) 217 (setq rlogin-host host) 218 (make-local-variable 'rlogin-remote-user) 219 (setq rlogin-remote-user user) 220 221 (condition-case () 222 (cond ((eq rlogin-directory-tracking-mode t) 223 ;; Do this here, rather than calling the tracking mode 224 ;; function, to avoid a gratuitous resync check; the default 225 ;; should be the user's home directory, be it local or remote. 226 (setq comint-file-name-prefix 227 (concat "/" rlogin-remote-user "@" rlogin-host ":")) 228 (cd-absolute comint-file-name-prefix)) 229 ((null rlogin-directory-tracking-mode)) 230 (t 231 (cd-absolute (concat comint-file-name-prefix "~/")))) 232 (error nil))))) 233 234(put 'rlogin-mode 'mode-class 'special) 235 236(define-derived-mode rlogin-mode shell-mode "Rlogin" 237 (setq shell-dirtrackp rlogin-directory-tracking-mode) 238 (make-local-variable 'comint-file-name-prefix)) 239 240(defun rlogin-directory-tracking-mode (&optional prefix) 241 "Do remote or local directory tracking, or disable entirely. 242 243If called with no prefix argument or a unspecified prefix argument (just 244``\\[universal-argument]'' with no number) do remote directory tracking via 245ange-ftp. If called as a function, give it no argument. 246 247If called with a negative prefix argument, disable directory tracking 248entirely. 249 250If called with a positive, numeric prefix argument, e.g. 251``\\[universal-argument] 1 M-x rlogin-directory-tracking-mode\'', 252then do directory tracking but assume the remote filesystem is the same as 253the local system. This only works in general if the remote machine and the 254local one share the same directories (through NFS)." 255 (interactive "P") 256 (cond 257 ((or (null prefix) 258 (consp prefix)) 259 (setq rlogin-directory-tracking-mode t) 260 (setq shell-dirtrackp t) 261 (setq comint-file-name-prefix 262 (concat "/" rlogin-remote-user "@" rlogin-host ":"))) 263 ((< prefix 0) 264 (setq rlogin-directory-tracking-mode nil) 265 (setq shell-dirtrackp nil)) 266 (t 267 (setq rlogin-directory-tracking-mode 'local) 268 (setq comint-file-name-prefix "") 269 (setq shell-dirtrackp t))) 270 (cond 271 (shell-dirtrackp 272 (let* ((proc (get-buffer-process (current-buffer))) 273 (proc-mark (process-mark proc)) 274 (current-input (buffer-substring proc-mark (point-max))) 275 (orig-point (point)) 276 (offset (and (>= orig-point proc-mark) 277 (- (point-max) orig-point)))) 278 (unwind-protect 279 (progn 280 (delete-region proc-mark (point-max)) 281 (goto-char (point-max)) 282 (shell-resync-dirs)) 283 (goto-char proc-mark) 284 (insert current-input) 285 (if offset 286 (goto-char (- (point-max) offset)) 287 (goto-char orig-point))))))) 288 289 290(defun rlogin-send-Ctrl-C () 291 (interactive) 292 (process-send-string nil "\C-c")) 293 294(defun rlogin-send-Ctrl-D () 295 (interactive) 296 (process-send-string nil "\C-d")) 297 298(defun rlogin-send-Ctrl-Z () 299 (interactive) 300 (process-send-string nil "\C-z")) 301 302(defun rlogin-send-Ctrl-backslash () 303 (interactive) 304 (process-send-string nil "\C-\\")) 305 306(defun rlogin-delchar-or-send-Ctrl-D (arg) 307 "\ 308Delete ARG characters forward, or send a C-d to process if at end of buffer." 309 (interactive "p") 310 (if (eobp) 311 (rlogin-send-Ctrl-D) 312 (delete-char arg))) 313 314(defun rlogin-tab-or-complete () 315 "Complete file name if doing directory tracking, or just insert TAB." 316 (interactive) 317 (if rlogin-directory-tracking-mode 318 (comint-dynamic-complete) 319 (insert "\C-i"))) 320 321(provide 'rlogin) 322 323;;; arch-tag: 6e20eabf-feda-40fa-ab40-0d156db447e4 324;;; rlogin.el ends here 325