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;;; rlogin.el --- remote login interface
;; Author: Noah Friedman
;; Maintainer: Noah Friedman <friedman@prep.ai.mit.edu>
;; Keywords: unix, comm
;; Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; if not, write to: The Free Software Foundation,
;; Inc.; 675 Massachusetts Avenue.; Cambridge, MA 02139, USA.
;;; Commentary:
;; Support for remote logins using `rlogin'.
;; $Id: rlogin.el,v 1.17 1994/02/05 21:13:43 roland Exp friedman $
;; If you wish for rlogin mode to prompt you in the minibuffer for
;; passwords when a password prompt appears, just enter m-x send-invisible
;; and type in your line, or add `comint-watch-for-password-prompt' to
;; `comint-output-filter-functions'.
;;; Code:
(require 'comint)
(require 'shell)
;;;###autoload
(defvar rlogin-program "rlogin"
"*Name of program to invoke rlogin")
;;;###autoload
(defvar rlogin-explicit-args nil
"*List of arguments to pass to rlogin on the command line.")
;;;###autoload
(defvar rlogin-mode-hook nil
"*Hooks to run after setting current buffer to rlogin-mode.")
;;;###autoload
(defvar rlogin-process-connection-type nil
"*If non-`nil', use a pty for the local rlogin process.
If `nil', use a pipe (if pipes are supported on the local system).
Generally it is better not to waste ptys on systems which have a static
number of them. On the other hand, some implementations of `rlogin' assume
a pty is being used, and errors will result from using a pipe instead.")
;;;###autoload
(defvar rlogin-initially-track-cwd t
"*If non-`nil', do remote directory tracking via ange-ftp right away.
If `nil', you can still enable directory tracking by doing
`M-x dirtrack-toggle'.")
;; Initialize rlogin mode map.
(defvar rlogin-mode-map '())
(cond ((not rlogin-mode-map)
(setq rlogin-mode-map (cons 'keymap shell-mode-map))
(define-key rlogin-mode-map "\C-c\C-c" 'rlogin-send-Ctrl-C)
(define-key rlogin-mode-map "\C-c\C-d" 'rlogin-send-Ctrl-D)
(define-key rlogin-mode-map "\C-c\C-z" 'rlogin-send-Ctrl-Z)
(define-key rlogin-mode-map "\C-c\C-\\" 'rlogin-send-Ctrl-backslash)
(define-key rlogin-mode-map "\C-d" 'rlogin-delchar-or-send-Ctrl-D)))
;;;###autoload
(defun rlogin (input-args &optional prefix)
"Open a network login connection to HOST via the `rlogin' program.
Input is sent line-at-a-time to the remote connection.
Communication with the remote host is recorded in a buffer *rlogin-HOST*,
where HOST is the first word in the string ARGS. If a prefix argument is
given and the buffer *rlogin-HOST* already exists, a new buffer with a
different connection will be made.
The variable `rlogin-program' contains the name of the actual program to
run. It can be a relative or absolute path.
The variable `rlogin-explicit-args' is a list of arguments to give to
the rlogin when starting. They are added after any arguments given in ARGS."
(interactive (list (read-from-minibuffer "rlogin arguments (hostname first): ")
current-prefix-arg))
(let* ((process-connection-type rlogin-process-connection-type)
(buffer-name (format "*rlogin-%s*" input-args))
args
proc
(old-match-data (match-data)))
(while (string-match "[ \t]*\\([^ \t]+\\)$" input-args)
(setq args
(cons (substring input-args (match-beginning 1) (match-end 1))
args)
input-args (substring input-args 0 (match-beginning 0))))
(store-match-data old-match-data)
(setq buffer-name (format "*rlogin-%s*" (car args))
args (append args rlogin-explicit-args))
(and prefix (setq buffer-name
(buffer-name (generate-new-buffer buffer-name))))
(switch-to-buffer buffer-name)
(or (comint-check-proc buffer-name)
(progn
(comint-mode)
(comint-exec (current-buffer) buffer-name rlogin-program nil args)
(setq proc (get-process buffer-name))
;; Set process-mark to point-max in case there is text in the
;; buffer from a previous exited process.
(set-marker (process-mark proc) (point-max))
(rlogin-mode)
;; Set the prefix for filename completion and directory tracking
;; to find the remote machine's files by ftp.
(setq comint-file-name-prefix (concat "/" (car args) ":"))
(and rlogin-initially-track-cwd
;; Presume the user will start in his remote home directory.
;; If this is wrong, M-x dirs will fix it.
(cd-absolute (concat "/" (car args) ":~/")))))))
(defun rlogin-mode ()
"Set major-mode for rlogin sessions.
If `rlogin-mode-hook' is set, run it."
(interactive)
(kill-all-local-variables)
(shell-mode)
(setq major-mode 'rlogin-mode)
(setq mode-name "rlogin")
(use-local-map rlogin-mode-map)
(setq shell-dirtrackp rlogin-initially-track-cwd)
(make-local-variable 'comint-file-name-prefix)
(run-hooks 'rlogin-mode-hook))
(defun rlogin-send-Ctrl-C ()
(interactive)
(send-string nil "\C-c"))
(defun rlogin-send-Ctrl-D ()
(interactive)
(send-string nil "\C-d"))
(defun rlogin-send-Ctrl-Z ()
(interactive)
(send-string nil "\C-z"))
(defun rlogin-send-Ctrl-backslash ()
(interactive)
(send-string nil "\C-\\"))
(defun rlogin-delchar-or-send-Ctrl-D (arg)
"\
Delete ARG characters forward, or send a C-d to process if at end of buffer."
(interactive "p")
(if (eobp)
(rlogin-send-Ctrl-D)
(delete-char arg)))
;;; rlogin.el ends here
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