home *** CD-ROM | disk | FTP | other *** search
- ;;; telnet.el --- run a telnet session from within an Emacs buffer
-
- ;;; Copyright (C) 1985, 1988, 1992, 1994 Free Software Foundation, Inc.
-
- ;; Author: William F. Schelter
- ;; Keywords: comm, unix
- ;; Maintainer: FSF
-
- ;; This file is part of XEmacs.
-
- ;; XEmacs 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.
-
- ;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free
- ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- ;; 02111-1307, USA.
-
- ;;; Synched up with: FSF 19.34.
-
- ;;; Commentary:
-
- ;; This mode is intended to be used for telnet or rsh to a remode host;
- ;; `telnet' and `rsh' are the two entry points. Multiple telnet or rsh
- ;; sessions are supported.
- ;;
- ;; Normally, input is sent to the remote telnet/rsh line-by-line, as you
- ;; type RET or LFD. C-c C-c sends a C-c to the remote immediately;
- ;; C-c C-z sends C-z immediately. C-c C-q followed by any character
- ;; sends that character immediately.
- ;;
- ;; All RET characters are filtered out of the output coming back from the
- ;; remote system. The mode tries to do other useful translations based
- ;; on what it sees coming back from the other system before the password
- ;; query. It knows about UNIX, ITS, TOPS-20 and Explorer systems.
-
- ;;; Code:
-
- ;; to do fix software types for lispm:
- ;; to eval current expression. Also to try to send escape keys correctly.
- ;; essentially we'll want the rubout-handler off.
-
- ;; filter is simplistic but should be okay for typical shell usage.
- ;; needs hacking if it is going to deal with asynchronous output in a sane
- ;; manner
-
- (require 'comint)
-
- (defgroup telnet nil
- "Run a telnet session from within an Emacs buffer."
- :group 'comint)
-
- (defvar telnet-new-line "\r")
- (defvar telnet-mode-map nil)
- (defvar telnet-default-prompt-pattern "^[^#$%>\n]*[#$%>] *")
- (defvar telnet-prompt-pattern telnet-default-prompt-pattern)
-
- (defvar telnet-replace-c-g nil)
- (make-variable-buffer-local
- (defvar telnet-remote-echoes t
- "True if the telnet process will echo input."))
- (make-variable-buffer-local
- (defvar telnet-interrupt-string "\C-c" "String sent by C-c."))
-
- (defvar telnet-count 0
- "Number of output strings read from the telnet process
- while looking for the initial password.")
- ;; (make-variable-buffer-local 'telnet-count)
-
- (defcustom telnet-program "telnet"
- "*Program to run to open a telnet connection."
- :type 'string
- :group 'telnet)
-
- (defcustom rsh-eat-password-string nil
- "Non-nil means rsh will look for a string matching a password prompt."
- :type 'boolean
- :group 'telnet)
-
- (defvar telnet-initial-count -75
- "Initial value of `telnet-count'. Should be set to the negative of the
- number of terminal writes telnet will make setting up the host connection.")
-
- (defvar telnet-maximum-count 4
- "Maximum value `telnet-count' can have.
- After this many passes, we stop looking for initial setup data.
- Should be set to the number of terminal writes telnet will make
- rejecting one login and prompting again for a username and password.")
-
- (defun telnet-interrupt-subjob ()
- (interactive)
- "Interrupt the program running through telnet on the remote host."
- (process-send-string nil telnet-interrupt-string))
-
- (defun telnet-c-z ()
- (interactive)
- (process-send-string nil "\C-z"))
-
- ;; XEmacs change (Keep telnet- prefix)
- (defun telnet-send-process-next-char ()
- (interactive)
- (process-send-string nil
- (char-to-string
- (let ((inhibit-quit t))
- (prog1 (read-char)
- (setq quit-flag nil))))))
-
- ; initialization on first load.
- (if telnet-mode-map
- nil
- ;; FSF
- ;; (setq telnet-mode-map (nconc (make-sparse-keymap) comint-mode-map))
- (setq telnet-mode-map (make-sparse-keymap))
- (set-keymap-parents telnet-mode-map (list comint-mode-map))
- (define-key telnet-mode-map "\C-m" 'telnet-send-input)
- ; (define-key telnet-mode-map "\C-j" 'telnet-send-input)
- (define-key telnet-mode-map "\C-c\C-q" 'telnet-send-process-next-char)
- (define-key telnet-mode-map "\C-c\C-c" 'telnet-interrupt-subjob)
- (define-key telnet-mode-map "\C-c\C-z" 'telnet-c-z))
-
- ;;maybe should have a flag for when have found type
- (defun telnet-check-software-type-initialize (string)
- "Tries to put correct initializations in. Needs work."
- (let ((case-fold-search t))
- (cond ((string-match "unix" string)
- (setq telnet-prompt-pattern shell-prompt-pattern)
- (setq telnet-new-line "\n"))
- ((string-match "tops-20" string) ;;maybe add telnet-replace-c-g
- (setq telnet-prompt-pattern "[@>] *"))
- ((string-match "its" string)
- (setq telnet-prompt-pattern "^[^*>\n]*[*>] *"))
- ((string-match "explorer" string) ;;explorer telnet needs work
- (setq telnet-replace-c-g ?\n))))
- (setq comint-prompt-regexp telnet-prompt-pattern))
-
- (defun telnet-initial-filter (proc string)
- (let ((case-fold-search t))
- ;For reading up to and including password; also will get machine type.
- (cond ((string-match "No such host" string)
- (kill-buffer (process-buffer proc))
- (error "No such host."))
- ((string-match "passw" string)
- (telnet-filter proc string)
- (let ((password (comint-read-noecho "Password: " t)))
- (setq telnet-count 0)
- (process-send-string proc (concat password telnet-new-line))))
- (t (telnet-check-software-type-initialize string)
- (telnet-filter proc string)
- (cond ((> telnet-count telnet-maximum-count)
- ;; (set-process-filter proc 'telnet-filter) Kludge
- ;; for shell-fonts -- this is the only mode that
- ;; actually changes what its process filter is at
- ;; run time, which confuses shell-font. So we
- ;; special-case that here.
- ;; #### Danger, knows an internal shell-font variable name.
- (let ((old-filter (process-filter proc)))
- (if (eq old-filter 'shell-font-process-filter)
- (set (make-local-variable 'shell-font-process-filter)
- 'telnet-filter)
- (set-process-filter proc 'telnet-filter))))
- (t (setq telnet-count (1+ telnet-count))))))))
-
- ;; Identical to comint-simple-send, except that it sends telnet-new-line
- ;; instead of "\n".
- (defun telnet-simple-send (proc string)
- (comint-send-string proc string)
- (comint-send-string proc telnet-new-line))
-
- (defun telnet-filter (proc string)
- (save-excursion
- (set-buffer (process-buffer proc))
- (save-match-data
- (let* ((last-insertion (marker-position (process-mark proc)))
- (delta (- (point) last-insertion))
- (ie (and comint-last-input-end
- (marker-position comint-last-input-end)))
- (w (get-buffer-window (current-buffer)))
- (ws (and w (window-start w))))
- (goto-char last-insertion)
- ;; Insert STRING, omitting all C-m characters.
- (insert-before-markers string)
- (set-marker (process-mark proc) (point))
- ;; the insert-before-markers may have screwed window-start
- ;; and likely moved comint-last-input-end. This is why the
- ;; insertion-reaction should be a property of markers, not
- ;; of the function which does the inserting.
- (if ws (set-window-start w ws t))
- (if ie (set-marker comint-last-input-end ie))
- (while (progn (skip-chars-backward "^\C-m" last-insertion)
- (> (point) last-insertion))
- (delete-region (1- (point)) (point)))
- (goto-char (process-mark proc))
- (and telnet-replace-c-g
- (subst-char-in-region last-insertion (point) ?\C-g
- telnet-replace-c-g t))
- ;; If point is after the insertion place, move it
- ;; along with the text.
- (if (> delta 0)
- (goto-char (+ (process-mark proc) delta)))))))
-
- (defun telnet-send-input ()
- (interactive)
- (let ((proc (get-buffer-process (current-buffer)))
- p1 p2)
- (if (and telnet-remote-echoes
- (>= (point) (process-mark proc)))
- (save-excursion
- (if comint-eol-on-send (end-of-line))
- (setq p1 (marker-position (process-mark proc))
- p2 (point))))
- (prog1
- (comint-send-input)
- ;; at this point, comint-send-input has moved the process mark, inserted
- ;; a newline, and possibly inserted the (echoed) output. If the host is
- ;; in remote-echo mode, then delete our local copy of the command, and
- ;; the newline that comint-send-input sent.
- (if p1
- (delete-region p1 (1+ p2))))))
-
- ;;;###autoload (add-hook 'same-window-regexps "\\*telnet-.*\\*\\(\\|<[0-9]+>\\)")
-
- ;;;###autoload
- (defun telnet (host &optional port)
- "Open a network login connection to host named HOST (a string).
- With a prefix argument, prompts for the port name or number as well.
- Communication with HOST is recorded in a buffer `*HOST-telnet*'.
- Normally input is edited in Emacs and sent a line at a time.
- See also `\\[rsh]'."
- (interactive (list (read-string "Open telnet connection to host: ")
- (if current-prefix-arg
- (read-string "Port name or number: ")
- nil)))
- (let* ((comint-delimiter-argument-list '(?\ ?\t))
- (name (concat "telnet-" (comint-arguments host 0 nil)
- (if port (concat "/" port) "")))
- (buffer (get-buffer (concat "*" name "*")))
- process)
- (if (and buffer (get-buffer-process buffer))
- (pop-to-buffer buffer)
- (pop-to-buffer (make-comint name telnet-program))
- (setq process (get-buffer-process (current-buffer)))
- (set-process-filter process 'telnet-initial-filter)
-
- ;; SunOS and IRIX don't print "unix" in their rsh or telnet
- ;; login banners, so let's get a reasonable default here.
- ;; #### This patch from jwz mimics what is done in rsh done
- ;; below. However, it (along with the one in rsh) mean that
- ;; telnet-check-software-type-initialize is effectively a
- ;; wastoid function. Reworking it like it claims to need is
- ;; probably the better solution but I'm not going to do it.
- ;; --cet
- (telnet-check-software-type-initialize "unix")
-
- ;; Don't send the `open' cmd till telnet is ready for it.
- (accept-process-output process)
- (erase-buffer)
- (process-send-string process (concat "open " host
- (if port (concat " " port) "")
- "\n"))
- (setq comint-input-sender 'telnet-simple-send)
- ;; run last so that hooks can change things.
- (telnet-mode))))
-
- (defun telnet-mode ()
- "This mode is for using telnet (or rsh) from a buffer to another host.
- It has most of the same commands as comint-mode.
- There is a variable ``telnet-interrupt-string'' which is the character
- sent to try to stop execution of a job on the remote host.
- Data is sent to the remote host when RET is typed.
-
- \\{telnet-mode-map}
- "
- (interactive)
- (comint-mode)
- (setq major-mode 'telnet-mode
- mode-name "Telnet"
- comint-prompt-regexp telnet-prompt-pattern)
- (use-local-map telnet-mode-map)
- (set (make-local-variable 'telnet-count) telnet-initial-count)
- (run-hooks 'telnet-mode-hook))
-
- ;;;###autoload (add-hook 'same-window-regexps "\\*rsh-[^-]*\\*\\(\\|<[0-9]*>\\)")
-
- ;; Berkeley spawn of hell
- ;;;###autoload
- (defun rsh (host)
- "Open a network login connection to host named HOST (a string).
- Communication with HOST is recorded in a buffer `*rsh-HOST*'.
- Normally input is edited in Emacs and sent a line at a time.
- See also `\\[telnet]'."
- (interactive "sOpen rsh connection to host: ")
- (require 'shell)
- (let ((name (concat "rsh-" host)))
- (pop-to-buffer (make-comint name remote-shell-program nil host))
- (set (make-local-variable 'telnet-count) telnet-initial-count)
- ;;
- ;; SunOS doesn't print "unix" in its rsh login banner, so let's get a
- ;; reasonable default here. There do exist non-Unix machines which
- ;; speak the rsh protocol, but let's hope they print their OS name
- ;; when one connects.
- ;;
- (telnet-check-software-type-initialize "unix")
- ;;
- ;; I think we should use telnet-filter here instead of -initial-filter,
- ;; because rsh generally doesn't prompt for a password, and gobbling the
- ;; first line that contains "passw" is extremely antisocial. More
- ;; antisocial than echoing a password, and more likely than connecting
- ;; to a non-Unix rsh host these days...
- ;;
- ;; I disagree with the above. -sb
- ;;
- (set-process-filter (get-process name) (if rsh-eat-password-string
- 'telnet-initial-filter
- 'telnet-filter))
- ;; (set-process-filter (get-process name) 'telnet-filter)
- ;; run last so that hooks can change things.
- (telnet-mode)))
-
- (provide 'telnet)
-
- ;;; telnet.el ends here
-