;;; kermit.el --- additions to shell mode for use with kermit ;; Copyright (C) 1988, 2001, 2002, 2003, 2004, 2005, ;; 2006, 2007 Free Software Foundation, Inc. ;; Author: Jeff Norden <jeff@colgate.csnet> ;; Maintainer: FSF ;; Created: 15 Feb 1988 ;; Keywords: comm ;; This file is part of GNU Emacs. ;; GNU Emacs 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. ;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, ;; Boston, MA 02110-1301, USA. ;;; Commentary: ;; I'm not sure, but I think somebody asked about running kermit under shell ;; mode a while ago. Anyway, here is some code that I find useful. The result ;; is that I can log onto machines with primitive operating systems (VMS and ;; ATT system V :-), and still have the features of shell-mode available for ;; command history, etc. It's also handy to be able to run a file transfer in ;; an emacs window. The transfer is in the "background", but you can also ;; monitor or stop it easily. ;; The ^\ key is bound to a function for sending escape sequences to kermit, ;; and ^C^Q can be used to send any control characters needed thru to the ;; system you connect to. A more serious problem is that some brain-dead ;; systems will not recognize a ^J as an end-of-line character. So LFD is ;; bound to a new function which acts just like CR usually does in shell-mode, ;; but a ^M is sent as an end-of-line. Functions are also provided to swap the ;; bindings of CR and LFD. I've also included a filter which will clean out ;; any ^M's or ^@'s that get typed at you, but I don't really recommend it. ;; There doesn't seem to be an acceptably fast way to do this via emacs-lisp. ;; Invoking kermit by the command " kermit | tr -d '\015' " seems to work ;; better (on my system anyway). ;; Here's how I've been using this setup. We have several machines connected ;; thru a fairly stupid terminal switch. If I want to connect to unix system, ;; then I use the LFD key to talk to the switch, and ignore any ^M's in the ;; buffer, and do a " stty -echo nl " after I log in. Then the only real ;; difference from being in local shell-mode is that you need to type ;; ^C^Q^C to send an interrupt, and ^C^Q^Z for a stop signal, etc. (since ^C^C ;; just generates a local stop signal, which kermit ignores). ;; To connect to a VMS system, I use a shell script to invoke kermit thru the ;; tr filter, do "M-X kermit-send-cr", and then tell VMS that I'm on a ;; half-duplex terminal. ;; Some caveats: ;; 1) Kermit under shell mode is a real pain if you don't have pty's. I ;; recently discovered this on our 3b2/400. When kermit can't find a tty, it ;; assumes it is supposed to be in remote mode. So the simple command "kermit" ;; won't work in shell mode on such a system. You can get around this by using ;; the -c (connect) command line option, which means you also have to specify a ;; line and baud on the command line, as in "kermit -l /dev/tty53 -b 9600 -c". ;; However, this will cause kermit to exit when the connection is closed. So ;; in order to do a file transfer, you have to think ahead and and add -r ;; (receive) to the command line. This means that you can't use the server ;; feature. The only fix I can see is to muck around with the source code for ;; kermit, although this probably wouldn't be too hard. What is needed is an ;; option to force kermit to be local, to use stdin and stdout for interactive ;; speech, and to forget about cbreak mode. ;; Please let me know if any bugs turn up. ;; Feb 1988, Jeff Norden - jeff@colgate.csnet ;;; Code: (require 'shell) (defvar kermit-esc-char "\C-\\" "*Kermit's escape char") (defun kermit-esc () "For sending escape sequences to a kermit running in shell mode." (interactive) (process-send-string (get-buffer-process (current-buffer)) (concat kermit-esc-char (char-to-string (read-char))))) (defun kermit-send-char () "Send an arbitrary character to a program in shell mode." (interactive) (process-send-string (get-buffer-process (current-buffer)) (char-to-string (read-char)))) (define-key shell-mode-map "\C-\\" 'kermit-esc) (define-key shell-mode-map "\C-c\C-q" 'kermit-send-char) ;; extra bindings for folks suffering form ^S/^Q braindamage: (define-key shell-mode-map "\C-c\\" 'kermit-esc) (defun kermit-send-input-cr () "Like \\[comint-send-input] but end the line with carriage-return." (interactive) (comint-send-input) (comint-send-string (get-buffer-process (current-buffer)) "\r")) ;; This is backwards of what makes sense, but ... (define-key shell-mode-map "\n" 'kermit-send-input-cr) (defun kermit-default-cr () "Make RETURN end the line with carriage-return and LFD end it with a newline. This is useful for talking to other systems on which carriage-return is the normal way to end a line." (interactive) (define-key shell-mode-map "\r" 'kermit-send-input-cr) (define-key shell-mode-map "\n" 'comint-send-input)) (defun kermit-default-nl () "Make RETURN end the line with a newline char. This is the default state. In this state, use LFD to send a line and end it with a carriage-return." (interactive) (define-key shell-mode-map "\n" 'kermit-send-input-cr) (define-key shell-mode-map "\r" 'comint-send-input)) (defun kermit-clean-filter (proc str) "Strip ^M and ^@ characters from process output." (save-excursion (let ((beg (process-mark proc))) (set-buffer (process-buffer proc)) (goto-char beg) (insert-before-markers str) (while (re-search-backward "[\r\C-a]+" beg t) (replace-match ""))))) (defun kermit-clean-on () "Delete all null characters and ^M's from the kermit output. Note that another (perhaps better) way to do this is to use the command `kermit | tr -d '\\015''." (interactive) (set-process-filter (get-buffer-process (current-buffer)) 'kermit-clean-filter)) (defun kermit-clean-off () "Cancel a previous kermit-clean-shell-on command." (interactive) (set-process-filter (get-buffer-process (current-buffer)) nil)) (provide 'kermit) ;;; arch-tag: 6633215d-6c47-4e66-9f27-16fba02a8dce ;;; kermit.el ends here