home *** CD-ROM | disk | FTP | other *** search
- ;;Additions to shell mode for use with kermit, etc.
- ;;Feb 1988, Jeff Norden - jeff@colgate.csnet
- ;; Copyright (C) 1988 Free Software Foundation, Inc.
-
- ;; 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- (require 'shell)
-
- ;; 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. Funcions are also provied 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
- ;; differnce from being in local shell-mode is that it is you need to 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 problably 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.
-
- ;; 2) The "clean-filter" can be a troublesome item. The main problem arises if
- ;; you are running a program under shell-mode which is doing periodic output,
- ;; and you then try to switch to another buffer. I came across this while
- ;; running kermit file transfers - kermit prints a dot each time a packet is
- ;; received. Since emacs is interrupted each time a dot is printed, it becomes
- ;; impossible to edit the other buffer. If you hit a key while the filter code
- ;; is running, that character will wind up in the *shell* buffer instead of the
- ;; current one! So you need to be careful to turn the filter off before
- ;; leaving the buffer if a program is still running. In fact, you can't even
- ;; use "M-x clean-shell-off" to do this, because you won't be able to type
- ;; "clean-shell-off" in the minibuffer!! So you need to have this command
- ;; bound to a keystroke.
-
- ;; Please let me know if any bugs turn up.
- ;; Feb 1988, Jeff Norden - jeff@colgate.csnet
-
- (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 shell-send-input-cr ()
- "Like \\[shell-send-input] but end the line with carriage-return."
- (interactive)
- (end-of-line)
- (if (eobp)
- (progn
- (move-marker last-input-start
- (process-mark (get-buffer-process (current-buffer))))
- (insert ?\n)
- (move-marker last-input-end (point)))
- (beginning-of-line)
- (re-search-forward shell-prompt-pattern nil t)
- (let ((copy (buffer-substring (point)
- (progn (forward-line 1) (point)))))
- (goto-char (point-max))
- (move-marker last-input-start (point))
- (insert copy)
- (move-marker last-input-end (point))))
- (condition-case ()
- (save-excursion
- (goto-char last-input-start)
- (shell-set-directory))
- (error (funcall shell-set-directory-error-hook)))
- (let ((process (get-buffer-process (current-buffer))))
- (process-send-region process last-input-start (- last-input-end 1))
- (process-send-string process "\r")
- (set-marker (process-mark process) (point))))
-
- ;; This is backwards of what makes sense, but ...
- (define-key shell-mode-map "\n" 'shell-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" 'shell-send-input-cr)
- (define-key shell-mode-map "\n" 'shell-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" 'shell-send-input-cr)
- (define-key shell-mode-map "\r" 'shell-send-input))
-
- ;; This filter works, but I don't especially recommend it.
- (defun kermit-clean-filter (process string)
- "A process filter which deletes all ^M's and ^@'s from the output."
- (set-buffer (process-buffer process))
- (let
- ((firstpos (string-match "[^\C-@\r]+" string))
- (buffermark (process-mark process))
- (oldpt (point))
- (newstring '"")
- goback)
- (while firstpos
- (setq newstring
- (concat newstring (substring string firstpos (match-end 0))))
- (setq firstpos (string-match "[^\C-@\r]+" string (match-end 0))))
- (goto-char (marker-position buffermark))
- (setq goback (< oldpt (point)))
- (insert newstring)
- (set-marker buffermark (point))
- (if goback (goto-char oldpt))))
-
- (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))
-
-
-