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1 | ;;; kermit.el --- additions to shell mode for use with kermit, etc. |
2 | ||
3a801d0c ER |
3 | ;; Copyright (C) 1988 Free Software Foundation, Inc. |
4 | ||
282d89c0 ER |
5 | ;; Author: Jeff Norden <jeff@colgate.csnet> |
6 | ;; Created: 15 Feb 1988 | |
0af017e9 | 7 | |
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
0af017e9 | 13 | ;; any later version. |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
22 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
282d89c0 | 24 | ;;; Commentary |
0af017e9 | 25 | |
26 | ;; I'm not sure, but I think somebody asked about running kermit under shell | |
27 | ;; mode a while ago. Anyway, here is some code that I find useful. The result | |
28 | ;; is that I can log onto machines with primitive operating systems (VMS and | |
29 | ;; ATT system V :-), and still have the features of shell-mode available for | |
30 | ;; command history, etc. It's also handy to be able to run a file transfer in | |
31 | ;; an emacs window. The transfer is in the "background", but you can also | |
32 | ;; monitor or stop it easily. | |
33 | ||
34 | ;; The ^\ key is bound to a function for sending escape sequences to kermit, | |
35 | ;; and ^C^Q can be used to send any control characters needed thru to the | |
36 | ;; system you connect to. A more serious problem is that some brain-dead | |
37 | ;; systems will not recognize a ^J as an end-of-line character. So LFD is | |
38 | ;; bound to a new function which acts just like CR usually does in shell-mode, | |
39 | ;; but a ^M is sent as an end-of-line. Funcions are also provied to swap the | |
40 | ;; bindings of CR and LFD. I've also included a filter which will clean out | |
41 | ;; any ^M's or ^@'s that get typed at you, but I don't really recommend it. | |
42 | ;; There doesn't seem to be an acceptably fast way to do this via emacs-lisp. | |
43 | ;; Invoking kermit by the command " kermit | tr -d '\015' " seems to work | |
44 | ;; better (on my system anyway). | |
45 | ||
46 | ;; Here's how I've been using this setup. We have several machines connected | |
47 | ;; thru a fairly stupid terminal switch. If I want to connect to unix system, | |
48 | ;; then I use the LFD key to talk to the switch, and ignore any ^M's in the | |
49 | ;; buffer, and do a " stty -echo nl " after I log in. Then the only real | |
50 | ;; differnce from being in local shell-mode is that it is you need to to type | |
51 | ;; ^C^Q^C to send an interrupt, and ^C^Q^Z for a stop signal, etc. (since ^C^C | |
52 | ;; just generates a local stop signal, which kermit ignores). | |
53 | ;; To connect to a VMS system, I use a shell script to invoke kermit thru the | |
54 | ;; tr filter, do "M-X kermit-send-cr", and then tell VMS that I'm on a half-duplex | |
55 | ;; terminal. | |
56 | ||
57 | ;; Some caveats: | |
58 | ;; 1) Kermit under shell mode is a real pain if you don't have pty's. I | |
59 | ;; recently discovered this on our 3b2/400. When kermit can't find a tty, it | |
60 | ;; assumes it is supposed to be in remote mode. So the simple command "kermit" | |
61 | ;; won't work in shell mode on such a system. You can get around this by using | |
62 | ;; the -c (connect) command line option, which means you also have to specify a | |
63 | ;; line and baud on the command line, as in "kermit -l /dev/tty53 -b 9600 -c". | |
64 | ;; However, this will cause kermit to exit when the connection is closed. So | |
65 | ;; in order to do a file transfer, you have to think ahead and and add -r | |
66 | ;; (receive) to the command line. This means that you can't use the server | |
67 | ;; feature. The only fix I can see is to muck around with the source code for | |
68 | ;; kermit, although this problably wouldn't be too hard. What is needed is an | |
69 | ;; option to force kermit to be local, to use stdin and stdout for interactive | |
70 | ;; speech, and to forget about cbreak mode. | |
71 | ||
72 | ;; Please let me know if any bugs turn up. | |
73 | ;; Feb 1988, Jeff Norden - jeff@colgate.csnet | |
74 | ||
e5167999 ER |
75 | ;;; Code: |
76 | ||
282d89c0 ER |
77 | (require 'shell) |
78 | ||
0af017e9 | 79 | (defvar kermit-esc-char "\C-\\" "*Kermit's escape char") |
80 | ||
81 | (defun kermit-esc () | |
82 | "For sending escape sequences to a kermit running in shell mode." | |
83 | (interactive) | |
84 | (process-send-string | |
85 | (get-buffer-process (current-buffer)) | |
86 | (concat kermit-esc-char (char-to-string (read-char))))) | |
87 | ||
88 | (defun kermit-send-char () | |
89 | "Send an arbitrary character to a program in shell mode." | |
90 | (interactive) | |
91 | (process-send-string | |
92 | (get-buffer-process (current-buffer)) | |
93 | (char-to-string (read-char)))) | |
94 | ||
95 | (define-key shell-mode-map "\C-\\" 'kermit-esc) | |
96 | (define-key shell-mode-map "\C-c\C-q" 'kermit-send-char) | |
97 | ;; extra bindings for folks suffering form ^S/^Q braindamage: | |
98 | (define-key shell-mode-map "\C-c\\" 'kermit-esc) | |
99 | ||
100 | (defun kermit-send-input-cr () | |
101 | "Like \\[comint-send-input] but end the line with carriage-return." | |
102 | (interactive) | |
e8a57935 JB |
103 | (comint-send-input) |
104 | (comint-send-string (get-buffer-process (current-buffer)) "\r")) | |
0af017e9 | 105 | |
106 | ;; This is backwards of what makes sense, but ... | |
107 | (define-key shell-mode-map "\n" 'kermit-send-input-cr) | |
108 | ||
109 | (defun kermit-default-cr () | |
110 | "Make RETURN end the line with carriage-return and LFD end it with a newline. | |
111 | This is useful for talking to other systems on which carriage-return | |
112 | is the normal way to end a line." | |
113 | (interactive) | |
114 | (define-key shell-mode-map "\r" 'kermit-send-input-cr) | |
115 | (define-key shell-mode-map "\n" 'comint-send-input)) | |
116 | ||
117 | (defun kermit-default-nl () | |
118 | "Make RETURN end the line with a newline char. This is the default state. | |
119 | In this state, use LFD to send a line and end it with a carriage-return." | |
120 | (interactive) | |
121 | (define-key shell-mode-map "\n" 'kermit-send-input-cr) | |
122 | (define-key shell-mode-map "\r" 'comint-send-input)) | |
123 | ||
124 | (defun kermit-clean-filter (proc str) | |
125 | "Strip ^M and ^@ characters from process output." | |
126 | (save-excursion | |
127 | (let ((beg (process-mark proc))) | |
128 | (set-buffer (process-buffer proc)) | |
129 | (goto-char beg) | |
130 | (insert-before-markers str) | |
e8a57935 | 131 | (while (re-search-backward "[\r\C-a]+" beg t) |
0af017e9 | 132 | (replace-match ""))))) |
133 | ||
134 | (defun kermit-clean-on () | |
e8a57935 | 135 | "Delete all null characters and ^M's from the kermit output. |
0af017e9 | 136 | Note that another (perhaps better) way to do this is to use the |
94074b19 | 137 | command `kermit | tr -d '\\015''." |
0af017e9 | 138 | (interactive) |
139 | (set-process-filter (get-buffer-process (current-buffer)) | |
140 | 'kermit-clean-filter)) | |
141 | ||
142 | (defun kermit-clean-off () | |
143 | "Cancel a previous kermit-clean-shell-on command." | |
144 | (interactive) | |
145 | (set-process-filter (get-buffer-process (current-buffer)) nil)) | |
146 | ||
282d89c0 | 147 | ;;; kermit.el ends here |