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1.1 root 1: ;;Additions to shell mode for use with kermit, etc.
2: ;;Feb 1988, Jeff Norden - [email protected]
3: ;; Copyright (C) 1988 Free Software Foundation, Inc.
4:
5: ;; This file is part of GNU Emacs.
6:
7: ;; GNU Emacs is free software; you can redistribute it and/or modify
8: ;; it under the terms of the GNU General Public License as published by
9: ;; the Free Software Foundation; either version 1, or (at your option)
10: ;; any later version.
11:
12: ;; GNU Emacs is distributed in the hope that it will be useful,
13: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: ;; GNU General Public License for more details.
16:
17: ;; You should have received a copy of the GNU General Public License
18: ;; along with GNU Emacs; see the file COPYING. If not, write to
19: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21: (require 'shell)
22:
23: ;; I'm not sure, but I think somebody asked about running kermit under shell
24: ;; mode a while ago. Anyway, here is some code that I find useful. The result
25: ;; is that I can log onto machines with primitive operating systems (VMS and
26: ;; ATT system V :-), and still have the features of shell-mode available for
27: ;; command history, etc. It's also handy to be able to run a file transfer in
28: ;; an emacs window. The transfer is in the "background", but you can also
29: ;; monitor or stop it easily.
30:
31: ;; The ^\ key is bound to a function for sending escape sequences to kermit,
32: ;; and ^C^Q can be used to send any control characters needed thru to the
33: ;; system you connect to. A more serious problem is that some brain-dead
34: ;; systems will not recognize a ^J as an end-of-line character. So LFD is
35: ;; bound to a new function which acts just like CR usually does in shell-mode,
36: ;; but a ^M is sent as an end-of-line. Funcions are also provied to swap the
37: ;; bindings of CR and LFD. I've also included a filter which will clean out
38: ;; any ^M's or ^@'s that get typed at you, but I don't really recommend it.
39: ;; There doesn't seem to be an acceptably fast way to do this via emacs-lisp.
40: ;; Invoking kermit by the command " kermit | tr -d '\015' " seems to work
41: ;; better (on my system anyway).
42:
43: ;; Here's how I've been using this setup. We have several machines connected
44: ;; thru a fairly stupid terminal switch. If I want to connect to unix system,
45: ;; then I use the LFD key to talk to the switch, and ignore any ^M's in the
46: ;; buffer, and do a " stty -echo nl " after I log in. Then the only real
47: ;; differnce from being in local shell-mode is that it is you need to to type
48: ;; ^C^Q^C to send an interrupt, and ^C^Q^Z for a stop signal, etc. (since ^C^C
49: ;; just generates a local stop signal, which kermit ignores).
50: ;; To connect to a VMS system, I use a shell script to invoke kermit thru the
51: ;; tr filter, do "M-X kermit-send-cr", and then tell VMS that I'm on a half-duplex
52: ;; terminal.
53:
54: ;; Some caveats:
55: ;; 1) Kermit under shell mode is a real pain if you don't have pty's. I
56: ;; recently discovered this on our 3b2/400. When kermit can't find a tty, it
57: ;; assumes it is supposed to be in remote mode. So the simple command "kermit"
58: ;; won't work in shell mode on such a system. You can get around this by using
59: ;; the -c (connect) command line option, which means you also have to specify a
60: ;; line and baud on the command line, as in "kermit -l /dev/tty53 -b 9600 -c".
61: ;; However, this will cause kermit to exit when the connection is closed. So
62: ;; in order to do a file transfer, you have to think ahead and and add -r
63: ;; (receive) to the command line. This means that you can't use the server
64: ;; feature. The only fix I can see is to muck around with the source code for
65: ;; kermit, although this problably wouldn't be too hard. What is needed is an
66: ;; option to force kermit to be local, to use stdin and stdout for interactive
67: ;; speech, and to forget about cbreak mode.
68:
69: ;; 2) The "clean-filter" can be a troublesome item. The main problem arises if
70: ;; you are running a program under shell-mode which is doing periodic output,
71: ;; and you then try to switch to another buffer. I came across this while
72: ;; running kermit file transfers - kermit prints a dot each time a packet is
73: ;; received. Since emacs is interrupted each time a dot is printed, it becomes
74: ;; impossible to edit the other buffer. If you hit a key while the filter code
75: ;; is running, that character will wind up in the *shell* buffer instead of the
76: ;; current one! So you need to be careful to turn the filter off before
77: ;; leaving the buffer if a program is still running. In fact, you can't even
78: ;; use "M-x clean-shell-off" to do this, because you won't be able to type
79: ;; "clean-shell-off" in the minibuffer!! So you need to have this command
80: ;; bound to a keystroke.
81:
82: ;; Please let me know if any bugs turn up.
83: ;; Feb 1988, Jeff Norden - [email protected]
84:
85: (defvar kermit-esc-char "\C-\\" "*Kermit's escape char")
86:
87: (defun kermit-esc ()
88: "For sending escape sequences to a kermit running in shell mode."
89: (interactive)
90: (process-send-string
91: (get-buffer-process (current-buffer))
92: (concat kermit-esc-char (char-to-string (read-char)))))
93:
94: (defun kermit-send-char ()
95: "Send an arbitrary character to a program in shell mode."
96: (interactive)
97: (process-send-string
98: (get-buffer-process (current-buffer))
99: (char-to-string (read-char))))
100:
101: (define-key shell-mode-map "\C-\\" 'kermit-esc)
102: (define-key shell-mode-map "\C-c\C-q" 'kermit-send-char)
103: ;; extra bindings for folks suffering form ^S/^Q braindamage:
104: (define-key shell-mode-map "\C-c\\" 'kermit-esc)
105:
106: (defun shell-send-input-cr ()
107: "Like \\[shell-send-input] but end the line with carriage-return."
108: (interactive)
109: (end-of-line)
110: (if (eobp)
111: (progn
112: (move-marker last-input-start
113: (process-mark (get-buffer-process (current-buffer))))
114: (insert ?\n)
115: (move-marker last-input-end (point)))
116: (beginning-of-line)
117: (re-search-forward shell-prompt-pattern nil t)
118: (let ((copy (buffer-substring (point)
119: (progn (forward-line 1) (point)))))
120: (goto-char (point-max))
121: (move-marker last-input-start (point))
122: (insert copy)
123: (move-marker last-input-end (point))))
124: (condition-case ()
125: (save-excursion
126: (goto-char last-input-start)
127: (shell-set-directory))
128: (error (funcall shell-set-directory-error-hook)))
129: (let ((process (get-buffer-process (current-buffer))))
130: (process-send-region process last-input-start (- last-input-end 1))
131: (process-send-string process "\r")
132: (set-marker (process-mark process) (point))))
133:
134: ;; This is backwards of what makes sense, but ...
135: (define-key shell-mode-map "\n" 'shell-send-input-cr)
136:
137: (defun kermit-default-cr ()
138: "Make RETURN end the line with carriage-return and LFD end it with a newline.
139: This is useful for talking to other systems on which carriage-return
140: is the normal way to end a line."
141: (interactive)
142: (define-key shell-mode-map "\r" 'shell-send-input-cr)
143: (define-key shell-mode-map "\n" 'shell-send-input))
144:
145: (defun kermit-default-nl ()
146: "Make RETURN end the line with a newline char. This is the default state.
147: In this state, use LFD to send a line and end it with a carriage-return."
148: (interactive)
149: (define-key shell-mode-map "\n" 'shell-send-input-cr)
150: (define-key shell-mode-map "\r" 'shell-send-input))
151:
152: ;; This filter works, but I don't especially recommend it.
153: (defun kermit-clean-filter (process string)
154: "A process filter which deletes all ^M's and ^@'s from the output."
155: (set-buffer (process-buffer process))
156: (let
157: ((firstpos (string-match "[^\C-@\r]+" string))
158: (buffermark (process-mark process))
159: (oldpt (point))
160: (newstring '"")
161: goback)
162: (while firstpos
163: (setq newstring
164: (concat newstring (substring string firstpos (match-end 0))))
165: (setq firstpos (string-match "[^\C-@\r]+" string (match-end 0))))
166: (goto-char (marker-position buffermark))
167: (setq goback (< oldpt (point)))
168: (insert newstring)
169: (set-marker buffermark (point))
170: (if goback (goto-char oldpt))))
171:
172: (defun kermit-clean-on ()
173: "Delete all null characters and ^M's from the kermit output.
174: Note that another (perhaps better) way to do this is to use the
175: command `kermit | tr -d '\\015''."
176: (interactive)
177: (set-process-filter (get-buffer-process (current-buffer))
178: 'kermit-clean-filter))
179:
180: (defun kermit-clean-off ()
181: "Cancel a previous kermit-clean-shell-on command"
182: (interactive)
183: (set-process-filter (get-buffer-process (current-buffer)) nil))
184:
185:
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