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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 distributed in the hope that it will be useful,
8: ;; but WITHOUT ANY WARRANTY. No author or distributor
9: ;; accepts responsibility to anyone for the consequences of using it
10: ;; or for whether it serves any particular purpose or works at all,
11: ;; unless he says so in writing. Refer to the GNU Emacs General Public
12: ;; License for full details.
13:
14: ;; Everyone is granted permission to copy, modify and redistribute
15: ;; GNU Emacs, but only under the conditions described in the
16: ;; GNU Emacs General Public License. A copy of this license is
17: ;; supposed to have been given to you along with GNU Emacs so you
18: ;; can know your rights and responsibilities. It should be in a
19: ;; file named COPYING. Among other things, the copyright notice
20: ;; and this notice must be preserved on all copies.
21:
22: (require 'shell)
23:
24: ;; I'm not sure, but I think somebody asked about running kermit under shell
25: ;; mode a while ago. Anyway, here is some code that I find useful. The result
26: ;; is that I can log onto machines with primitive operating systems (VMS and
27: ;; ATT system V :-), and still have the features of shell-mode available for
28: ;; command history, etc. It's also handy to be able to run a file transfer in
29: ;; an emacs window. The transfer is in the "background", but you can also
30: ;; monitor or stop it easily.
31:
32: ;; The ^\ key is bound to a function for sending escape sequences to kermit,
33: ;; and ^C^Q can be used to send any control characters needed thru to the
34: ;; system you connect to. A more serious problem is that some brain-dead
35: ;; systems will not recognize a ^J as an end-of-line character. So LFD is
36: ;; bound to a new function which acts just like CR usually does in shell-mode,
37: ;; but a ^M is sent as an end-of-line. Funcions are also provied to swap the
38: ;; bindings of CR and LFD. I've also included a filter which will clean out
39: ;; any ^M's or ^@'s that get typed at you, but I don't really recommend it.
40: ;; There doesn't seem to be an acceptably fast way to do this via emacs-lisp.
41: ;; Invoking kermit by the command " kermit | tr -d '\015' " seems to work
42: ;; better (on my system anyway).
43:
44: ;; Here's how I've been using this setup. We have several machines connected
45: ;; thru a fairly stupid terminal switch. If I want to connect to unix system,
46: ;; then I use the LFD key to talk to the switch, and ignore any ^M's in the
47: ;; buffer, and do a " stty -echo nl " after I log in. Then the only real
48: ;; differnce from being in local shell-mode is that it is you need to to type
49: ;; ^C^Q^C to send an interrupt, and ^C^Q^Z for a stop signal, etc. (since ^C^C
50: ;; just generates a local stop signal, which kermit ignores).
51: ;; To connect to a VMS system, I use a shell script to invoke kermit thru the
52: ;; tr filter, do "M-X kermit-send-cr", and then tell VMS that I'm on a half-duplex
53: ;; terminal.
54:
55: ;; Some caveats:
56: ;; 1) Kermit under shell mode is a real pain if you don't have pty's. I
57: ;; recently discovered this on our 3b2/400. When kermit can't find a tty, it
58: ;; assumes it is supposed to be in remote mode. So the simple command "kermit"
59: ;; won't work in shell mode on such a system. You can get around this by using
60: ;; the -c (connect) command line option, which means you also have to specify a
61: ;; line and baud on the command line, as in "kermit -l /dev/tty53 -b 9600 -c".
62: ;; However, this will cause kermit to exit when the connection is closed. So
63: ;; in order to do a file transfer, you have to think ahead and and add -r
64: ;; (receive) to the command line. This means that you can't use the server
65: ;; feature. The only fix I can see is to muck around with the source code for
66: ;; kermit, although this problably wouldn't be too hard. What is needed is an
67: ;; option to force kermit to be local, to use stdin and stdout for interactive
68: ;; speech, and to forget about cbreak mode.
69:
70: ;; 2) The "clean-filter" can be a troublesome item. The main problem arises if
71: ;; you are running a program under shell-mode which is doing periodic output,
72: ;; and you then try to switch to another buffer. I came across this while
73: ;; running kermit file transfers - kermit prints a dot each time a packet is
74: ;; received. Since emacs is interrupted each time a dot is printed, it becomes
75: ;; impossible to edit the other buffer. If you hit a key while the filter code
76: ;; is running, that character will wind up in the *shell* buffer instead of the
77: ;; current one! So you need to be careful to turn the filter off before
78: ;; leaving the buffer if a program is still running. In fact, you can't even
79: ;; use "M-x clean-shell-off" to do this, because you won't be able to type
80: ;; "clean-shell-off" in the minibuffer!! So you need to have this command
81: ;; bound to a keystroke.
82:
83: ;; Please let me know if any bugs turn up.
84: ;; Feb 1988, Jeff Norden - [email protected]
85:
86: (defvar kermit-esc-char "\C-\\" "*Kermit's escape char")
87:
88: (defun kermit-esc ()
89: "For sending escape sequences to a kermit running in shell mode."
90: (interactive)
91: (process-send-string
92: (get-buffer-process (current-buffer))
93: (concat kermit-esc-char (char-to-string (read-char)))))
94:
95: (defun kermit-send-char ()
96: "Send an arbitrary character to a program in shell mode."
97: (interactive)
98: (process-send-string
99: (get-buffer-process (current-buffer))
100: (char-to-string (read-char))))
101:
102: (define-key shell-mode-map "\C-\\" 'kermit-esc)
103: (define-key shell-mode-map "\C-c\C-q" 'kermit-send-char)
104: ;; extra bindings for folks suffering form ^S/^Q braindamage:
105: (define-key shell-mode-map "\C-c\\" 'kermit-esc)
106:
107: (defun shell-send-input-cr ()
108: "Like \\[shell-send-input] but end the line with carriage-return."
109: (interactive)
110: (end-of-line)
111: (if (eobp)
112: (progn
113: (move-marker last-input-start
114: (process-mark (get-buffer-process (current-buffer))))
115: (insert ?\n)
116: (move-marker last-input-end (point)))
117: (beginning-of-line)
118: (re-search-forward shell-prompt-pattern nil t)
119: (let ((copy (buffer-substring (point)
120: (progn (forward-line 1) (point)))))
121: (goto-char (point-max))
122: (move-marker last-input-start (point))
123: (insert copy)
124: (move-marker last-input-end (point))))
125: (condition-case ()
126: (save-excursion
127: (goto-char last-input-start)
128: (shell-set-directory))
129: (error (funcall shell-set-directory-error-hook)))
130: (let ((process (get-buffer-process (current-buffer))))
131: (process-send-region process last-input-start (- last-input-end 1))
132: (process-send-string process "\r")
133: (set-marker (process-mark process) (point))))
134:
135: ;; This is backwards of what makes sense, but ...
136: (define-key shell-mode-map "\n" 'shell-send-input-cr)
137:
138: (defun kermit-default-cr ()
139: "Make RETURN end the line with carriage-return and LFD end it with a newline.
140: This is useful for talking to other systems on which carriage-return
141: is the normal way to end a line."
142: (interactive)
143: (define-key shell-mode-map "\r" 'shell-send-input-cr)
144: (define-key shell-mode-map "\n" 'shell-send-input))
145:
146: (defun kermit-default-nl ()
147: "Make RETURN end the line with a newline char. This is the default state.
148: In this state, use LFD to send a line and end it with a carriage-return."
149: (interactive)
150: (define-key shell-mode-map "\n" 'shell-send-input-cr)
151: (define-key shell-mode-map "\r" 'shell-send-input))
152:
153: ;; This filter works, but I don't especially recommend it.
154: (defun kermit-clean-filter (process string)
155: "A process filter which deletes all ^M's and ^@'s from the output."
156: (set-buffer (process-buffer process))
157: (let
158: ((firstpos (string-match "[^\C-@\r]+" string))
159: (buffermark (process-mark process))
160: (oldpt (point))
161: (newstring '"")
162: goback)
163: (while firstpos
164: (setq newstring
165: (concat newstring (substring string firstpos (match-end 0))))
166: (setq firstpos (string-match "[^\C-@\r]+" string (match-end 0))))
167: (goto-char (marker-position buffermark))
168: (setq goback (< oldpt (point)))
169: (insert newstring)
170: (set-marker buffermark (point))
171: (if goback (goto-char oldpt))))
172:
173: (defun kermit-clean-on ()
174: "Delete all null characters and ^M's from the kermit output.
175: Note that another (perhaps better) way to do this is to use the
176: command `kermit | tr -d '\\015''."
177: (interactive)
178: (set-process-filter (get-buffer-process (current-buffer))
179: 'kermit-clean-filter))
180:
181: (defun kermit-clean-off ()
182: "Cancel a previous kermit-clean-shell-on command"
183: (interactive)
184: (set-process-filter (get-buffer-process (current-buffer)) nil))
185:
186:
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