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Annotation of 43BSDReno/contrib/emacs-18.55/lisp/kermit.el, revision 1.1

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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