Return to kermit.el CVS log

Up to [Apple XNU] / GNUtools / emacs / lisp

Annotation of GNUtools/emacs/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 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: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.