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- ;;; vms-patch.el --- override parts of files.el for VMS.
-
- ;; Copyright (C) 1986, 1992 Free Software Foundation, Inc.
-
- ;; Maintainer: FSF
- ;; Keywords: vms
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Code:
-
- ;;; Functions that need redefinition
-
- ;;; VMS file names are upper case, but buffer names are more
- ;;; convenient in lower case.
-
- (defun create-file-buffer (filename)
- "Create a suitably named buffer for visiting FILENAME, and return it.
- FILENAME (sans directory) is used unchanged if that name is free;
- otherwise a string <2> or <3> or ... is appended to get an unused name."
- (generate-new-buffer (downcase (file-name-nondirectory filename))))
-
- ;;; Given a string FN, return a similar name which is a legal VMS filename.
- ;;; This is used to avoid invalid auto save file names.
- (defun make-legal-file-name (fn)
- (setq fn (copy-sequence fn))
- (let ((dot nil) (indx 0) (len (length fn)) chr)
- (while (< indx len)
- (setq chr (aref fn indx))
- (cond
- ((eq chr ?.) (if dot (aset fn indx ?_) (setq dot t)))
- ((not (or (and (>= chr ?a) (<= chr ?z)) (and (>= chr ?A) (<= chr ?Z))
- (and (>= chr ?0) (<= chr ?9))
- (eq chr ?$) (eq chr ?_) (and (eq chr ?-) (> indx 0))))
- (aset fn indx ?_)))
- (setq indx (1+ indx))))
- fn)
-
- ;;; Auto save filesnames start with _$ and end with $.
-
- (defun make-auto-save-file-name ()
- "Return file name to use for auto-saves of current buffer.
- This function does not consider `auto-save-visited-file-name';
- the caller should check that before calling this function.
- This is a separate function so that your `.emacs' file or the site's
- `site-init.el' can redefine it.
- See also `auto-save-file-name-p'."
- (if buffer-file-name
- (concat (file-name-directory buffer-file-name)
- "_$"
- (file-name-nondirectory buffer-file-name)
- "$")
- (expand-file-name (concat "_$_" (make-legal-file-name (buffer-name)) "$"))))
-
- (defun auto-save-file-name-p (filename)
- "Return t if FILENAME can be yielded by `make-auto-save-file-name'.
- FILENAME should lack slashes.
- This is a separate function so that your `.emacs' file or the site's
- `site-init.el' can redefine it."
- (string-match "^_\\$.*\\$" filename))
-
- ;;;
- ;;; This goes along with kepteditor.com which defines these logicals
- ;;; If EMACS_COMMAND_ARGS is defined, it supersedes EMACS_FILE_NAME,
- ;;; which is probably set up incorrectly anyway.
- ;;; The function command-line-again is a kludge, but it does the job.
- ;;;
- (defun vms-suspend-resume-hook ()
- "When resuming suspended Emacs, check for file to be found.
- If the logical name `EMACS_FILE_NAME' is defined, `find-file' that file."
- (let ((file (vms-system-info "LOGICAL" "EMACS_FILE_NAME"))
- (args (vms-system-info "LOGICAL" "EMACS_COMMAND_ARGS"))
- (line (vms-system-info "LOGICAL" "EMACS_FILE_LINE")))
- (if (not args)
- (if file
- (progn (find-file file)
- (if line (goto-line (string-to-int line)))))
- (cd (file-name-directory file))
- (vms-command-line-again))))
-
- (setq suspend-resume-hook 'vms-suspend-resume-hook)
-
- (defun vms-suspend-hook ()
- "Don't allow suspending if logical name `DONT_SUSPEND_EMACS' is defined."
- (if (vms-system-info "LOGICAL" "DONT_SUSPEND_EMACS")
- (error "Can't suspend this emacs"))
- nil)
-
- (setq suspend-hook 'vms-suspend-hook)
-
- ;;;
- ;;; A kludge that allows reprocessing of the command line. This is mostly
- ;;; to allow a spawned VMS mail process to do something reasonable when
- ;;; used in conjunction with the modifications to sysdep.c that allow
- ;;; Emacs to attach to a "foster" parent.
- ;;;
- (defun vms-command-line-again ()
- "Reprocess command line arguments. VMS specific.
- Command line arguments are initialized from the logical EMACS_COMMAND_ARGS
- which is defined by kepteditor.com. On VMS this allows attaching to a
- spawned Emacs and doing things like \"emacs -l myfile.el -f doit\""
- (let* ((args (downcase (vms-system-info "LOGICAL" "EMACS_COMMAND_ARGS")))
- (command-line-args (list "emacs"))
- (beg 0)
- (end 0)
- (len (length args))
- this-char)
- (if args
- (progn
- ;;; replace non-printable stuff with spaces
- (while (< beg (length args))
- (if (or (> 33 (setq this-char (aref args beg)))
- (< 127 this-char))
- (aset args beg 32))
- (setq beg (1+ beg)))
- (setq beg (1- (length args)))
- (while (= 32 (aref args beg)) (setq beg (1- beg)))
- (setq args (substring args 0 (1+ beg)))
- (setq beg 0)
- ;;; now start parsing args
- (while (< beg (length args))
- (while (and (< beg (length args))
- (or (> 33 (setq this-char (aref args beg)))
- (< 127 this-char))
- (setq beg (1+ beg))))
- (setq end (1+ beg))
- (while (and (< end (length args))
- (< 32 (setq this-char (aref args end)))
- (> 127 this-char))
- (setq end (1+ end)))
- (setq command-line-args (append
- command-line-args
- (list (substring args beg end))))
- (setq beg (1+ end)))
- (command-line)))))
-
- (defun vms-read-directory (dirname switches buffer)
- (save-excursion
- (set-buffer buffer)
- (subprocess-command-to-buffer
- (concat "DIRECTORY " switches " " dirname)
- buffer)
- (goto-char (point-min))
- ;; Remove all the trailing blanks.
- (while (search-forward " \n")
- (forward-char -1)
- (delete-horizontal-space))
- (goto-char (point-min))))
-
- (setq dired-listing-switches
- "/SIZE/DATE/OWNER/WIDTH=(FILENAME=32,SIZE=5)")
-
- (setq print-region-function
- '(lambda (start end command ign1 ign2 ign3 &rest switches)
- (write-region start end "sys$login:delete-me.txt")
- (send-command-to-subprocess
- 1
- (concat command
- " sys$login:delete-me.txt/name=\"GNUprintbuffer\" "
- (mapconcat 'identity switches " "))
- nil nil nil)))
-
- ;;;
- ;;; Fuctions for using Emacs as a VMS Mail editor
- ;;;
- (autoload 'vms-pmail-setup "vms-pmail"
- "Set up file assuming use by VMS Mail utility.
- The buffer is put into text-mode, auto-save is turned off and the
- following bindings are established.
-
- \\[vms-pmail-save-and-exit] vms-pmail-save-and-exit
- \\[vms-pmail-abort] vms-pmail-abort
-
- All other Emacs commands are still available."
- t)
-
- ;;; vms-patch.el ends here
-