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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, 675 Mass Ave, Cambridge, MA 02139, 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 $.
(defun make-auto-save-file-name ()
"Return file name to use for auto-saves of current buffer.
Does not consider auto-save-visited-file-name; that is checked
before calling this function.
This is a separate function so your .emacs file or site-init.el can redefine it.
See also auto-save-file-name-p."
(if buffer-file-name
(concat (file-name-directory buffer-file-name)
"_$"
(file-name-nondirectory buffer-file-name)
"$")
(expand-file-name (concat "_$_" (make-legal-file-name (buffer-name)) "$"))))
(defun auto-save-file-name-p (filename)
"Return t if FILENAME can be yielded by make-auto-save-file-name.
FILENAME should lack slashes.
This is a separate function so your .emacs file or site-init.el can redefine it."
(string-match "^_\\$.*\\$" 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
|
