| 1 | ;;; vms-patch.el --- override parts of files.el for VMS. |
| 2 | |
| 3 | ;; Copyright (C) 1986, 1992 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Maintainer: FSF |
| 6 | ;; Keywords: vms |
| 7 | |
| 8 | ;; This file is part of GNU Emacs. |
| 9 | |
| 10 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by |
| 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
| 13 | ;; any later version. |
| 14 | |
| 15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ;; GNU General Public License for more details. |
| 19 | |
| 20 | ;; You should have received a copy of the GNU General Public License |
| 21 | ;; along with GNU Emacs; see the file COPYING. If not, write to |
| 22 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | |
| 24 | ;;; Code: |
| 25 | |
| 26 | ;;; Functions that need redefinition |
| 27 | |
| 28 | ;;; VMS file names are upper case, but buffer names are more |
| 29 | ;;; convenient in lower case. |
| 30 | |
| 31 | (defun create-file-buffer (filename) |
| 32 | "Create a suitably named buffer for visiting FILENAME, and return it. |
| 33 | FILENAME (sans directory) is used unchanged if that name is free; |
| 34 | otherwise a string <2> or <3> or ... is appended to get an unused name." |
| 35 | (generate-new-buffer (downcase (file-name-nondirectory filename)))) |
| 36 | |
| 37 | ;;; Given a string FN, return a similar name which is a legal VMS filename. |
| 38 | ;;; This is used to avoid invalid auto save file names. |
| 39 | (defun make-legal-file-name (fn) |
| 40 | (setq fn (copy-sequence fn)) |
| 41 | (let ((dot nil) (indx 0) (len (length fn)) chr) |
| 42 | (while (< indx len) |
| 43 | (setq chr (aref fn indx)) |
| 44 | (cond |
| 45 | ((eq chr ?.) (if dot (aset fn indx ?_) (setq dot t))) |
| 46 | ((not (or (and (>= chr ?a) (<= chr ?z)) (and (>= chr ?A) (<= chr ?Z)) |
| 47 | (and (>= chr ?0) (<= chr ?9)) |
| 48 | (eq chr ?$) (eq chr ?_) (and (eq chr ?-) (> indx 0)))) |
| 49 | (aset fn indx ?_))) |
| 50 | (setq indx (1+ indx)))) |
| 51 | fn) |
| 52 | |
| 53 | ;;; Auto save filesnames start with _$ and end with $. |
| 54 | |
| 55 | (defun make-auto-save-file-name () |
| 56 | "Return file name to use for auto-saves of current buffer. |
| 57 | Does not consider auto-save-visited-file-name; that is checked |
| 58 | before calling this function. |
| 59 | This is a separate function so your .emacs file or site-init.el can redefine it. |
| 60 | See also auto-save-file-name-p." |
| 61 | (if buffer-file-name |
| 62 | (concat (file-name-directory buffer-file-name) |
| 63 | "_$" |
| 64 | (file-name-nondirectory buffer-file-name) |
| 65 | "$") |
| 66 | (expand-file-name (concat "_$_" (make-legal-file-name (buffer-name)) "$")))) |
| 67 | |
| 68 | (defun auto-save-file-name-p (filename) |
| 69 | "Return t if FILENAME can be yielded by make-auto-save-file-name. |
| 70 | FILENAME should lack slashes. |
| 71 | This is a separate function so your .emacs file or site-init.el can redefine it." |
| 72 | (string-match "^_\\$.*\\$" filename)) |
| 73 | |
| 74 | ;;; |
| 75 | ;;; This goes along with kepteditor.com which defines these logicals |
| 76 | ;;; If EMACS_COMMAND_ARGS is defined, it supersedes EMACS_FILE_NAME, |
| 77 | ;;; which is probably set up incorrectly anyway. |
| 78 | ;;; The function command-line-again is a kludge, but it does the job. |
| 79 | ;;; |
| 80 | (defun vms-suspend-resume-hook () |
| 81 | "When resuming suspended Emacs, check for file to be found. |
| 82 | If the logical name `EMACS_FILE_NAME' is defined, `find-file' that file." |
| 83 | (let ((file (vms-system-info "LOGICAL" "EMACS_FILE_NAME")) |
| 84 | (args (vms-system-info "LOGICAL" "EMACS_COMMAND_ARGS")) |
| 85 | (line (vms-system-info "LOGICAL" "EMACS_FILE_LINE"))) |
| 86 | (if (not args) |
| 87 | (if file |
| 88 | (progn (find-file file) |
| 89 | (if line (goto-line (string-to-int line))))) |
| 90 | (cd (file-name-directory file)) |
| 91 | (vms-command-line-again)))) |
| 92 | |
| 93 | (setq suspend-resume-hook 'vms-suspend-resume-hook) |
| 94 | |
| 95 | (defun vms-suspend-hook () |
| 96 | "Don't allow suspending if logical name `DONT_SUSPEND_EMACS' is defined." |
| 97 | (if (vms-system-info "LOGICAL" "DONT_SUSPEND_EMACS") |
| 98 | (error "Can't suspend this emacs")) |
| 99 | nil) |
| 100 | |
| 101 | (setq suspend-hook 'vms-suspend-hook) |
| 102 | |
| 103 | ;;; |
| 104 | ;;; A kludge that allows reprocessing of the command line. This is mostly |
| 105 | ;;; to allow a spawned VMS mail process to do something reasonable when |
| 106 | ;;; used in conjunction with the modifications to sysdep.c that allow |
| 107 | ;;; Emacs to attach to a "foster" parent. |
| 108 | ;;; |
| 109 | (defun vms-command-line-again () |
| 110 | "Reprocess command line arguments. VMS specific. |
| 111 | Command line arguments are initialized from the logical EMACS_COMMAND_ARGS |
| 112 | which is defined by kepteditor.com. On VMS this allows attaching to a |
| 113 | spawned Emacs and doing things like \"emacs -l myfile.el -f doit\"" |
| 114 | (let* ((args (downcase (vms-system-info "LOGICAL" "EMACS_COMMAND_ARGS"))) |
| 115 | (command-line-args (list "emacs")) |
| 116 | (beg 0) |
| 117 | (end 0) |
| 118 | (len (length args)) |
| 119 | this-char) |
| 120 | (if args |
| 121 | (progn |
| 122 | ;;; replace non-printable stuff with spaces |
| 123 | (while (< beg (length args)) |
| 124 | (if (or (> 33 (setq this-char (aref args beg))) |
| 125 | (< 127 this-char)) |
| 126 | (aset args beg 32)) |
| 127 | (setq beg (1+ beg))) |
| 128 | (setq beg (1- (length args))) |
| 129 | (while (= 32 (aref args beg)) (setq beg (1- beg))) |
| 130 | (setq args (substring args 0 (1+ beg))) |
| 131 | (setq beg 0) |
| 132 | ;;; now start parsing args |
| 133 | (while (< beg (length args)) |
| 134 | (while (and (< beg (length args)) |
| 135 | (or (> 33 (setq this-char (aref args beg))) |
| 136 | (< 127 this-char)) |
| 137 | (setq beg (1+ beg)))) |
| 138 | (setq end (1+ beg)) |
| 139 | (while (and (< end (length args)) |
| 140 | (< 32 (setq this-char (aref args end))) |
| 141 | (> 127 this-char)) |
| 142 | (setq end (1+ end))) |
| 143 | (setq command-line-args (append |
| 144 | command-line-args |
| 145 | (list (substring args beg end)))) |
| 146 | (setq beg (1+ end))) |
| 147 | (command-line))))) |
| 148 | |
| 149 | (defun vms-read-directory (dirname switches buffer) |
| 150 | (save-excursion |
| 151 | (set-buffer buffer) |
| 152 | (subprocess-command-to-buffer |
| 153 | (concat "DIRECTORY " switches " " dirname) |
| 154 | buffer) |
| 155 | (goto-char (point-min)) |
| 156 | ;; Remove all the trailing blanks. |
| 157 | (while (search-forward " \n") |
| 158 | (forward-char -1) |
| 159 | (delete-horizontal-space)) |
| 160 | (goto-char (point-min)))) |
| 161 | |
| 162 | (setq dired-listing-switches |
| 163 | "/SIZE/DATE/OWNER/WIDTH=(FILENAME=32,SIZE=5)") |
| 164 | |
| 165 | (setq print-region-function |
| 166 | '(lambda (start end command ign1 ign2 ign3 &rest switches) |
| 167 | (write-region start end "sys$login:delete-me.txt") |
| 168 | (send-command-to-subprocess |
| 169 | 1 |
| 170 | (concat command |
| 171 | " sys$login:delete-me.txt/name=\"GNUprintbuffer\" " |
| 172 | (mapconcat 'identity switches " ")) |
| 173 | nil nil nil))) |
| 174 | |
| 175 | ;;; |
| 176 | ;;; Fuctions for using Emacs as a VMS Mail editor |
| 177 | ;;; |
| 178 | (autoload 'vms-pmail-setup "vms-pmail" |
| 179 | "Set up file assuming use by VMS Mail utility. |
| 180 | The buffer is put into text-mode, auto-save is turned off and the |
| 181 | following bindings are established. |
| 182 | |
| 183 | \\[vms-pmail-save-and-exit] vms-pmail-save-and-exit |
| 184 | \\[vms-pmail-abort] vms-pmail-abort |
| 185 | |
| 186 | All other Emacs commands are still available." |
| 187 | t) |
| 188 | |
| 189 | ;;; vms-patch.el ends here |