HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| c0274f38 ER |
1 | ;;; files.el --- file input and output commands for Emacs |
| 2 | ||
| e5167999 ER |
3 | ;; Maintainer: FSF |
| 4 | ;; Last-Modified: 09 Jul 92 | |
| 5 | ||
| 8c0e7b73 | 6 | ;; Copyright (C) 1985, 1986, 1987, 1992 Free Software Foundation, Inc. |
| b4da00e9 RM |
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 | |
| e5167999 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
| b4da00e9 RM |
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 | ||
| e5167999 ER |
24 | ;;; Code: |
| 25 | ||
| b4da00e9 RM |
26 | (defconst delete-auto-save-files t |
| 27 | "*Non-nil means delete a buffer's auto-save file when the buffer is saved.") | |
| 28 | ||
| 29 | (defconst directory-abbrev-alist | |
| 30 | nil | |
| 31 | "*Alist of abbreviations for file directories. | |
| 32 | A list of elements of the form (FROM . TO), each meaning to replace | |
| 33 | FROM with TO when it appears in a directory name. This replacement is | |
| 34 | done when setting up the default directory of a newly visited file. | |
| 35 | *Every* FROM string should start with `^'. | |
| 36 | ||
| 37 | Use this feature when you have directories which you normally refer to | |
| 38 | via absolute symbolic links. Make TO the name of the link, and FROM | |
| 39 | the name it is linked to.") | |
| 40 | ||
| 41 | ;;; Turn off backup files on VMS since it has version numbers. | |
| 42 | (defconst make-backup-files (not (eq system-type 'vax-vms)) | |
| 43 | "*Create a backup of each file when it is saved for the first time. | |
| 44 | This can be done by renaming the file or by copying. | |
| 45 | ||
| 46 | Renaming means that Emacs renames the existing file so that it is a | |
| 47 | backup file, then writes the buffer into a new file. Any other names | |
| 48 | that the old file had will now refer to the backup file. The new file | |
| 49 | is owned by you and its group is defaulted. | |
| 50 | ||
| 51 | Copying means that Emacs copies the existing file into the backup | |
| 52 | file, then writes the buffer on top of the existing file. Any other | |
| 53 | names that the old file had will now refer to the new (edited) file. | |
| 54 | The file's owner and group are unchanged. | |
| 55 | ||
| 56 | The choice of renaming or copying is controlled by the variables | |
| 57 | `backup-by-copying', `backup-by-copying-when-linked' and | |
| 58 | `backup-by-copying-when-mismatch'.") | |
| 59 | ||
| 60 | ;; Do this so that local variables based on the file name | |
| 61 | ;; are not overridden by the major mode. | |
| 62 | (defvar backup-inhibited nil | |
| 63 | "Non-nil means don't make a backup file for this buffer.") | |
| 64 | (put 'backup-inhibited 'permanent-local t) | |
| 65 | ||
| 66 | (defconst backup-by-copying nil | |
| 67 | "*Non-nil means always use copying to create backup files. | |
| 68 | See documentation of variable `make-backup-files'.") | |
| 69 | ||
| 70 | (defconst backup-by-copying-when-linked nil | |
| 71 | "*Non-nil means use copying to create backups for files with multiple names. | |
| 72 | This causes the alternate names to refer to the latest version as edited. | |
| 73 | This variable is relevant only if `backup-by-copying' is nil.") | |
| 74 | ||
| 75 | (defconst backup-by-copying-when-mismatch nil | |
| 76 | "*Non-nil means create backups by copying if this preserves owner or group. | |
| 77 | Renaming may still be used (subject to control of other variables) | |
| 78 | when it would not result in changing the owner or group of the file; | |
| 79 | that is, for files which are owned by you and whose group matches | |
| 80 | the default for a new file created there by you. | |
| 81 | This variable is relevant only if `backup-by-copying' is nil.") | |
| 82 | ||
| 83 | (defvar backup-enable-predicate | |
| 84 | '(lambda (name) | |
| 85 | (or (< (length name) 5) | |
| 86 | (not (string-equal "/tmp/" (substring name 0 5))))) | |
| 87 | "Predicate that looks at a file name and decides whether to make backups. | |
| 88 | Called with an absolute file name as argument, it returns t to enable backup.") | |
| 89 | ||
| 90 | (defconst buffer-offer-save nil | |
| 91 | "*Non-nil in a buffer means offer to save the buffer on exit | |
| 92 | even if the buffer is not visiting a file. | |
| 93 | Automatically local in all buffers.") | |
| 94 | (make-variable-buffer-local 'buffer-offer-save) | |
| 95 | ||
| 96 | (defconst file-precious-flag nil | |
| 97 | "*Non-nil means protect against I/O errors while saving files. | |
| 98 | Some modes set this non-nil in particular buffers.") | |
| 99 | ||
| 100 | (defvar version-control nil | |
| 101 | "*Control use of version numbers for backup files. | |
| 102 | t means make numeric backup versions unconditionally. | |
| 103 | nil means make them for files that have some already. | |
| 104 | never means do not make them.") | |
| 105 | ||
| 106 | (defvar dired-kept-versions 2 | |
| 107 | "*When cleaning directory, number of versions to keep.") | |
| 108 | ||
| 109 | (defvar trim-versions-without-asking nil | |
| 6d74b528 ER |
110 | "*If t, deletes excess backup versions silently. |
| 111 | If nil, asks confirmation. Any other value prevents any trimming.") | |
| b4da00e9 RM |
112 | |
| 113 | (defvar kept-old-versions 2 | |
| 114 | "*Number of oldest versions to keep when a new numbered backup is made.") | |
| 115 | ||
| 116 | (defvar kept-new-versions 2 | |
| 117 | "*Number of newest versions to keep when a new numbered backup is made. | |
| 118 | Includes the new backup. Must be > 0") | |
| 119 | ||
| 120 | (defconst require-final-newline nil | |
| 121 | "*Value of t says silently ensure a file ends in a newline when it is saved. | |
| 122 | Non-nil but not t says ask user whether to add a newline when there isn't one. | |
| 123 | nil means don't add newlines.") | |
| 124 | ||
| 125 | (defconst auto-save-default t | |
| 126 | "*Non-nil says by default do auto-saving of every file-visiting buffer.") | |
| 127 | ||
| 128 | (defconst auto-save-visited-file-name nil | |
| 129 | "*Non-nil says auto-save a buffer in the file it is visiting, when practical. | |
| 130 | Normally auto-save files are written under other names.") | |
| 131 | ||
| 132 | (defconst save-abbrevs nil | |
| 133 | "*Non-nil means save word abbrevs too when files are saved. | |
| 134 | Loading an abbrev file sets this to t.") | |
| 135 | ||
| 136 | (defconst find-file-run-dired t | |
| 137 | "*Non-nil says run dired if find-file is given the name of a directory.") | |
| 138 | ||
| 139 | (put 'find-file-not-found-hooks 'permanent-local t) | |
| 140 | (defvar find-file-not-found-hooks nil | |
| 141 | "List of functions to be called for `find-file' on nonexistent file. | |
| 142 | These functions are called as soon as the error is detected. | |
| 143 | `buffer-file-name' is already set up. | |
| 144 | The functions are called in the order given until one of them returns non-nil.") | |
| 145 | ||
| 146 | (put 'find-file-hooks 'permanent-local t) | |
| 147 | (defvar find-file-hooks nil | |
| 148 | "List of functions to be called after a buffer is loaded from a file. | |
| 149 | The buffer's local variables (if any) will have been processed before the | |
| 150 | functions are called.") | |
| 151 | ||
| 152 | (put 'write-file-hooks 'permanent-local t) | |
| 153 | (defvar write-file-hooks nil | |
| 154 | "List of functions to be called before writing out a buffer to a file. | |
| 155 | If one of them returns non-nil, the file is considered already written | |
| 8c0e7b73 JB |
156 | and the rest are not called. |
| 157 | These hooks are considered to pertain to the visited file. | |
| 158 | So this list is cleared if you change the visited file name. | |
| 159 | See also `write-contents-hooks'.") | |
| 160 | ||
| 161 | (defvar write-contents-hooks nil | |
| 162 | "List of functions to be called before writing out a buffer to a file. | |
| 163 | If one of them returns non-nil, the file is considered already written | |
| 164 | and the rest are not called. | |
| 165 | These hooks are considered to pertain to the buffer's contents, | |
| 166 | not to the particular visited file; thus, `set-visited-file-name' does | |
| 167 | not clear this variable, but changing the major mode does clear it. | |
| 168 | See also `write-file-hooks'.") | |
| b4da00e9 RM |
169 | |
| 170 | (defconst enable-local-variables t | |
| 171 | "*Control use of local-variables lists in files you visit. | |
| 172 | The value can be t, nil or something else. | |
| 173 | A value of t means local-variables lists are obeyed; | |
| 174 | nil means they are ignored; anything else means query. | |
| 175 | ||
| 176 | The command \\[normal-mode] always obeys local-variables lists | |
| 177 | and ignores this variable.") | |
| 178 | ||
| d207b766 RS |
179 | (defconst enable-local-eval nil |
| 180 | "*Control processing of the \"variable\" `eval' in a file's local variables. | |
| 181 | The value can be t, nil or something else. | |
| 182 | A value of t means obey `eval' variables; | |
| 183 | nil means ignore them; anything else means query. | |
| 184 | ||
| 185 | The command \\[normal-mode] always obeys local-variables lists | |
| 186 | and ignores this variable.") | |
| b4da00e9 RM |
187 | |
| 188 | ;; Avoid losing in versions where CLASH_DETECTION is disabled. | |
| 189 | (or (fboundp 'lock-buffer) | |
| 190 | (fset 'lock-buffer 'ignore)) | |
| 191 | (or (fboundp 'unlock-buffer) | |
| 192 | (fset 'unlock-buffer 'ignore)) | |
| 193 | \f | |
| 194 | (defun pwd () | |
| 195 | "Show the current default directory." | |
| 196 | (interactive nil) | |
| 197 | (message "Directory %s" default-directory)) | |
| 198 | ||
| 199 | (defun cd (dir) | |
| 200 | "Make DIR become the current buffer's default directory." | |
| 201 | (interactive "DChange default directory: ") | |
| 202 | (setq dir (expand-file-name dir)) | |
| 203 | (if (not (eq system-type 'vax-vms)) | |
| 204 | (setq dir (file-name-as-directory dir))) | |
| 205 | (if (not (file-directory-p dir)) | |
| 206 | (error "%s is not a directory" dir) | |
| 207 | (if (file-executable-p dir) | |
| 208 | (setq default-directory dir) | |
| 209 | (error "Cannot cd to %s: Permission denied" dir))) | |
| 5bbbceb1 JB |
210 | ;; We used to call pwd at this point. That's not terribly helpful |
| 211 | ;; when we're invoking cd interactively, and the new cmushell-based | |
| 212 | ;; shell has its own (better) facilities for this. | |
| 213 | ) | |
| b4da00e9 RM |
214 | |
| 215 | (defun load-file (file) | |
| 216 | "Load the Lisp file named FILE." | |
| 217 | (interactive "fLoad file: ") | |
| 218 | (load (expand-file-name file) nil nil t)) | |
| 219 | ||
| 220 | (defun load-library (library) | |
| 221 | "Load the library named LIBRARY. | |
| 222 | This is an interface to the function `load'." | |
| 223 | (interactive "sLoad library: ") | |
| 224 | (load library)) | |
| 225 | \f | |
| 226 | (defun switch-to-buffer-other-window (buffer) | |
| 227 | "Select buffer BUFFER in another window." | |
| 228 | (interactive "BSwitch to buffer in other window: ") | |
| 229 | (let ((pop-up-windows t)) | |
| 230 | (pop-to-buffer buffer t))) | |
| 231 | ||
| f98955ea JB |
232 | (defun switch-to-buffer-other-frame (buffer) |
| 233 | "Switch to buffer BUFFER in another frame." | |
| 234 | (interactive "BSwitch to buffer in other frame: ") | |
| 235 | (let ((pop-up-frames t)) | |
| 5bbbceb1 JB |
236 | (pop-to-buffer buffer))) |
| 237 | ||
| b4da00e9 RM |
238 | (defun find-file (filename) |
| 239 | "Edit file FILENAME. | |
| 240 | Switch to a buffer visiting file FILENAME, | |
| 241 | creating one if none already exists." | |
| 242 | (interactive "FFind file: ") | |
| 243 | (switch-to-buffer (find-file-noselect filename))) | |
| 244 | ||
| 245 | (defun find-file-other-window (filename) | |
| 246 | "Edit file FILENAME, in another window. | |
| 247 | May create a new window, or reuse an existing one. | |
| 248 | See the function `display-buffer'." | |
| 249 | (interactive "FFind file in other window: ") | |
| 250 | (switch-to-buffer-other-window (find-file-noselect filename))) | |
| 251 | ||
| f98955ea JB |
252 | (defun find-file-other-frame (filename) |
| 253 | "Edit file FILENAME, in another frame. | |
| 254 | May create a new frame, or reuse an existing one. | |
| 5bbbceb1 | 255 | See the function `display-buffer'." |
| f98955ea JB |
256 | (interactive "FFind file in other frame: ") |
| 257 | (switch-to-buffer-other-frame (find-file-noselect filename))) | |
| 5bbbceb1 | 258 | |
| b4da00e9 RM |
259 | (defun find-file-read-only (filename) |
| 260 | "Edit file FILENAME but don't allow changes. | |
| 261 | Like \\[find-file] but marks buffer as read-only. | |
| 262 | Use \\[toggle-read-only] to permit editing." | |
| 263 | (interactive "fFind file read-only: ") | |
| 264 | (find-file filename) | |
| 265 | (setq buffer-read-only t)) | |
| 266 | ||
| 267 | (defun find-file-read-only-other-window (filename) | |
| 268 | "Edit file FILENAME in another window but don't allow changes. | |
| 269 | Like \\[find-file-other-window] but marks buffer as read-only. | |
| 270 | Use \\[toggle-read-only] to permit editing." | |
| 271 | (interactive "fFind file read-only other window: ") | |
| 272 | (find-file filename) | |
| 273 | (setq buffer-read-only t)) | |
| 274 | ||
| f98955ea JB |
275 | (defun find-file-read-only-other-frame (filename) |
| 276 | "Edit file FILENAME in another frame but don't allow changes. | |
| 277 | Like \\[find-file-other-frame] but marks buffer as read-only. | |
| 5bbbceb1 | 278 | Use \\[toggle-read-only] to permit editing." |
| f98955ea JB |
279 | (interactive "fFind file read-only other frame: ") |
| 280 | (find-file-other-frame filename) | |
| 5bbbceb1 JB |
281 | (setq buffer-read-only t)) |
| 282 | ||
| b4da00e9 RM |
283 | (defun find-alternate-file (filename) |
| 284 | "Find file FILENAME, select its buffer, kill previous buffer. | |
| 285 | If the current buffer now contains an empty file that you just visited | |
| 286 | \(presumably by mistake), use this command to visit the file you really want." | |
| 287 | (interactive | |
| 288 | (let ((file buffer-file-name) | |
| 289 | (file-name nil) | |
| 290 | (file-dir nil)) | |
| 291 | (and file | |
| 292 | (setq file-name (file-name-nondirectory file) | |
| 293 | file-dir (file-name-directory file))) | |
| 294 | (list (read-file-name "Find alternate file: " file-dir nil nil file-name)))) | |
| 295 | (and (buffer-modified-p) | |
| 296 | ;; (not buffer-read-only) | |
| 297 | (not (yes-or-no-p (format "Buffer %s is modified; kill anyway? " | |
| 298 | (buffer-name)))) | |
| 299 | (error "Aborted")) | |
| 300 | (let ((obuf (current-buffer)) | |
| 301 | (ofile buffer-file-name) | |
| 302 | (oname (buffer-name))) | |
| 303 | (rename-buffer " **lose**") | |
| 304 | (setq buffer-file-name nil) | |
| 305 | (unwind-protect | |
| 306 | (progn | |
| 307 | (unlock-buffer) | |
| 308 | (find-file filename)) | |
| 309 | (cond ((eq obuf (current-buffer)) | |
| 310 | (setq buffer-file-name ofile) | |
| 311 | (lock-buffer) | |
| 312 | (rename-buffer oname)))) | |
| 313 | (or (eq (current-buffer) obuf) | |
| 314 | (kill-buffer obuf)))) | |
| 315 | ||
| 316 | (defun create-file-buffer (filename) | |
| 317 | "Create a suitably named buffer for visiting FILENAME, and return it. | |
| 318 | FILENAME (sans directory) is used unchanged if that name is free; | |
| 319 | otherwise a string <2> or <3> or ... is appended to get an unused name." | |
| 320 | (let ((lastname (file-name-nondirectory filename))) | |
| 321 | (if (string= lastname "") | |
| 322 | (setq lastname filename)) | |
| 323 | (generate-new-buffer lastname))) | |
| 324 | ||
| 5bbbceb1 JB |
325 | (defun generate-new-buffer (name) |
| 326 | "Create and return a buffer with a name based on NAME. | |
| 327 | Choose the buffer's name using generate-new-buffer-name." | |
| 328 | (get-buffer-create (generate-new-buffer-name name))) | |
| 329 | ||
| e373f201 JB |
330 | (defconst automount-dir-prefix "^/tmp_mnt/" |
| 331 | "Regexp to match the automounter prefix in a directory name.") | |
| 332 | ||
| 5bbbceb1 JB |
333 | (defun abbreviate-file-name (filename) |
| 334 | "Return a version of FILENAME shortened using directory-abbrev-alist. | |
| 335 | This also substitutes \"~\" for the user's home directory. | |
| 336 | See \\[describe-variable] directory-abbrev-alist RET for more information." | |
| e373f201 JB |
337 | ;; Get rid of the prefixes added by the automounter. |
| 338 | (if (and (string-match automount-dir-prefix filename) | |
| 339 | (file-exists-p (file-name-directory | |
| 340 | (substring filename (1- (match-end 0)))))) | |
| 341 | (setq filename (substring filename (1- (match-end 0))))) | |
| 5bbbceb1 JB |
342 | (let ((tail directory-abbrev-alist)) |
| 343 | (while tail | |
| 344 | (if (string-match (car (car tail)) filename) | |
| 345 | (setq filename | |
| 346 | (concat (cdr (car tail)) (substring filename (match-end 0))))) | |
| 347 | (setq tail (cdr tail))) | |
| 348 | (if (string-match (concat "^" (expand-file-name "~")) filename) | |
| 349 | (setq filename | |
| 350 | (concat "~" (substring filename (match-end 0))))) | |
| 351 | filename)) | |
| 352 | ||
| b4da00e9 RM |
353 | (defun find-file-noselect (filename &optional nowarn) |
| 354 | "Read file FILENAME into a buffer and return the buffer. | |
| 355 | If a buffer exists visiting FILENAME, return that one, but | |
| 356 | verify that the file has not changed since visited or saved. | |
| 357 | The buffer is not selected, just returned to the caller." | |
| e373f201 JB |
358 | (setq filename |
| 359 | (abbreviate-file-name | |
| 360 | (expand-file-name filename))) | |
| b4da00e9 RM |
361 | (if (file-directory-p filename) |
| 362 | (if find-file-run-dired | |
| 363 | (dired-noselect filename) | |
| 364 | (error "%s is a directory." filename)) | |
| 365 | (let ((buf (get-file-buffer filename)) | |
| 366 | error) | |
| 367 | (if buf | |
| 368 | (or nowarn | |
| 369 | (verify-visited-file-modtime buf) | |
| 370 | (cond ((not (file-exists-p filename)) | |
| 371 | (error "File %s no longer exists!" filename)) | |
| 372 | ((yes-or-no-p | |
| 373 | (format | |
| 374 | (if (buffer-modified-p buf) | |
| 375 | "File %s changed on disk. Discard your edits? " | |
| 376 | "File %s changed on disk. Read the new version? ") | |
| 377 | (file-name-nondirectory filename))) | |
| 378 | (save-excursion | |
| 379 | (set-buffer buf) | |
| 380 | (revert-buffer t t))))) | |
| 381 | (save-excursion | |
| 382 | (let* ((link-name (car (file-attributes filename))) | |
| 383 | (linked-buf (and (stringp link-name) | |
| 384 | (get-file-buffer link-name)))) | |
| 385 | (if (bufferp linked-buf) | |
| 386 | (message "Symbolic link to file in buffer %s" | |
| 387 | (buffer-name linked-buf)))) | |
| 388 | (setq buf (create-file-buffer filename)) | |
| 389 | (set-buffer buf) | |
| 390 | (erase-buffer) | |
| 391 | (condition-case () | |
| 392 | (insert-file-contents filename t) | |
| 393 | (file-error | |
| 394 | (setq error t) | |
| 395 | ;; Run find-file-not-found-hooks until one returns non-nil. | |
| 396 | (let ((hooks find-file-not-found-hooks)) | |
| 397 | (while (and hooks | |
| 398 | (not (funcall (car hooks)))) | |
| 399 | (setq hooks (cdr hooks)))))) | |
| 400 | ;; Set buffer's default directory to that of the file. | |
| 401 | (setq default-directory (file-name-directory filename)) | |
| 402 | ;; Turn off backup files for certain file names. Since | |
| 403 | ;; this is a permanent local, the major mode won't eliminate it. | |
| 404 | (and (not (funcall backup-enable-predicate buffer-file-name)) | |
| 405 | (progn | |
| 406 | (make-local-variable 'backup-inhibited) | |
| 407 | (setq backup-inhibited t))) | |
| 408 | (after-find-file error (not nowarn)))) | |
| 409 | buf))) | |
| 410 | \f | |
| 411 | (defun after-find-file (&optional error warn) | |
| 412 | "Called after finding a file and by the default revert function. | |
| 413 | Sets buffer mode, parses local variables. | |
| 414 | Optional args ERROR and WARN: ERROR non-nil means there was an | |
| 415 | error in reading the file. WARN non-nil means warn if there | |
| 416 | exists an auto-save file more recent than the visited file. | |
| 417 | Finishes by calling the functions in `find-file-hooks'." | |
| 418 | (setq buffer-read-only (not (file-writable-p buffer-file-name))) | |
| 419 | (if noninteractive | |
| 420 | nil | |
| 421 | (let* (not-serious | |
| 422 | (msg | |
| 423 | (cond ((and error (file-attributes buffer-file-name)) | |
| 424 | (setq buffer-read-only t) | |
| 425 | "File exists, but is read-protected.") | |
| 426 | ((not buffer-read-only) | |
| 427 | (if (and warn | |
| 428 | (file-newer-than-file-p (make-auto-save-file-name) | |
| 429 | buffer-file-name)) | |
| 430 | "Auto save file is newer; consider M-x recover-file" | |
| 431 | (setq not-serious t) | |
| 432 | (if error "(New file)" nil))) | |
| 433 | ((not error) | |
| 434 | (setq not-serious t) | |
| 435 | "Note: file is write protected") | |
| 436 | ((file-attributes (directory-file-name default-directory)) | |
| 437 | "File not found and directory write-protected") | |
| 438 | (t | |
| 5bbbceb1 JB |
439 | ;; If the directory the buffer is in doesn't exist, |
| 440 | ;; offer to create it. It's better to do this now | |
| 441 | ;; than when we save the buffer, because we want | |
| 442 | ;; autosaving to work. | |
| 443 | (setq buffer-read-only nil) | |
| 444 | (or (file-exists-p (file-name-directory buffer-file-name)) | |
| 445 | (if (yes-or-no-p | |
| 446 | (format | |
| 447 | "The directory containing %s does not exist. Create? " | |
| 448 | (abbreviate-file-name buffer-file-name))) | |
| 449 | (make-directory-path | |
| 450 | (file-name-directory buffer-file-name)))) | |
| 451 | nil)))) | |
| b4da00e9 RM |
452 | (if msg |
| 453 | (progn | |
| 454 | (message msg) | |
| 455 | (or not-serious (sit-for 1 nil t))))) | |
| 456 | (if auto-save-default | |
| 457 | (auto-save-mode t))) | |
| 458 | (normal-mode t) | |
| 459 | (mapcar 'funcall find-file-hooks)) | |
| 460 | ||
| 461 | (defun normal-mode (&optional find-file) | |
| 462 | "Choose the major mode for this buffer automatically. | |
| 463 | Also sets up any specified local variables of the file. | |
| 464 | Uses the visited file name, the -*- line, and the local variables spec. | |
| 465 | ||
| 466 | This function is called automatically from `find-file'. In that case, | |
| 467 | we may set up specified local variables depending on the value of | |
| 468 | `enable-local-variables': if it is t, we do; if it is nil, we don't; | |
| 469 | otherwise, we query. `enable-local-variables' is ignored if you | |
| 470 | run `normal-mode' explicitly." | |
| 471 | (interactive) | |
| 472 | (or find-file (funcall (or default-major-mode 'fundamental-mode))) | |
| 473 | (condition-case err | |
| 474 | (set-auto-mode) | |
| 475 | (error (message "File mode specification error: %s" | |
| 476 | (prin1-to-string err)))) | |
| 477 | (condition-case err | |
| 7b3f3dc2 JB |
478 | (let ((enable-local-variables (or (not find-file) |
| 479 | enable-local-variables))) | |
| 480 | (hack-local-variables)) | |
| b4da00e9 RM |
481 | (error (message "File local-variables error: %s" |
| 482 | (prin1-to-string err))))) | |
| 483 | ||
| 7b3f3dc2 JB |
484 | (defvar auto-mode-alist (mapcar 'purecopy |
| 485 | '(("\\.text\\'" . text-mode) | |
| 486 | ("\\.c\\'" . c-mode) | |
| 487 | ("\\.h\\'" . c-mode) | |
| 488 | ("\\.tex\\'" . TeX-mode) | |
| 489 | ("\\.ltx\\'" . LaTeX-mode) | |
| 490 | ("\\.el\\'" . emacs-lisp-mode) | |
| 491 | ("\\.mm\\'" . nroff-mode) | |
| 492 | ("\\.me\\'" . nroff-mode) | |
| 493 | ("\\.[12345678]\\'" . nroff-mode) | |
| 494 | ("\\.scm\\'" . scheme-mode) | |
| 495 | ("\\.l\\'" . lisp-mode) | |
| 496 | ("\\.lisp\\'" . lisp-mode) | |
| 497 | ("\\.f\\'" . fortran-mode) | |
| 498 | ("\\.for\\'" . fortran-mode) | |
| 499 | ("\\.mss\\'" . scribe-mode) | |
| 500 | ("\\.pl\\'" . prolog-mode) | |
| 501 | ("\\.cc\\'" . c++-mode) | |
| 502 | ("\\.C\\'" . c++-mode) | |
| 503 | ;;; Less common extensions come here | |
| 504 | ;;; so more common ones above are found faster. | |
| 505 | ("\\.s\\'" . asm-mode) | |
| 506 | ("ChangeLog\\'" . change-log-mode) | |
| 507 | ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode) | |
| 508 | ("\\.TeX\\'" . TeX-mode) | |
| 509 | ("\\.sty\\'" . LaTeX-mode) | |
| 510 | ("\\.bbl\\'" . LaTeX-mode) | |
| 511 | ("\\.bib\\'" . bibtex-mode) | |
| 512 | ("\\.article\\'" . text-mode) | |
| 513 | ("\\.letter\\'" . text-mode) | |
| 514 | ("\\.texinfo\\'" . texinfo-mode) | |
| fd5285f3 | 515 | ("\\.texi\\'" . texinfo-mode) |
| 7b3f3dc2 JB |
516 | ("\\.lsp\\'" . lisp-mode) |
| 517 | ("\\.awk\\'" . awk-mode) | |
| 518 | ("\\.prolog\\'" . prolog-mode) | |
| 519 | ;; Mailer puts message to be edited in | |
| 520 | ;; /tmp/Re.... or Message | |
| 521 | ("^/tmp/Re" . text-mode) | |
| 522 | ("/Message[0-9]*\\'" . text-mode) | |
| 523 | ;; some news reader is reported to use this | |
| 524 | ("^/tmp/fol/" . text-mode) | |
| 525 | ("\\.y\\'" . c-mode) | |
| 526 | ("\\.oak\\'" . scheme-mode) | |
| 527 | ("\\.scm.[0-9]*\\'" . scheme-mode) | |
| 528 | ;; .emacs following a directory delimiter | |
| 529 | ;; in either Unix or VMS syntax. | |
| 530 | ("[]>:/]\\..*emacs\\'" . emacs-lisp-mode) | |
| 531 | ("\\.ml\\'" . lisp-mode))) | |
| 532 | "\ | |
| 533 | Alist of filename patterns vs corresponding major mode functions. | |
| 534 | Each element looks like (REGEXP . FUNCTION). | |
| 535 | Visiting a file whose name matches REGEXP causes FUNCTION to be called.") | |
| 536 | ||
| b4da00e9 RM |
537 | (defun set-auto-mode () |
| 538 | "Select major mode appropriate for current buffer. | |
| 7b3f3dc2 JB |
539 | This checks for a -*- mode tag in the buffer's text, or |
| 540 | compares the filename against the entries in auto-mode-alist. It does | |
| 541 | not check for the \"mode:\" local variable in the Local Variables | |
| 542 | section of the file; for that, use `hack-local-variables'. | |
| 543 | ||
| 544 | If enable-local-variables is nil, this function will not check for a | |
| 545 | -*- mode tag." | |
| b4da00e9 RM |
546 | ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- |
| 547 | (let (beg end mode) | |
| 548 | (save-excursion | |
| 549 | (goto-char (point-min)) | |
| 550 | (skip-chars-forward " \t\n") | |
| 7b3f3dc2 JB |
551 | (if (and enable-local-variables |
| 552 | (search-forward "-*-" (save-excursion (end-of-line) (point)) t) | |
| b4da00e9 RM |
553 | (progn |
| 554 | (skip-chars-forward " \t") | |
| 555 | (setq beg (point)) | |
| 7b3f3dc2 JB |
556 | (search-forward "-*-" |
| 557 | (save-excursion (end-of-line) (point)) | |
| 558 | t)) | |
| b4da00e9 RM |
559 | (progn |
| 560 | (forward-char -3) | |
| 561 | (skip-chars-backward " \t") | |
| 562 | (setq end (point)) | |
| 563 | (goto-char beg) | |
| 564 | (if (search-forward ":" end t) | |
| 565 | (progn | |
| 566 | (goto-char beg) | |
| 567 | (if (let ((case-fold-search t)) | |
| 568 | (search-forward "mode:" end t)) | |
| 569 | (progn | |
| 570 | (skip-chars-forward " \t") | |
| 571 | (setq beg (point)) | |
| 572 | (if (search-forward ";" end t) | |
| 573 | (forward-char -1) | |
| 574 | (goto-char end)) | |
| 575 | (skip-chars-backward " \t") | |
| 576 | (setq mode (buffer-substring beg (point)))))) | |
| 577 | (setq mode (buffer-substring beg end))))) | |
| 578 | (setq mode (intern (concat (downcase mode) "-mode"))) | |
| 579 | (let ((alist auto-mode-alist) | |
| 580 | (name buffer-file-name)) | |
| 581 | (let ((case-fold-search (eq system-type 'vax-vms))) | |
| 582 | ;; Remove backup-suffixes from file name. | |
| 583 | (setq name (file-name-sans-versions name)) | |
| 584 | ;; Find first matching alist entry. | |
| 585 | (while (and (not mode) alist) | |
| 586 | (if (string-match (car (car alist)) name) | |
| 587 | (setq mode (cdr (car alist)))) | |
| 588 | (setq alist (cdr alist))))))) | |
| 589 | (if mode (funcall mode)))) | |
| 590 | ||
| 7b3f3dc2 | 591 | (defun hack-local-variables () |
| b4da00e9 RM |
592 | "Parse (and bind or evaluate as appropriate) any local variables |
| 593 | for current buffer." | |
| 594 | ;; Look for "Local variables:" line in last page. | |
| 595 | (save-excursion | |
| 596 | (goto-char (point-max)) | |
| 597 | (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) | |
| 598 | (if (let ((case-fold-search t)) | |
| 599 | (and (search-forward "Local Variables:" nil t) | |
| 7b3f3dc2 | 600 | (or (eq enable-local-variables t) |
| b4da00e9 RM |
601 | (and enable-local-variables |
| 602 | (save-window-excursion | |
| 603 | (switch-to-buffer (current-buffer)) | |
| 604 | (save-excursion | |
| 605 | (beginning-of-line) | |
| 606 | (set-window-start (selected-window) (point))) | |
| 607 | (y-or-n-p (format "Set local variables as specified at end of %s? " | |
| 608 | (file-name-nondirectory buffer-file-name)))))))) | |
| 609 | (let ((continue t) | |
| 610 | prefix prefixlen suffix beg) | |
| 611 | ;; The prefix is what comes before "local variables:" in its line. | |
| 612 | ;; The suffix is what comes after "local variables:" in its line. | |
| 613 | (skip-chars-forward " \t") | |
| 614 | (or (eolp) | |
| 615 | (setq suffix (buffer-substring (point) | |
| 616 | (progn (end-of-line) (point))))) | |
| 617 | (goto-char (match-beginning 0)) | |
| 618 | (or (bolp) | |
| 619 | (setq prefix | |
| 620 | (buffer-substring (point) | |
| 621 | (progn (beginning-of-line) (point))))) | |
| 7b3f3dc2 | 622 | |
| b4da00e9 RM |
623 | (if prefix (setq prefixlen (length prefix) |
| 624 | prefix (regexp-quote prefix))) | |
| 625 | (if suffix (setq suffix (concat (regexp-quote suffix) "$"))) | |
| 626 | (while continue | |
| 627 | ;; Look at next local variable spec. | |
| 628 | (if selective-display (re-search-forward "[\n\C-m]") | |
| 629 | (forward-line 1)) | |
| 630 | ;; Skip the prefix, if any. | |
| 631 | (if prefix | |
| 632 | (if (looking-at prefix) | |
| 633 | (forward-char prefixlen) | |
| 634 | (error "Local variables entry is missing the prefix"))) | |
| 635 | ;; Find the variable name; strip whitespace. | |
| 636 | (skip-chars-forward " \t") | |
| 637 | (setq beg (point)) | |
| 638 | (skip-chars-forward "^:\n") | |
| 639 | (if (eolp) (error "Missing colon in local variables entry")) | |
| 640 | (skip-chars-backward " \t") | |
| 641 | (let* ((str (buffer-substring beg (point))) | |
| 642 | (var (read str)) | |
| 643 | val) | |
| 644 | ;; Setting variable named "end" means end of list. | |
| 645 | (if (string-equal (downcase str) "end") | |
| 646 | (setq continue nil) | |
| 647 | ;; Otherwise read the variable value. | |
| 648 | (skip-chars-forward "^:") | |
| 649 | (forward-char 1) | |
| 650 | (setq val (read (current-buffer))) | |
| 651 | (skip-chars-backward "\n") | |
| 652 | (skip-chars-forward " \t") | |
| 653 | (or (if suffix (looking-at suffix) (eolp)) | |
| 654 | (error "Local variables entry is terminated incorrectly")) | |
| 655 | ;; Set the variable. "Variables" mode and eval are funny. | |
| 656 | (cond ((eq var 'mode) | |
| 657 | (funcall (intern (concat (downcase (symbol-name val)) | |
| 658 | "-mode")))) | |
| 659 | ((eq var 'eval) | |
| d207b766 RS |
660 | (if (and (not (string= (user-login-name) "root")) |
| 661 | (or (eq enable-local-eval t) | |
| 662 | (and enable-local-eval | |
| 663 | (save-window-excursion | |
| 664 | (switch-to-buffer (current-buffer)) | |
| 665 | (save-excursion | |
| 666 | (beginning-of-line) | |
| 667 | (set-window-start (selected-window) (point))) | |
| 668 | (y-or-n-p (format "Process `eval' local variable in file %s? " | |
| 669 | (file-name-nondirectory buffer-file-name))))))) | |
| 670 | (save-excursion (eval val)) | |
| 671 | (message "Ignoring `eval:' in file's local variables"))) | |
| b4da00e9 RM |
672 | (t (make-local-variable var) |
| 673 | (set var val)))))))))) | |
| 674 | \f | |
| 675 | (defun set-visited-file-name (filename) | |
| 676 | "Change name of file visited in current buffer to FILENAME. | |
| 677 | The next time the buffer is saved it will go in the newly specified file. | |
| 678 | nil or empty string as argument means make buffer not be visiting any file. | |
| 679 | Remember to delete the initial contents of the minibuffer | |
| 680 | if you wish to pass an empty string as the argument." | |
| 681 | (interactive "FSet visited file name: ") | |
| 682 | (if filename | |
| 683 | (setq filename | |
| 684 | (if (string-equal filename "") | |
| 685 | nil | |
| 686 | (expand-file-name filename)))) | |
| 687 | (or (equal filename buffer-file-name) | |
| 688 | (null filename) | |
| 689 | (progn | |
| 690 | (lock-buffer filename) | |
| 691 | (unlock-buffer))) | |
| 692 | (setq buffer-file-name filename) | |
| 693 | (if filename ; make buffer name reflect filename. | |
| 5bbbceb1 | 694 | (let ((new-name (file-name-nondirectory buffer-file-name))) |
| b4da00e9 RM |
695 | (if (string= new-name "") |
| 696 | (error "Empty file name")) | |
| 697 | (if (eq system-type 'vax-vms) | |
| 698 | (setq new-name (downcase new-name))) | |
| 699 | (setq default-directory (file-name-directory buffer-file-name)) | |
| 5bbbceb1 | 700 | (rename-buffer new-name t))) |
| b4da00e9 RM |
701 | (setq buffer-backed-up nil) |
| 702 | (clear-visited-file-modtime) | |
| 703 | ;; write-file-hooks is normally used for things like ftp-find-file | |
| 704 | ;; that visit things that are not local files as if they were files. | |
| 705 | ;; Changing to visit an ordinary local file instead should flush the hook. | |
| 706 | (kill-local-variable 'write-file-hooks) | |
| 707 | (kill-local-variable 'revert-buffer-function) | |
| 708 | (kill-local-variable 'backup-inhibited) | |
| 709 | ;; Turn off backup files for certain file names. | |
| 710 | ;; Since this is a permanent local, the major mode won't eliminate it. | |
| 711 | (and (not (funcall backup-enable-predicate buffer-file-name)) | |
| 712 | (progn | |
| 713 | (make-local-variable 'backup-inhibited) | |
| 714 | (setq backup-inhibited t))) | |
| 715 | ;; If auto-save was not already on, turn it on if appropriate. | |
| 716 | (if (not buffer-auto-save-file-name) | |
| 717 | (auto-save-mode (and buffer-file-name auto-save-default))) | |
| 718 | (if buffer-file-name | |
| 719 | (set-buffer-modified-p t))) | |
| 720 | ||
| 721 | (defun write-file (filename) | |
| 722 | "Write current buffer into file FILENAME. | |
| 723 | Makes buffer visit that file, and marks it not modified." | |
| 724 | ;; (interactive "FWrite file: ") | |
| 725 | (interactive | |
| 726 | (list (if buffer-file-name | |
| 727 | (read-file-name "Write file: " | |
| 728 | nil nil nil nil) | |
| 729 | (read-file-name "Write file: " | |
| 730 | (cdr (assq 'default-directory | |
| 731 | (buffer-local-variables))) | |
| 732 | nil nil (buffer-name))))) | |
| 733 | (or (null filename) (string-equal filename "") | |
| 734 | (set-visited-file-name filename)) | |
| 735 | (set-buffer-modified-p t) | |
| 736 | (save-buffer)) | |
| 737 | \f | |
| 738 | (defun backup-buffer () | |
| 739 | "Make a backup of the disk file visited by the current buffer, if appropriate. | |
| 740 | This is normally done before saving the buffer the first time. | |
| 741 | If the value is non-nil, it is the result of `file-modes' on the original | |
| 742 | file; this means that the caller, after saving the buffer, should change | |
| 743 | the modes of the new file to agree with the old modes." | |
| 744 | (if (and make-backup-files (not backup-inhibited) | |
| 745 | (not buffer-backed-up) | |
| 746 | (file-exists-p buffer-file-name) | |
| 747 | (memq (aref (elt (file-attributes buffer-file-name) 8) 0) | |
| 748 | '(?- ?l))) | |
| 749 | (let ((real-file-name buffer-file-name) | |
| 750 | backup-info backupname targets setmodes) | |
| 751 | ;; If specified name is a symbolic link, chase it to the target. | |
| 752 | ;; Thus we make the backups in the directory where the real file is. | |
| 753 | (while (let ((tem (file-symlink-p real-file-name))) | |
| 754 | (if tem | |
| 755 | (setq real-file-name | |
| 756 | (expand-file-name tem | |
| 757 | (file-name-directory real-file-name)))) | |
| 758 | tem)) | |
| 759 | (setq backup-info (find-backup-file-name real-file-name) | |
| 760 | backupname (car backup-info) | |
| 761 | targets (cdr backup-info)) | |
| 762 | ;;; (if (file-directory-p buffer-file-name) | |
| 763 | ;;; (error "Cannot save buffer in directory %s" buffer-file-name)) | |
| 764 | (condition-case () | |
| 765 | (let ((delete-old-versions | |
| 766 | ;; If have old versions to maybe delete, | |
| 767 | ;; ask the user to confirm now, before doing anything. | |
| 768 | ;; But don't actually delete til later. | |
| 769 | (and targets | |
| 6d74b528 | 770 | (or (eq trim-versions-without-asking t) (eq trim-versions-without-asking nil)) |
| b4da00e9 RM |
771 | (or trim-versions-without-asking |
| 772 | (y-or-n-p (format "Delete excess backup versions of %s? " | |
| 773 | real-file-name)))))) | |
| 774 | ;; Actually write the back up file. | |
| 775 | (condition-case () | |
| 776 | (if (or file-precious-flag | |
| 777 | ; (file-symlink-p buffer-file-name) | |
| 778 | backup-by-copying | |
| 779 | (and backup-by-copying-when-linked | |
| 780 | (> (file-nlinks real-file-name) 1)) | |
| 781 | (and backup-by-copying-when-mismatch | |
| 782 | (let ((attr (file-attributes real-file-name))) | |
| 783 | (or (nth 9 attr) | |
| 784 | (/= (nth 2 attr) (user-uid)))))) | |
| 785 | (copy-file real-file-name backupname t t) | |
| 786 | ; rename-file should delete old backup. | |
| 787 | ; (condition-case () | |
| 788 | ; (delete-file backupname) | |
| 789 | ; (file-error nil)) | |
| 790 | (rename-file real-file-name backupname t) | |
| 791 | (setq setmodes (file-modes backupname))) | |
| 792 | (file-error | |
| 793 | ;; If trouble writing the backup, write it in ~. | |
| 794 | (setq backupname (expand-file-name "~/%backup%~")) | |
| 795 | (message "Cannot write backup file; backing up in ~/%%backup%%~") | |
| 796 | (sleep-for 1) | |
| 797 | (copy-file real-file-name backupname t t))) | |
| 798 | (setq buffer-backed-up t) | |
| 799 | ;; Now delete the old versions, if desired. | |
| 800 | (if delete-old-versions | |
| 801 | (while targets | |
| 802 | (condition-case () | |
| 803 | (delete-file (car targets)) | |
| 804 | (file-error nil)) | |
| 805 | (setq targets (cdr targets)))) | |
| 806 | setmodes) | |
| 807 | (file-error nil))))) | |
| 808 | ||
| 809 | (defun file-name-sans-versions (name) | |
| 810 | "Return FILENAME sans backup versions or strings. | |
| 811 | This is a separate procedure so your site-init or startup file can | |
| 812 | redefine it." | |
| 813 | (substring name 0 | |
| 814 | (if (eq system-type 'vax-vms) | |
| 815 | ;; VMS version number is (a) semicolon, optional | |
| 816 | ;; sign, zero or more digits or (b) period, option | |
| 817 | ;; sign, zero or more digits, provided this is the | |
| 818 | ;; second period encountered outside of the | |
| 819 | ;; device/directory part of the file name. | |
| 820 | (or (string-match ";[---+]?[0-9]*\\'" name) | |
| 821 | (if (string-match "\\.[^]>:]*\\(\\.[---+]?[0-9]*\\)\\'" | |
| 822 | name) | |
| 823 | (match-beginning 1)) | |
| 824 | (length name)) | |
| 825 | (or (string-match "\\.~[0-9]+~\\'" name) | |
| 826 | (string-match "~\\'" name) | |
| 827 | (length name))))) | |
| 828 | ||
| 829 | (defun make-backup-file-name (file) | |
| 830 | "Create the non-numeric backup file name for FILE. | |
| 831 | This is a separate function so you can redefine it for customization." | |
| 832 | (concat file "~")) | |
| 833 | ||
| 834 | (defun backup-file-name-p (file) | |
| 835 | "Return non-nil if FILE is a backup file name (numeric or not). | |
| 836 | This is a separate function so you can redefine it for customization. | |
| 837 | You may need to redefine `file-name-sans-versions' as well." | |
| 838 | (string-match "~$" file)) | |
| 839 | ||
| 840 | ;; I believe there is no need to alter this behavior for VMS; | |
| 841 | ;; since backup files are not made on VMS, it should not get called. | |
| 842 | (defun find-backup-file-name (fn) | |
| 843 | "Find a file name for a backup file, and suggestions for deletions. | |
| 844 | Value is a list whose car is the name for the backup file | |
| 845 | and whose cdr is a list of old versions to consider deleting now." | |
| 846 | (if (eq version-control 'never) | |
| 847 | (list (make-backup-file-name fn)) | |
| 848 | (let* ((base-versions (concat (file-name-nondirectory fn) ".~")) | |
| 849 | (bv-length (length base-versions)) | |
| 850 | (possibilities (file-name-all-completions | |
| 851 | base-versions | |
| 852 | (file-name-directory fn))) | |
| 79058860 JB |
853 | (versions (sort (mapcar |
| 854 | (function | |
| 855 | (lambda (fn) | |
| 856 | (if (and (string-match "[0-9]+~$" fn bv-length) | |
| 857 | (= (match-beginning 0) bv-length)) | |
| 858 | (string-to-int (substring fn bv-length -1)) | |
| 859 | 0))) | |
| 860 | possibilities) | |
| b4da00e9 | 861 | '<)) |
| 5bbbceb1 | 862 | (high-water-mark (apply 'max 0 versions)) |
| b4da00e9 RM |
863 | (deserve-versions-p |
| 864 | (or version-control | |
| 865 | (> high-water-mark 0))) | |
| 866 | (number-to-delete (- (length versions) | |
| 867 | kept-old-versions kept-new-versions -1))) | |
| 868 | (if (not deserve-versions-p) | |
| 869 | (list (make-backup-file-name fn)) | |
| 870 | (cons (concat fn ".~" (int-to-string (1+ high-water-mark)) "~") | |
| 871 | (if (> number-to-delete 0) | |
| 872 | (mapcar (function (lambda (n) | |
| 873 | (concat fn ".~" (int-to-string n) "~"))) | |
| 874 | (let ((v (nthcdr kept-old-versions versions))) | |
| 875 | (rplacd (nthcdr (1- number-to-delete) v) ()) | |
| 876 | v)))))))) | |
| 877 | ||
| b4da00e9 RM |
878 | (defun file-nlinks (filename) |
| 879 | "Return number of names file FILENAME has." | |
| 880 | (car (cdr (file-attributes filename)))) | |
| 881 | \f | |
| 882 | (defun save-buffer (&optional args) | |
| 883 | "Save current buffer in visited file if modified. Versions described below. | |
| 884 | By default, makes the previous version into a backup file | |
| 885 | if previously requested or if this is the first save. | |
| 886 | With 1 or 3 \\[universal-argument]'s, marks this version | |
| 887 | to become a backup when the next save is done. | |
| 888 | With 2 or 3 \\[universal-argument]'s, | |
| 889 | unconditionally makes the previous version into a backup file. | |
| 890 | With argument of 0, never makes the previous version into a backup file. | |
| 891 | ||
| 892 | If a file's name is FOO, the names of its numbered backup versions are | |
| 893 | FOO.~i~ for various integers i. A non-numbered backup file is called FOO~. | |
| 894 | Numeric backups (rather than FOO~) will be made if value of | |
| 895 | `version-control' is not the atom `never' and either there are already | |
| 896 | numeric versions of the file being backed up, or `version-control' is | |
| 897 | non-nil. | |
| 898 | We don't want excessive versions piling up, so there are variables | |
| 899 | `kept-old-versions', which tells Emacs how many oldest versions to keep, | |
| 900 | and `kept-new-versions', which tells how many newest versions to keep. | |
| 901 | Defaults are 2 old versions and 2 new. | |
| 902 | `dired-kept-versions' controls dired's clean-directory (.) command. | |
| 903 | If `trim-versions-without-asking' is nil, system will query user | |
| 904 | before trimming versions. Otherwise it does it silently." | |
| 905 | (interactive "p") | |
| 906 | (let ((modp (buffer-modified-p)) | |
| 907 | (large (> (buffer-size) 50000)) | |
| 908 | (make-backup-files (and make-backup-files (not (eq args 0))))) | |
| 909 | (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) | |
| 910 | (if (and modp large) (message "Saving file %s..." (buffer-file-name))) | |
| 911 | (basic-save-buffer) | |
| 912 | (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) | |
| 913 | ||
| 914 | (defun delete-auto-save-file-if-necessary (&optional force) | |
| 915 | "Delete auto-save file for current buffer if `delete-auto-save-files' is t. | |
| 916 | Normally delete only if the file was written by this Emacs since | |
| 917 | the last real save, but optional arg FORCE non-nil means delete anyway." | |
| 918 | (and buffer-auto-save-file-name delete-auto-save-files | |
| 919 | (not (string= buffer-file-name buffer-auto-save-file-name)) | |
| 920 | (or force (recent-auto-save-p)) | |
| 921 | (progn | |
| 922 | (condition-case () | |
| 923 | (delete-file buffer-auto-save-file-name) | |
| 924 | (file-error nil)) | |
| 925 | (set-buffer-auto-saved)))) | |
| 926 | ||
| 927 | (defun basic-save-buffer () | |
| 928 | "Save the current buffer in its visited file, if it has been modified." | |
| 929 | (interactive) | |
| 930 | (if (buffer-modified-p) | |
| 931 | (let ((recent-save (recent-auto-save-p)) | |
| 932 | setmodes tempsetmodes) | |
| 933 | ;; On VMS, rename file and buffer to get rid of version number. | |
| 934 | (if (and (eq system-type 'vax-vms) | |
| 935 | (not (string= buffer-file-name | |
| 936 | (file-name-sans-versions buffer-file-name)))) | |
| 937 | (let (buffer-new-name) | |
| 938 | ;; Strip VMS version number before save. | |
| 939 | (setq buffer-file-name | |
| 940 | (file-name-sans-versions buffer-file-name)) | |
| 941 | ;; Construct a (unique) buffer name to correspond. | |
| 942 | (let ((buf (create-file-buffer (downcase buffer-file-name)))) | |
| 943 | (setq buffer-new-name (buffer-name buf)) | |
| 944 | (kill-buffer buf)) | |
| 945 | (rename-buffer buffer-new-name))) | |
| 946 | ;; If buffer has no file name, ask user for one. | |
| 947 | (or buffer-file-name | |
| 948 | (progn | |
| 949 | (setq buffer-file-name | |
| 950 | (expand-file-name (read-file-name "File to save in: ") nil) | |
| 951 | default-directory (file-name-directory buffer-file-name)) | |
| 952 | (auto-save-mode auto-save-default))) | |
| 953 | (or (verify-visited-file-modtime (current-buffer)) | |
| 954 | (not (file-exists-p buffer-file-name)) | |
| 955 | (yes-or-no-p | |
| 956 | (format "%s has changed since visited or saved. Save anyway? " | |
| 957 | (file-name-nondirectory buffer-file-name))) | |
| 958 | (error "Save not confirmed")) | |
| 959 | (save-restriction | |
| 960 | (widen) | |
| 961 | (and (> (point-max) 1) | |
| 962 | (/= (char-after (1- (point-max))) ?\n) | |
| 963 | (or (eq require-final-newline t) | |
| 964 | (and require-final-newline | |
| 965 | (y-or-n-p | |
| 966 | (format "Buffer %s does not end in newline. Add one? " | |
| 967 | (buffer-name))))) | |
| 968 | (save-excursion | |
| 969 | (goto-char (point-max)) | |
| 970 | (insert ?\n))) | |
| 8c0e7b73 | 971 | (let ((hooks (append write-contents-hooks write-file-hooks)) |
| b4da00e9 RM |
972 | (done nil)) |
| 973 | (while (and hooks | |
| 974 | (not (setq done (funcall (car hooks))))) | |
| 975 | (setq hooks (cdr hooks))) | |
| 976 | ;; If a hook returned t, file is already "written". | |
| 977 | (cond ((not done) | |
| 978 | (if (not (file-writable-p buffer-file-name)) | |
| 979 | (let ((dir (file-name-directory buffer-file-name))) | |
| 980 | (if (not (file-directory-p dir)) | |
| 981 | (error "%s is not a directory" dir) | |
| 982 | (if (not (file-exists-p buffer-file-name)) | |
| 983 | (error "Directory %s write-protected" dir) | |
| 984 | (if (yes-or-no-p | |
| 985 | (format "File %s is write-protected; try to save anyway? " | |
| 986 | (file-name-nondirectory | |
| 987 | buffer-file-name))) | |
| 988 | (setq tempsetmodes t) | |
| 989 | (error "Attempt to save to a file which you aren't allowed to write")))))) | |
| 990 | (or buffer-backed-up | |
| 991 | (setq setmodes (backup-buffer))) | |
| 992 | (if file-precious-flag | |
| 993 | ;; If file is precious, rename it away before | |
| 994 | ;; overwriting it. | |
| 995 | (let ((rename t) | |
| 996 | realname tempname temp) | |
| 997 | ;; Chase symlinks; rename the ultimate actual file. | |
| 998 | (setq realname buffer-file-name) | |
| 999 | (while (setq temp (file-symlink-p realname)) | |
| 1000 | (setq realname temp)) | |
| 1001 | (setq tempname (concat realname "#")) | |
| 1002 | (condition-case () | |
| 1003 | (progn (rename-file realname tempname t) | |
| 1004 | (setq setmodes (file-modes tempname))) | |
| 1005 | (file-error (setq rename nil tempname nil))) | |
| 1006 | (if (file-directory-p realname) | |
| 1007 | (error "%s is a directory" realname)) | |
| 1008 | (unwind-protect | |
| 1009 | (progn (clear-visited-file-modtime) | |
| 1010 | (write-region (point-min) (point-max) | |
| 1011 | realname nil t) | |
| 1012 | (setq rename nil)) | |
| 1013 | ;; If rename is still t, writing failed. | |
| 1014 | ;; So rename the old file back to original name, | |
| 1015 | (if rename | |
| 1016 | (progn | |
| 1017 | (rename-file tempname realname t) | |
| 1018 | (clear-visited-file-modtime)) | |
| 1019 | ;; Otherwise we don't need the original file, | |
| 1020 | ;; so flush it, if we still have it. | |
| 1021 | ;; If rename failed due to name length restriction | |
| 1022 | ;; then TEMPNAME is now nil. | |
| 1023 | (if tempname | |
| 1024 | (condition-case () | |
| 1025 | (delete-file tempname) | |
| 1026 | (error nil)))))) | |
| 1027 | ;; If file not writable, see if we can make it writable | |
| 1028 | ;; temporarily while we write it. | |
| 1029 | ;; But no need to do so if we have just backed it up | |
| 1030 | ;; (setmodes is set) because that says we're superseding. | |
| 1031 | (cond ((and tempsetmodes (not setmodes)) | |
| 1032 | ;; Change the mode back, after writing. | |
| 1033 | (setq setmodes (file-modes buffer-file-name)) | |
| 1034 | (set-file-modes buffer-file-name 511))) | |
| 1035 | (write-region (point-min) (point-max) | |
| 1036 | buffer-file-name nil t))))) | |
| 1037 | (if setmodes | |
| 1038 | (condition-case () | |
| 1039 | (set-file-modes buffer-file-name setmodes) | |
| 1040 | (error nil)))) | |
| 1041 | ;; If the auto-save file was recent before this command, | |
| 1042 | ;; delete it now. | |
| 1043 | (delete-auto-save-file-if-necessary recent-save) | |
| 1044 | (run-hooks 'after-save-hooks)) | |
| 1045 | (message "(No changes need to be saved)"))) | |
| 1046 | ||
| b4da00e9 RM |
1047 | (defun save-some-buffers (&optional arg exiting) |
| 1048 | "Save some modified file-visiting buffers. Asks user about each one. | |
| 5bbbceb1 JB |
1049 | Optional argument (the prefix) non-nil means save all with no questions. |
| 1050 | Optional second argument EXITING means ask about certain non-file buffers | |
| 1051 | as well as about file buffers." | |
| b4da00e9 | 1052 | (interactive "P") |
| b5e86cb3 RM |
1053 | (save-excursion |
| 1054 | (if (zerop (map-y-or-n-p | |
| 1055 | (function | |
| 1056 | (lambda (buffer) | |
| 1057 | (and (buffer-modified-p buffer) | |
| 1058 | (or | |
| 1059 | (buffer-file-name buffer) | |
| 1060 | (and exiting | |
| 1061 | (progn | |
| 1062 | (set-buffer buffer) | |
| 1063 | (and buffer-offer-save (> (buffer-size) 0))))) | |
| 1064 | (if arg | |
| 1065 | t | |
| 1066 | (if (buffer-file-name buffer) | |
| 1067 | (format "Save file %s? " | |
| 1068 | (buffer-file-name buffer)) | |
| 1069 | (format "Save buffer %s? " | |
| 1070 | (buffer-name buffer))))))) | |
| 1071 | (function | |
| 1072 | (lambda (buffer) | |
| e065a56e JB |
1073 | (set-buffer buffer) |
| 1074 | (save-buffer))) | |
| b5e86cb3 RM |
1075 | (buffer-list) |
| 1076 | '("buffer" "buffers" "save"))) | |
| 1077 | (message "(No files need saving)")))) | |
| b4da00e9 RM |
1078 | \f |
| 1079 | (defun not-modified (&optional arg) | |
| 1080 | "Mark current buffer as unmodified, not needing to be saved. | |
| 1081 | With prefix arg, mark buffer as modified, so \\[save-buffer] will save." | |
| 1082 | (interactive "P") | |
| 1083 | (message (if arg "Modification-flag set" | |
| 1084 | "Modification-flag cleared")) | |
| 1085 | (set-buffer-modified-p arg)) | |
| 1086 | ||
| 1087 | (defun toggle-read-only (&optional arg) | |
| 1088 | "Change whether this buffer is visiting its file read-only. | |
| 1089 | With arg, set read-only iff arg is positive." | |
| 1090 | (interactive "P") | |
| 1091 | (setq buffer-read-only | |
| 1092 | (if (null arg) | |
| 1093 | (not buffer-read-only) | |
| 1094 | (> (prefix-numeric-value arg) 0))) | |
| 1095 | ;; Force mode-line redisplay | |
| 1096 | (set-buffer-modified-p (buffer-modified-p))) | |
| 1097 | ||
| 1098 | (defun insert-file (filename) | |
| 1099 | "Insert contents of file FILENAME into buffer after point. | |
| 1100 | Set mark after the inserted text. | |
| 1101 | ||
| 1102 | This function is meant for the user to run interactively. | |
| 1103 | Don't call it from programs! Use `insert-file-contents' instead. | |
| 1104 | \(Its calling sequence is different; see its documentation)." | |
| 1105 | (interactive "fInsert file: ") | |
| 1106 | (let ((tem (insert-file-contents filename))) | |
| 1107 | (push-mark (+ (point) (car (cdr tem)))))) | |
| 1108 | ||
| 1109 | (defun append-to-file (start end filename) | |
| 1110 | "Append the contents of the region to the end of file FILENAME. | |
| 1111 | When called from a function, expects three arguments, | |
| 1112 | START, END and FILENAME. START and END are buffer positions | |
| 1113 | saying what text to write." | |
| 1114 | (interactive "r\nFAppend to file: ") | |
| 1115 | (write-region start end filename t)) | |
| 1116 | ||
| 1117 | (defun file-newest-backup (filename) | |
| 1118 | "Return most recent backup file for FILENAME or nil if no backups exist." | |
| 1119 | (let* ((filename (expand-file-name filename)) | |
| 1120 | (file (file-name-nondirectory filename)) | |
| 1121 | (dir (file-name-directory filename)) | |
| 1122 | (comp (file-name-all-completions file dir)) | |
| 1123 | newest) | |
| 1124 | (while comp | |
| 1125 | (setq file (concat dir (car comp)) | |
| 1126 | comp (cdr comp)) | |
| 1127 | (if (and (backup-file-name-p file) | |
| 1128 | (or (null newest) (file-newer-than-file-p file newest))) | |
| 1129 | (setq newest file))) | |
| 1130 | newest)) | |
| 1131 | ||
| 1132 | (defun rename-uniquely () | |
| 1133 | "Rename current buffer to a similar name not already taken. | |
| 1134 | This function is useful for creating multiple shell process buffers | |
| 1135 | or multiple mail buffers, etc." | |
| 1136 | (interactive) | |
| 1137 | (let* ((new-buf (generate-new-buffer (buffer-name))) | |
| 1138 | (name (buffer-name new-buf))) | |
| 1139 | (kill-buffer new-buf) | |
| 1140 | (rename-buffer name) | |
| 1141 | (set-buffer-modified-p (buffer-modified-p)))) ; force mode line update | |
| 5bbbceb1 JB |
1142 | |
| 1143 | (defun make-directory-path (path) | |
| 1144 | "Create all the directories along path that don't exist yet." | |
| 1145 | (interactive "Fdirectory path to create: ") | |
| 1146 | (let ((path (directory-file-name (expand-file-name path))) | |
| 1147 | create-list) | |
| 1148 | (while (not (file-exists-p path)) | |
| 1149 | (setq create-list (cons path create-list) | |
| 1150 | path (directory-file-name (file-name-directory path)))) | |
| 1151 | (while create-list | |
| 1152 | (make-directory (car create-list)) | |
| 1153 | (setq create-list (cdr create-list))))) | |
| 1154 | ||
| b4da00e9 RM |
1155 | \f |
| 1156 | (put 'revert-buffer-function 'permanent-local t) | |
| 1157 | (defvar revert-buffer-function nil | |
| 1158 | "Function to use to revert this buffer, or nil to do the default.") | |
| 1159 | ||
| 1160 | (put 'revert-buffer-insert-file-contents-function 'permanent-local t) | |
| 1161 | (defvar revert-buffer-insert-file-contents-function nil | |
| 1162 | "Function to use to insert contents when reverting this buffer. | |
| 1163 | Gets two args, first the nominal file name to use, | |
| 1164 | and second, t if reading the auto-save file.") | |
| 1165 | ||
| 8c0e7b73 | 1166 | (defun revert-buffer (&optional check-auto noconfirm) |
| b4da00e9 RM |
1167 | "Replace the buffer text with the text of the visited file on disk. |
| 1168 | This undoes all changes since the file was visited or saved. | |
| 8c0e7b73 JB |
1169 | With a prefix argument, offer to revert from latest auto-save file, if |
| 1170 | that is more recent than the visited file. | |
| 1171 | When called from lisp, this is the first argument, CHECK-AUTO; it is optional. | |
| b4da00e9 RM |
1172 | Optional second argument NOCONFIRM means don't ask for confirmation at all. |
| 1173 | ||
| 8c0e7b73 JB |
1174 | If the value of `revert-buffer-function' is non-nil, it is called to |
| 1175 | do the work." | |
| b4da00e9 RM |
1176 | (interactive "P") |
| 1177 | (if revert-buffer-function | |
| 8c0e7b73 | 1178 | (funcall revert-buffer-function (not check-auto) noconfirm) |
| b4da00e9 | 1179 | (let* ((opoint (point)) |
| 8c0e7b73 | 1180 | (auto-save-p (and check-auto (recent-auto-save-p) |
| b4da00e9 RM |
1181 | buffer-auto-save-file-name |
| 1182 | (file-readable-p buffer-auto-save-file-name) | |
| 1183 | (y-or-n-p | |
| 1184 | "Buffer has been auto-saved recently. Revert from auto-save file? "))) | |
| 1185 | (file-name (if auto-save-p | |
| 1186 | buffer-auto-save-file-name | |
| 1187 | buffer-file-name))) | |
| 1188 | (cond ((null file-name) | |
| 1189 | (error "Buffer does not seem to be associated with any file")) | |
| 1190 | ((or noconfirm | |
| 1191 | (yes-or-no-p (format "Revert buffer from file %s? " | |
| 1192 | file-name))) | |
| 1193 | ;; If file was backed up but has changed since, | |
| 1194 | ;; we shd make another backup. | |
| 1195 | (and (not auto-save-p) | |
| 5bbbceb1 | 1196 | (not (verify-visited-file-modtime (current-buffer))) |
| b4da00e9 RM |
1197 | (setq buffer-backed-up nil)) |
| 1198 | ;; Get rid of all undo records for this buffer. | |
| 1199 | (or (eq buffer-undo-list t) | |
| 1200 | (setq buffer-undo-list nil)) | |
| 1201 | (let ((buffer-read-only nil) | |
| 1202 | ;; Don't make undo records for the reversion. | |
| 1203 | (buffer-undo-list t)) | |
| 1204 | (if revert-buffer-insert-file-contents-function | |
| 1205 | (funcall revert-buffer-insert-file-contents-function | |
| 1206 | file-name auto-save-p) | |
| 1207 | (if (not (file-exists-p file-name)) | |
| 1208 | (error "File %s no longer exists!" file-name)) | |
| 1209 | ;; Bind buffer-file-name to nil | |
| 1210 | ;; so that we don't try to lock the file. | |
| 1211 | (let ((buffer-file-name nil)) | |
| 1212 | (or auto-save-p | |
| 1213 | (unlock-buffer)) | |
| 1214 | (erase-buffer)) | |
| 1215 | (insert-file-contents file-name (not auto-save-p)))) | |
| 1216 | (goto-char (min opoint (point-max))) | |
| 1217 | (after-find-file nil) | |
| 1218 | t))))) | |
| 1219 | ||
| 1220 | (defun recover-file (file) | |
| 1221 | "Visit file FILE, but get contents from its last auto-save file." | |
| 1222 | (interactive | |
| 1223 | (let ((prompt-file buffer-file-name) | |
| 1224 | (file-name nil) | |
| 1225 | (file-dir nil)) | |
| 1226 | (and prompt-file | |
| 1227 | (setq file-name (file-name-nondirectory prompt-file) | |
| 1228 | file-dir (file-name-directory prompt-file))) | |
| 1229 | (list (read-file-name "Recover file: " | |
| 1230 | file-dir nil nil file-name)))) | |
| 1231 | (setq file (expand-file-name file)) | |
| 1232 | (if (auto-save-file-name-p file) (error "%s is an auto-save file" file)) | |
| 1233 | (let ((file-name (let ((buffer-file-name file)) | |
| 1234 | (make-auto-save-file-name)))) | |
| 1235 | (cond ((not (file-newer-than-file-p file-name file)) | |
| 1236 | (error "Auto-save file %s not current" file-name)) | |
| 1237 | ((save-window-excursion | |
| 1238 | (if (not (eq system-type 'vax-vms)) | |
| 1239 | (with-output-to-temp-buffer "*Directory*" | |
| 1240 | (buffer-disable-undo standard-output) | |
| 1241 | (call-process "ls" nil standard-output nil | |
| 2dc2b736 RS |
1242 | (if (file-symlink-p file) "-lL" "-l") |
| 1243 | file file-name))) | |
| b4da00e9 RM |
1244 | (yes-or-no-p (format "Recover auto save file %s? " file-name))) |
| 1245 | (switch-to-buffer (find-file-noselect file t)) | |
| 1246 | (let ((buffer-read-only nil)) | |
| 1247 | (erase-buffer) | |
| 1248 | (insert-file-contents file-name nil)) | |
| 1249 | (after-find-file nil)) | |
| 1250 | (t (error "Recover-file cancelled."))))) | |
| 1251 | ||
| 1252 | (defun kill-some-buffers () | |
| 1253 | "For each buffer, ask whether to kill it." | |
| 1254 | (interactive) | |
| 1255 | (let ((list (buffer-list))) | |
| 1256 | (while list | |
| 1257 | (let* ((buffer (car list)) | |
| 1258 | (name (buffer-name buffer))) | |
| 1259 | (and (not (string-equal name "")) | |
| 1260 | (/= (aref name 0) ? ) | |
| 1261 | (yes-or-no-p | |
| 1262 | (format "Buffer %s %s. Kill? " | |
| 1263 | name | |
| 1264 | (if (buffer-modified-p buffer) | |
| 1265 | "HAS BEEN EDITED" "is unmodified"))) | |
| 1266 | (kill-buffer buffer))) | |
| 1267 | (setq list (cdr list))))) | |
| 1268 | \f | |
| 1269 | (defun auto-save-mode (arg) | |
| 1270 | "Toggle auto-saving of contents of current buffer. | |
| 1271 | With ARG, turn auto-saving on if positive, else off." | |
| 1272 | (interactive "P") | |
| 1273 | (setq buffer-auto-save-file-name | |
| 1274 | (and (if (null arg) | |
| 1275 | (not buffer-auto-save-file-name) | |
| 1276 | (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) | |
| 1277 | (if (and buffer-file-name auto-save-visited-file-name | |
| 1278 | (not buffer-read-only)) | |
| 1279 | buffer-file-name | |
| 1280 | (make-auto-save-file-name)))) | |
| 1281 | (if (interactive-p) | |
| 1282 | (message "Auto-save %s (in this buffer)" | |
| 1283 | (if buffer-auto-save-file-name "on" "off"))) | |
| 1284 | buffer-auto-save-file-name) | |
| 1285 | ||
| 1286 | (defun rename-auto-save-file () | |
| 1287 | "Adjust current buffer's auto save file name for current conditions. | |
| 1288 | Also rename any existing auto save file, if it was made in this session." | |
| 1289 | (let ((osave buffer-auto-save-file-name)) | |
| 1290 | (setq buffer-auto-save-file-name | |
| 1291 | (make-auto-save-file-name)) | |
| 1292 | (if (and osave buffer-auto-save-file-name | |
| 1293 | (not (string= buffer-auto-save-file-name buffer-file-name)) | |
| 1294 | (not (string= buffer-auto-save-file-name osave)) | |
| 1295 | (file-exists-p osave) | |
| 1296 | (recent-auto-save-p)) | |
| 1297 | (rename-file osave buffer-auto-save-file-name t)))) | |
| 1298 | ||
| 1299 | (defun make-auto-save-file-name () | |
| 1300 | "Return file name to use for auto-saves of current buffer. | |
| 1301 | Does not consider `auto-save-visited-file-name' as that variable is checked | |
| 1302 | before calling this function. You can redefine this for customization. | |
| 1303 | See also `auto-save-file-name-p'." | |
| 1304 | (if buffer-file-name | |
| 1305 | (concat (file-name-directory buffer-file-name) | |
| 1306 | "#" | |
| 1307 | (file-name-nondirectory buffer-file-name) | |
| 1308 | "#") | |
| 1309 | ;; For non-file bfr, use bfr name and Emacs pid. | |
| 1310 | (expand-file-name (format "#%s#%s#" (buffer-name) (make-temp-name ""))))) | |
| 1311 | ||
| 1312 | (defun auto-save-file-name-p (filename) | |
| 1313 | "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'. | |
| 1314 | FILENAME should lack slashes. You can redefine this for customization." | |
| 1315 | (string-match "^#.*#$" filename)) | |
| 1316 | \f | |
| 1317 | (defconst list-directory-brief-switches | |
| 1318 | (if (eq system-type 'vax-vms) "" "-CF") | |
| 1319 | "*Switches for list-directory to pass to `ls' for brief listing,") | |
| 1320 | ||
| 1321 | (defconst list-directory-verbose-switches | |
| 1322 | (if (eq system-type 'vax-vms) | |
| 1323 | "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)" | |
| 1324 | "-l") | |
| 1325 | "*Switches for list-directory to pass to `ls' for verbose listing,") | |
| 1326 | ||
| 1327 | (defun list-directory (dirname &optional verbose) | |
| 1328 | "Display a list of files in or matching DIRNAME, a la `ls'. | |
| 1329 | DIRNAME is globbed by the shell if necessary. | |
| 1330 | Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. | |
| 1331 | Actions controlled by variables `list-directory-brief-switches' | |
| 1332 | and `list-directory-verbose-switches'." | |
| 1333 | (interactive (let ((pfx current-prefix-arg)) | |
| 1334 | (list (read-file-name (if pfx "List directory (verbose): " | |
| 1335 | "List directory (brief): ") | |
| 1336 | nil default-directory nil) | |
| 1337 | pfx))) | |
| 1338 | (let ((switches (if verbose list-directory-verbose-switches | |
| 1339 | list-directory-brief-switches))) | |
| 1340 | (or dirname (setq dirname default-directory)) | |
| 1341 | (setq dirname (expand-file-name dirname)) | |
| 1342 | (with-output-to-temp-buffer "*Directory*" | |
| 1343 | (buffer-disable-undo standard-output) | |
| 1344 | (princ "Directory ") | |
| 1345 | (princ dirname) | |
| 1346 | (terpri) | |
| 1347 | (if (eq system-type 'vax-vms) | |
| 1348 | (vms-read-directory dirname switches standard-output) | |
| 1349 | (if (file-directory-p dirname) | |
| 1350 | (save-excursion | |
| 1351 | (set-buffer "*Directory*") | |
| 1352 | (call-process "ls" nil standard-output nil switches | |
| 1353 | (setq default-directory | |
| 1354 | (file-name-as-directory dirname)))) | |
| 1355 | (let ((default-directory (file-name-directory dirname))) | |
| 1356 | (if (file-exists-p default-directory) | |
| 1357 | (call-process shell-file-name nil standard-output nil | |
| 1358 | "-c" (concat "exec ls " | |
| 1359 | switches " " | |
| 1360 | (file-name-nondirectory dirname))) | |
| 1361 | (princ "No such directory: ") | |
| 1362 | (princ dirname) | |
| 1363 | (terpri)))))))) | |
| 1364 | ||
| 1365 | (defun save-buffers-kill-emacs (&optional arg) | |
| 1366 | "Offer to save each buffer, then kill this Emacs process. | |
| 1367 | With prefix arg, silently save all file-visiting buffers, then kill." | |
| 1368 | (interactive "P") | |
| 1369 | (save-some-buffers arg t) | |
| 1370 | (and (or (not (memq t (mapcar (function | |
| 1371 | (lambda (buf) (and (buffer-file-name buf) | |
| 1372 | (buffer-modified-p buf)))) | |
| 1373 | (buffer-list)))) | |
| 1374 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) | |
| 1375 | (or (not (fboundp 'process-list)) | |
| 1376 | ;; process-list is not defined on VMS. | |
| 1377 | (let ((processes (process-list)) | |
| 1378 | active) | |
| 1379 | (while processes | |
| 528415e7 | 1380 | (and (memq (process-status (car processes)) '(run stop open)) |
| b4da00e9 RM |
1381 | (let ((val (process-kill-without-query (car processes)))) |
| 1382 | (process-kill-without-query (car processes) val) | |
| 1383 | val) | |
| 1384 | (setq active t)) | |
| 1385 | (setq processes (cdr processes))) | |
| 1386 | (or (not active) | |
| 1387 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) | |
| 1388 | (kill-emacs))) | |
| 1389 | \f | |
| 1390 | (define-key ctl-x-map "\C-f" 'find-file) | |
| 1391 | (define-key ctl-x-map "\C-q" 'toggle-read-only) | |
| 1392 | (define-key ctl-x-map "\C-r" 'find-file-read-only) | |
| 1393 | (define-key ctl-x-map "\C-v" 'find-alternate-file) | |
| 1394 | (define-key ctl-x-map "\C-s" 'save-buffer) | |
| 1395 | (define-key ctl-x-map "s" 'save-some-buffers) | |
| 1396 | (define-key ctl-x-map "\C-w" 'write-file) | |
| 1397 | (define-key ctl-x-map "i" 'insert-file) | |
| 1398 | (define-key esc-map "~" 'not-modified) | |
| 1399 | (define-key ctl-x-map "\C-d" 'list-directory) | |
| 1400 | (define-key ctl-x-map "\C-c" 'save-buffers-kill-emacs) | |
| 1401 | ||
| 1402 | (define-key ctl-x-4-map "f" 'find-file-other-window) | |
| 1403 | (define-key ctl-x-4-map "r" 'find-file-read-only-other-window) | |
| 1404 | (define-key ctl-x-4-map "\C-f" 'find-file-other-window) | |
| 1405 | (define-key ctl-x-4-map "b" 'switch-to-buffer-other-window) | |
| 35aaf00c | 1406 | (define-key ctl-x-4-map "o" 'display-buffer) |
| 5bbbceb1 | 1407 | |
| f98955ea JB |
1408 | (define-key ctl-x-5-map "b" 'switch-to-buffer-other-frame) |
| 1409 | (define-key ctl-x-5-map "f" 'find-file-other-frame) | |
| 1410 | (define-key ctl-x-5-map "\C-f" 'find-file-other-frame) | |
| 1411 | (define-key ctl-x-5-map "r" 'find-file-read-only-other-frame) | |
| c0274f38 ER |
1412 | |
| 1413 | ;;; files.el ends here |