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c0274f38 ER |
1 | ;;; files.el --- file input and output commands for Emacs |
2 | ||
8c0e7b73 | 3 | ;; Copyright (C) 1985, 1986, 1987, 1992 Free Software Foundation, Inc. |
b4da00e9 | 4 | |
3a801d0c ER |
5 | ;; Maintainer: FSF |
6 | ||
b4da00e9 RM |
7 | ;; This file is part of GNU Emacs. |
8 | ||
9 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 11 | ;; the Free Software Foundation; either version 2, or (at your option) |
b4da00e9 RM |
12 | ;; any later version. |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
20 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
21 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | ||
e5167999 ER |
23 | ;;; Code: |
24 | ||
b4da00e9 RM |
25 | (defconst delete-auto-save-files t |
26 | "*Non-nil means delete a buffer's auto-save file when the buffer is saved.") | |
27 | ||
28 | (defconst directory-abbrev-alist | |
29 | nil | |
30 | "*Alist of abbreviations for file directories. | |
31 | A list of elements of the form (FROM . TO), each meaning to replace | |
32 | FROM with TO when it appears in a directory name. This replacement is | |
33 | done when setting up the default directory of a newly visited file. | |
34 | *Every* FROM string should start with `^'. | |
35 | ||
36 | Use this feature when you have directories which you normally refer to | |
37 | via absolute symbolic links. Make TO the name of the link, and FROM | |
38 | the name it is linked to.") | |
39 | ||
40 | ;;; Turn off backup files on VMS since it has version numbers. | |
41 | (defconst make-backup-files (not (eq system-type 'vax-vms)) | |
42 | "*Create a backup of each file when it is saved for the first time. | |
43 | This can be done by renaming the file or by copying. | |
44 | ||
45 | Renaming means that Emacs renames the existing file so that it is a | |
46 | backup file, then writes the buffer into a new file. Any other names | |
47 | that the old file had will now refer to the backup file. The new file | |
48 | is owned by you and its group is defaulted. | |
49 | ||
50 | Copying means that Emacs copies the existing file into the backup | |
51 | file, then writes the buffer on top of the existing file. Any other | |
52 | names that the old file had will now refer to the new (edited) file. | |
53 | The file's owner and group are unchanged. | |
54 | ||
55 | The choice of renaming or copying is controlled by the variables | |
56 | `backup-by-copying', `backup-by-copying-when-linked' and | |
57 | `backup-by-copying-when-mismatch'.") | |
58 | ||
59 | ;; Do this so that local variables based on the file name | |
60 | ;; are not overridden by the major mode. | |
61 | (defvar backup-inhibited nil | |
62 | "Non-nil means don't make a backup file for this buffer.") | |
63 | (put 'backup-inhibited 'permanent-local t) | |
64 | ||
65 | (defconst backup-by-copying nil | |
66 | "*Non-nil means always use copying to create backup files. | |
67 | See documentation of variable `make-backup-files'.") | |
68 | ||
69 | (defconst backup-by-copying-when-linked nil | |
70 | "*Non-nil means use copying to create backups for files with multiple names. | |
71 | This causes the alternate names to refer to the latest version as edited. | |
72 | This variable is relevant only if `backup-by-copying' is nil.") | |
73 | ||
74 | (defconst backup-by-copying-when-mismatch nil | |
75 | "*Non-nil means create backups by copying if this preserves owner or group. | |
76 | Renaming may still be used (subject to control of other variables) | |
77 | when it would not result in changing the owner or group of the file; | |
78 | that is, for files which are owned by you and whose group matches | |
79 | the default for a new file created there by you. | |
80 | This variable is relevant only if `backup-by-copying' is nil.") | |
81 | ||
82 | (defvar backup-enable-predicate | |
83 | '(lambda (name) | |
84 | (or (< (length name) 5) | |
85 | (not (string-equal "/tmp/" (substring name 0 5))))) | |
86 | "Predicate that looks at a file name and decides whether to make backups. | |
87 | Called with an absolute file name as argument, it returns t to enable backup.") | |
88 | ||
89 | (defconst buffer-offer-save nil | |
90 | "*Non-nil in a buffer means offer to save the buffer on exit | |
91 | even if the buffer is not visiting a file. | |
92 | Automatically local in all buffers.") | |
93 | (make-variable-buffer-local 'buffer-offer-save) | |
94 | ||
95 | (defconst file-precious-flag nil | |
96 | "*Non-nil means protect against I/O errors while saving files. | |
97 | Some modes set this non-nil in particular buffers.") | |
98 | ||
99 | (defvar version-control nil | |
100 | "*Control use of version numbers for backup files. | |
101 | t means make numeric backup versions unconditionally. | |
102 | nil means make them for files that have some already. | |
103 | never means do not make them.") | |
104 | ||
105 | (defvar dired-kept-versions 2 | |
106 | "*When cleaning directory, number of versions to keep.") | |
107 | ||
108 | (defvar trim-versions-without-asking nil | |
6d74b528 ER |
109 | "*If t, deletes excess backup versions silently. |
110 | If nil, asks confirmation. Any other value prevents any trimming.") | |
b4da00e9 RM |
111 | |
112 | (defvar kept-old-versions 2 | |
113 | "*Number of oldest versions to keep when a new numbered backup is made.") | |
114 | ||
115 | (defvar kept-new-versions 2 | |
116 | "*Number of newest versions to keep when a new numbered backup is made. | |
117 | Includes the new backup. Must be > 0") | |
118 | ||
119 | (defconst require-final-newline nil | |
120 | "*Value of t says silently ensure a file ends in a newline when it is saved. | |
121 | Non-nil but not t says ask user whether to add a newline when there isn't one. | |
122 | nil means don't add newlines.") | |
123 | ||
124 | (defconst auto-save-default t | |
125 | "*Non-nil says by default do auto-saving of every file-visiting buffer.") | |
126 | ||
127 | (defconst auto-save-visited-file-name nil | |
128 | "*Non-nil says auto-save a buffer in the file it is visiting, when practical. | |
129 | Normally auto-save files are written under other names.") | |
130 | ||
131 | (defconst save-abbrevs nil | |
132 | "*Non-nil means save word abbrevs too when files are saved. | |
133 | Loading an abbrev file sets this to t.") | |
134 | ||
135 | (defconst find-file-run-dired t | |
136 | "*Non-nil says run dired if find-file is given the name of a directory.") | |
137 | ||
138 | (put 'find-file-not-found-hooks 'permanent-local t) | |
139 | (defvar find-file-not-found-hooks nil | |
140 | "List of functions to be called for `find-file' on nonexistent file. | |
141 | These functions are called as soon as the error is detected. | |
142 | `buffer-file-name' is already set up. | |
143 | The functions are called in the order given until one of them returns non-nil.") | |
144 | ||
145 | (put 'find-file-hooks 'permanent-local t) | |
146 | (defvar find-file-hooks nil | |
147 | "List of functions to be called after a buffer is loaded from a file. | |
148 | The buffer's local variables (if any) will have been processed before the | |
149 | functions are called.") | |
150 | ||
151 | (put 'write-file-hooks 'permanent-local t) | |
152 | (defvar write-file-hooks nil | |
153 | "List of functions to be called before writing out a buffer to a file. | |
154 | If one of them returns non-nil, the file is considered already written | |
8c0e7b73 JB |
155 | and the rest are not called. |
156 | These hooks are considered to pertain to the visited file. | |
157 | So this list is cleared if you change the visited file name. | |
158 | See also `write-contents-hooks'.") | |
159 | ||
160 | (defvar write-contents-hooks nil | |
161 | "List of functions to be called before writing out a buffer to a file. | |
162 | If one of them returns non-nil, the file is considered already written | |
163 | and the rest are not called. | |
164 | These hooks are considered to pertain to the buffer's contents, | |
165 | not to the particular visited file; thus, `set-visited-file-name' does | |
166 | not clear this variable, but changing the major mode does clear it. | |
167 | See also `write-file-hooks'.") | |
b4da00e9 RM |
168 | |
169 | (defconst enable-local-variables t | |
170 | "*Control use of local-variables lists in files you visit. | |
171 | The value can be t, nil or something else. | |
172 | A value of t means local-variables lists are obeyed; | |
173 | nil means they are ignored; anything else means query. | |
174 | ||
175 | The command \\[normal-mode] always obeys local-variables lists | |
176 | and ignores this variable.") | |
177 | ||
2bba782c | 178 | (defconst enable-local-eval 'maybe |
d207b766 RS |
179 | "*Control processing of the \"variable\" `eval' in a file's local variables. |
180 | The value can be t, nil or something else. | |
181 | A value of t means obey `eval' variables; | |
182 | nil means ignore them; anything else means query. | |
183 | ||
184 | The command \\[normal-mode] always obeys local-variables lists | |
185 | and ignores this variable.") | |
b4da00e9 RM |
186 | |
187 | ;; Avoid losing in versions where CLASH_DETECTION is disabled. | |
188 | (or (fboundp 'lock-buffer) | |
189 | (fset 'lock-buffer 'ignore)) | |
190 | (or (fboundp 'unlock-buffer) | |
191 | (fset 'unlock-buffer 'ignore)) | |
192 | \f | |
193 | (defun pwd () | |
194 | "Show the current default directory." | |
195 | (interactive nil) | |
196 | (message "Directory %s" default-directory)) | |
197 | ||
198 | (defun cd (dir) | |
199 | "Make DIR become the current buffer's default directory." | |
200 | (interactive "DChange default directory: ") | |
201 | (setq dir (expand-file-name dir)) | |
202 | (if (not (eq system-type 'vax-vms)) | |
203 | (setq dir (file-name-as-directory dir))) | |
204 | (if (not (file-directory-p dir)) | |
205 | (error "%s is not a directory" dir) | |
206 | (if (file-executable-p dir) | |
207 | (setq default-directory dir) | |
208 | (error "Cannot cd to %s: Permission denied" dir))) | |
5bbbceb1 JB |
209 | ;; We used to call pwd at this point. That's not terribly helpful |
210 | ;; when we're invoking cd interactively, and the new cmushell-based | |
211 | ;; shell has its own (better) facilities for this. | |
212 | ) | |
b4da00e9 RM |
213 | |
214 | (defun load-file (file) | |
215 | "Load the Lisp file named FILE." | |
216 | (interactive "fLoad file: ") | |
217 | (load (expand-file-name file) nil nil t)) | |
218 | ||
219 | (defun load-library (library) | |
220 | "Load the library named LIBRARY. | |
221 | This is an interface to the function `load'." | |
222 | (interactive "sLoad library: ") | |
223 | (load library)) | |
5d68c2c2 RS |
224 | |
225 | ;; OTHER is the other file to be compared. | |
226 | (defun file-local-copy (file) | |
227 | "Copy the file FILE into a temporary file on this machine. | |
228 | Returns the name of the local copy, or nil, if FILE is directly | |
229 | accessible." | |
230 | (let (handler (handlers file-name-handler-alist)) | |
231 | (save-match-data | |
232 | (while (and (consp handlers) (null handler)) | |
233 | (if (and (consp (car handlers)) | |
234 | (stringp (car (car handlers))) | |
235 | (string-match (car (car handlers)) file)) | |
236 | (setq handler (cdr (car handlers)))) | |
237 | (setq handlers (cdr handlers)))) | |
238 | (if handler | |
239 | (funcall handler 'file-local-copy file) | |
240 | nil))) | |
b4da00e9 RM |
241 | \f |
242 | (defun switch-to-buffer-other-window (buffer) | |
243 | "Select buffer BUFFER in another window." | |
244 | (interactive "BSwitch to buffer in other window: ") | |
245 | (let ((pop-up-windows t)) | |
246 | (pop-to-buffer buffer t))) | |
247 | ||
f98955ea JB |
248 | (defun switch-to-buffer-other-frame (buffer) |
249 | "Switch to buffer BUFFER in another frame." | |
250 | (interactive "BSwitch to buffer in other frame: ") | |
251 | (let ((pop-up-frames t)) | |
5bbbceb1 JB |
252 | (pop-to-buffer buffer))) |
253 | ||
b4da00e9 RM |
254 | (defun find-file (filename) |
255 | "Edit file FILENAME. | |
256 | Switch to a buffer visiting file FILENAME, | |
257 | creating one if none already exists." | |
258 | (interactive "FFind file: ") | |
259 | (switch-to-buffer (find-file-noselect filename))) | |
260 | ||
261 | (defun find-file-other-window (filename) | |
262 | "Edit file FILENAME, in another window. | |
263 | May create a new window, or reuse an existing one. | |
264 | See the function `display-buffer'." | |
265 | (interactive "FFind file in other window: ") | |
266 | (switch-to-buffer-other-window (find-file-noselect filename))) | |
267 | ||
f98955ea JB |
268 | (defun find-file-other-frame (filename) |
269 | "Edit file FILENAME, in another frame. | |
270 | May create a new frame, or reuse an existing one. | |
5bbbceb1 | 271 | See the function `display-buffer'." |
f98955ea JB |
272 | (interactive "FFind file in other frame: ") |
273 | (switch-to-buffer-other-frame (find-file-noselect filename))) | |
5bbbceb1 | 274 | |
b4da00e9 RM |
275 | (defun find-file-read-only (filename) |
276 | "Edit file FILENAME but don't allow changes. | |
277 | Like \\[find-file] but marks buffer as read-only. | |
278 | Use \\[toggle-read-only] to permit editing." | |
279 | (interactive "fFind file read-only: ") | |
280 | (find-file filename) | |
281 | (setq buffer-read-only t)) | |
282 | ||
283 | (defun find-file-read-only-other-window (filename) | |
284 | "Edit file FILENAME in another window but don't allow changes. | |
285 | Like \\[find-file-other-window] but marks buffer as read-only. | |
286 | Use \\[toggle-read-only] to permit editing." | |
287 | (interactive "fFind file read-only other window: ") | |
288 | (find-file filename) | |
289 | (setq buffer-read-only t)) | |
290 | ||
f98955ea JB |
291 | (defun find-file-read-only-other-frame (filename) |
292 | "Edit file FILENAME in another frame but don't allow changes. | |
293 | Like \\[find-file-other-frame] but marks buffer as read-only. | |
5bbbceb1 | 294 | Use \\[toggle-read-only] to permit editing." |
f98955ea JB |
295 | (interactive "fFind file read-only other frame: ") |
296 | (find-file-other-frame filename) | |
5bbbceb1 JB |
297 | (setq buffer-read-only t)) |
298 | ||
b4da00e9 RM |
299 | (defun find-alternate-file (filename) |
300 | "Find file FILENAME, select its buffer, kill previous buffer. | |
301 | If the current buffer now contains an empty file that you just visited | |
302 | \(presumably by mistake), use this command to visit the file you really want." | |
303 | (interactive | |
304 | (let ((file buffer-file-name) | |
305 | (file-name nil) | |
306 | (file-dir nil)) | |
307 | (and file | |
308 | (setq file-name (file-name-nondirectory file) | |
309 | file-dir (file-name-directory file))) | |
a61f59b4 JA |
310 | (list (read-file-name |
311 | "Find alternate file: " file-dir nil nil file-name)))) | |
b4da00e9 RM |
312 | (and (buffer-modified-p) |
313 | ;; (not buffer-read-only) | |
314 | (not (yes-or-no-p (format "Buffer %s is modified; kill anyway? " | |
315 | (buffer-name)))) | |
316 | (error "Aborted")) | |
317 | (let ((obuf (current-buffer)) | |
318 | (ofile buffer-file-name) | |
319 | (oname (buffer-name))) | |
320 | (rename-buffer " **lose**") | |
321 | (setq buffer-file-name nil) | |
322 | (unwind-protect | |
323 | (progn | |
324 | (unlock-buffer) | |
325 | (find-file filename)) | |
326 | (cond ((eq obuf (current-buffer)) | |
327 | (setq buffer-file-name ofile) | |
328 | (lock-buffer) | |
329 | (rename-buffer oname)))) | |
330 | (or (eq (current-buffer) obuf) | |
331 | (kill-buffer obuf)))) | |
332 | ||
333 | (defun create-file-buffer (filename) | |
334 | "Create a suitably named buffer for visiting FILENAME, and return it. | |
335 | FILENAME (sans directory) is used unchanged if that name is free; | |
336 | otherwise a string <2> or <3> or ... is appended to get an unused name." | |
337 | (let ((lastname (file-name-nondirectory filename))) | |
338 | (if (string= lastname "") | |
339 | (setq lastname filename)) | |
340 | (generate-new-buffer lastname))) | |
341 | ||
5bbbceb1 JB |
342 | (defun generate-new-buffer (name) |
343 | "Create and return a buffer with a name based on NAME. | |
344 | Choose the buffer's name using generate-new-buffer-name." | |
345 | (get-buffer-create (generate-new-buffer-name name))) | |
346 | ||
e373f201 JB |
347 | (defconst automount-dir-prefix "^/tmp_mnt/" |
348 | "Regexp to match the automounter prefix in a directory name.") | |
349 | ||
5bbbceb1 JB |
350 | (defun abbreviate-file-name (filename) |
351 | "Return a version of FILENAME shortened using directory-abbrev-alist. | |
352 | This also substitutes \"~\" for the user's home directory. | |
353 | See \\[describe-variable] directory-abbrev-alist RET for more information." | |
e373f201 JB |
354 | ;; Get rid of the prefixes added by the automounter. |
355 | (if (and (string-match automount-dir-prefix filename) | |
356 | (file-exists-p (file-name-directory | |
357 | (substring filename (1- (match-end 0)))))) | |
358 | (setq filename (substring filename (1- (match-end 0))))) | |
5bbbceb1 JB |
359 | (let ((tail directory-abbrev-alist)) |
360 | (while tail | |
361 | (if (string-match (car (car tail)) filename) | |
362 | (setq filename | |
363 | (concat (cdr (car tail)) (substring filename (match-end 0))))) | |
364 | (setq tail (cdr tail))) | |
365 | (if (string-match (concat "^" (expand-file-name "~")) filename) | |
366 | (setq filename | |
367 | (concat "~" (substring filename (match-end 0))))) | |
368 | filename)) | |
369 | ||
b4da00e9 RM |
370 | (defun find-file-noselect (filename &optional nowarn) |
371 | "Read file FILENAME into a buffer and return the buffer. | |
372 | If a buffer exists visiting FILENAME, return that one, but | |
373 | verify that the file has not changed since visited or saved. | |
374 | The buffer is not selected, just returned to the caller." | |
e373f201 JB |
375 | (setq filename |
376 | (abbreviate-file-name | |
377 | (expand-file-name filename))) | |
b4da00e9 RM |
378 | (if (file-directory-p filename) |
379 | (if find-file-run-dired | |
380 | (dired-noselect filename) | |
381 | (error "%s is a directory." filename)) | |
382 | (let ((buf (get-file-buffer filename)) | |
383 | error) | |
384 | (if buf | |
385 | (or nowarn | |
386 | (verify-visited-file-modtime buf) | |
387 | (cond ((not (file-exists-p filename)) | |
388 | (error "File %s no longer exists!" filename)) | |
389 | ((yes-or-no-p | |
390 | (format | |
391 | (if (buffer-modified-p buf) | |
392 | "File %s changed on disk. Discard your edits? " | |
393 | "File %s changed on disk. Read the new version? ") | |
394 | (file-name-nondirectory filename))) | |
395 | (save-excursion | |
396 | (set-buffer buf) | |
397 | (revert-buffer t t))))) | |
398 | (save-excursion | |
399 | (let* ((link-name (car (file-attributes filename))) | |
400 | (linked-buf (and (stringp link-name) | |
401 | (get-file-buffer link-name)))) | |
402 | (if (bufferp linked-buf) | |
403 | (message "Symbolic link to file in buffer %s" | |
404 | (buffer-name linked-buf)))) | |
405 | (setq buf (create-file-buffer filename)) | |
406 | (set-buffer buf) | |
407 | (erase-buffer) | |
408 | (condition-case () | |
409 | (insert-file-contents filename t) | |
410 | (file-error | |
411 | (setq error t) | |
412 | ;; Run find-file-not-found-hooks until one returns non-nil. | |
413 | (let ((hooks find-file-not-found-hooks)) | |
414 | (while (and hooks | |
415 | (not (funcall (car hooks)))) | |
416 | (setq hooks (cdr hooks)))))) | |
417 | ;; Set buffer's default directory to that of the file. | |
418 | (setq default-directory (file-name-directory filename)) | |
419 | ;; Turn off backup files for certain file names. Since | |
420 | ;; this is a permanent local, the major mode won't eliminate it. | |
421 | (and (not (funcall backup-enable-predicate buffer-file-name)) | |
422 | (progn | |
423 | (make-local-variable 'backup-inhibited) | |
424 | (setq backup-inhibited t))) | |
425 | (after-find-file error (not nowarn)))) | |
426 | buf))) | |
427 | \f | |
428 | (defun after-find-file (&optional error warn) | |
429 | "Called after finding a file and by the default revert function. | |
430 | Sets buffer mode, parses local variables. | |
431 | Optional args ERROR and WARN: ERROR non-nil means there was an | |
432 | error in reading the file. WARN non-nil means warn if there | |
433 | exists an auto-save file more recent than the visited file. | |
434 | Finishes by calling the functions in `find-file-hooks'." | |
435 | (setq buffer-read-only (not (file-writable-p buffer-file-name))) | |
436 | (if noninteractive | |
437 | nil | |
438 | (let* (not-serious | |
439 | (msg | |
440 | (cond ((and error (file-attributes buffer-file-name)) | |
441 | (setq buffer-read-only t) | |
442 | "File exists, but is read-protected.") | |
443 | ((not buffer-read-only) | |
444 | (if (and warn | |
445 | (file-newer-than-file-p (make-auto-save-file-name) | |
446 | buffer-file-name)) | |
447 | "Auto save file is newer; consider M-x recover-file" | |
448 | (setq not-serious t) | |
449 | (if error "(New file)" nil))) | |
450 | ((not error) | |
451 | (setq not-serious t) | |
452 | "Note: file is write protected") | |
453 | ((file-attributes (directory-file-name default-directory)) | |
454 | "File not found and directory write-protected") | |
455 | (t | |
5bbbceb1 JB |
456 | ;; If the directory the buffer is in doesn't exist, |
457 | ;; offer to create it. It's better to do this now | |
458 | ;; than when we save the buffer, because we want | |
459 | ;; autosaving to work. | |
460 | (setq buffer-read-only nil) | |
461 | (or (file-exists-p (file-name-directory buffer-file-name)) | |
462 | (if (yes-or-no-p | |
463 | (format | |
464 | "The directory containing %s does not exist. Create? " | |
465 | (abbreviate-file-name buffer-file-name))) | |
466 | (make-directory-path | |
467 | (file-name-directory buffer-file-name)))) | |
468 | nil)))) | |
b4da00e9 RM |
469 | (if msg |
470 | (progn | |
471 | (message msg) | |
472 | (or not-serious (sit-for 1 nil t))))) | |
473 | (if auto-save-default | |
474 | (auto-save-mode t))) | |
475 | (normal-mode t) | |
476 | (mapcar 'funcall find-file-hooks)) | |
477 | ||
478 | (defun normal-mode (&optional find-file) | |
479 | "Choose the major mode for this buffer automatically. | |
480 | Also sets up any specified local variables of the file. | |
481 | Uses the visited file name, the -*- line, and the local variables spec. | |
482 | ||
483 | This function is called automatically from `find-file'. In that case, | |
484 | we may set up specified local variables depending on the value of | |
485 | `enable-local-variables': if it is t, we do; if it is nil, we don't; | |
486 | otherwise, we query. `enable-local-variables' is ignored if you | |
487 | run `normal-mode' explicitly." | |
488 | (interactive) | |
489 | (or find-file (funcall (or default-major-mode 'fundamental-mode))) | |
490 | (condition-case err | |
491 | (set-auto-mode) | |
492 | (error (message "File mode specification error: %s" | |
493 | (prin1-to-string err)))) | |
494 | (condition-case err | |
7b3f3dc2 JB |
495 | (let ((enable-local-variables (or (not find-file) |
496 | enable-local-variables))) | |
497 | (hack-local-variables)) | |
b4da00e9 RM |
498 | (error (message "File local-variables error: %s" |
499 | (prin1-to-string err))))) | |
500 | ||
7b3f3dc2 JB |
501 | (defvar auto-mode-alist (mapcar 'purecopy |
502 | '(("\\.text\\'" . text-mode) | |
503 | ("\\.c\\'" . c-mode) | |
504 | ("\\.h\\'" . c-mode) | |
505 | ("\\.tex\\'" . TeX-mode) | |
506 | ("\\.ltx\\'" . LaTeX-mode) | |
507 | ("\\.el\\'" . emacs-lisp-mode) | |
508 | ("\\.mm\\'" . nroff-mode) | |
509 | ("\\.me\\'" . nroff-mode) | |
7b3f3dc2 JB |
510 | ("\\.scm\\'" . scheme-mode) |
511 | ("\\.l\\'" . lisp-mode) | |
512 | ("\\.lisp\\'" . lisp-mode) | |
513 | ("\\.f\\'" . fortran-mode) | |
514 | ("\\.for\\'" . fortran-mode) | |
515 | ("\\.mss\\'" . scribe-mode) | |
516 | ("\\.pl\\'" . prolog-mode) | |
517 | ("\\.cc\\'" . c++-mode) | |
518 | ("\\.C\\'" . c++-mode) | |
519 | ;;; Less common extensions come here | |
520 | ;;; so more common ones above are found faster. | |
521 | ("\\.s\\'" . asm-mode) | |
522 | ("ChangeLog\\'" . change-log-mode) | |
7adc58e5 | 523 | ("ChangeLog.[0-9]+\\'" . change-log-mode) |
7b3f3dc2 | 524 | ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode) |
7adc58e5 RS |
525 | ;; The following should come after the ChangeLog pattern |
526 | ;; for the sake of ChangeLog.1, etc. | |
527 | ("\\.[12345678]\\'" . nroff-mode) | |
7b3f3dc2 JB |
528 | ("\\.TeX\\'" . TeX-mode) |
529 | ("\\.sty\\'" . LaTeX-mode) | |
530 | ("\\.bbl\\'" . LaTeX-mode) | |
531 | ("\\.bib\\'" . bibtex-mode) | |
532 | ("\\.article\\'" . text-mode) | |
533 | ("\\.letter\\'" . text-mode) | |
534 | ("\\.texinfo\\'" . texinfo-mode) | |
fd5285f3 | 535 | ("\\.texi\\'" . texinfo-mode) |
7b3f3dc2 JB |
536 | ("\\.lsp\\'" . lisp-mode) |
537 | ("\\.awk\\'" . awk-mode) | |
538 | ("\\.prolog\\'" . prolog-mode) | |
539 | ;; Mailer puts message to be edited in | |
540 | ;; /tmp/Re.... or Message | |
541 | ("^/tmp/Re" . text-mode) | |
542 | ("/Message[0-9]*\\'" . text-mode) | |
543 | ;; some news reader is reported to use this | |
544 | ("^/tmp/fol/" . text-mode) | |
545 | ("\\.y\\'" . c-mode) | |
546 | ("\\.oak\\'" . scheme-mode) | |
547 | ("\\.scm.[0-9]*\\'" . scheme-mode) | |
548 | ;; .emacs following a directory delimiter | |
549 | ;; in either Unix or VMS syntax. | |
550 | ("[]>:/]\\..*emacs\\'" . emacs-lisp-mode) | |
551 | ("\\.ml\\'" . lisp-mode))) | |
552 | "\ | |
553 | Alist of filename patterns vs corresponding major mode functions. | |
554 | Each element looks like (REGEXP . FUNCTION). | |
555 | Visiting a file whose name matches REGEXP causes FUNCTION to be called.") | |
556 | ||
b4da00e9 RM |
557 | (defun set-auto-mode () |
558 | "Select major mode appropriate for current buffer. | |
7b3f3dc2 JB |
559 | This checks for a -*- mode tag in the buffer's text, or |
560 | compares the filename against the entries in auto-mode-alist. It does | |
561 | not check for the \"mode:\" local variable in the Local Variables | |
562 | section of the file; for that, use `hack-local-variables'. | |
563 | ||
564 | If enable-local-variables is nil, this function will not check for a | |
565 | -*- mode tag." | |
b4da00e9 RM |
566 | ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- |
567 | (let (beg end mode) | |
568 | (save-excursion | |
569 | (goto-char (point-min)) | |
570 | (skip-chars-forward " \t\n") | |
7b3f3dc2 JB |
571 | (if (and enable-local-variables |
572 | (search-forward "-*-" (save-excursion (end-of-line) (point)) t) | |
b4da00e9 RM |
573 | (progn |
574 | (skip-chars-forward " \t") | |
575 | (setq beg (point)) | |
7b3f3dc2 JB |
576 | (search-forward "-*-" |
577 | (save-excursion (end-of-line) (point)) | |
578 | t)) | |
b4da00e9 RM |
579 | (progn |
580 | (forward-char -3) | |
581 | (skip-chars-backward " \t") | |
582 | (setq end (point)) | |
583 | (goto-char beg) | |
584 | (if (search-forward ":" end t) | |
585 | (progn | |
586 | (goto-char beg) | |
587 | (if (let ((case-fold-search t)) | |
588 | (search-forward "mode:" end t)) | |
589 | (progn | |
590 | (skip-chars-forward " \t") | |
591 | (setq beg (point)) | |
592 | (if (search-forward ";" end t) | |
593 | (forward-char -1) | |
594 | (goto-char end)) | |
595 | (skip-chars-backward " \t") | |
596 | (setq mode (buffer-substring beg (point)))))) | |
597 | (setq mode (buffer-substring beg end))))) | |
598 | (setq mode (intern (concat (downcase mode) "-mode"))) | |
599 | (let ((alist auto-mode-alist) | |
600 | (name buffer-file-name)) | |
601 | (let ((case-fold-search (eq system-type 'vax-vms))) | |
602 | ;; Remove backup-suffixes from file name. | |
603 | (setq name (file-name-sans-versions name)) | |
604 | ;; Find first matching alist entry. | |
605 | (while (and (not mode) alist) | |
606 | (if (string-match (car (car alist)) name) | |
607 | (setq mode (cdr (car alist)))) | |
608 | (setq alist (cdr alist))))))) | |
609 | (if mode (funcall mode)))) | |
610 | ||
7b3f3dc2 | 611 | (defun hack-local-variables () |
b4da00e9 RM |
612 | "Parse (and bind or evaluate as appropriate) any local variables |
613 | for current buffer." | |
614 | ;; Look for "Local variables:" line in last page. | |
615 | (save-excursion | |
616 | (goto-char (point-max)) | |
617 | (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) | |
618 | (if (let ((case-fold-search t)) | |
619 | (and (search-forward "Local Variables:" nil t) | |
7b3f3dc2 | 620 | (or (eq enable-local-variables t) |
b4da00e9 RM |
621 | (and enable-local-variables |
622 | (save-window-excursion | |
623 | (switch-to-buffer (current-buffer)) | |
624 | (save-excursion | |
625 | (beginning-of-line) | |
626 | (set-window-start (selected-window) (point))) | |
627 | (y-or-n-p (format "Set local variables as specified at end of %s? " | |
628 | (file-name-nondirectory buffer-file-name)))))))) | |
629 | (let ((continue t) | |
2bba782c RS |
630 | prefix prefixlen suffix beg |
631 | (enable-local-eval enable-local-eval)) | |
b4da00e9 RM |
632 | ;; The prefix is what comes before "local variables:" in its line. |
633 | ;; The suffix is what comes after "local variables:" in its line. | |
634 | (skip-chars-forward " \t") | |
635 | (or (eolp) | |
636 | (setq suffix (buffer-substring (point) | |
637 | (progn (end-of-line) (point))))) | |
638 | (goto-char (match-beginning 0)) | |
639 | (or (bolp) | |
640 | (setq prefix | |
641 | (buffer-substring (point) | |
642 | (progn (beginning-of-line) (point))))) | |
7b3f3dc2 | 643 | |
b4da00e9 RM |
644 | (if prefix (setq prefixlen (length prefix) |
645 | prefix (regexp-quote prefix))) | |
646 | (if suffix (setq suffix (concat (regexp-quote suffix) "$"))) | |
647 | (while continue | |
648 | ;; Look at next local variable spec. | |
649 | (if selective-display (re-search-forward "[\n\C-m]") | |
650 | (forward-line 1)) | |
651 | ;; Skip the prefix, if any. | |
652 | (if prefix | |
653 | (if (looking-at prefix) | |
654 | (forward-char prefixlen) | |
655 | (error "Local variables entry is missing the prefix"))) | |
656 | ;; Find the variable name; strip whitespace. | |
657 | (skip-chars-forward " \t") | |
658 | (setq beg (point)) | |
659 | (skip-chars-forward "^:\n") | |
660 | (if (eolp) (error "Missing colon in local variables entry")) | |
661 | (skip-chars-backward " \t") | |
662 | (let* ((str (buffer-substring beg (point))) | |
663 | (var (read str)) | |
664 | val) | |
665 | ;; Setting variable named "end" means end of list. | |
666 | (if (string-equal (downcase str) "end") | |
667 | (setq continue nil) | |
668 | ;; Otherwise read the variable value. | |
669 | (skip-chars-forward "^:") | |
670 | (forward-char 1) | |
671 | (setq val (read (current-buffer))) | |
672 | (skip-chars-backward "\n") | |
673 | (skip-chars-forward " \t") | |
674 | (or (if suffix (looking-at suffix) (eolp)) | |
675 | (error "Local variables entry is terminated incorrectly")) | |
676 | ;; Set the variable. "Variables" mode and eval are funny. | |
677 | (cond ((eq var 'mode) | |
678 | (funcall (intern (concat (downcase (symbol-name val)) | |
679 | "-mode")))) | |
680 | ((eq var 'eval) | |
d207b766 RS |
681 | (if (and (not (string= (user-login-name) "root")) |
682 | (or (eq enable-local-eval t) | |
683 | (and enable-local-eval | |
684 | (save-window-excursion | |
685 | (switch-to-buffer (current-buffer)) | |
686 | (save-excursion | |
687 | (beginning-of-line) | |
688 | (set-window-start (selected-window) (point))) | |
2bba782c RS |
689 | (setq enable-local-eval |
690 | (y-or-n-p (format "Process `eval' local variable in file %s? " | |
691 | (file-name-nondirectory buffer-file-name)))))))) | |
d207b766 RS |
692 | (save-excursion (eval val)) |
693 | (message "Ignoring `eval:' in file's local variables"))) | |
b4da00e9 RM |
694 | (t (make-local-variable var) |
695 | (set var val)))))))))) | |
696 | \f | |
697 | (defun set-visited-file-name (filename) | |
698 | "Change name of file visited in current buffer to FILENAME. | |
699 | The next time the buffer is saved it will go in the newly specified file. | |
700 | nil or empty string as argument means make buffer not be visiting any file. | |
701 | Remember to delete the initial contents of the minibuffer | |
702 | if you wish to pass an empty string as the argument." | |
703 | (interactive "FSet visited file name: ") | |
704 | (if filename | |
705 | (setq filename | |
706 | (if (string-equal filename "") | |
707 | nil | |
708 | (expand-file-name filename)))) | |
709 | (or (equal filename buffer-file-name) | |
710 | (null filename) | |
711 | (progn | |
712 | (lock-buffer filename) | |
713 | (unlock-buffer))) | |
714 | (setq buffer-file-name filename) | |
715 | (if filename ; make buffer name reflect filename. | |
5bbbceb1 | 716 | (let ((new-name (file-name-nondirectory buffer-file-name))) |
b4da00e9 RM |
717 | (if (string= new-name "") |
718 | (error "Empty file name")) | |
719 | (if (eq system-type 'vax-vms) | |
720 | (setq new-name (downcase new-name))) | |
721 | (setq default-directory (file-name-directory buffer-file-name)) | |
5bbbceb1 | 722 | (rename-buffer new-name t))) |
b4da00e9 RM |
723 | (setq buffer-backed-up nil) |
724 | (clear-visited-file-modtime) | |
725 | ;; write-file-hooks is normally used for things like ftp-find-file | |
726 | ;; that visit things that are not local files as if they were files. | |
727 | ;; Changing to visit an ordinary local file instead should flush the hook. | |
728 | (kill-local-variable 'write-file-hooks) | |
729 | (kill-local-variable 'revert-buffer-function) | |
730 | (kill-local-variable 'backup-inhibited) | |
731 | ;; Turn off backup files for certain file names. | |
732 | ;; Since this is a permanent local, the major mode won't eliminate it. | |
733 | (and (not (funcall backup-enable-predicate buffer-file-name)) | |
734 | (progn | |
735 | (make-local-variable 'backup-inhibited) | |
736 | (setq backup-inhibited t))) | |
737 | ;; If auto-save was not already on, turn it on if appropriate. | |
738 | (if (not buffer-auto-save-file-name) | |
739 | (auto-save-mode (and buffer-file-name auto-save-default))) | |
740 | (if buffer-file-name | |
741 | (set-buffer-modified-p t))) | |
742 | ||
743 | (defun write-file (filename) | |
744 | "Write current buffer into file FILENAME. | |
745 | Makes buffer visit that file, and marks it not modified." | |
746 | ;; (interactive "FWrite file: ") | |
747 | (interactive | |
748 | (list (if buffer-file-name | |
749 | (read-file-name "Write file: " | |
750 | nil nil nil nil) | |
751 | (read-file-name "Write file: " | |
752 | (cdr (assq 'default-directory | |
753 | (buffer-local-variables))) | |
754 | nil nil (buffer-name))))) | |
755 | (or (null filename) (string-equal filename "") | |
756 | (set-visited-file-name filename)) | |
757 | (set-buffer-modified-p t) | |
758 | (save-buffer)) | |
759 | \f | |
760 | (defun backup-buffer () | |
761 | "Make a backup of the disk file visited by the current buffer, if appropriate. | |
762 | This is normally done before saving the buffer the first time. | |
763 | If the value is non-nil, it is the result of `file-modes' on the original | |
764 | file; this means that the caller, after saving the buffer, should change | |
765 | the modes of the new file to agree with the old modes." | |
766 | (if (and make-backup-files (not backup-inhibited) | |
767 | (not buffer-backed-up) | |
768 | (file-exists-p buffer-file-name) | |
769 | (memq (aref (elt (file-attributes buffer-file-name) 8) 0) | |
770 | '(?- ?l))) | |
771 | (let ((real-file-name buffer-file-name) | |
772 | backup-info backupname targets setmodes) | |
773 | ;; If specified name is a symbolic link, chase it to the target. | |
774 | ;; Thus we make the backups in the directory where the real file is. | |
775 | (while (let ((tem (file-symlink-p real-file-name))) | |
776 | (if tem | |
777 | (setq real-file-name | |
778 | (expand-file-name tem | |
779 | (file-name-directory real-file-name)))) | |
780 | tem)) | |
781 | (setq backup-info (find-backup-file-name real-file-name) | |
782 | backupname (car backup-info) | |
783 | targets (cdr backup-info)) | |
784 | ;;; (if (file-directory-p buffer-file-name) | |
785 | ;;; (error "Cannot save buffer in directory %s" buffer-file-name)) | |
786 | (condition-case () | |
787 | (let ((delete-old-versions | |
788 | ;; If have old versions to maybe delete, | |
789 | ;; ask the user to confirm now, before doing anything. | |
790 | ;; But don't actually delete til later. | |
791 | (and targets | |
6d74b528 | 792 | (or (eq trim-versions-without-asking t) (eq trim-versions-without-asking nil)) |
b4da00e9 RM |
793 | (or trim-versions-without-asking |
794 | (y-or-n-p (format "Delete excess backup versions of %s? " | |
795 | real-file-name)))))) | |
796 | ;; Actually write the back up file. | |
797 | (condition-case () | |
798 | (if (or file-precious-flag | |
799 | ; (file-symlink-p buffer-file-name) | |
800 | backup-by-copying | |
801 | (and backup-by-copying-when-linked | |
802 | (> (file-nlinks real-file-name) 1)) | |
803 | (and backup-by-copying-when-mismatch | |
804 | (let ((attr (file-attributes real-file-name))) | |
805 | (or (nth 9 attr) | |
806 | (/= (nth 2 attr) (user-uid)))))) | |
65864ae0 RS |
807 | (condition-case () |
808 | (copy-file real-file-name backupname t t) | |
809 | (file-error | |
810 | ;; If copying fails because file BACKUPNAME | |
811 | ;; is not writable, delete that file and try again. | |
812 | (if (and (file-exists-p backupname) | |
813 | (not (file-writable-p backupname))) | |
814 | (delete-file backupname)) | |
815 | (copy-file real-file-name backupname t t))) | |
816 | ;; rename-file should delete old backup. | |
b4da00e9 RM |
817 | (rename-file real-file-name backupname t) |
818 | (setq setmodes (file-modes backupname))) | |
819 | (file-error | |
820 | ;; If trouble writing the backup, write it in ~. | |
821 | (setq backupname (expand-file-name "~/%backup%~")) | |
822 | (message "Cannot write backup file; backing up in ~/%%backup%%~") | |
823 | (sleep-for 1) | |
65864ae0 RS |
824 | (condition-case () |
825 | (copy-file real-file-name backupname t t) | |
826 | (file-error | |
827 | ;; If copying fails because file BACKUPNAME | |
828 | ;; is not writable, delete that file and try again. | |
829 | (if (and (file-exists-p backupname) | |
830 | (not (file-writable-p backupname))) | |
831 | (delete-file backupname)) | |
832 | (copy-file real-file-name backupname t t))))) | |
b4da00e9 RM |
833 | (setq buffer-backed-up t) |
834 | ;; Now delete the old versions, if desired. | |
835 | (if delete-old-versions | |
836 | (while targets | |
837 | (condition-case () | |
838 | (delete-file (car targets)) | |
839 | (file-error nil)) | |
840 | (setq targets (cdr targets)))) | |
841 | setmodes) | |
842 | (file-error nil))))) | |
843 | ||
c3554e95 | 844 | (defun file-name-sans-versions (name &optional keep-backup-version) |
b4da00e9 RM |
845 | "Return FILENAME sans backup versions or strings. |
846 | This is a separate procedure so your site-init or startup file can | |
c3554e95 RS |
847 | redefine it. |
848 | If the optional argument KEEP-BACKUP-VERSION is non-nil, | |
849 | we do not remove backup version numbers, only true file version numbers." | |
850 | (let (handler (handlers file-name-handler-alist)) | |
5d68c2c2 RS |
851 | (save-match-data |
852 | (while (and (consp handlers) (null handler)) | |
853 | (if (and (consp (car handlers)) | |
854 | (stringp (car (car handlers))) | |
855 | (string-match (car (car handlers)) name)) | |
856 | (setq handler (cdr (car handlers)))) | |
857 | (setq handlers (cdr handlers)))) | |
c3554e95 RS |
858 | (if handler |
859 | (funcall handler 'file-name-sans-versions name keep-backup-version) | |
860 | (substring name 0 | |
861 | (if (eq system-type 'vax-vms) | |
862 | ;; VMS version number is (a) semicolon, optional | |
863 | ;; sign, zero or more digits or (b) period, option | |
864 | ;; sign, zero or more digits, provided this is the | |
865 | ;; second period encountered outside of the | |
866 | ;; device/directory part of the file name. | |
867 | (or (string-match ";[---+]?[0-9]*\\'" name) | |
868 | (if (string-match "\\.[^]>:]*\\(\\.[---+]?[0-9]*\\)\\'" | |
869 | name) | |
870 | (match-beginning 1)) | |
871 | (length name)) | |
872 | (if keep-backup-version | |
873 | (length name) | |
874 | (or (string-match "\\.~[0-9]+~\\'" name) | |
875 | (string-match "~\\'" name) | |
876 | (length name)))))))) | |
b4da00e9 RM |
877 | |
878 | (defun make-backup-file-name (file) | |
879 | "Create the non-numeric backup file name for FILE. | |
880 | This is a separate function so you can redefine it for customization." | |
881 | (concat file "~")) | |
882 | ||
883 | (defun backup-file-name-p (file) | |
884 | "Return non-nil if FILE is a backup file name (numeric or not). | |
885 | This is a separate function so you can redefine it for customization. | |
886 | You may need to redefine `file-name-sans-versions' as well." | |
887 | (string-match "~$" file)) | |
888 | ||
2d051399 RS |
889 | ;; This is used in various files. |
890 | ;; The usage of bv-length is not very clean, | |
891 | ;; but I can't see a good alternative, | |
892 | ;; so as of now I am leaving it alone. | |
893 | (defun backup-extract-version (fn) | |
894 | "Given the name of a numeric backup file, return the backup number. | |
895 | Uses the free variable `bv-length', whose value should be | |
896 | the index in the name where the version number begins." | |
897 | (if (and (string-match "[0-9]+~$" fn bv-length) | |
898 | (= (match-beginning 0) bv-length)) | |
899 | (string-to-int (substring fn bv-length -1)) | |
900 | 0)) | |
901 | ||
b4da00e9 RM |
902 | ;; I believe there is no need to alter this behavior for VMS; |
903 | ;; since backup files are not made on VMS, it should not get called. | |
904 | (defun find-backup-file-name (fn) | |
905 | "Find a file name for a backup file, and suggestions for deletions. | |
906 | Value is a list whose car is the name for the backup file | |
907 | and whose cdr is a list of old versions to consider deleting now." | |
908 | (if (eq version-control 'never) | |
909 | (list (make-backup-file-name fn)) | |
910 | (let* ((base-versions (concat (file-name-nondirectory fn) ".~")) | |
911 | (bv-length (length base-versions)) | |
912 | (possibilities (file-name-all-completions | |
913 | base-versions | |
914 | (file-name-directory fn))) | |
79058860 | 915 | (versions (sort (mapcar |
2d051399 | 916 | (function backup-extract-version) |
79058860 | 917 | possibilities) |
b4da00e9 | 918 | '<)) |
5bbbceb1 | 919 | (high-water-mark (apply 'max 0 versions)) |
b4da00e9 RM |
920 | (deserve-versions-p |
921 | (or version-control | |
922 | (> high-water-mark 0))) | |
923 | (number-to-delete (- (length versions) | |
924 | kept-old-versions kept-new-versions -1))) | |
925 | (if (not deserve-versions-p) | |
926 | (list (make-backup-file-name fn)) | |
927 | (cons (concat fn ".~" (int-to-string (1+ high-water-mark)) "~") | |
928 | (if (> number-to-delete 0) | |
929 | (mapcar (function (lambda (n) | |
930 | (concat fn ".~" (int-to-string n) "~"))) | |
931 | (let ((v (nthcdr kept-old-versions versions))) | |
932 | (rplacd (nthcdr (1- number-to-delete) v) ()) | |
933 | v)))))))) | |
934 | ||
b4da00e9 RM |
935 | (defun file-nlinks (filename) |
936 | "Return number of names file FILENAME has." | |
937 | (car (cdr (file-attributes filename)))) | |
938 | \f | |
939 | (defun save-buffer (&optional args) | |
940 | "Save current buffer in visited file if modified. Versions described below. | |
941 | By default, makes the previous version into a backup file | |
942 | if previously requested or if this is the first save. | |
943 | With 1 or 3 \\[universal-argument]'s, marks this version | |
944 | to become a backup when the next save is done. | |
945 | With 2 or 3 \\[universal-argument]'s, | |
946 | unconditionally makes the previous version into a backup file. | |
947 | With argument of 0, never makes the previous version into a backup file. | |
948 | ||
949 | If a file's name is FOO, the names of its numbered backup versions are | |
950 | FOO.~i~ for various integers i. A non-numbered backup file is called FOO~. | |
951 | Numeric backups (rather than FOO~) will be made if value of | |
952 | `version-control' is not the atom `never' and either there are already | |
953 | numeric versions of the file being backed up, or `version-control' is | |
954 | non-nil. | |
955 | We don't want excessive versions piling up, so there are variables | |
956 | `kept-old-versions', which tells Emacs how many oldest versions to keep, | |
957 | and `kept-new-versions', which tells how many newest versions to keep. | |
958 | Defaults are 2 old versions and 2 new. | |
959 | `dired-kept-versions' controls dired's clean-directory (.) command. | |
960 | If `trim-versions-without-asking' is nil, system will query user | |
961 | before trimming versions. Otherwise it does it silently." | |
962 | (interactive "p") | |
963 | (let ((modp (buffer-modified-p)) | |
964 | (large (> (buffer-size) 50000)) | |
965 | (make-backup-files (and make-backup-files (not (eq args 0))))) | |
966 | (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) | |
967 | (if (and modp large) (message "Saving file %s..." (buffer-file-name))) | |
968 | (basic-save-buffer) | |
969 | (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) | |
970 | ||
971 | (defun delete-auto-save-file-if-necessary (&optional force) | |
972 | "Delete auto-save file for current buffer if `delete-auto-save-files' is t. | |
973 | Normally delete only if the file was written by this Emacs since | |
974 | the last real save, but optional arg FORCE non-nil means delete anyway." | |
975 | (and buffer-auto-save-file-name delete-auto-save-files | |
976 | (not (string= buffer-file-name buffer-auto-save-file-name)) | |
977 | (or force (recent-auto-save-p)) | |
978 | (progn | |
979 | (condition-case () | |
980 | (delete-file buffer-auto-save-file-name) | |
981 | (file-error nil)) | |
982 | (set-buffer-auto-saved)))) | |
983 | ||
984 | (defun basic-save-buffer () | |
985 | "Save the current buffer in its visited file, if it has been modified." | |
986 | (interactive) | |
987 | (if (buffer-modified-p) | |
988 | (let ((recent-save (recent-auto-save-p)) | |
989 | setmodes tempsetmodes) | |
990 | ;; On VMS, rename file and buffer to get rid of version number. | |
991 | (if (and (eq system-type 'vax-vms) | |
992 | (not (string= buffer-file-name | |
993 | (file-name-sans-versions buffer-file-name)))) | |
994 | (let (buffer-new-name) | |
995 | ;; Strip VMS version number before save. | |
996 | (setq buffer-file-name | |
997 | (file-name-sans-versions buffer-file-name)) | |
998 | ;; Construct a (unique) buffer name to correspond. | |
999 | (let ((buf (create-file-buffer (downcase buffer-file-name)))) | |
1000 | (setq buffer-new-name (buffer-name buf)) | |
1001 | (kill-buffer buf)) | |
1002 | (rename-buffer buffer-new-name))) | |
1003 | ;; If buffer has no file name, ask user for one. | |
1004 | (or buffer-file-name | |
1005 | (progn | |
1006 | (setq buffer-file-name | |
1007 | (expand-file-name (read-file-name "File to save in: ") nil) | |
1008 | default-directory (file-name-directory buffer-file-name)) | |
1009 | (auto-save-mode auto-save-default))) | |
1010 | (or (verify-visited-file-modtime (current-buffer)) | |
1011 | (not (file-exists-p buffer-file-name)) | |
1012 | (yes-or-no-p | |
1013 | (format "%s has changed since visited or saved. Save anyway? " | |
1014 | (file-name-nondirectory buffer-file-name))) | |
1015 | (error "Save not confirmed")) | |
1016 | (save-restriction | |
1017 | (widen) | |
1018 | (and (> (point-max) 1) | |
1019 | (/= (char-after (1- (point-max))) ?\n) | |
1020 | (or (eq require-final-newline t) | |
1021 | (and require-final-newline | |
1022 | (y-or-n-p | |
1023 | (format "Buffer %s does not end in newline. Add one? " | |
1024 | (buffer-name))))) | |
1025 | (save-excursion | |
1026 | (goto-char (point-max)) | |
1027 | (insert ?\n))) | |
8c0e7b73 | 1028 | (let ((hooks (append write-contents-hooks write-file-hooks)) |
b4da00e9 RM |
1029 | (done nil)) |
1030 | (while (and hooks | |
1031 | (not (setq done (funcall (car hooks))))) | |
1032 | (setq hooks (cdr hooks))) | |
1033 | ;; If a hook returned t, file is already "written". | |
1034 | (cond ((not done) | |
1035 | (if (not (file-writable-p buffer-file-name)) | |
1036 | (let ((dir (file-name-directory buffer-file-name))) | |
1037 | (if (not (file-directory-p dir)) | |
1038 | (error "%s is not a directory" dir) | |
1039 | (if (not (file-exists-p buffer-file-name)) | |
1040 | (error "Directory %s write-protected" dir) | |
1041 | (if (yes-or-no-p | |
1042 | (format "File %s is write-protected; try to save anyway? " | |
1043 | (file-name-nondirectory | |
1044 | buffer-file-name))) | |
1045 | (setq tempsetmodes t) | |
1046 | (error "Attempt to save to a file which you aren't allowed to write")))))) | |
1047 | (or buffer-backed-up | |
1048 | (setq setmodes (backup-buffer))) | |
1049 | (if file-precious-flag | |
1050 | ;; If file is precious, rename it away before | |
1051 | ;; overwriting it. | |
1052 | (let ((rename t) | |
1053 | realname tempname temp) | |
1054 | ;; Chase symlinks; rename the ultimate actual file. | |
1055 | (setq realname buffer-file-name) | |
1056 | (while (setq temp (file-symlink-p realname)) | |
1057 | (setq realname temp)) | |
1058 | (setq tempname (concat realname "#")) | |
1059 | (condition-case () | |
1060 | (progn (rename-file realname tempname t) | |
1061 | (setq setmodes (file-modes tempname))) | |
1062 | (file-error (setq rename nil tempname nil))) | |
1063 | (if (file-directory-p realname) | |
1064 | (error "%s is a directory" realname)) | |
1065 | (unwind-protect | |
1066 | (progn (clear-visited-file-modtime) | |
1067 | (write-region (point-min) (point-max) | |
1068 | realname nil t) | |
1069 | (setq rename nil)) | |
1070 | ;; If rename is still t, writing failed. | |
1071 | ;; So rename the old file back to original name, | |
1072 | (if rename | |
1073 | (progn | |
1074 | (rename-file tempname realname t) | |
1075 | (clear-visited-file-modtime)) | |
1076 | ;; Otherwise we don't need the original file, | |
1077 | ;; so flush it, if we still have it. | |
1078 | ;; If rename failed due to name length restriction | |
1079 | ;; then TEMPNAME is now nil. | |
1080 | (if tempname | |
1081 | (condition-case () | |
1082 | (delete-file tempname) | |
1083 | (error nil)))))) | |
1084 | ;; If file not writable, see if we can make it writable | |
1085 | ;; temporarily while we write it. | |
1086 | ;; But no need to do so if we have just backed it up | |
1087 | ;; (setmodes is set) because that says we're superseding. | |
1088 | (cond ((and tempsetmodes (not setmodes)) | |
1089 | ;; Change the mode back, after writing. | |
1090 | (setq setmodes (file-modes buffer-file-name)) | |
1091 | (set-file-modes buffer-file-name 511))) | |
1092 | (write-region (point-min) (point-max) | |
1093 | buffer-file-name nil t))))) | |
1094 | (if setmodes | |
1095 | (condition-case () | |
1096 | (set-file-modes buffer-file-name setmodes) | |
1097 | (error nil)))) | |
1098 | ;; If the auto-save file was recent before this command, | |
1099 | ;; delete it now. | |
1100 | (delete-auto-save-file-if-necessary recent-save) | |
1101 | (run-hooks 'after-save-hooks)) | |
1102 | (message "(No changes need to be saved)"))) | |
1103 | ||
b4da00e9 RM |
1104 | (defun save-some-buffers (&optional arg exiting) |
1105 | "Save some modified file-visiting buffers. Asks user about each one. | |
5bbbceb1 JB |
1106 | Optional argument (the prefix) non-nil means save all with no questions. |
1107 | Optional second argument EXITING means ask about certain non-file buffers | |
1108 | as well as about file buffers." | |
b4da00e9 | 1109 | (interactive "P") |
907482b9 | 1110 | (save-window-excursion |
b5e86cb3 RM |
1111 | (if (zerop (map-y-or-n-p |
1112 | (function | |
1113 | (lambda (buffer) | |
1114 | (and (buffer-modified-p buffer) | |
1115 | (or | |
1116 | (buffer-file-name buffer) | |
1117 | (and exiting | |
1118 | (progn | |
1119 | (set-buffer buffer) | |
1120 | (and buffer-offer-save (> (buffer-size) 0))))) | |
1121 | (if arg | |
1122 | t | |
1123 | (if (buffer-file-name buffer) | |
1124 | (format "Save file %s? " | |
1125 | (buffer-file-name buffer)) | |
1126 | (format "Save buffer %s? " | |
1127 | (buffer-name buffer))))))) | |
1128 | (function | |
1129 | (lambda (buffer) | |
e065a56e JB |
1130 | (set-buffer buffer) |
1131 | (save-buffer))) | |
b5e86cb3 | 1132 | (buffer-list) |
907482b9 | 1133 | '("buffer" "buffers" "save") |
df01170b RS |
1134 | (list (list ?\C-r (lambda (buf) |
1135 | (view-buffer buf) | |
1586b965 RS |
1136 | (setq view-exit-action |
1137 | '(lambda (ignore) | |
1138 | (exit-recursive-edit))) | |
df01170b RS |
1139 | (recursive-edit) |
1140 | ;; Return nil to ask about BUF again. | |
1141 | nil) | |
907482b9 RM |
1142 | "display the current buffer")) |
1143 | )) | |
b5e86cb3 | 1144 | (message "(No files need saving)")))) |
b4da00e9 RM |
1145 | \f |
1146 | (defun not-modified (&optional arg) | |
1147 | "Mark current buffer as unmodified, not needing to be saved. | |
1148 | With prefix arg, mark buffer as modified, so \\[save-buffer] will save." | |
1149 | (interactive "P") | |
1150 | (message (if arg "Modification-flag set" | |
1151 | "Modification-flag cleared")) | |
1152 | (set-buffer-modified-p arg)) | |
1153 | ||
1154 | (defun toggle-read-only (&optional arg) | |
1155 | "Change whether this buffer is visiting its file read-only. | |
1156 | With arg, set read-only iff arg is positive." | |
1157 | (interactive "P") | |
1158 | (setq buffer-read-only | |
1159 | (if (null arg) | |
1160 | (not buffer-read-only) | |
1161 | (> (prefix-numeric-value arg) 0))) | |
1162 | ;; Force mode-line redisplay | |
1163 | (set-buffer-modified-p (buffer-modified-p))) | |
1164 | ||
1165 | (defun insert-file (filename) | |
1166 | "Insert contents of file FILENAME into buffer after point. | |
1167 | Set mark after the inserted text. | |
1168 | ||
1169 | This function is meant for the user to run interactively. | |
1170 | Don't call it from programs! Use `insert-file-contents' instead. | |
1171 | \(Its calling sequence is different; see its documentation)." | |
1172 | (interactive "fInsert file: ") | |
1173 | (let ((tem (insert-file-contents filename))) | |
1174 | (push-mark (+ (point) (car (cdr tem)))))) | |
1175 | ||
1176 | (defun append-to-file (start end filename) | |
1177 | "Append the contents of the region to the end of file FILENAME. | |
1178 | When called from a function, expects three arguments, | |
1179 | START, END and FILENAME. START and END are buffer positions | |
1180 | saying what text to write." | |
1181 | (interactive "r\nFAppend to file: ") | |
1182 | (write-region start end filename t)) | |
1183 | ||
1184 | (defun file-newest-backup (filename) | |
1185 | "Return most recent backup file for FILENAME or nil if no backups exist." | |
1186 | (let* ((filename (expand-file-name filename)) | |
1187 | (file (file-name-nondirectory filename)) | |
1188 | (dir (file-name-directory filename)) | |
1189 | (comp (file-name-all-completions file dir)) | |
1190 | newest) | |
1191 | (while comp | |
1192 | (setq file (concat dir (car comp)) | |
1193 | comp (cdr comp)) | |
1194 | (if (and (backup-file-name-p file) | |
1195 | (or (null newest) (file-newer-than-file-p file newest))) | |
1196 | (setq newest file))) | |
1197 | newest)) | |
1198 | ||
1199 | (defun rename-uniquely () | |
1200 | "Rename current buffer to a similar name not already taken. | |
1201 | This function is useful for creating multiple shell process buffers | |
1202 | or multiple mail buffers, etc." | |
1203 | (interactive) | |
1204 | (let* ((new-buf (generate-new-buffer (buffer-name))) | |
1205 | (name (buffer-name new-buf))) | |
1206 | (kill-buffer new-buf) | |
1207 | (rename-buffer name) | |
1208 | (set-buffer-modified-p (buffer-modified-p)))) ; force mode line update | |
5bbbceb1 JB |
1209 | |
1210 | (defun make-directory-path (path) | |
1211 | "Create all the directories along path that don't exist yet." | |
1212 | (interactive "Fdirectory path to create: ") | |
1213 | (let ((path (directory-file-name (expand-file-name path))) | |
1214 | create-list) | |
1215 | (while (not (file-exists-p path)) | |
1216 | (setq create-list (cons path create-list) | |
1217 | path (directory-file-name (file-name-directory path)))) | |
1218 | (while create-list | |
1219 | (make-directory (car create-list)) | |
1220 | (setq create-list (cdr create-list))))) | |
1221 | ||
b4da00e9 RM |
1222 | \f |
1223 | (put 'revert-buffer-function 'permanent-local t) | |
1224 | (defvar revert-buffer-function nil | |
1225 | "Function to use to revert this buffer, or nil to do the default.") | |
1226 | ||
1227 | (put 'revert-buffer-insert-file-contents-function 'permanent-local t) | |
1228 | (defvar revert-buffer-insert-file-contents-function nil | |
1229 | "Function to use to insert contents when reverting this buffer. | |
1230 | Gets two args, first the nominal file name to use, | |
1231 | and second, t if reading the auto-save file.") | |
1232 | ||
8c0e7b73 | 1233 | (defun revert-buffer (&optional check-auto noconfirm) |
b4da00e9 RM |
1234 | "Replace the buffer text with the text of the visited file on disk. |
1235 | This undoes all changes since the file was visited or saved. | |
8c0e7b73 JB |
1236 | With a prefix argument, offer to revert from latest auto-save file, if |
1237 | that is more recent than the visited file. | |
1238 | When called from lisp, this is the first argument, CHECK-AUTO; it is optional. | |
b4da00e9 RM |
1239 | Optional second argument NOCONFIRM means don't ask for confirmation at all. |
1240 | ||
8c0e7b73 JB |
1241 | If the value of `revert-buffer-function' is non-nil, it is called to |
1242 | do the work." | |
b4da00e9 RM |
1243 | (interactive "P") |
1244 | (if revert-buffer-function | |
8c0e7b73 | 1245 | (funcall revert-buffer-function (not check-auto) noconfirm) |
b4da00e9 | 1246 | (let* ((opoint (point)) |
8c0e7b73 | 1247 | (auto-save-p (and check-auto (recent-auto-save-p) |
b4da00e9 RM |
1248 | buffer-auto-save-file-name |
1249 | (file-readable-p buffer-auto-save-file-name) | |
1250 | (y-or-n-p | |
1251 | "Buffer has been auto-saved recently. Revert from auto-save file? "))) | |
1252 | (file-name (if auto-save-p | |
1253 | buffer-auto-save-file-name | |
1254 | buffer-file-name))) | |
1255 | (cond ((null file-name) | |
1256 | (error "Buffer does not seem to be associated with any file")) | |
1257 | ((or noconfirm | |
1258 | (yes-or-no-p (format "Revert buffer from file %s? " | |
1259 | file-name))) | |
1260 | ;; If file was backed up but has changed since, | |
1261 | ;; we shd make another backup. | |
1262 | (and (not auto-save-p) | |
5bbbceb1 | 1263 | (not (verify-visited-file-modtime (current-buffer))) |
b4da00e9 RM |
1264 | (setq buffer-backed-up nil)) |
1265 | ;; Get rid of all undo records for this buffer. | |
1266 | (or (eq buffer-undo-list t) | |
1267 | (setq buffer-undo-list nil)) | |
1268 | (let ((buffer-read-only nil) | |
1269 | ;; Don't make undo records for the reversion. | |
1270 | (buffer-undo-list t)) | |
1271 | (if revert-buffer-insert-file-contents-function | |
1272 | (funcall revert-buffer-insert-file-contents-function | |
1273 | file-name auto-save-p) | |
1274 | (if (not (file-exists-p file-name)) | |
1275 | (error "File %s no longer exists!" file-name)) | |
1276 | ;; Bind buffer-file-name to nil | |
1277 | ;; so that we don't try to lock the file. | |
1278 | (let ((buffer-file-name nil)) | |
1279 | (or auto-save-p | |
1280 | (unlock-buffer)) | |
1281 | (erase-buffer)) | |
1282 | (insert-file-contents file-name (not auto-save-p)))) | |
1283 | (goto-char (min opoint (point-max))) | |
1284 | (after-find-file nil) | |
1285 | t))))) | |
1286 | ||
1287 | (defun recover-file (file) | |
1288 | "Visit file FILE, but get contents from its last auto-save file." | |
1289 | (interactive | |
1290 | (let ((prompt-file buffer-file-name) | |
1291 | (file-name nil) | |
1292 | (file-dir nil)) | |
1293 | (and prompt-file | |
1294 | (setq file-name (file-name-nondirectory prompt-file) | |
1295 | file-dir (file-name-directory prompt-file))) | |
1296 | (list (read-file-name "Recover file: " | |
1297 | file-dir nil nil file-name)))) | |
1298 | (setq file (expand-file-name file)) | |
1299 | (if (auto-save-file-name-p file) (error "%s is an auto-save file" file)) | |
1300 | (let ((file-name (let ((buffer-file-name file)) | |
1301 | (make-auto-save-file-name)))) | |
1302 | (cond ((not (file-newer-than-file-p file-name file)) | |
1303 | (error "Auto-save file %s not current" file-name)) | |
1304 | ((save-window-excursion | |
1305 | (if (not (eq system-type 'vax-vms)) | |
1306 | (with-output-to-temp-buffer "*Directory*" | |
1307 | (buffer-disable-undo standard-output) | |
1308 | (call-process "ls" nil standard-output nil | |
2dc2b736 RS |
1309 | (if (file-symlink-p file) "-lL" "-l") |
1310 | file file-name))) | |
b4da00e9 RM |
1311 | (yes-or-no-p (format "Recover auto save file %s? " file-name))) |
1312 | (switch-to-buffer (find-file-noselect file t)) | |
1313 | (let ((buffer-read-only nil)) | |
1314 | (erase-buffer) | |
1315 | (insert-file-contents file-name nil)) | |
1316 | (after-find-file nil)) | |
1317 | (t (error "Recover-file cancelled."))))) | |
1318 | ||
1319 | (defun kill-some-buffers () | |
1320 | "For each buffer, ask whether to kill it." | |
1321 | (interactive) | |
1322 | (let ((list (buffer-list))) | |
1323 | (while list | |
1324 | (let* ((buffer (car list)) | |
1325 | (name (buffer-name buffer))) | |
1326 | (and (not (string-equal name "")) | |
1327 | (/= (aref name 0) ? ) | |
1328 | (yes-or-no-p | |
1329 | (format "Buffer %s %s. Kill? " | |
1330 | name | |
1331 | (if (buffer-modified-p buffer) | |
1332 | "HAS BEEN EDITED" "is unmodified"))) | |
1333 | (kill-buffer buffer))) | |
1334 | (setq list (cdr list))))) | |
1335 | \f | |
1336 | (defun auto-save-mode (arg) | |
1337 | "Toggle auto-saving of contents of current buffer. | |
1338 | With ARG, turn auto-saving on if positive, else off." | |
1339 | (interactive "P") | |
1340 | (setq buffer-auto-save-file-name | |
1341 | (and (if (null arg) | |
1342 | (not buffer-auto-save-file-name) | |
1343 | (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) | |
1344 | (if (and buffer-file-name auto-save-visited-file-name | |
1345 | (not buffer-read-only)) | |
1346 | buffer-file-name | |
1347 | (make-auto-save-file-name)))) | |
1348 | (if (interactive-p) | |
1349 | (message "Auto-save %s (in this buffer)" | |
1350 | (if buffer-auto-save-file-name "on" "off"))) | |
1351 | buffer-auto-save-file-name) | |
1352 | ||
1353 | (defun rename-auto-save-file () | |
1354 | "Adjust current buffer's auto save file name for current conditions. | |
1355 | Also rename any existing auto save file, if it was made in this session." | |
1356 | (let ((osave buffer-auto-save-file-name)) | |
1357 | (setq buffer-auto-save-file-name | |
1358 | (make-auto-save-file-name)) | |
1359 | (if (and osave buffer-auto-save-file-name | |
1360 | (not (string= buffer-auto-save-file-name buffer-file-name)) | |
1361 | (not (string= buffer-auto-save-file-name osave)) | |
1362 | (file-exists-p osave) | |
1363 | (recent-auto-save-p)) | |
1364 | (rename-file osave buffer-auto-save-file-name t)))) | |
1365 | ||
1366 | (defun make-auto-save-file-name () | |
1367 | "Return file name to use for auto-saves of current buffer. | |
1368 | Does not consider `auto-save-visited-file-name' as that variable is checked | |
1369 | before calling this function. You can redefine this for customization. | |
1370 | See also `auto-save-file-name-p'." | |
1371 | (if buffer-file-name | |
1372 | (concat (file-name-directory buffer-file-name) | |
1373 | "#" | |
1374 | (file-name-nondirectory buffer-file-name) | |
1375 | "#") | |
1376 | ;; For non-file bfr, use bfr name and Emacs pid. | |
1377 | (expand-file-name (format "#%s#%s#" (buffer-name) (make-temp-name ""))))) | |
1378 | ||
1379 | (defun auto-save-file-name-p (filename) | |
1380 | "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'. | |
1381 | FILENAME should lack slashes. You can redefine this for customization." | |
1382 | (string-match "^#.*#$" filename)) | |
1383 | \f | |
1384 | (defconst list-directory-brief-switches | |
1385 | (if (eq system-type 'vax-vms) "" "-CF") | |
1386 | "*Switches for list-directory to pass to `ls' for brief listing,") | |
1387 | ||
1388 | (defconst list-directory-verbose-switches | |
1389 | (if (eq system-type 'vax-vms) | |
1390 | "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)" | |
1391 | "-l") | |
1392 | "*Switches for list-directory to pass to `ls' for verbose listing,") | |
1393 | ||
1394 | (defun list-directory (dirname &optional verbose) | |
1395 | "Display a list of files in or matching DIRNAME, a la `ls'. | |
1396 | DIRNAME is globbed by the shell if necessary. | |
1397 | Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. | |
1398 | Actions controlled by variables `list-directory-brief-switches' | |
1399 | and `list-directory-verbose-switches'." | |
1400 | (interactive (let ((pfx current-prefix-arg)) | |
1401 | (list (read-file-name (if pfx "List directory (verbose): " | |
1402 | "List directory (brief): ") | |
1403 | nil default-directory nil) | |
1404 | pfx))) | |
1405 | (let ((switches (if verbose list-directory-verbose-switches | |
1406 | list-directory-brief-switches))) | |
1407 | (or dirname (setq dirname default-directory)) | |
1408 | (setq dirname (expand-file-name dirname)) | |
1409 | (with-output-to-temp-buffer "*Directory*" | |
1410 | (buffer-disable-undo standard-output) | |
1411 | (princ "Directory ") | |
1412 | (princ dirname) | |
1413 | (terpri) | |
c3554e95 RS |
1414 | (save-excursion |
1415 | (set-buffer "*Directory*") | |
1416 | (let ((wildcard (not (file-directory-p dirname)))) | |
1417 | (insert-directory dirname switches wildcard (not wildcard))))))) | |
1418 | ||
1419 | (defvar insert-directory-program "ls" | |
1420 | "Absolute or relative name of the `ls' program used by `insert-directory'.") | |
1421 | ||
1422 | ;; insert-directory | |
1423 | ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and | |
1424 | ;; FULL-DIRECTORY-P is nil. | |
1425 | ;; The single line of output must display FILE's name as it was | |
1426 | ;; given, namely, an absolute path name. | |
1427 | ;; - must insert exactly one line for each file if WILDCARD or | |
1428 | ;; FULL-DIRECTORY-P is t, plus one optional "total" line | |
1429 | ;; before the file lines, plus optional text after the file lines. | |
1430 | ;; Lines are delimited by "\n", so filenames containing "\n" are not | |
1431 | ;; allowed. | |
1432 | ;; File lines should display the basename. | |
1433 | ;; - must be consistent with | |
1434 | ;; - functions dired-move-to-filename, (these two define what a file line is) | |
1435 | ;; dired-move-to-end-of-filename, | |
1436 | ;; dired-between-files, (shortcut for (not (dired-move-to-filename))) | |
1437 | ;; dired-insert-headerline | |
1438 | ;; dired-after-subdir-garbage (defines what a "total" line is) | |
1439 | ;; - variable dired-subdir-regexp | |
1440 | (defun insert-directory (file switches &optional wildcard full-directory-p) | |
1441 | "Insert directory listing for of FILE, formatted according to SWITCHES. | |
1442 | Leaves point after the inserted text. | |
1443 | Optional third arg WILDCARD means treat FILE as shell wildcard. | |
1444 | Optional fourth arg FULL-DIRECTORY-P means file is a directory and | |
1445 | switches do not contain `d', so that a full listing is expected. | |
1446 | ||
1447 | This works by running a directory listing program | |
1448 | whose name is in the variable `ls-program'. | |
1449 | If WILDCARD, it also runs the shell specified by `shell-file-name'." | |
1450 | (let (handler (handlers file-name-handler-alist)) | |
5d68c2c2 RS |
1451 | (save-match-data |
1452 | (while (and (consp handlers) (null handler)) | |
1453 | (if (and (consp (car handlers)) | |
1454 | (stringp (car (car handlers))) | |
1455 | (string-match (car (car handlers)) file)) | |
1456 | (setq handler (cdr (car handlers)))) | |
1457 | (setq handlers (cdr handlers)))) | |
c3554e95 RS |
1458 | (if handler |
1459 | (funcall handler 'insert-directory file switches | |
1460 | wildcard full-directory-p) | |
b4da00e9 | 1461 | (if (eq system-type 'vax-vms) |
c3554e95 RS |
1462 | (vms-read-directory file switches (current-buffer)) |
1463 | (if wildcard | |
1464 | (let ((default-directory (file-name-directory file))) | |
1465 | (call-process shell-file-name nil t nil | |
1466 | "-c" (concat insert-directory-program | |
1467 | " -d " switches " " | |
1468 | (file-name-nondirectory file)))) | |
ec8be6da RS |
1469 | ;;; ;; Chase links till we reach a non-link. |
1470 | ;;; (let (symlink) | |
1471 | ;;; (while (setq symlink (file-symlink-p file)) | |
1472 | ;;; (setq file symlink))) | |
c3554e95 | 1473 | (call-process insert-directory-program nil t nil switches file)))))) |
b4da00e9 RM |
1474 | |
1475 | (defun save-buffers-kill-emacs (&optional arg) | |
1476 | "Offer to save each buffer, then kill this Emacs process. | |
1477 | With prefix arg, silently save all file-visiting buffers, then kill." | |
1478 | (interactive "P") | |
1479 | (save-some-buffers arg t) | |
1480 | (and (or (not (memq t (mapcar (function | |
1481 | (lambda (buf) (and (buffer-file-name buf) | |
1482 | (buffer-modified-p buf)))) | |
1483 | (buffer-list)))) | |
1484 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) | |
1485 | (or (not (fboundp 'process-list)) | |
1486 | ;; process-list is not defined on VMS. | |
1487 | (let ((processes (process-list)) | |
1488 | active) | |
1489 | (while processes | |
528415e7 | 1490 | (and (memq (process-status (car processes)) '(run stop open)) |
b4da00e9 RM |
1491 | (let ((val (process-kill-without-query (car processes)))) |
1492 | (process-kill-without-query (car processes) val) | |
1493 | val) | |
1494 | (setq active t)) | |
1495 | (setq processes (cdr processes))) | |
1496 | (or (not active) | |
1497 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) | |
1498 | (kill-emacs))) | |
1499 | \f | |
1500 | (define-key ctl-x-map "\C-f" 'find-file) | |
1501 | (define-key ctl-x-map "\C-q" 'toggle-read-only) | |
1502 | (define-key ctl-x-map "\C-r" 'find-file-read-only) | |
1503 | (define-key ctl-x-map "\C-v" 'find-alternate-file) | |
1504 | (define-key ctl-x-map "\C-s" 'save-buffer) | |
1505 | (define-key ctl-x-map "s" 'save-some-buffers) | |
1506 | (define-key ctl-x-map "\C-w" 'write-file) | |
1507 | (define-key ctl-x-map "i" 'insert-file) | |
1508 | (define-key esc-map "~" 'not-modified) | |
1509 | (define-key ctl-x-map "\C-d" 'list-directory) | |
1510 | (define-key ctl-x-map "\C-c" 'save-buffers-kill-emacs) | |
1511 | ||
1512 | (define-key ctl-x-4-map "f" 'find-file-other-window) | |
1513 | (define-key ctl-x-4-map "r" 'find-file-read-only-other-window) | |
1514 | (define-key ctl-x-4-map "\C-f" 'find-file-other-window) | |
1515 | (define-key ctl-x-4-map "b" 'switch-to-buffer-other-window) | |
924f0a24 | 1516 | (define-key ctl-x-4-map "\C-o" 'display-buffer) |
5bbbceb1 | 1517 | |
f98955ea JB |
1518 | (define-key ctl-x-5-map "b" 'switch-to-buffer-other-frame) |
1519 | (define-key ctl-x-5-map "f" 'find-file-other-frame) | |
1520 | (define-key ctl-x-5-map "\C-f" 'find-file-other-frame) | |
1521 | (define-key ctl-x-5-map "r" 'find-file-read-only-other-frame) | |
c0274f38 ER |
1522 | |
1523 | ;;; files.el ends here |