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c88ab9ce | 1 | ;;; tar-mode.el --- simple editing of tar files from GNU emacs |
aa73f29c | 2 | |
0d30b337 | 3 | ;; Copyright (C) 1990, 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
114f9c96 | 4 | ;; 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
597e2240 | 5 | ;; Free Software Foundation, Inc. |
eea8d4ef | 6 | |
22a89ee8 | 7 | ;; Author: Jamie Zawinski <jwz@lucid.com> |
54138c9d | 8 | ;; Maintainer: FSF |
e5167999 | 9 | ;; Created: 04 Apr 1990 |
d7b4d18f | 10 | ;; Keywords: unix |
aa73f29c | 11 | |
b578f267 EN |
12 | ;; This file is part of GNU Emacs. |
13 | ||
eb3fa2cf | 14 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
b578f267 | 15 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
16 | ;; the Free Software Foundation, either version 3 of the License, or |
17 | ;; (at your option) any later version. | |
b578f267 EN |
18 | |
19 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
20 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | ;; GNU General Public License for more details. | |
23 | ||
24 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 25 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
aa73f29c | 26 | |
22a89ee8 ER |
27 | ;;; Commentary: |
28 | ||
b578f267 EN |
29 | ;; This package attempts to make dealing with Unix 'tar' archives easier. |
30 | ;; When this code is loaded, visiting a file whose name ends in '.tar' will | |
31 | ;; cause the contents of that archive file to be displayed in a Dired-like | |
32 | ;; listing. It is then possible to use the customary Dired keybindings to | |
33 | ;; extract sub-files from that archive, either by reading them into their own | |
34 | ;; editor buffers, or by copying them directly to arbitrary files on disk. | |
35 | ;; It is also possible to delete sub-files from within the tar file and write | |
36 | ;; the modified archive back to disk, or to edit sub-files within the archive | |
37 | ;; and re-insert the modified files into the archive. See the documentation | |
38 | ;; string of tar-mode for more info. | |
39 | ||
40 | ;; This code now understands the extra fields that GNU tar adds to tar files. | |
41 | ||
42 | ;; This interacts correctly with "uncompress.el" in the Emacs library, | |
f1180544 | 43 | ;; which you get with |
b578f267 EN |
44 | ;; |
45 | ;; (autoload 'uncompress-while-visiting "uncompress") | |
46 | ;; (setq auto-mode-alist (cons '("\\.Z$" . uncompress-while-visiting) | |
47 | ;; auto-mode-alist)) | |
48 | ;; | |
49 | ;; Do not attempt to use tar-mode.el with crypt.el, you will lose. | |
50 | ||
f1180544 | 51 | ;; *************** TO DO *************** |
b578f267 EN |
52 | ;; |
53 | ;; o chmod should understand "a+x,og-w". | |
54 | ;; | |
f1180544 | 55 | ;; o It's not possible to add a NEW file to a tar archive; not that |
b578f267 EN |
56 | ;; important, but still... |
57 | ;; | |
58 | ;; o The code is less efficient that it could be - in a lot of places, I | |
59 | ;; pull a 512-character string out of the buffer and parse it, when I could | |
60 | ;; be parsing it in place, not garbaging a string. Should redo that. | |
61 | ;; | |
62 | ;; o I'd like a command that searches for a string/regexp in every subfile | |
63 | ;; of an archive, where <esc> would leave you in a subfile-edit buffer. | |
64 | ;; (Like the Meta-R command of the Zmacs mail reader.) | |
65 | ;; | |
f1180544 | 66 | ;; o Sometimes (but not always) reverting the tar-file buffer does not |
b578f267 EN |
67 | ;; re-grind the listing, and you are staring at the binary tar data. |
68 | ;; Typing 'g' again immediately after that will always revert and re-grind | |
69 | ;; it, though. I have no idea why this happens. | |
70 | ;; | |
71 | ;; o Tar-mode interacts poorly with crypt.el and zcat.el because the tar | |
72 | ;; write-file-hook actually writes the file. Instead it should remove the | |
73 | ;; header (and conspire to put it back afterwards) so that other write-file | |
74 | ;; hooks which frob the buffer have a chance to do their dirty work. There | |
75 | ;; might be a problem if the tar write-file-hook does not come *first* on | |
76 | ;; the list. | |
77 | ;; | |
f1180544 | 78 | ;; o Block files, sparse files, continuation files, and the various header |
b578f267 EN |
79 | ;; types aren't editable. Actually I don't know that they work at all. |
80 | ||
81 | ;; Rationale: | |
82 | ||
83 | ;; Why does tar-mode edit the file itself instead of using tar? | |
84 | ||
85 | ;; That means that you can edit tar files which you don't have room for | |
86 | ;; on your local disk. | |
87 | ||
88 | ;; I don't know about recent features in gnu tar, but old versions of tar | |
89 | ;; can't replace a file in the middle of a tar file with a new version. | |
90 | ;; Tar-mode can. I don't think tar can do things like chmod the subfiles. | |
91 | ;; An implementation which involved unpacking and repacking the file into | |
92 | ;; some scratch directory would be very wasteful, and wouldn't be able to | |
93 | ;; preserve the file owners. | |
ce210066 | 94 | |
f598e45e SM |
95 | ;;; Bugs: |
96 | ||
58d6a142 | 97 | ;; - Rename on ././@LongLink files |
f598e45e | 98 | ;; - Revert confirmation displays the raw data temporarily. |
f598e45e | 99 | |
22a89ee8 ER |
100 | ;;; Code: |
101 | ||
f598e45e SM |
102 | (eval-when-compile (require 'cl)) |
103 | ||
b4dd2e66 SE |
104 | (defgroup tar nil |
105 | "Simple editing of tar files." | |
106 | :prefix "tar-" | |
107 | :group 'data) | |
108 | ||
109 | (defcustom tar-anal-blocksize 20 | |
8560523d | 110 | "The blocksize of tar files written by Emacs, or nil, meaning don't care. |
aa73f29c | 111 | The blocksize of a tar file is not really the size of the blocks; rather, it is |
f1180544 | 112 | the number of blocks written with one system call. When tarring to a tape, |
aa73f29c RS |
113 | this is the size of the *tape* blocks, but when writing to a file, it doesn't |
114 | matter much. The only noticeable difference is that if a tar file does not | |
115 | have a blocksize of 20, tar will tell you that; all this really controls is | |
b4dd2e66 SE |
116 | how many null padding bytes go on the end of the tar file." |
117 | :type '(choice integer (const nil)) | |
118 | :group 'tar) | |
aa73f29c | 119 | |
b4dd2e66 | 120 | (defcustom tar-update-datestamp nil |
8560523d | 121 | "Non-nil means Tar mode should play fast and loose with sub-file datestamps. |
30712209 | 122 | If this is true, then editing and saving a tar file entry back into its |
aa73f29c RS |
123 | tar file will update its datestamp. If false, the datestamp is unchanged. |
124 | You may or may not want this - it is good in that you can tell when a file | |
125 | in a tar archive has been changed, but it is bad for the same reason that | |
f1180544 | 126 | editing a file in the tar archive at all is bad - the changed version of |
b4dd2e66 SE |
127 | the file never exists on disk." |
128 | :type 'boolean | |
129 | :group 'tar) | |
aa73f29c | 130 | |
b4dd2e66 | 131 | (defcustom tar-mode-show-date nil |
8560523d | 132 | "Non-nil means Tar mode should show the date/time of each subfile. |
b4dd2e66 SE |
133 | This information is useful, but it takes screen space away from file names." |
134 | :type 'boolean | |
135 | :group 'tar) | |
30712209 | 136 | |
0f8becaa | 137 | (defvar tar-parse-info nil) |
0f8becaa ER |
138 | (defvar tar-superior-buffer nil) |
139 | (defvar tar-superior-descriptor nil) | |
d26e6665 | 140 | (defvar tar-file-name-coding-system nil) |
1c0b3743 | 141 | |
1c0b3743 RS |
142 | (put 'tar-superior-buffer 'permanent-local t) |
143 | (put 'tar-superior-descriptor 'permanent-local t) | |
f598e45e SM |
144 | |
145 | ;; The Tar data is made up of bytes and better manipulated as bytes | |
146 | ;; and can be very large, so insert/delete can be costly. The summary we | |
147 | ;; want to display may contain non-ascci chars, of course, so we'd like it | |
148 | ;; to be multibyte. We used to keep both in the same buffer and switch | |
149 | ;; from/to uni/multibyte. But this had several downsides: | |
150 | ;; - set-buffer-multibyte has an O(N^2) worst case that tends to be triggered | |
151 | ;; here, so it gets atrociously slow on large Tar files. | |
152 | ;; - need to widen/narrow the buffer to show/hide the raw data, and need to | |
153 | ;; maintain a tar-header-offset that keeps track of the boundary between | |
154 | ;; the two. | |
155 | ;; - can't use markers because they're not preserved by set-buffer-multibyte. | |
156 | ;; So instead, we now keep the two pieces of data in separate buffers, and | |
157 | ;; use the new buffer-swap-text primitive when we need to change which data | |
158 | ;; is associated with "the" buffer. | |
159 | (defvar tar-data-buffer nil "Buffer that holds the actual raw tar bytes.") | |
160 | (make-variable-buffer-local 'tar-data-buffer) | |
161 | ||
19eb68d0 SM |
162 | (defvar tar-data-swapped nil |
163 | "If non-nil, `tar-data-buffer' indeed holds raw tar bytes.") | |
164 | (make-variable-buffer-local 'tar-data-swapped) | |
165 | ||
f598e45e SM |
166 | (defun tar-data-swapped-p () |
167 | "Return non-nil if the tar-data is in `tar-data-buffer'." | |
19eb68d0 SM |
168 | (and (buffer-live-p tar-data-buffer) |
169 | ;; Sanity check to try and make sure tar-data-swapped tracks the swap | |
170 | ;; state correctly: the raw data is expected to be always larger than | |
171 | ;; the summary. | |
172 | (progn | |
4062011e SM |
173 | (assert (or (= (buffer-size tar-data-buffer) (buffer-size)) |
174 | (eq tar-data-swapped | |
175 | (> (buffer-size tar-data-buffer) (buffer-size))))) | |
19eb68d0 | 176 | tar-data-swapped))) |
d3a36099 AS |
177 | |
178 | (defun tar-swap-data () | |
179 | "Swap buffer contents between current buffer and `tar-data-buffer'. | |
180 | Preserve the modified states of the buffers and set `buffer-swapped-with'." | |
181 | (let ((data-buffer-modified-p (buffer-modified-p tar-data-buffer)) | |
182 | (current-buffer-modified-p (buffer-modified-p))) | |
183 | (buffer-swap-text tar-data-buffer) | |
19eb68d0 SM |
184 | (setq tar-data-swapped (not tar-data-swapped)) |
185 | (restore-buffer-modified-p data-buffer-modified-p) | |
d3a36099 | 186 | (with-current-buffer tar-data-buffer |
19eb68d0 | 187 | (restore-buffer-modified-p current-buffer-modified-p)))) |
aa73f29c | 188 | \f |
aa73f29c RS |
189 | ;;; down to business. |
190 | ||
61bb55d0 SM |
191 | (defstruct (tar-header |
192 | (:constructor nil) | |
193 | (:type vector) | |
194 | :named | |
195 | (:constructor | |
196 | make-tar-header (data-start name mode uid gid size date checksum | |
197 | link-type link-name magic uname gname dmaj dmin))) | |
198 | data-start name mode uid gid size date checksum link-type link-name | |
58d6a142 SM |
199 | magic uname gname dmaj dmin |
200 | ;; Start of the header can be nil (meaning it's 512 bytes before data-start) | |
201 | ;; or a marker (in case the header uses LongLink thingies). | |
202 | header-start) | |
aa73f29c RS |
203 | |
204 | (defconst tar-name-offset 0) | |
205 | (defconst tar-mode-offset (+ tar-name-offset 100)) | |
206 | (defconst tar-uid-offset (+ tar-mode-offset 8)) | |
207 | (defconst tar-gid-offset (+ tar-uid-offset 8)) | |
208 | (defconst tar-size-offset (+ tar-gid-offset 8)) | |
209 | (defconst tar-time-offset (+ tar-size-offset 12)) | |
210 | (defconst tar-chk-offset (+ tar-time-offset 12)) | |
211 | (defconst tar-linkp-offset (+ tar-chk-offset 8)) | |
212 | (defconst tar-link-offset (+ tar-linkp-offset 1)) | |
213 | ;;; GNU-tar specific slots. | |
214 | (defconst tar-magic-offset (+ tar-link-offset 100)) | |
215 | (defconst tar-uname-offset (+ tar-magic-offset 8)) | |
216 | (defconst tar-gname-offset (+ tar-uname-offset 32)) | |
217 | (defconst tar-dmaj-offset (+ tar-gname-offset 32)) | |
218 | (defconst tar-dmin-offset (+ tar-dmaj-offset 8)) | |
034e32b0 JL |
219 | (defconst tar-prefix-offset (+ tar-dmin-offset 8)) |
220 | (defconst tar-end-offset (+ tar-prefix-offset 155)) | |
aa73f29c | 221 | |
61bb55d0 SM |
222 | (defun tar-roundup-512 (s) |
223 | "Round S up to the next multiple of 512." | |
224 | (ash (ash (+ s 511) -9) 9)) | |
225 | ||
d3a36099 | 226 | (defun tar-header-block-tokenize (pos coding) |
e865c5ce | 227 | "Return a `tar-header' structure. |
f1180544 | 228 | This is a list of name, mode, uid, gid, size, |
e865c5ce | 229 | write-date, checksum, link-type, and link-name." |
dc4e3ccc | 230 | (if (> (+ pos 512) (point-max)) (error "Malformed Tar header")) |
61bb55d0 SM |
231 | (assert (zerop (mod (- pos (point-min)) 512))) |
232 | (assert (not enable-multibyte-characters)) | |
233 | (let ((string (buffer-substring pos (setq pos (+ pos 512))))) | |
234 | (when ;(some 'plusp string) ; <-- oops, massive cycle hog! | |
235 | (or (not (= 0 (aref string 0))) ; This will do. | |
236 | (not (= 0 (aref string 101)))) | |
237 | (let* ((name-end tar-mode-offset) | |
238 | (link-end (1- tar-magic-offset)) | |
239 | (uname-end (1- tar-gname-offset)) | |
240 | (gname-end (1- tar-dmaj-offset)) | |
241 | (link-p (aref string tar-linkp-offset)) | |
242 | (magic-str (substring string tar-magic-offset | |
64ac1266 SM |
243 | ;; The magic string is actually 6bytes |
244 | ;; of magic string plus 2bytes of version | |
245 | ;; which we here ignore. | |
246 | (- tar-uname-offset 2))) | |
247 | ;; The magic string is "ustar\0" for POSIX format, and | |
248 | ;; "ustar " for GNU Tar's format. | |
249 | (uname-valid-p (car (member magic-str '("ustar " "ustar\0")))) | |
61bb55d0 SM |
250 | name linkname |
251 | (nulsexp "[^\000]*\000")) | |
252 | (when (string-match nulsexp string tar-name-offset) | |
253 | (setq name-end (min name-end (1- (match-end 0))))) | |
254 | (when (string-match nulsexp string tar-link-offset) | |
255 | (setq link-end (min link-end (1- (match-end 0))))) | |
256 | (when (string-match nulsexp string tar-uname-offset) | |
257 | (setq uname-end (min uname-end (1- (match-end 0))))) | |
258 | (when (string-match nulsexp string tar-gname-offset) | |
259 | (setq gname-end (min gname-end (1- (match-end 0))))) | |
260 | (setq name (substring string tar-name-offset name-end) | |
261 | link-p (if (or (= link-p 0) (= link-p ?0)) | |
262 | nil | |
263 | (- link-p ?0))) | |
264 | (setq linkname (substring string tar-link-offset link-end)) | |
64ac1266 | 265 | (when (and (equal uname-valid-p "ustar\0") |
61bb55d0 SM |
266 | (string-match nulsexp string tar-prefix-offset) |
267 | (> (match-end 0) (1+ tar-prefix-offset))) | |
268 | (setq name (concat (substring string tar-prefix-offset | |
269 | (1- (match-end 0))) | |
270 | "/" name))) | |
597e2240 | 271 | (if (default-value 'enable-multibyte-characters) |
61bb55d0 | 272 | (setq name |
d3a36099 | 273 | (decode-coding-string name coding) |
61bb55d0 | 274 | linkname |
d3a36099 | 275 | (decode-coding-string linkname coding))) |
61bb55d0 SM |
276 | (if (and (null link-p) (string-match "/\\'" name)) |
277 | (setq link-p 5)) ; directory | |
278 | ||
279 | (if (and (equal name "././@LongLink") | |
e66f4dfb SM |
280 | ;; Supposedly @LongLink is only used for GNUTAR |
281 | ;; format (i.e. "ustar ") but some POSIX Tar files | |
282 | ;; (with "ustar\0") have been seen using it as well. | |
283 | (member magic-str '("ustar " "ustar\0"))) | |
61bb55d0 SM |
284 | ;; This is a GNU Tar long-file-name header. |
285 | (let* ((size (tar-parse-octal-integer | |
286 | string tar-size-offset tar-time-offset)) | |
287 | ;; -1 so as to strip the terminating 0 byte. | |
288 | (name (buffer-substring pos (+ pos size -1))) | |
289 | (descriptor (tar-header-block-tokenize | |
19eb68d0 SM |
290 | (+ pos (tar-roundup-512 size)) |
291 | coding))) | |
61bb55d0 SM |
292 | (cond |
293 | ((eq link-p (- ?L ?0)) ;GNUTYPE_LONGNAME. | |
294 | (setf (tar-header-name descriptor) name)) | |
295 | ((eq link-p (- ?K ?0)) ;GNUTYPE_LONGLINK. | |
296 | (setf (tar-header-link-name descriptor) name)) | |
297 | (t | |
298 | (message "Unrecognized GNU Tar @LongLink format"))) | |
58d6a142 SM |
299 | (setf (tar-header-header-start descriptor) |
300 | (copy-marker (- pos 512) t)) | |
61bb55d0 SM |
301 | descriptor) |
302 | ||
303 | (make-tar-header | |
304 | (copy-marker pos nil) | |
305 | name | |
306 | (tar-parse-octal-integer string tar-mode-offset tar-uid-offset) | |
307 | (tar-parse-octal-integer string tar-uid-offset tar-gid-offset) | |
308 | (tar-parse-octal-integer string tar-gid-offset tar-size-offset) | |
309 | (tar-parse-octal-integer string tar-size-offset tar-time-offset) | |
310 | (tar-parse-octal-long-integer string tar-time-offset tar-chk-offset) | |
311 | (tar-parse-octal-integer string tar-chk-offset tar-linkp-offset) | |
312 | link-p | |
313 | linkname | |
314 | uname-valid-p | |
4062011e SM |
315 | (when uname-valid-p |
316 | (decode-coding-string | |
317 | (substring string tar-uname-offset uname-end) coding)) | |
318 | (when uname-valid-p | |
319 | (decode-coding-string | |
320 | (substring string tar-gname-offset gname-end) coding)) | |
61bb55d0 SM |
321 | (tar-parse-octal-integer string tar-dmaj-offset tar-dmin-offset) |
322 | (tar-parse-octal-integer string tar-dmin-offset tar-prefix-offset) | |
323 | )))))) | |
aa73f29c | 324 | |
58d6a142 SM |
325 | ;; Pseudo-field. |
326 | (defun tar-header-data-end (descriptor) | |
327 | (let* ((data-start (tar-header-data-start descriptor)) | |
328 | (link-type (tar-header-link-type descriptor)) | |
329 | (size (tar-header-size descriptor)) | |
330 | (fudge (cond | |
331 | ;; Foo. There's an extra empty block after these. | |
332 | ((memq link-type '(20 55)) 512) | |
333 | (t 0)))) | |
334 | (+ data-start fudge | |
335 | (if (and (null link-type) (> size 0)) | |
336 | (tar-roundup-512 size) | |
337 | 0)))) | |
aa73f29c RS |
338 | |
339 | (defun tar-parse-octal-integer (string &optional start end) | |
aa73f29c RS |
340 | (if (null start) (setq start 0)) |
341 | (if (null end) (setq end (length string))) | |
342 | (if (= (aref string start) 0) | |
343 | 0 | |
344 | (let ((n 0)) | |
345 | (while (< start end) | |
346 | (setq n (if (< (aref string start) ?0) n | |
30712209 | 347 | (+ (* n 8) (- (aref string start) ?0))) |
aa73f29c RS |
348 | start (1+ start))) |
349 | n))) | |
350 | ||
30712209 RS |
351 | (defun tar-parse-octal-long-integer (string &optional start end) |
352 | (if (null start) (setq start 0)) | |
353 | (if (null end) (setq end (length string))) | |
354 | (if (= (aref string start) 0) | |
806cba9c | 355 | (list 0 0) |
30712209 RS |
356 | (let ((lo 0) |
357 | (hi 0)) | |
358 | (while (< start end) | |
359 | (if (>= (aref string start) ?0) | |
360 | (setq lo (+ (* lo 8) (- (aref string start) ?0)) | |
361 | hi (+ (* hi 8) (ash lo -16)) | |
362 | lo (logand lo 65535))) | |
363 | (setq start (1+ start))) | |
364 | (list hi lo)))) | |
365 | ||
aa73f29c | 366 | (defun tar-parse-octal-integer-safe (string) |
8560523d SM |
367 | (if (zerop (length string)) (error "empty string")) |
368 | (mapc (lambda (c) | |
369 | (if (or (< c ?0) (> c ?7)) | |
370 | (error "`%c' is not an octal digit" c))) | |
371 | string) | |
aa73f29c RS |
372 | (tar-parse-octal-integer string)) |
373 | ||
374 | ||
1bc28099 | 375 | (defun tar-header-block-checksum (string) |
e865c5ce | 376 | "Compute and return a tar-acceptable checksum for this block." |
61bb55d0 | 377 | (assert (not (multibyte-string-p string))) |
aa73f29c RS |
378 | (let* ((chk-field-start tar-chk-offset) |
379 | (chk-field-end (+ chk-field-start 8)) | |
380 | (sum 0) | |
381 | (i 0)) | |
382 | ;; Add up all of the characters except the ones in the checksum field. | |
383 | ;; Add that field as if it were filled with spaces. | |
384 | (while (< i chk-field-start) | |
385 | (setq sum (+ sum (aref string i)) | |
386 | i (1+ i))) | |
387 | (setq i chk-field-end) | |
388 | (while (< i 512) | |
389 | (setq sum (+ sum (aref string i)) | |
390 | i (1+ i))) | |
391 | (+ sum (* 32 8)))) | |
392 | ||
1bc28099 | 393 | (defun tar-header-block-check-checksum (hblock desired-checksum file-name) |
aa73f29c | 394 | "Beep and print a warning if the checksum doesn't match." |
1bc28099 | 395 | (if (not (= desired-checksum (tar-header-block-checksum hblock))) |
aa73f29c RS |
396 | (progn (beep) (message "Invalid checksum for file %s!" file-name)))) |
397 | ||
30712209 RS |
398 | (defun tar-clip-time-string (time) |
399 | (let ((str (current-time-string time))) | |
139f2b7c | 400 | (concat " " (substring str 4 16) (substring str 19 24)))) |
aa73f29c | 401 | |
139f2b7c SM |
402 | (defun tar-grind-file-mode (mode) |
403 | "Construct a `-rw--r--r--' string indicating MODE. | |
6a06ace6 | 404 | MODE should be an integer which is a file mode value." |
139f2b7c SM |
405 | (string |
406 | (if (zerop (logand 256 mode)) ?- ?r) | |
407 | (if (zerop (logand 128 mode)) ?- ?w) | |
408 | (if (zerop (logand 1024 mode)) (if (zerop (logand 64 mode)) ?- ?x) ?s) | |
409 | (if (zerop (logand 32 mode)) ?- ?r) | |
410 | (if (zerop (logand 16 mode)) ?- ?w) | |
411 | (if (zerop (logand 2048 mode)) (if (zerop (logand 8 mode)) ?- ?x) ?s) | |
412 | (if (zerop (logand 4 mode)) ?- ?r) | |
413 | (if (zerop (logand 2 mode)) ?- ?w) | |
414 | (if (zerop (logand 1 mode)) ?- ?x))) | |
aa73f29c | 415 | |
1bc28099 | 416 | (defun tar-header-block-summarize (tar-hblock &optional mod-p) |
139f2b7c | 417 | "Return a line similar to the output of `tar -vtf'." |
aa73f29c RS |
418 | (let ((name (tar-header-name tar-hblock)) |
419 | (mode (tar-header-mode tar-hblock)) | |
420 | (uid (tar-header-uid tar-hblock)) | |
421 | (gid (tar-header-gid tar-hblock)) | |
422 | (uname (tar-header-uname tar-hblock)) | |
423 | (gname (tar-header-gname tar-hblock)) | |
424 | (size (tar-header-size tar-hblock)) | |
425 | (time (tar-header-date tar-hblock)) | |
8560523d | 426 | ;; (ck (tar-header-checksum tar-hblock)) |
139f2b7c SM |
427 | (type (tar-header-link-type tar-hblock)) |
428 | (link-name (tar-header-link-name tar-hblock))) | |
32d956a8 | 429 | (format "%c%c%s %7s/%-7s %7s%s %s%s" |
139f2b7c | 430 | (if mod-p ?* ? ) |
aa73f29c | 431 | (cond ((or (eq type nil) (eq type 0)) ?-) |
6ee30a2a RS |
432 | ((eq type 1) ?h) ; link |
433 | ((eq type 2) ?l) ; symlink | |
139f2b7c SM |
434 | ((eq type 3) ?c) ; char special |
435 | ((eq type 4) ?b) ; block special | |
436 | ((eq type 5) ?d) ; directory | |
437 | ((eq type 6) ?p) ; FIFO/pipe | |
438 | ((eq type 20) ?*) ; directory listing | |
f9580781 | 439 | ((eq type 28) ?L) ; next has longname |
139f2b7c SM |
440 | ((eq type 29) ?M) ; multivolume continuation |
441 | ((eq type 35) ?S) ; sparse | |
442 | ((eq type 38) ?V) ; volume header | |
133ecc54 | 443 | ((eq type 55) ?H) ; extended pax header |
e5d56b61 | 444 | (t ?\s) |
139f2b7c SM |
445 | ) |
446 | (tar-grind-file-mode mode) | |
447 | (if (= 0 (length uname)) uid uname) | |
448 | (if (= 0 (length gname)) gid gname) | |
449 | size | |
450 | (if tar-mode-show-date (tar-clip-time-string time) "") | |
a28eaf2c EZ |
451 | (propertize name |
452 | 'mouse-face 'highlight | |
453 | 'help-echo "mouse-2: extract this file into a buffer") | |
139f2b7c SM |
454 | (if (or (eq type 1) (eq type 2)) |
455 | (concat (if (= type 1) " ==> " " --> ") link-name) | |
456 | "")))) | |
aa73f29c | 457 | |
27129192 | 458 | (defun tar-untar-buffer () |
643415c4 | 459 | "Extract all archive members in the tar-file into the current directory." |
27129192 | 460 | (interactive) |
f598e45e SM |
461 | ;; FIXME: make it work even if we're not in tar-mode. |
462 | (let ((descriptors tar-parse-info)) ;Read the var in its buffer. | |
463 | (with-current-buffer | |
464 | (if (tar-data-swapped-p) tar-data-buffer (current-buffer)) | |
465 | (set-buffer-multibyte nil) ;Hopefully, a no-op. | |
466 | (dolist (descriptor descriptors) | |
61bb55d0 SM |
467 | (let* ((name (tar-header-name descriptor)) |
468 | (dir (if (eq (tar-header-link-type descriptor) 5) | |
f598e45e SM |
469 | name |
470 | (file-name-directory name))) | |
61bb55d0 SM |
471 | (start (tar-header-data-start descriptor)) |
472 | (end (+ start (tar-header-size descriptor)))) | |
f598e45e SM |
473 | (unless (file-directory-p name) |
474 | (message "Extracting %s" name) | |
475 | (if (and dir (not (file-exists-p dir))) | |
476 | (make-directory dir t)) | |
477 | (unless (file-directory-p name) | |
478 | (write-region start end name)) | |
61bb55d0 | 479 | (set-file-modes name (tar-header-mode descriptor)))))))) |
27129192 | 480 | |
aa73f29c | 481 | (defun tar-summarize-buffer () |
61bb55d0 | 482 | "Parse the contents of the tar file in the current buffer." |
f598e45e SM |
483 | (assert (tar-data-swapped-p)) |
484 | (let* ((modified (buffer-modified-p)) | |
485 | (result '()) | |
486 | (pos (point-min)) | |
d3a36099 | 487 | (coding tar-file-name-coding-system) |
f598e45e | 488 | (progress-reporter |
dd798c64 SM |
489 | (with-current-buffer tar-data-buffer |
490 | (make-progress-reporter "Parsing tar file..." | |
491 | (point-min) (point-max)))) | |
61bb55d0 | 492 | descriptor) |
f598e45e | 493 | (with-current-buffer tar-data-buffer |
dc4e3ccc | 494 | (while (and (< pos (point-max)) |
d3a36099 | 495 | (setq descriptor (tar-header-block-tokenize pos coding))) |
61bb55d0 | 496 | (let ((size (tar-header-size descriptor))) |
c40d3365 MB |
497 | (if (< size 0) |
498 | (error "%s has size %s - corrupted" | |
58d6a142 SM |
499 | (tar-header-name descriptor) size))) |
500 | ;; | |
501 | ;; This is just too slow. Don't really need it anyway.... | |
502 | ;;(tar-header-block-check-checksum | |
503 | ;; hblock (tar-header-block-checksum hblock) | |
504 | ;; (tar-header-name descriptor)) | |
505 | ||
506 | (push descriptor result) | |
507 | (setq pos (tar-header-data-end descriptor)) | |
508 | (progress-reporter-update progress-reporter pos))) | |
509 | ||
61bb55d0 | 510 | (set (make-local-variable 'tar-parse-info) (nreverse result)) |
f598e45e SM |
511 | ;; A tar file should end with a block or two of nulls, |
512 | ;; but let's not get a fatal error if it doesn't. | |
61bb55d0 | 513 | (if (null descriptor) |
f598e45e SM |
514 | (progress-reporter-done progress-reporter) |
515 | (message "Warning: premature EOF parsing tar file")) | |
aa73f29c | 516 | (goto-char (point-min)) |
c40d3365 | 517 | (let ((inhibit-read-only t) |
c40d3365 | 518 | (total-summaries |
61bb55d0 | 519 | (mapconcat 'tar-header-block-summarize tar-parse-info "\n"))) |
c40d3365 | 520 | (insert total-summaries "\n")) |
c40d3365 MB |
521 | (goto-char (point-min)) |
522 | (restore-buffer-modified-p modified))) | |
e865c5ce | 523 | \f |
c40d3365 MB |
524 | (defvar tar-mode-map |
525 | (let ((map (make-keymap))) | |
526 | (suppress-keymap map) | |
527 | (define-key map " " 'tar-next-line) | |
528 | (define-key map "C" 'tar-copy) | |
529 | (define-key map "d" 'tar-flag-deleted) | |
530 | (define-key map "\^D" 'tar-flag-deleted) | |
531 | (define-key map "e" 'tar-extract) | |
532 | (define-key map "f" 'tar-extract) | |
533 | (define-key map "\C-m" 'tar-extract) | |
534 | (define-key map [mouse-2] 'tar-mouse-extract) | |
535 | (define-key map "g" 'revert-buffer) | |
536 | (define-key map "h" 'describe-mode) | |
537 | (define-key map "n" 'tar-next-line) | |
538 | (define-key map "\^N" 'tar-next-line) | |
539 | (define-key map [down] 'tar-next-line) | |
540 | (define-key map "o" 'tar-extract-other-window) | |
541 | (define-key map "p" 'tar-previous-line) | |
542 | (define-key map "q" 'quit-window) | |
543 | (define-key map "\^P" 'tar-previous-line) | |
544 | (define-key map [up] 'tar-previous-line) | |
545 | (define-key map "R" 'tar-rename-entry) | |
546 | (define-key map "u" 'tar-unflag) | |
547 | (define-key map "v" 'tar-view) | |
548 | (define-key map "x" 'tar-expunge) | |
549 | (define-key map "\177" 'tar-unflag-backwards) | |
550 | (define-key map "E" 'tar-extract-other-window) | |
551 | (define-key map "M" 'tar-chmod-entry) | |
552 | (define-key map "G" 'tar-chgrp-entry) | |
553 | (define-key map "O" 'tar-chown-entry) | |
7fe7479d SM |
554 | ;; Let mouse-1 follow the link. |
555 | (define-key map [follow-link] 'mouse-face) | |
53ad7bee | 556 | |
c40d3365 | 557 | ;; Make menu bar items. |
e865c5ce | 558 | |
c40d3365 MB |
559 | ;; Get rid of the Edit menu bar item to save space. |
560 | (define-key map [menu-bar edit] 'undefined) | |
e865c5ce | 561 | |
c40d3365 | 562 | (define-key map [menu-bar immediate] |
53ad7bee | 563 | (cons "Immediate" (make-sparse-keymap "Immediate"))) |
e865c5ce | 564 | |
c40d3365 | 565 | (define-key map [menu-bar immediate view] |
53ad7bee | 566 | '("View This File" . tar-view)) |
c40d3365 | 567 | (define-key map [menu-bar immediate display] |
53ad7bee | 568 | '("Display in Other Window" . tar-display-other-window)) |
c40d3365 | 569 | (define-key map [menu-bar immediate find-file-other-window] |
53ad7bee | 570 | '("Find in Other Window" . tar-extract-other-window)) |
c40d3365 | 571 | (define-key map [menu-bar immediate find-file] |
53ad7bee | 572 | '("Find This File" . tar-extract)) |
e865c5ce | 573 | |
c40d3365 | 574 | (define-key map [menu-bar mark] |
53ad7bee | 575 | (cons "Mark" (make-sparse-keymap "Mark"))) |
e865c5ce | 576 | |
c40d3365 | 577 | (define-key map [menu-bar mark unmark-all] |
53ad7bee | 578 | '("Unmark All" . tar-clear-modification-flags)) |
c40d3365 | 579 | (define-key map [menu-bar mark deletion] |
53ad7bee | 580 | '("Flag" . tar-flag-deleted)) |
c40d3365 | 581 | (define-key map [menu-bar mark unmark] |
53ad7bee | 582 | '("Unflag" . tar-unflag)) |
e865c5ce | 583 | |
c40d3365 | 584 | (define-key map [menu-bar operate] |
53ad7bee | 585 | (cons "Operate" (make-sparse-keymap "Operate"))) |
e865c5ce | 586 | |
c40d3365 | 587 | (define-key map [menu-bar operate chown] |
53ad7bee | 588 | '("Change Owner..." . tar-chown-entry)) |
c40d3365 | 589 | (define-key map [menu-bar operate chgrp] |
53ad7bee | 590 | '("Change Group..." . tar-chgrp-entry)) |
c40d3365 | 591 | (define-key map [menu-bar operate chmod] |
53ad7bee | 592 | '("Change Mode..." . tar-chmod-entry)) |
c40d3365 | 593 | (define-key map [menu-bar operate rename] |
53ad7bee | 594 | '("Rename to..." . tar-rename-entry)) |
c40d3365 | 595 | (define-key map [menu-bar operate copy] |
53ad7bee | 596 | '("Copy to..." . tar-copy)) |
c40d3365 | 597 | (define-key map [menu-bar operate expunge] |
53ad7bee SM |
598 | '("Expunge Marked Files" . tar-expunge)) |
599 | \f | |
c40d3365 MB |
600 | map) |
601 | "Local keymap for Tar mode listings.") | |
602 | ||
603 | \f | |
aa73f29c RS |
604 | ;; tar mode is suitable only for specially formatted data. |
605 | (put 'tar-mode 'mode-class 'special) | |
606 | (put 'tar-subfile-mode 'mode-class 'special) | |
607 | ||
f598e45e SM |
608 | (defun tar-change-major-mode-hook () |
609 | ;; Bring the actual Tar data back into the main buffer. | |
d3a36099 | 610 | (when (tar-data-swapped-p) (tar-swap-data)) |
f598e45e SM |
611 | ;; Throw away the summary. |
612 | (when (buffer-live-p tar-data-buffer) (kill-buffer tar-data-buffer))) | |
613 | ||
614 | (defun tar-mode-kill-buffer-hook () | |
615 | (if (buffer-live-p tar-data-buffer) (kill-buffer tar-data-buffer))) | |
616 | ||
bdd53bbc | 617 | ;;;###autoload |
a91c76d6 | 618 | (define-derived-mode tar-mode nil "Tar" |
aa73f29c | 619 | "Major mode for viewing a tar file as a dired-like listing of its contents. |
f1180544 | 620 | You can move around using the usual cursor motion commands. |
aa73f29c | 621 | Letters no longer insert themselves. |
439fa06f RS |
622 | Type `e' to pull a file out of the tar file and into its own buffer; |
623 | or click mouse-2 on the file's line in the Tar mode buffer. | |
e865c5ce | 624 | Type `c' to copy an entry from the tar file into another file on disk. |
aa73f29c | 625 | |
f1180544 | 626 | If you edit a sub-file of this archive (as with the `e' command) and |
8560523d | 627 | save it with \\[save-buffer], the contents of that buffer will be |
f1180544 | 628 | saved back into the tar-file buffer; in this way you can edit a file |
aa73f29c RS |
629 | inside of a tar archive without extracting it and re-archiving it. |
630 | ||
e865c5ce | 631 | See also: variables `tar-update-datestamp' and `tar-anal-blocksize'. |
aa73f29c | 632 | \\{tar-mode-map}" |
aa73f29c | 633 | (make-local-variable 'tar-parse-info) |
a91c76d6 | 634 | (set (make-local-variable 'require-final-newline) nil) ; binary data, dude... |
a91c76d6 SM |
635 | (set (make-local-variable 'local-enable-local-variables) nil) |
636 | (set (make-local-variable 'next-line-add-newlines) nil) | |
d26e6665 KH |
637 | (set (make-local-variable 'tar-file-name-coding-system) |
638 | (or file-name-coding-system | |
639 | default-file-name-coding-system | |
640 | locale-coding-system)) | |
b9ca3cdb | 641 | ;; Prevent loss of data when saving the file. |
a91c76d6 | 642 | (set (make-local-variable 'file-precious-flag) t) |
03b00795 | 643 | (buffer-disable-undo) |
aa73f29c | 644 | (widen) |
f598e45e SM |
645 | ;; Now move the Tar data into an auxiliary buffer, so we can use the main |
646 | ;; buffer for the summary. | |
647 | (assert (not (tar-data-swapped-p))) | |
648 | (set (make-local-variable 'revert-buffer-function) 'tar-mode-revert) | |
3006c8dc SM |
649 | ;; We started using write-contents-functions, but this hook is not |
650 | ;; used during auto-save, so we now use | |
651 | ;; write-region-annotate-functions which hooks at a lower-level. | |
652 | (add-hook 'write-region-annotate-functions 'tar-write-region-annotate nil t) | |
f598e45e SM |
653 | (add-hook 'kill-buffer-hook 'tar-mode-kill-buffer-hook nil t) |
654 | (add-hook 'change-major-mode-hook 'tar-change-major-mode-hook nil t) | |
655 | ;; Tar data is made of bytes, not chars. | |
58d6a142 | 656 | (set-buffer-multibyte nil) ;Hopefully a no-op. |
f598e45e SM |
657 | (set (make-local-variable 'tar-data-buffer) |
658 | (generate-new-buffer (format " *tar-data %s*" | |
659 | (file-name-nondirectory | |
660 | (or buffer-file-name (buffer-name)))))) | |
dc4e3ccc SM |
661 | (condition-case err |
662 | (progn | |
663 | (tar-swap-data) | |
664 | (tar-summarize-buffer) | |
665 | (tar-next-line 0)) | |
666 | (error | |
667 | ;; If summarizing caused an error, then maybe the buffer doesn't contain | |
668 | ;; tar data. Rather than show a mysterious empty buffer, let's | |
669 | ;; revert to fundamental-mode. | |
670 | (fundamental-mode) | |
671 | (signal (car err) (cdr err))))) | |
aa73f29c RS |
672 | |
673 | ||
56eb0904 | 674 | (define-minor-mode tar-subfile-mode |
aa73f29c | 675 | "Minor mode for editing an element of a tar-file. |
76605277 RS |
676 | This mode arranges for \"saving\" this buffer to write the data |
677 | into the tar-file buffer that it came from. The changes will actually | |
678 | appear on disk when you save the tar-file's buffer." | |
56eb0904 SM |
679 | ;; Don't do this, because it is redundant and wastes mode line space. |
680 | ;; :lighter " TarFile" | |
681 | nil nil nil | |
0f8becaa | 682 | (or (and (boundp 'tar-superior-buffer) tar-superior-buffer) |
e865c5ce | 683 | (error "This buffer is not an element of a tar file")) |
aa73f29c | 684 | (cond (tar-subfile-mode |
76bf6666 | 685 | (add-hook 'write-file-functions 'tar-subfile-save-buffer nil t) |
aa73f29c | 686 | ;; turn off auto-save. |
75238436 | 687 | (auto-save-mode -1) |
56eb0904 | 688 | (setq buffer-auto-save-file-name nil)) |
e865c5ce | 689 | (t |
76bf6666 | 690 | (remove-hook 'write-file-functions 'tar-subfile-save-buffer t)))) |
aa73f29c RS |
691 | |
692 | ||
e865c5ce | 693 | ;; Revert the buffer and recompute the dired-like listing. |
f6b0805a | 694 | (defun tar-mode-revert (&optional no-auto-save no-confirm) |
f598e45e SM |
695 | (unwind-protect |
696 | (let ((revert-buffer-function nil)) | |
d3a36099 | 697 | (if (tar-data-swapped-p) (tar-swap-data)) |
f598e45e SM |
698 | ;; FIXME: If we ask for confirmation, the user will be temporarily |
699 | ;; looking at the raw data. | |
700 | (revert-buffer no-auto-save no-confirm 'preserve-modes) | |
f598e45e | 701 | ;; Recompute the summary. |
d3a36099 | 702 | (if (buffer-live-p tar-data-buffer) (kill-buffer tar-data-buffer)) |
f598e45e | 703 | (tar-mode)) |
d3a36099 | 704 | (unless (tar-data-swapped-p) (tar-swap-data)))) |
aa73f29c RS |
705 | |
706 | ||
210f943e PJ |
707 | (defun tar-next-line (arg) |
708 | "Move cursor vertically down ARG lines and to the start of the filename." | |
aa73f29c | 709 | (interactive "p") |
210f943e | 710 | (forward-line arg) |
58d6a142 | 711 | (goto-char (or (next-single-property-change (point) 'mouse-face) (point)))) |
aa73f29c | 712 | |
210f943e PJ |
713 | (defun tar-previous-line (arg) |
714 | "Move cursor vertically up ARG lines and to the start of the filename." | |
aa73f29c | 715 | (interactive "p") |
210f943e | 716 | (tar-next-line (- arg))) |
aa73f29c RS |
717 | |
718 | (defun tar-current-descriptor (&optional noerror) | |
e865c5ce | 719 | "Return the tar-descriptor of the current line, or signals an error." |
aa73f29c | 720 | ;; I wish lines had plists, like in ZMACS... |
f598e45e | 721 | (or (nth (count-lines (point-min) (line-beginning-position)) |
aa73f29c RS |
722 | tar-parse-info) |
723 | (if noerror | |
724 | nil | |
439fa06f | 725 | (error "This line does not describe a tar-file entry")))) |
aa73f29c | 726 | |
439fa06f RS |
727 | (defun tar-get-descriptor () |
728 | (let* ((descriptor (tar-current-descriptor)) | |
61bb55d0 SM |
729 | (size (tar-header-size descriptor)) |
730 | (link-p (tar-header-link-type descriptor))) | |
439fa06f | 731 | (if link-p |
bf65c664 CY |
732 | (error "This is %s, not a real file" |
733 | (cond ((eq link-p 5) "a directory") | |
734 | ((eq link-p 20) "a tar directory header") | |
735 | ((eq link-p 28) "a next has longname") | |
736 | ((eq link-p 29) "a multivolume-continuation") | |
737 | ((eq link-p 35) "a sparse entry") | |
738 | ((eq link-p 38) "a volume header") | |
739 | ((eq link-p 55) "an extended pax header") | |
740 | (t "a link")))) | |
f09bbd93 | 741 | (if (zerop size) (message "This is a zero-length file")) |
439fa06f RS |
742 | descriptor)) |
743 | ||
744 | (defun tar-mouse-extract (event) | |
745 | "Extract a file whose tar directory line you click on." | |
746 | (interactive "e") | |
53ad7bee | 747 | (with-current-buffer (window-buffer (posn-window (event-end event))) |
439fa06f RS |
748 | (save-excursion |
749 | (goto-char (posn-point (event-end event))) | |
750 | ;; Just make sure this doesn't get an error. | |
751 | (tar-get-descriptor))) | |
752 | (select-window (posn-window (event-end event))) | |
753 | (goto-char (posn-point (event-end event))) | |
754 | (tar-extract)) | |
aa73f29c | 755 | |
07e7a05a EZ |
756 | (defun tar-file-name-handler (op &rest args) |
757 | "Helper function for `tar-extract'." | |
758 | (or (eq op 'file-exists-p) | |
759 | (let ((file-name-handler-alist nil)) | |
760 | (apply op args)))) | |
761 | ||
aa73f29c | 762 | (defun tar-extract (&optional other-window-p) |
628d6cef | 763 | "In Tar mode, extract this entry of the tar file into its own buffer." |
aa73f29c RS |
764 | (interactive) |
765 | (let* ((view-p (eq other-window-p 'view)) | |
439fa06f | 766 | (descriptor (tar-get-descriptor)) |
61bb55d0 SM |
767 | (name (tar-header-name descriptor)) |
768 | (size (tar-header-size descriptor)) | |
769 | (start (tar-header-data-start descriptor)) | |
aa73f29c | 770 | (end (+ start size))) |
aa73f29c | 771 | (let* ((tar-buffer (current-buffer)) |
38c6e0c7 | 772 | (tarname (buffer-name)) |
e8421604 GM |
773 | (bufname (concat (file-name-nondirectory name) |
774 | " (" | |
6da7ea56 | 775 | tarname |
e8421604 | 776 | ")")) |
aa73f29c | 777 | (read-only-p (or buffer-read-only view-p)) |
38c6e0c7 AS |
778 | (new-buffer-file-name (expand-file-name |
779 | ;; `:' is not allowed on Windows | |
dc4e3ccc SM |
780 | (concat tarname "!" |
781 | (if (string-match "/" name) | |
782 | name | |
783 | ;; Make sure `name' contains a / | |
784 | ;; so set-auto-mode doesn't try | |
785 | ;; to look at `tarname' for hints. | |
786 | (concat "./" name))))) | |
e8421604 | 787 | (buffer (get-file-buffer new-buffer-file-name)) |
d26e6665 | 788 | (just-created nil) |
8e69f4d8 | 789 | undo-list) |
e8421604 | 790 | (unless buffer |
38c6e0c7 | 791 | (setq buffer (generate-new-buffer bufname)) |
53ad7bee | 792 | (with-current-buffer buffer |
8e69f4d8 KH |
793 | (setq undo-list buffer-undo-list |
794 | buffer-undo-list t)) | |
38c6e0c7 | 795 | (setq bufname (buffer-name buffer)) |
aa73f29c | 796 | (setq just-created t) |
f598e45e SM |
797 | (with-current-buffer tar-data-buffer |
798 | (let (coding) | |
799 | (narrow-to-region start end) | |
800 | (goto-char start) | |
801 | (setq coding (or coding-system-for-read | |
802 | (and set-auto-coding-function | |
803 | (funcall set-auto-coding-function | |
804 | name (- end start))) | |
805 | ;; The following binding causes | |
806 | ;; find-buffer-file-type-coding-system | |
807 | ;; (defined on dos-w32.el) to act as if | |
808 | ;; the file being extracted existed, so | |
809 | ;; that the file's contents' encoding and | |
810 | ;; EOL format are auto-detected. | |
811 | (let ((file-name-handler-alist | |
812 | '(("" . tar-file-name-handler)))) | |
813 | (car (find-operation-coding-system | |
814 | 'insert-file-contents | |
815 | (cons name (current-buffer)) t))))) | |
816 | (if (or (not coding) | |
817 | (eq (coding-system-type coding) 'undecided)) | |
818 | (setq coding (detect-coding-region start end t))) | |
597e2240 | 819 | (if (and (default-value 'enable-multibyte-characters) |
f598e45e SM |
820 | (coding-system-get coding :for-unibyte)) |
821 | (with-current-buffer buffer | |
822 | (set-buffer-multibyte nil))) | |
823 | (widen) | |
824 | (decode-coding-region start end coding buffer))) | |
825 | (with-current-buffer buffer | |
826 | (goto-char (point-min)) | |
827 | (setq buffer-file-name new-buffer-file-name) | |
828 | (setq buffer-file-truename | |
829 | (abbreviate-file-name buffer-file-name)) | |
830 | ;; Force buffer-file-coding-system to what | |
831 | ;; decode-coding-region actually used. | |
832 | (set-buffer-file-coding-system last-coding-system-used t) | |
833 | ;; Set the default-directory to the dir of the | |
834 | ;; superior buffer. | |
835 | (setq default-directory | |
836 | (with-current-buffer tar-buffer | |
837 | default-directory)) | |
f598e45e | 838 | (rename-buffer bufname) |
f598e45e SM |
839 | (set-buffer-modified-p nil) |
840 | (setq buffer-undo-list undo-list) | |
3ba41ce4 SM |
841 | (normal-mode) ; pick a mode. |
842 | (set (make-local-variable 'tar-superior-buffer) tar-buffer) | |
843 | (set (make-local-variable 'tar-superior-descriptor) descriptor) | |
844 | (setq buffer-read-only read-only-p) | |
f598e45e | 845 | (tar-subfile-mode 1))) |
fd5c9dfa JL |
846 | (cond |
847 | (view-p | |
848 | (view-buffer buffer (and just-created 'kill-buffer-if-not-modified))) | |
849 | ((eq other-window-p 'display) (display-buffer buffer)) | |
850 | (other-window-p (switch-to-buffer-other-window buffer)) | |
851 | (t (switch-to-buffer buffer)))))) | |
aa73f29c RS |
852 | |
853 | ||
854 | (defun tar-extract-other-window () | |
8560523d | 855 | "In Tar mode, find this entry of the tar file in another window." |
aa73f29c RS |
856 | (interactive) |
857 | (tar-extract t)) | |
858 | ||
e865c5ce | 859 | (defun tar-display-other-window () |
8560523d | 860 | "In Tar mode, display this entry of the tar file in another window." |
e865c5ce RS |
861 | (interactive) |
862 | (tar-extract 'display)) | |
863 | ||
aa73f29c | 864 | (defun tar-view () |
8560523d | 865 | "In Tar mode, view the tar file entry on this line." |
aa73f29c RS |
866 | (interactive) |
867 | (tar-extract 'view)) | |
868 | ||
869 | ||
870 | (defun tar-read-file-name (&optional prompt) | |
e865c5ce | 871 | "Read a file name with this line's entry as the default." |
aa73f29c RS |
872 | (or prompt (setq prompt "Copy to: ")) |
873 | (let* ((default-file (expand-file-name | |
61bb55d0 | 874 | (tar-header-name (tar-current-descriptor)))) |
aa73f29c RS |
875 | (target (expand-file-name |
876 | (read-file-name prompt | |
877 | (file-name-directory default-file) | |
878 | default-file nil)))) | |
879 | (if (or (string= "" (file-name-nondirectory target)) | |
880 | (file-directory-p target)) | |
881 | (setq target (concat (if (string-match "/$" target) | |
882 | (substring target 0 (1- (match-end 0))) | |
883 | target) | |
884 | "/" | |
885 | (file-name-nondirectory default-file)))) | |
886 | target)) | |
887 | ||
888 | ||
889 | (defun tar-copy (&optional to-file) | |
8560523d | 890 | "In Tar mode, extract this entry of the tar file into a file on disk. |
aa73f29c RS |
891 | If TO-FILE is not supplied, it is prompted for, defaulting to the name of |
892 | the current tar-entry." | |
893 | (interactive (list (tar-read-file-name))) | |
439fa06f | 894 | (let* ((descriptor (tar-get-descriptor)) |
61bb55d0 SM |
895 | (name (tar-header-name descriptor)) |
896 | (size (tar-header-size descriptor)) | |
897 | (start (tar-header-data-start descriptor)) | |
d4ec0200 RS |
898 | (end (+ start size)) |
899 | (inhibit-file-name-handlers inhibit-file-name-handlers) | |
900 | (inhibit-file-name-operation inhibit-file-name-operation)) | |
6960d7b9 CY |
901 | (with-current-buffer |
902 | (if (tar-data-swapped-p) tar-data-buffer (current-buffer)) | |
d4ec0200 RS |
903 | ;; Inhibit compressing a subfile again if *both* name and |
904 | ;; to-file are handled by jka-compr | |
6960d7b9 CY |
905 | (if (and (eq (find-file-name-handler name 'write-region) |
906 | 'jka-compr-handler) | |
907 | (eq (find-file-name-handler to-file 'write-region) | |
908 | 'jka-compr-handler)) | |
d4ec0200 RS |
909 | (setq inhibit-file-name-handlers |
910 | (cons 'jka-compr-handler | |
911 | (and (eq inhibit-file-name-operation 'write-region) | |
912 | inhibit-file-name-handlers)) | |
913 | inhibit-file-name-operation 'write-region)) | |
d26e6665 KH |
914 | (let ((coding-system-for-write 'no-conversion)) |
915 | (write-region start end to-file nil nil nil t))) | |
6a608e8e | 916 | (message "Copied tar entry %s to %s" name to-file))) |
aa73f29c RS |
917 | |
918 | (defun tar-flag-deleted (p &optional unflag) | |
8560523d | 919 | "In Tar mode, mark this sub-file to be deleted from the tar file. |
aa73f29c RS |
920 | With a prefix argument, mark that many files." |
921 | (interactive "p") | |
922 | (beginning-of-line) | |
8560523d | 923 | (dotimes (i (abs p)) |
aa73f29c RS |
924 | (if (tar-current-descriptor unflag) ; barf if we're not on an entry-line. |
925 | (progn | |
926 | (delete-char 1) | |
927 | (insert (if unflag " " "D")))) | |
928 | (forward-line (if (< p 0) -1 1))) | |
929 | (if (eobp) nil (forward-char 36))) | |
930 | ||
931 | (defun tar-unflag (p) | |
8560523d | 932 | "In Tar mode, un-mark this sub-file if it is marked to be deleted. |
aa73f29c RS |
933 | With a prefix argument, un-mark that many files forward." |
934 | (interactive "p") | |
935 | (tar-flag-deleted p t)) | |
936 | ||
937 | (defun tar-unflag-backwards (p) | |
8560523d | 938 | "In Tar mode, un-mark this sub-file if it is marked to be deleted. |
aa73f29c RS |
939 | With a prefix argument, un-mark that many files backward." |
940 | (interactive "p") | |
941 | (tar-flag-deleted (- p) t)) | |
942 | ||
943 | ||
944 | (defun tar-expunge-internal () | |
945 | "Expunge the tar-entry specified by the current line." | |
58d6a142 | 946 | (let ((descriptor (tar-current-descriptor))) |
aa73f29c RS |
947 | ;; |
948 | ;; delete the current line... | |
f598e45e | 949 | (delete-region (line-beginning-position) (line-beginning-position 2)) |
aa73f29c RS |
950 | ;; |
951 | ;; delete the data pointer... | |
952 | (setq tar-parse-info (delq descriptor tar-parse-info)) | |
953 | ;; | |
954 | ;; delete the data from inside the file... | |
58d6a142 SM |
955 | (with-current-buffer tar-data-buffer |
956 | (delete-region (or (tar-header-header-start descriptor) | |
957 | (- (tar-header-data-start descriptor) 512)) | |
958 | (tar-header-data-end descriptor))))) | |
aa73f29c RS |
959 | |
960 | ||
961 | (defun tar-expunge (&optional noconfirm) | |
8560523d | 962 | "In Tar mode, delete all the archived files flagged for deletion. |
aa73f29c RS |
963 | This does not modify the disk image; you must save the tar file itself |
964 | for this to be permanent." | |
965 | (interactive) | |
966 | (if (or noconfirm | |
67501c01 | 967 | (y-or-n-p "Expunge files marked for deletion? ")) |
d26e6665 | 968 | (let ((n 0)) |
aa73f29c | 969 | (save-excursion |
cb33a0ce | 970 | (goto-char (point-min)) |
aa73f29c RS |
971 | (while (not (eobp)) |
972 | (if (looking-at "D") | |
973 | (progn (tar-expunge-internal) | |
974 | (setq n (1+ n))) | |
975 | (forward-line 1))) | |
976 | ;; after doing the deletions, add any padding that may be necessary. | |
f598e45e | 977 | (tar-pad-to-blocksize)) |
aa73f29c | 978 | (if (zerop n) |
67501c01 RS |
979 | (message "Nothing to expunge.") |
980 | (message "%s files expunged. Be sure to save this buffer." n))))) | |
aa73f29c RS |
981 | |
982 | ||
983 | (defun tar-clear-modification-flags () | |
e865c5ce | 984 | "Remove the stars at the beginning of each line." |
a7e5e8cb | 985 | (interactive) |
aa73f29c | 986 | (save-excursion |
cb33a0ce | 987 | (goto-char (point-min)) |
f598e45e | 988 | (while (not (eobp)) |
e5d56b61 | 989 | (if (not (eq (following-char) ?\s)) |
aa73f29c RS |
990 | (progn (delete-char 1) (insert " "))) |
991 | (forward-line 1)))) | |
992 | ||
993 | ||
994 | (defun tar-chown-entry (new-uid) | |
8560523d | 995 | "Change the user-id associated with this entry in the tar file. |
aa73f29c RS |
996 | If this tar file was written by GNU tar, then you will be able to edit |
997 | the user id as a string; otherwise, you must edit it as a number. | |
998 | You can force editing as a number by calling this with a prefix arg. | |
999 | This does not modify the disk image; you must save the tar file itself | |
1000 | for this to be permanent." | |
61bb55d0 SM |
1001 | (interactive |
1002 | (list | |
1003 | (let ((descriptor (tar-current-descriptor))) | |
1004 | (if (or current-prefix-arg | |
1005 | (not (tar-header-magic descriptor))) | |
1006 | (read-number | |
1007 | "New UID number: " | |
1008 | (format "%s" (tar-header-uid descriptor))) | |
1009 | (read-string "New UID string: " (tar-header-uname descriptor)))))) | |
aa73f29c | 1010 | (cond ((stringp new-uid) |
61bb55d0 | 1011 | (setf (tar-header-uname (tar-current-descriptor)) new-uid) |
4062011e SM |
1012 | (tar-alter-one-field tar-uname-offset |
1013 | (concat (encode-coding-string | |
1014 | new-uid tar-file-name-coding-system) | |
1015 | "\000"))) | |
aa73f29c | 1016 | (t |
61bb55d0 | 1017 | (setf (tar-header-uid (tar-current-descriptor)) new-uid) |
aa73f29c RS |
1018 | (tar-alter-one-field tar-uid-offset |
1019 | (concat (substring (format "%6o" new-uid) 0 6) "\000 "))))) | |
1020 | ||
1021 | ||
1022 | (defun tar-chgrp-entry (new-gid) | |
8560523d | 1023 | "Change the group-id associated with this entry in the tar file. |
aa73f29c RS |
1024 | If this tar file was written by GNU tar, then you will be able to edit |
1025 | the group id as a string; otherwise, you must edit it as a number. | |
1026 | You can force editing as a number by calling this with a prefix arg. | |
1027 | This does not modify the disk image; you must save the tar file itself | |
1028 | for this to be permanent." | |
61bb55d0 SM |
1029 | (interactive |
1030 | (list | |
1031 | (let ((descriptor (tar-current-descriptor))) | |
1032 | (if (or current-prefix-arg | |
1033 | (not (tar-header-magic descriptor))) | |
1034 | (read-number | |
1035 | "New GID number: " | |
1036 | (format "%s" (tar-header-gid descriptor))) | |
1037 | (read-string "New GID string: " (tar-header-gname descriptor)))))) | |
aa73f29c | 1038 | (cond ((stringp new-gid) |
61bb55d0 | 1039 | (setf (tar-header-gname (tar-current-descriptor)) new-gid) |
aa73f29c | 1040 | (tar-alter-one-field tar-gname-offset |
4062011e SM |
1041 | (concat (encode-coding-string |
1042 | new-gid tar-file-name-coding-system) | |
1043 | "\000"))) | |
aa73f29c | 1044 | (t |
61bb55d0 | 1045 | (setf (tar-header-gid (tar-current-descriptor)) new-gid) |
aa73f29c RS |
1046 | (tar-alter-one-field tar-gid-offset |
1047 | (concat (substring (format "%6o" new-gid) 0 6) "\000 "))))) | |
1048 | ||
1049 | (defun tar-rename-entry (new-name) | |
8560523d | 1050 | "Change the name associated with this entry in the tar file. |
aa73f29c RS |
1051 | This does not modify the disk image; you must save the tar file itself |
1052 | for this to be permanent." | |
1053 | (interactive | |
1054 | (list (read-string "New name: " | |
61bb55d0 | 1055 | (tar-header-name (tar-current-descriptor))))) |
439fa06f | 1056 | (if (string= "" new-name) (error "zero length name")) |
d26e6665 | 1057 | (let ((encoded-new-name (encode-coding-string new-name |
58d6a142 SM |
1058 | tar-file-name-coding-system)) |
1059 | (descriptor (tar-current-descriptor)) | |
1060 | (prefix nil)) | |
1061 | (when (tar-header-header-start descriptor) | |
1062 | ;; FIXME: Make it work for ././@LongLink. | |
1063 | (error "Rename with @LongLink format is not implemented")) | |
1064 | ||
1065 | (when (and (> (length encoded-new-name) 98) | |
1066 | (string-match "/" encoded-new-name | |
1067 | (- (length encoded-new-name) 99)) | |
1068 | (< (match-beginning 0) 155)) | |
b6388cc9 SM |
1069 | (unless (equal (tar-header-magic descriptor) "ustar\0") |
1070 | (tar-alter-one-field tar-magic-offset (concat "ustar\0" "00"))) | |
58d6a142 SM |
1071 | (setq prefix (substring encoded-new-name 0 (match-beginning 0))) |
1072 | (setq encoded-new-name (substring encoded-new-name (match-end 0)))) | |
1073 | ||
d26e6665 | 1074 | (if (> (length encoded-new-name) 98) (error "name too long")) |
58d6a142 | 1075 | (setf (tar-header-name descriptor) new-name) |
d26e6665 | 1076 | (tar-alter-one-field 0 |
58d6a142 SM |
1077 | (substring (concat encoded-new-name (make-string 99 0)) 0 99)) |
1078 | (if prefix | |
1079 | (tar-alter-one-field tar-prefix-offset | |
1080 | (substring (concat prefix (make-string 155 0)) 0 155))))) | |
aa73f29c RS |
1081 | |
1082 | ||
1083 | (defun tar-chmod-entry (new-mode) | |
c40d3365 | 1084 | "Change the protection bits associated with this entry in the tar file. |
aa73f29c RS |
1085 | This does not modify the disk image; you must save the tar file itself |
1086 | for this to be permanent." | |
1087 | (interactive (list (tar-parse-octal-integer-safe | |
1088 | (read-string "New protection (octal): ")))) | |
61bb55d0 | 1089 | (setf (tar-header-mode (tar-current-descriptor)) new-mode) |
aa73f29c RS |
1090 | (tar-alter-one-field tar-mode-offset |
1091 | (concat (substring (format "%6o" new-mode) 0 6) "\000 "))) | |
1092 | ||
1093 | ||
58d6a142 SM |
1094 | (defun tar-alter-one-field (data-position new-data-string &optional descriptor) |
1095 | (unless descriptor (setq descriptor (tar-current-descriptor))) | |
1096 | ;; | |
1097 | ;; update the header-line. | |
1098 | (let ((col (current-column))) | |
1099 | (delete-region (line-beginning-position) | |
1100 | (prog2 (forward-line 1) | |
1101 | (point) | |
1102 | ;; Insert the new text after the old, before deleting, | |
1103 | ;; to preserve markers such as the window start. | |
1104 | (insert (tar-header-block-summarize descriptor) "\n"))) | |
1105 | (forward-line -1) (move-to-column col)) | |
f598e45e | 1106 | |
58d6a142 SM |
1107 | (assert (tar-data-swapped-p)) |
1108 | (with-current-buffer tar-data-buffer | |
1109 | (let* ((start (- (tar-header-data-start descriptor) 512))) | |
f598e45e SM |
1110 | ;; |
1111 | ;; delete the old field and insert a new one. | |
1112 | (goto-char (+ start data-position)) | |
1113 | (delete-region (point) (+ (point) (length new-data-string))) ; <-- | |
f598e45e SM |
1114 | (assert (not (or enable-multibyte-characters |
1115 | (multibyte-string-p new-data-string)))) | |
1116 | (insert new-data-string) | |
1117 | ;; | |
1118 | ;; compute a new checksum and insert it. | |
1119 | (let ((chk (tar-header-block-checksum | |
58d6a142 SM |
1120 | (buffer-substring start (+ start 512))))) |
1121 | (goto-char (+ start tar-chk-offset)) | |
1122 | (delete-region (point) (+ (point) 8)) | |
1123 | (insert (format "%6o\0 " chk)) | |
1124 | (setf (tar-header-checksum descriptor) chk) | |
1125 | ;; | |
1126 | ;; ok, make sure we didn't botch it. | |
1127 | (tar-header-block-check-checksum | |
1128 | (buffer-substring start (+ start 512)) | |
1129 | chk (tar-header-name descriptor)) | |
1130 | )))) | |
aa73f29c RS |
1131 | |
1132 | ||
3d7fc2fb ER |
1133 | (defun tar-octal-time (timeval) |
1134 | ;; Format a timestamp as 11 octal digits. Ghod, I hope this works... | |
1135 | (let ((hibits (car timeval)) (lobits (car (cdr timeval)))) | |
516f7fca EZ |
1136 | (format "%05o%01o%05o" |
1137 | (lsh hibits -2) | |
1138 | (logior (lsh (logand 3 hibits) 1) | |
1139 | (if (> (logand lobits 32768) 0) 1 0)) | |
1140 | (logand 32767 lobits) | |
1141 | ))) | |
3d7fc2fb | 1142 | |
aa73f29c | 1143 | (defun tar-subfile-save-buffer () |
e865c5ce RS |
1144 | "In tar subfile mode, save this buffer into its parent tar-file buffer. |
1145 | This doesn't write anything to disk; you must save the parent tar-file buffer | |
aa73f29c RS |
1146 | to make your changes permanent." |
1147 | (interactive) | |
0f8becaa | 1148 | (if (not (and (boundp 'tar-superior-buffer) tar-superior-buffer)) |
f598e45e | 1149 | (error "This buffer has no superior tar file buffer")) |
0f8becaa | 1150 | (if (not (and (boundp 'tar-superior-descriptor) tar-superior-descriptor)) |
f598e45e | 1151 | (error "This buffer doesn't have an index into its superior tar file!")) |
aa73f29c | 1152 | (let ((subfile (current-buffer)) |
f598e45e SM |
1153 | (coding buffer-file-coding-system) |
1154 | (descriptor tar-superior-descriptor) | |
1155 | subfile-size) | |
1156 | (with-current-buffer tar-superior-buffer | |
61bb55d0 SM |
1157 | (let* ((start (tar-header-data-start descriptor)) |
1158 | (name (tar-header-name descriptor)) | |
1159 | (size (tar-header-size descriptor)) | |
dd798c64 | 1160 | (head (memq descriptor tar-parse-info))) |
f598e45e SM |
1161 | (if (not head) |
1162 | (error "Can't find this tar file entry in its parent tar file!")) | |
1163 | (with-current-buffer tar-data-buffer | |
1164 | ;; delete the old data... | |
1165 | (let* ((data-start start) | |
61bb55d0 | 1166 | (data-end (+ data-start (tar-roundup-512 size)))) |
f598e45e SM |
1167 | (narrow-to-region data-start data-end) |
1168 | (delete-region (point-min) (point-max)) | |
1169 | ;; insert the new data... | |
1170 | (goto-char data-start) | |
1171 | (let ((dest (current-buffer))) | |
1172 | (with-current-buffer subfile | |
1173 | (save-restriction | |
1174 | (widen) | |
1175 | (encode-coding-region (point-min) (point-max) coding dest)))) | |
1176 | (setq subfile-size (- (point-max) (point-min))) | |
1177 | ;; | |
1178 | ;; pad the new data out to a multiple of 512... | |
61bb55d0 | 1179 | (let ((subfile-size-pad (tar-roundup-512 subfile-size))) |
f598e45e SM |
1180 | (goto-char (point-max)) |
1181 | (insert (make-string (- subfile-size-pad subfile-size) 0)) | |
1182 | ;; | |
61bb55d0 SM |
1183 | ;; update the data of this files... |
1184 | (setf (tar-header-size descriptor) subfile-size) | |
f598e45e SM |
1185 | ;; |
1186 | ;; Update the size field in the header block. | |
58d6a142 | 1187 | (widen)))) |
f598e45e | 1188 | ;; |
58d6a142 | 1189 | ;; alter the descriptor-line and header |
f598e45e SM |
1190 | ;; |
1191 | (let ((position (- (length tar-parse-info) (length head)))) | |
1192 | (goto-char (point-min)) | |
1193 | (forward-line position) | |
58d6a142 SM |
1194 | (tar-alter-one-field tar-size-offset (format "%11o " subfile-size)) |
1195 | ;; | |
1196 | ;; Maybe update the datestamp. | |
1197 | (when tar-update-datestamp | |
1198 | (tar-alter-one-field tar-time-offset | |
1199 | (concat (tar-octal-time (current-time)) " ")))) | |
f598e45e SM |
1200 | ;; After doing the insertion, add any necessary final padding. |
1201 | (tar-pad-to-blocksize)) | |
1202 | (set-buffer-modified-p t) ; mark the tar file as modified | |
1203 | (tar-next-line 0)) | |
1204 | (set-buffer-modified-p nil) ; mark the tar subfile as unmodified | |
67501c01 | 1205 | (message "Saved into tar-buffer `%s'. Be sure to save that buffer!" |
f598e45e | 1206 | (buffer-name tar-superior-buffer)) |
47414bc1 RS |
1207 | ;; Prevent basic-save-buffer from changing our coding-system. |
1208 | (setq last-coding-system-used buffer-file-coding-system) | |
e865c5ce | 1209 | ;; Prevent ordinary saving from happening. |
f598e45e | 1210 | t)) |
aa73f29c RS |
1211 | |
1212 | ||
1b33e237 | 1213 | ;; When this function is called, it is sure that the buffer is unibyte. |
aa73f29c RS |
1214 | (defun tar-pad-to-blocksize () |
1215 | "If we are being anal about tar file blocksizes, fix up the current buffer. | |
1216 | Leaves the region wide." | |
1217 | (if (null tar-anal-blocksize) | |
1218 | nil | |
aa73f29c | 1219 | (let* ((last-desc (nth (1- (length tar-parse-info)) tar-parse-info)) |
61bb55d0 SM |
1220 | (start (tar-header-data-start last-desc)) |
1221 | (link-p (tar-header-link-type last-desc)) | |
1222 | (size (if link-p 0 (tar-header-size last-desc))) | |
aa73f29c RS |
1223 | (data-end (+ start size)) |
1224 | (bbytes (ash tar-anal-blocksize 9)) | |
f598e45e | 1225 | (pad-to (+ bbytes (* bbytes (/ (- data-end (point-min)) bbytes))))) |
aa73f29c RS |
1226 | ;; If the padding after the last data is too long, delete some; |
1227 | ;; else insert some until we are padded out to the right number of blocks. | |
1228 | ;; | |
f598e45e SM |
1229 | (with-current-buffer tar-data-buffer |
1230 | (let ((goal-end (+ (point-min) pad-to))) | |
1231 | (if (> (point-max) goal-end) | |
1232 | (delete-region goal-end (point-max)) | |
1233 | (goto-char (point-max)) | |
1234 | (insert (make-string (- goal-end (point-max)) ?\0)))))))) | |
19eb68d0 SM |
1235 | |
1236 | ||
3006c8dc SM |
1237 | ;; Used in write-region-annotate-functions to write tar-files out correctly. |
1238 | (defun tar-write-region-annotate (start end) | |
1239 | ;; When called from write-file (and auto-save), `start' is nil. | |
1240 | ;; When called from M-x write-region, we assume the user wants to save | |
1241 | ;; (part of) the summary, not the tar data. | |
1242 | (unless (or start (not (tar-data-swapped-p))) | |
d00da9d7 | 1243 | (tar-clear-modification-flags) |
3006c8dc SM |
1244 | (set-buffer tar-data-buffer) |
1245 | nil)) | |
19eb68d0 | 1246 | |
aa73f29c RS |
1247 | (provide 'tar-mode) |
1248 | ||
8560523d | 1249 | ;; arch-tag: 8a585a4a-340e-42c2-89e7-d3b1013a4b78 |
c88ab9ce | 1250 | ;;; tar-mode.el ends here |