;;; tar-mode.el --- simple editing of tar files from GNU emacs
-;; Copyright (C) 1990,91,93,94,95,96,97,98,99,2000,2001
+;; Copyright (C) 1990,91,93,94,95,96,97,98,99,2000,01,2004
;; Free Software Foundation, Inc.
;; Author: Jamie Zawinski <jwz@lucid.com>
;; This code now understands the extra fields that GNU tar adds to tar files.
;; This interacts correctly with "uncompress.el" in the Emacs library,
-;; which you get with
+;; which you get with
;;
;; (autoload 'uncompress-while-visiting "uncompress")
;; (setq auto-mode-alist (cons '("\\.Z$" . uncompress-while-visiting)
;;
;; Do not attempt to use tar-mode.el with crypt.el, you will lose.
-;; *************** TO DO ***************
+;; *************** TO DO ***************
;;
;; o chmod should understand "a+x,og-w".
;;
-;; o It's not possible to add a NEW file to a tar archive; not that
+;; o It's not possible to add a NEW file to a tar archive; not that
;; important, but still...
;;
;; o The code is less efficient that it could be - in a lot of places, I
;; of an archive, where <esc> would leave you in a subfile-edit buffer.
;; (Like the Meta-R command of the Zmacs mail reader.)
;;
-;; o Sometimes (but not always) reverting the tar-file buffer does not
+;; o Sometimes (but not always) reverting the tar-file buffer does not
;; re-grind the listing, and you are staring at the binary tar data.
;; Typing 'g' again immediately after that will always revert and re-grind
;; it, though. I have no idea why this happens.
;; might be a problem if the tar write-file-hook does not come *first* on
;; the list.
;;
-;; o Block files, sparse files, continuation files, and the various header
+;; o Block files, sparse files, continuation files, and the various header
;; types aren't editable. Actually I don't know that they work at all.
;; Rationale:
(defcustom tar-anal-blocksize 20
"*The blocksize of tar files written by Emacs, or nil, meaning don't care.
The blocksize of a tar file is not really the size of the blocks; rather, it is
-the number of blocks written with one system call. When tarring to a tape,
+the number of blocks written with one system call. When tarring to a tape,
this is the size of the *tape* blocks, but when writing to a file, it doesn't
matter much. The only noticeable difference is that if a tar file does not
have a blocksize of 20, tar will tell you that; all this really controls is
tar file will update its datestamp. If false, the datestamp is unchanged.
You may or may not want this - it is good in that you can tell when a file
in a tar archive has been changed, but it is bad for the same reason that
-editing a file in the tar archive at all is bad - the changed version of
+editing a file in the tar archive at all is bad - the changed version of
the file never exists on disk."
:type 'boolean
:group 'tar)
(defun tar-header-block-tokenize (string)
"Return a `tar-header' structure.
-This is a list of name, mode, uid, gid, size,
+This is a list of name, mode, uid, gid, size,
write-date, checksum, link-type, and link-name."
(cond ((< (length string) 512) nil)
(;(some 'plusp string) ; <-- oops, massive cycle hog!
(dotimes (i L)
(if (or (< (aref string i) ?0)
(> (aref string i) ?7))
- (error "`%c' is not an octal digit"))))
+ (error "`%c' is not an octal digit" (aref string i)))))
(tar-parse-octal-integer string))
(format "%c%c%s%8s/%-8s%7s%s %s%s"
(if mod-p ?* ? )
(cond ((or (eq type nil) (eq type 0)) ?-)
- ((eq type 1) ?l) ; link
- ((eq type 2) ?s) ; symlink
+ ((eq type 1) ?h) ; link
+ ((eq type 2) ?l) ; symlink
((eq type 3) ?c) ; char special
((eq type 4) ?b) ; block special
((eq type 5) ?d) ; directory
""))))
(defun tar-untar-buffer ()
- "Extract all archive members in the tar-file."
+ "Extract all archive members in the tar-file into the current directory."
(interactive)
(let ((multibyte enable-multibyte-characters))
(unwind-protect
(let* ((tokens (tar-desc-tokens descriptor))
(name (tar-header-name tokens))
(dir (file-name-directory name))
- (start (+ (tar-desc-data-start descriptor) tar-header-offset -1))
+ (start (+ (tar-desc-data-start descriptor)
+ (- tar-header-offset (point-min))))
(end (+ start (tar-header-size tokens))))
- (message "Extracting %s" name)
- (if (and dir (not (file-exists-p dir)))
- (make-directory dir t))
- (write-region start end name)
- (set-file-modes name (tar-header-mode tokens)))))
+ (unless (file-directory-p name)
+ (message "Extracting %s" name)
+ (if (and dir (not (file-exists-p dir)))
+ (make-directory dir t))
+ (unless (file-directory-p name)
+ (write-region start end name))
+ (set-file-modes name (tar-header-mode tokens))))))
(set-buffer-multibyte multibyte))))
(defun tar-summarize-buffer ()
(set-buffer-multibyte nil)
(message "Parsing tar file...")
(let* ((result '())
- (pos 1)
+ (pos (point-min))
(bs (max 1 (- (buffer-size) 1024))) ; always 2+ empty blocks at end.
(bs100 (max 1 (/ bs 100)))
tokens)
(insert total-summaries))
(make-local-variable 'tar-header-offset)
(setq tar-header-offset (point))
- (narrow-to-region 1 tar-header-offset)
+ (narrow-to-region (point-min) tar-header-offset)
(if enable-multibyte-characters
(setq tar-header-offset (position-bytes tar-header-offset)))
(set-buffer-modified-p nil))))
;;;###autoload
(define-derived-mode tar-mode nil "Tar"
"Major mode for viewing a tar file as a dired-like listing of its contents.
-You can move around using the usual cursor motion commands.
+You can move around using the usual cursor motion commands.
Letters no longer insert themselves.
Type `e' to pull a file out of the tar file and into its own buffer;
or click mouse-2 on the file's line in the Tar mode buffer.
Type `c' to copy an entry from the tar file into another file on disk.
-If you edit a sub-file of this archive (as with the `e' command) and
-save it with Control-x Control-s, the contents of that buffer will be
-saved back into the tar-file buffer; in this way you can edit a file
+If you edit a sub-file of this archive (as with the `e' command) and
+save it with Control-x Control-s, the contents of that buffer will be
+saved back into the tar-file buffer; in this way you can edit a file
inside of a tar archive without extracting it and re-archiving it.
See also: variables `tar-update-datestamp' and `tar-anal-blocksize'.
(set (make-local-variable 'write-contents-hooks) '(tar-mode-write-file))
(widen)
(if (and (boundp 'tar-header-offset) tar-header-offset)
- (narrow-to-region 1 (byte-to-position tar-header-offset))
+ (narrow-to-region (point-min) (byte-to-position tar-header-offset))
(tar-summarize-buffer)
(tar-next-line 0)))
(interactive "P")
(or (and (boundp 'tar-superior-buffer) tar-superior-buffer)
(error "This buffer is not an element of a tar file"))
-;;; Don't do this, because it is redundant and wastes mode line space.
-;;; (or (assq 'tar-subfile-mode minor-mode-alist)
-;;; (setq minor-mode-alist (append minor-mode-alist
-;;; (list '(tar-subfile-mode " TarFile")))))
+ ;; Don't do this, because it is redundant and wastes mode line space.
+ ;; (or (assq 'tar-subfile-mode minor-mode-alist)
+ ;; (setq minor-mode-alist (append minor-mode-alist
+ ;; (list '(tar-subfile-mode " TarFile")))))
(make-local-variable 'tar-subfile-mode)
(setq tar-subfile-mode
(if (null p)
(not tar-subfile-mode)
(> (prefix-numeric-value p) 0)))
(cond (tar-subfile-mode
- (make-local-variable 'local-write-file-hooks)
- (setq local-write-file-hooks '(tar-subfile-save-buffer))
+ (add-hook 'write-file-functions 'tar-subfile-save-buffer nil t)
;; turn off auto-save.
(auto-save-mode -1)
(setq buffer-auto-save-file-name nil)
(run-hooks 'tar-subfile-mode-hook))
(t
- (kill-local-variable 'local-write-file-hooks))))
+ (remove-hook 'write-file-functions 'tar-subfile-save-buffer t))))
;; Revert the buffer and recompute the dired-like listing.
(tokens (tar-desc-tokens descriptor))
(name (tar-header-name tokens))
(size (tar-header-size tokens))
- (start (+ (tar-desc-data-start descriptor) tar-header-offset -1))
+ (start (+ (tar-desc-data-start descriptor)
+ (- tar-header-offset (point-min))))
(end (+ start size)))
(let* ((tar-buffer (current-buffer))
(tar-buffer-multibyte enable-multibyte-characters)
name (- (point-max) (point)))))))
(multibyte enable-multibyte-characters)
(detected (detect-coding-region
- 1 (min 16384 (point-max)) t)))
+ (point-min)
+ (min (+ (point-min) 16384) (point-max)) t)))
(if coding
(or (numberp (coding-system-eol-type coding))
+ (vectorp (coding-system-eol-type detected))
(setq coding (coding-system-change-eol-conversion
coding
(coding-system-eol-type detected))))
(setq coding
(coding-system-change-text-conversion
coding 'raw-text)))
- (decode-coding-region 1 (point-max) coding)
+ (decode-coding-region (point-min) (point-max) coding)
(set-buffer-file-coding-system coding))
;; Set the default-directory to the dir of the
- ;; superior buffer.
+ ;; superior buffer.
(setq default-directory
(save-excursion
(set-buffer tar-buffer)
(make-local-variable 'tar-superior-descriptor)
(setq tar-superior-buffer tar-buffer)
(setq tar-superior-descriptor descriptor)
- (setq buffer-read-only read-only-p)
+ (setq buffer-read-only read-only-p)
(set-buffer-modified-p nil)
(tar-subfile-mode 1))
(set-buffer tar-buffer))
- (narrow-to-region 1 tar-header-offset)
+ (narrow-to-region (point-min) tar-header-offset)
(set-buffer-multibyte tar-buffer-multibyte)))
(if view-p
(view-buffer buffer (and just-created 'kill-buffer))
(tokens (tar-desc-tokens descriptor))
(name (tar-header-name tokens))
(size (tar-header-size tokens))
- (start (+ (tar-desc-data-start descriptor) tar-header-offset -1))
+ (start (+ (tar-desc-data-start descriptor)
+ (- tar-header-offset (point-min))))
(end (+ start size))
(multibyte enable-multibyte-characters)
(inhibit-file-name-handlers inhibit-file-name-handlers)
(tar-setf (tar-desc-data-start desc)
(- (tar-desc-data-start desc) data-length))))
))
- (narrow-to-region 1 tar-header-offset))
+ (narrow-to-region (point-min) tar-header-offset))
(defun tar-expunge (&optional noconfirm)
(forward-line 1)))
;; after doing the deletions, add any padding that may be necessary.
(tar-pad-to-blocksize)
- (narrow-to-region 1 tar-header-offset))
+ (narrow-to-region (point-min) tar-header-offset))
(set-buffer-multibyte multibyte)
(if (zerop n)
(message "Nothing to expunge.")
(delete-region p (point))
(insert (tar-header-block-summarize tokens) "\n")
(setq tar-header-offset (position-bytes (point-max))))
-
+
(widen)
(set-buffer-multibyte nil)
(let* ((start (+ (tar-desc-data-start descriptor) tar-header-offset -513)))
(buffer-substring start (+ start 512))
chk (tar-header-name tokens))
)))
- (narrow-to-region 1 tar-header-offset)
+ (narrow-to-region (point-min) tar-header-offset)
(set-buffer-multibyte multibyte)
(tar-next-line 0))))
(defun tar-octal-time (timeval)
;; Format a timestamp as 11 octal digits. Ghod, I hope this works...
(let ((hibits (car timeval)) (lobits (car (cdr timeval))))
- (insert (format "%05o%01o%05o"
- (lsh hibits -2)
- (logior (lsh (logand 3 hibits) 1) (> (logand lobits 32768) 0))
- (logand 32767 lobits)
- ))))
+ (format "%05o%01o%05o"
+ (lsh hibits -2)
+ (logior (lsh (logand 3 hibits) 1)
+ (if (> (logand lobits 32768) 0) 1 0))
+ (logand 32767 lobits)
+ )))
(defun tar-subfile-save-buffer ()
"In tar subfile mode, save this buffer into its parent tar-file buffer.
(widen)
(set-buffer-multibyte nil)
;; delete the old data...
- (let* ((data-start (+ start tar-header-offset -1))
+ (let* ((data-start (+ start (- tar-header-offset (point-min))))
(data-end (+ data-start (ash (ash (+ size 511) -9) 9))))
(delete-region data-start data-end)
;; insert the new data...
)))
;; after doing the insertion, add any final padding that may be necessary.
(tar-pad-to-blocksize))
- (narrow-to-region 1 tar-header-offset)
+ (narrow-to-region (point-min) tar-header-offset)
(set-buffer-multibyte tar-buffer-multibyte)))
(set-buffer-modified-p t) ; mark the tar file as modified
(tar-next-line 0)
buffer-file-name nil t))
(tar-clear-modification-flags)
(set-buffer-modified-p nil))
- (narrow-to-region 1 (byte-to-position tar-header-offset)))
+ (narrow-to-region (point-min) (byte-to-position tar-header-offset)))
;; Return t because we've written the file.
t)
\f
(provide 'tar-mode)
+;;; arch-tag: 8a585a4a-340e-42c2-89e7-d3b1013a4b78
;;; tar-mode.el ends here
HCoop / bpt / emacs.git / blobdiff