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+;; DIRED commands for Emacs.  $Revision: 5.234 $
+;; Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 1, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;; Rewritten in 1990/1991 to add tree features, file marking and
+;; sorting by Sebastian Kremer <sk@thp.uni-koeln.de>.
+;; Finished up by rms in 1992.
+
+;;; 15K
+;;;###begin dired-cmd.el
+;; Diffing and compressing
+
+;;;###autoload
+(defun dired-diff (file &optional switches)
+  "Compare file at point with file FILE using `diff'.
+FILE defaults to the file at the mark.
+The prompted-for file is the first file given to `diff'.
+Prefix arg lets you edit the diff switches.  See the command `diff'."
+  (interactive
+   (let ((default (if (mark)
+		      (save-excursion (goto-char (mark))
+				      (dired-get-filename t t)))))
+     (list (read-file-name (format "Diff %s with: %s"
+				   (dired-get-filename t)
+				   (if default
+				       (concat "(default " default ") ")
+				     ""))
+			   (dired-current-directory) default t)
+	   (if (fboundp 'diff-read-switches)
+	       (diff-read-switches "Options for diff: ")))))
+  (if switches				; Emacs 19's diff has but two
+      (diff file (dired-get-filename t) switches) ; args (yet ;-)
+    (diff file (dired-get-filename t))))
+
+;;;###autoload
+(defun dired-backup-diff (&optional switches)
+  "Diff this file with its backup file or vice versa.
+Uses the latest backup, if there are several numerical backups.
+If this file is a backup, diff it with its original.
+The backup file is the first file given to `diff'.
+Prefix arg lets you edit the diff switches.  See the command `diff'."
+  (interactive (list (if (fboundp 'diff-read-switches)
+			 (diff-read-switches "Diff with switches: "))))
+  (let (bak ori (file (dired-get-filename)))
+    (if (backup-file-name-p file)
+	(setq bak file
+	      ori (file-name-sans-versions file))
+      (setq bak (or (dired-latest-backup-file file)
+		    (error "No backup found for %s" file))
+	    ori file))
+    (if switches
+	(diff bak ori switches)
+      (diff bak ori))))
+
+(defun dired-latest-backup-file (fn)	; actually belongs into files.el
+  "Return the latest existing backup of FILE, or nil."
+  ;; First try simple backup, then the highest numbered of the
+  ;; numbered backups.
+  ;; Ignore the value of version-control because we look for existing
+  ;; backups, which maybe were made earlier or by another user with
+  ;; a different value of version-control.
+  (setq fn (expand-file-name fn))
+  (or
+   (let ((bak (make-backup-file-name fn)))
+     (if (file-exists-p bak) bak))
+   (let* ((dir (file-name-directory fn))
+	  (base-versions (concat (file-name-nondirectory fn) ".~"))
+	  (bv-length (length base-versions)))
+     (concat dir
+	     (car (sort
+		   (file-name-all-completions base-versions dir)
+		   ;; bv-length is a fluid var for backup-extract-version:
+		   (function
+		    (lambda (fn1 fn2)
+		      (> (backup-extract-version fn1)
+			 (backup-extract-version fn2))))))))))
+
+(defun dired-do-chxxx (attribute-name program op-symbol arg)
+  ;; Change file attributes (mode, group, owner) of marked files and
+  ;; refresh their file lines.
+  ;; ATTRIBUTE-NAME is a string describing the attribute to the user.
+  ;; PROGRAM is the program used to change the attribute.
+  ;; OP-SYMBOL is the type of operation (for use in dired-mark-pop-up).
+  ;; ARG describes which files to use, as in dired-get-marked-files.
+  (let* ((files (dired-get-marked-files t arg))
+	 (new-attribute
+	  (dired-mark-read-string
+	   (concat "Change " attribute-name " of %s to: ")
+	   nil op-symbol arg files))
+	 (operation (concat program " " new-attribute))
+	 failures)
+    (setq failures
+	  (dired-bunch-files 10000
+			     (function dired-check-process)
+			     (list operation program new-attribute)
+			     files))
+    (dired-do-redisplay arg);; moves point if ARG is an integer
+    (if failures
+	(dired-log-summary
+	 (format "%s: error" operation)
+	 nil))))
+
+;;;###autoload
+(defun dired-do-chmod (&optional arg)
+  "Change the mode of the marked (or next ARG) files.
+This calls chmod, thus symbolic modes like `g+w' are allowed."
+  (interactive "P")
+  (dired-do-chxxx "Mode" "chmod" 'chmod arg))
+
+;;;###autoload
+(defun dired-do-chgrp (&optional arg)
+  "Change the group of the marked (or next ARG) files."
+  (interactive "P")
+  (dired-do-chxxx "Group" "chgrp" 'chgrp arg))
+
+;;;###autoload
+(defun dired-do-chown (&optional arg)
+  "Change the owner of the marked (or next ARG) files."
+  (interactive "P")
+  (dired-do-chxxx "Owner" dired-chown-program 'chown arg))
+
+;; Process all the files in FILES in batches of a convenient size,
+;; by means of (FUNCALL FUNCTION ARGS... SOME-FILES...).
+;; Batches are chosen to need less than MAX chars for the file names,
+;; allowing 3 extra characters of separator per file name.
+(defun dired-bunch-files (max function args files)
+  (let (pending
+	(pending-length 0)
+	failures)
+    ;; Accumulate files as long as they fit in MAX chars,
+    ;; then process the ones accumulated so far.
+    (while files
+      (let* ((thisfile (car files))
+	     (thislength (+ (length thisfile) 3))
+	     (rest (cdr files)))
+	;; If we have at least 1 pending file
+	;; and this file won't fit in the length limit, process now.
+	(if (and pending (> (+ thislength pending-length) max))
+	    (setq failures
+		  (nconc (apply function (append args pending) pending)
+			 failures)
+		  pending nil
+		  pending-length 0))
+	;; Do (setq pending (cons thisfile pending))
+	;; but reuse the cons that was in `files'.
+	(setcdr files pending)
+	(setq pending files)
+	(setq pending-length (+ thislength pending-length))
+	(setq files rest)))
+    (nconc (apply function (append args pending) pending)
+	   failures)))
+
+;;;###autoload
+(defun dired-do-print (&optional arg)
+  "Print the marked (or next ARG) files.
+Uses the shell command coming from variables `lpr-command' and
+`lpr-switches' as default."
+  (interactive "P")
+  (let* ((file-list (dired-get-marked-files t arg))
+	 (command (dired-mark-read-string
+		   "Print %s with: "
+		   (apply 'concat lpr-command " " lpr-switches)
+		   'print arg file-list)))
+    (dired-run-shell-command (dired-shell-stuff-it command file-list nil))))
+
+;; Read arguments for a marked-files command that wants a string
+;; that is not a file name,
+;; perhaps popping up the list of marked files.
+;; ARG is the prefix arg and indicates whether the files came from
+;; marks (ARG=nil) or a repeat factor (integerp ARG).
+;; If the current file was used, the list has but one element and ARG
+;; does not matter. (It is non-nil, non-integer in that case, namely '(4)).
+
+(defun dired-mark-read-string (prompt initial op-symbol arg files)
+  ;; PROMPT for a string, with INITIAL input.
+  ;; Other args are used to give user feedback and pop-up:
+  ;; OP-SYMBOL of command, prefix ARG, marked FILES.
+  (dired-mark-pop-up
+   nil op-symbol files
+   (function read-string)
+   (format prompt (dired-mark-prompt arg files)) initial))
+
+;;; Shell commands
+;;>>> install (move this function into simple.el)
+(defun dired-shell-quote (filename)
+  "Quote a file name for inferior shell (see variable `shell-file-name')."
+  ;; Quote everything except POSIX filename characters.
+  ;; This should be safe enough even for really wierd shells.
+  (let ((result "") (start 0) end)
+    (while (string-match "[^---0-9a-zA-Z_./]" filename start)
+      (setq end (match-beginning 0)
+	    result (concat result (substring filename start end)
+			   "\\" (substring filename end (1+ end)))
+	    start (1+ end)))
+    (concat result (substring filename start))))
+
+(defun dired-read-shell-command (prompt arg files)
+;;  "Read a dired shell command prompting with PROMPT (using read-string).
+;;ARG is the prefix arg and may be used to indicate in the prompt which
+;;  files are affected.
+;;This is an extra function so that you can redefine it, e.g., to use gmhist."
+  (dired-mark-pop-up
+   nil 'shell files
+   (function read-string)
+   (format prompt (dired-mark-prompt arg files))))
+
+;; The in-background argument is only needed in Emacs 18 where
+;; shell-command doesn't understand an appended ampersand `&'.
+;;;###autoload
+(defun dired-do-shell-command (&optional arg in-background)
+  "Run a shell command on the marked files.
+If there is output, it goes to a separate buffer.
+Normally the command is run on each file individually.
+However, if there is a `*' in the command then it is run
+just once with the entire file list substituted there.
+
+If no files are marked or a specific numeric prefix arg is given,
+the next ARG files are used.  Just \\[universal-argument] means the current file.
+The prompt mentions the file(s) or the marker, as appropriate.
+
+No automatic redisplay is attempted, as the file names may have
+changed.  Type \\[dired-do-redisplay] to redisplay the marked files.
+
+The shell command has the top level directory as working directory, so
+output files usually are created there instead of in a subdir."
+;;Functions dired-run-shell-command and dired-shell-stuff-it do the
+;;actual work and can be redefined for customization.
+  (interactive "P")
+  (let* ((on-each (not (string-match "\\*" command)))
+	 (prompt (concat (if in-background "& on " "! on ")
+			 (if on-each "each " "")
+			 "%s: "))
+	 (file-list (dired-get-marked-files t arg))
+	 ;; Want to give feedback whether this file or marked files are used:
+	 (command (dired-read-shell-command
+		   prompt arg file-list)))
+    (if on-each
+	(dired-bunch-files
+	 (- 10000 (length command))
+	 (function (lambda (&rest files)
+		     (dired-run-shell-command
+		      (dired-shell-stuff-it command files t arg))
+		     in-background))
+	 nil
+	 file-list)
+      ;; execute the shell command
+      (dired-run-shell-command
+       (dired-shell-stuff-it command file-list nil arg)
+       in-background))))
+
+;; Might use {,} for bash or csh:
+(defvar dired-mark-prefix ""
+  "Prepended to marked files in dired shell commands.")
+(defvar dired-mark-postfix ""
+  "Appended to marked files in dired shell commands.")
+(defvar dired-mark-separator " "
+  "Separates marked files in dired shell commands.")
+
+(defun dired-shell-stuff-it (command file-list on-each &optional raw-arg)
+;; "Make up a shell command line from COMMAND and FILE-LIST.
+;; If ON-EACH is t, COMMAND should be applied to each file, else
+;; simply concat all files and apply COMMAND to this.
+;; FILE-LIST's elements will be quoted for the shell."
+;; Might be redefined for smarter things and could then use RAW-ARG
+;; (coming from interactive P and currently ignored) to decide what to do.
+;; Smart would be a way to access basename or extension of file names.
+;; See dired-trns.el for an approach to this.
+  ;; Bug: There is no way to quote a *
+  ;; On the other hand, you can never accidentally get a * into your cmd.
+  (let ((stuff-it
+	 (if (string-match "\\*" command)
+	     (function (lambda (x)
+			 (dired-replace-in-string "\\*" x command)))
+	   (function (lambda (x) (concat command " " x))))))
+    (if on-each
+	(mapconcat stuff-it (mapcar 'dired-shell-quote file-list) ";")
+      (let ((fns (mapconcat 'dired-shell-quote
+			    file-list dired-mark-separator)))
+	(if (> (length file-list) 1)
+	    (setq fns (concat dired-mark-prefix fns dired-mark-postfix)))
+	(funcall stuff-it fns)))))
+
+;; This is an extra function so that it can be redefined by ange-ftp.
+(defun dired-run-shell-command (command &optional in-background)
+  (if (not in-background)
+      (shell-command command)
+    ;; We need this only in Emacs 18 (19's shell command has `&').
+    ;; comint::background is defined in emacs-19.el.
+    (comint::background command)))
+
+;; In Emacs 19 this will return program's exit status.
+;; This is a separate function so that ange-ftp can redefine it.
+(defun dired-call-process (program discard &rest arguments)
+;  "Run PROGRAM with output to current buffer unless DISCARD is t.
+;Remaining arguments are strings passed as command arguments to PROGRAM."
+  (apply 'call-process program nil (not discard) nil arguments))
+
+(defun dired-check-process (msg program &rest arguments)
+;  "Display MSG while running PROGRAM, and check for output.
+;Remaining arguments are strings passed as command arguments to PROGRAM.
+; On error, insert output
+; in a log buffer and return the offending ARGUMENTS or PROGRAM.
+; Caller can cons up a list of failed args.
+;Else returns nil for success."
+  (let (err-buffer err (dir default-directory))
+    (message "%s..." msg)
+    (save-excursion
+      ;; Get a clean buffer for error output:
+      (setq err-buffer (get-buffer-create " *dired-check-process output*"))
+      (set-buffer err-buffer)
+      (erase-buffer)
+      (setq default-directory dir	; caller's default-directory
+	    err (/= 0
+		 (apply (function dired-call-process) program nil arguments)))
+      (if err
+	  (progn
+	    (dired-log (concat program " " (prin1-to-string arguments) "\n"))
+	    (dired-log err-buffer)
+	    (or arguments program t))
+	(kill-buffer err-buffer)
+	(message "%s...done" msg)
+	nil))))
+
+;; Commands that delete or redisplay part of the dired buffer.
+
+;;;###autoload
+(defun dired-kill-line-or-subdir (&optional arg)
+  "Kill this line (but don't delete its file).
+Optional prefix argument is a repeat factor.
+If file is displayed as in situ subdir, kill that as well.
+If on a subdir headerline, kill whole subdir."
+  (interactive "p")
+  (if (dired-get-subdir)
+      (dired-kill-subdir)
+    (dired-kill-line arg)))
+
+(defun dired-kill-line (&optional arg)
+  (interactive "P")
+  (setq arg (prefix-numeric-value arg))
+  (let (buffer-read-only file)
+    (while (/= 0 arg)
+      (setq file (dired-get-filename nil t))
+      (if (not file)
+	  (error "Can only kill file lines.")
+	(save-excursion (and file
+			     (dired-goto-subdir file)
+			     (dired-kill-subdir)))
+	(delete-region (progn (beginning-of-line) (point))
+		       (progn (forward-line 1) (point)))
+	(if (> arg 0)
+	    (setq arg (1- arg))
+	  (setq arg (1+ arg))
+	  (forward-line -1))))
+    (dired-move-to-filename)))
+
+;;;###autoload
+(defun dired-do-kill-lines (&optional arg fmt)
+  "Kill all marked lines (not the files).
+With a prefix arg, kill all lines not marked or flagged."
+  ;; Returns count of killed lines.  FMT="" suppresses message.
+  (interactive "P")
+  (save-excursion
+    (goto-char (point-min))
+    (let (buffer-read-only (count 0))
+      (if (not arg)			; kill marked lines
+	  (let ((regexp (dired-marker-regexp)))
+	    (while (and (not (eobp))
+			(re-search-forward regexp nil t))
+	      (setq count (1+ count))
+	      (delete-region (progn (beginning-of-line) (point))
+			     (progn (forward-line 1) (point)))))
+	;; else kill unmarked lines
+	(while (not (eobp))
+	  (if (or (dired-between-files)
+		  (not (looking-at "^  ")))
+	      (forward-line 1)
+	    (setq count (1+ count))
+	    (delete-region (point) (save-excursion
+				     (forward-line 1)
+				     (point))))))
+      (or (equal "" fmt)
+	  (message (or fmt "Killed %d line%s.") count (dired-plural-s count)))
+      count)))
+
+;;;###end dired-cmd.el
+
+;;; 30K
+;;;###begin dired-cp.el
+
+(defun dired-compress ()
+  ;; Compress or uncompress the current file.
+  ;; Return nil for success, offending filename else.
+  (let* (buffer-read-only
+	 (from-file (dired-get-filename)))
+    (cond ((save-excursion (beginning-of-line)
+			   (looking-at dired-re-sym))
+	   (dired-log (concat "Attempt to compress a symbolic link:\n"
+			      from-file))
+	   (dired-make-relative from-file))
+	  ((string-match "\\.Z$" from-file)
+	   (if (dired-check-process (concat "Uncompressing " from-file)
+				    "uncompress" from-file)
+	       (dired-make-relative from-file)
+	     (dired-update-file-line (substring from-file 0 -2))))
+	  (t
+	   (if (dired-check-process (concat "Compressing " from-file)
+				    "compress" "-f" from-file)
+	       ;; Errors from the process are already logged.
+	       (dired-make-relative from-file)
+	     (dired-update-file-line (concat from-file ".Z")))))
+    nil))
+
+(defun dired-mark-confirm (op-symbol arg)
+  ;; Request confirmation from the user that the operation described
+  ;; by OP-SYMBOL is to be performed on the marked files.
+  ;; Confirmation consists in a y-or-n question with a file list
+  ;; pop-up unless OP-SYMBOL is a member of `dired-no-confirm'.
+  ;; The files used are determined by ARG (as in dired-get-marked-files).
+  (or (memq op-symbol dired-no-confirm)
+      (let ((files (dired-get-marked-files t arg)))
+	(dired-mark-pop-up nil op-symbol files (function y-or-n-p)
+			   (concat (capitalize (symbol-name op-symbol)) " "
+				   (dired-mark-prompt arg files) "? ")))))
+
+(defun dired-map-over-marks-check (fun arg op-symbol &optional show-progress)
+;  "Map FUN over marked files (with second ARG like in dired-map-over-marks)
+; and display failures.
+
+; FUN takes zero args.  It returns non-nil (the offending object, e.g.
+; the short form of the filename) for a failure and probably logs a
+; detailed error explanation using function `dired-log'.
+
+; OP-SYMBOL is a symbol describing the operation performed (e.g.
+; `compress').  It is used with `dired-mark-pop-up' to prompt the user
+; (e.g. with `Compress * [2 files]? ') and to display errors (e.g.
+; `Failed to compress 1 of 2 files - type W to see why ("foo")')
+
+; SHOW-PROGRESS if non-nil means redisplay dired after each file."
+  (if (dired-mark-confirm op-symbol arg)
+      (let* ((total-list;; all of FUN's return values
+	      (dired-map-over-marks (funcall fun) arg show-progress))
+	     (total (length total-list))
+	     (failures (delq nil total-list))
+	     (count (length failures)))
+	(if (not failures)
+	    (message "%s: %d file%s."
+		     (capitalize (symbol-name op-symbol))
+		     total (dired-plural-s total))
+	  ;; end this bunch of errors:
+	  (dired-log-summary
+	   (format "Failed to %s %d of %d file%s"
+		   (symbol-name op-symbol) count total (dired-plural-s total))
+	   failures)))))
+
+(defvar dired-query-alist
+  '((?\y . y) (?\040 . y)		; `y' or SPC means accept once
+    (?n . n) (?\177 . n)		; `n' or DEL skips once
+    (?! . yes)				; `!' accepts rest
+    (?q. no) (?\e . no)			; `q' or ESC skips rest
+    ;; None of these keys quit - use C-g for that.
+    ))
+
+(defun dired-query (qs-var qs-prompt &rest qs-args)
+  ;; Query user and return nil or t.
+  ;; Store answer in symbol VAR (which must initially be bound to nil).
+  ;; Format PROMPT with ARGS.
+  ;; Binding variable help-form will help the user who types C-h.
+  (let* ((char (symbol-value qs-var))
+	 (action (cdr (assoc char dired-query-alist))))
+    (cond ((eq 'yes action)
+	   t)				; accept, and don't ask again
+	  ((eq 'no action)
+	   nil)				; skip, and don't ask again
+	  (t;; no lasting effects from last time we asked - ask now
+	   (let ((qprompt (concat qs-prompt
+				  (if help-form
+				      (format " [Type yn!q or %s] "
+					      (key-description
+					       (char-to-string help-char)))
+				    " [Type y, n, q or !] ")))
+		 result elt)
+	     ;; Actually it looks nicer without cursor-in-echo-area - you can
+	     ;; look at the dired buffer instead of at the prompt to decide.
+	     (apply 'message qprompt qs-args)
+	     (setq char (set qs-var (read-char)))
+	     (while (not (setq elt (assoc char dired-query-alist)))
+	       (message "Invalid char - type %c for help." help-char)
+	       (ding)
+	       (sit-for 1)
+	       (apply 'message qprompt qs-args)
+	       (setq char (set qs-var (read-char))))
+	     (memq (cdr elt) '(t y yes)))))))
+
+;;;###autoload
+(defun dired-do-compress (&optional arg)
+  "Compress or uncompress marked (or next ARG) files."
+  (interactive "P")
+  (dired-map-over-marks-check (function dired-compress) arg 'compress t))
+
+;; Commands for Emacs Lisp files - load and byte compile
+
+(defun dired-byte-compile ()
+  ;; Return nil for success, offending file name else.
+  (let* ((filename (dired-get-filename))
+	 (elc-file
+	  (if (eq system-type 'vax-vms)
+	      (concat (substring filename 0 (string-match ";" filename)) "c")
+	    (concat filename "c")))
+	 buffer-read-only failure)
+    (condition-case err
+	(save-excursion (byte-compile-file filename))
+      (error
+       (setq failure err)))
+    (if failure
+	(progn
+	  (dired-log "Byte compile error for %s:\n%s\n" filename failure)
+	  (dired-make-relative filename))
+      (dired-remove-file elc-file)
+      (forward-line)			; insert .elc after its .el file
+      (dired-add-file elc-file)
+      nil)))
+
+;;;###autoload
+(defun dired-do-byte-compile (&optional arg)
+  "Byte compile marked (or next ARG) Emacs Lisp files."
+  (interactive "P")
+  (dired-map-over-marks-check (function dired-byte-compile) arg 'byte-compile t))
+
+(defun dired-load ()
+  ;; Return nil for success, offending file name else.
+  (let ((file (dired-get-filename)) failure)
+    (condition-case err
+      (load file nil nil t)
+      (error (setq failure err)))
+    (if (not failure)
+	nil
+      (dired-log "Load error for %s:\n%s\n" file failure)
+      (dired-make-relative file))))
+
+;;;###autoload
+(defun dired-do-load (&optional arg)
+  "Load the marked (or next ARG) Emacs Lisp files."
+  (interactive "P")
+  (dired-map-over-marks-check (function dired-load) arg 'load t))
+
+;;;###autoload
+(defun dired-do-redisplay (&optional arg test-for-subdir)
+  "Redisplay all marked (or next ARG) files.
+If on a subdir line, redisplay that subdirectory.  In that case,
+a prefix arg lets you edit the `ls' switches used for the new listing."
+  ;; Moves point if the next ARG files are redisplayed.
+  (interactive "P\np")
+  (if (and test-for-subdir (dired-get-subdir))
+      (dired-insert-subdir
+       (dired-get-subdir)
+       (if arg (read-string "Switches for listing: " dired-actual-switches)))
+    (message "Redisplaying...")
+    ;; message much faster than making dired-map-over-marks show progress
+    (dired-map-over-marks (let ((fname (dired-get-filename)))
+			    (message "Redisplaying... %s" fname)
+			    (dired-update-file-line fname))
+			  arg)
+    (dired-move-to-filename)
+    (message "Redisplaying...done")))
+
+(defun dired-update-file-line (file)
+  ;; Delete the current line, and insert an entry for FILE.
+  ;; If FILE is nil, then just delete the current line.
+  ;; Keeps any marks that may be present in column one (doing this
+  ;; here is faster than with dired-add-entry's optional arg).
+  ;; Does not update other dired buffers.  Use dired-relist-entry for that.
+  (beginning-of-line)
+  (let ((char (following-char)) (opoint (point)))
+    (delete-region (point) (progn (forward-line 1) (point)))
+    (if file
+	(progn
+	  (dired-add-entry file)
+	  ;; Replace space by old marker without moving point.
+	  ;; Faster than goto+insdel inside a save-excursion?
+	  (subst-char-in-region opoint (1+ opoint) ?\040 char))))
+  (dired-move-to-filename))
+
+(defun dired-fun-in-all-buffers (directory fun &rest args)
+  ;; In all buffers dired'ing DIRECTORY, run FUN with ARGS.
+  ;; Return list of buffers where FUN succeeded (i.e., returned non-nil).
+  (let ((buf-list (dired-buffers-for-dir directory))
+	(obuf (current-buffer))
+	buf success-list)
+    (while buf-list
+      (setq buf (car buf-list)
+	    buf-list (cdr buf-list))
+      (unwind-protect
+	  (progn
+	    (set-buffer buf)
+	    (if (apply fun args)
+		(setq success-list (cons (buffer-name buf) success-list))))
+	(set-buffer obuf)))
+    success-list))
+
+(defun dired-add-file (filename &optional marker-char)
+  (dired-fun-in-all-buffers
+   (file-name-directory filename)
+   (function dired-add-entry) filename marker-char))
+
+(defun dired-add-entry (filename &optional marker-char)
+  ;; Add a new entry for FILENAME, optionally marking it
+  ;; with MARKER-CHAR (a character, else dired-marker-char is used).
+  ;; Note that this adds the entry `out of order' if files sorted by
+  ;; time, etc.
+  ;; At least this version inserts in the right subdirectory (if present).
+  ;; And it skips "." or ".." (see `dired-trivial-filenames').
+  ;; Hidden subdirs are exposed if a file is added there.
+  (setq filename (directory-file-name filename))
+  ;; Entry is always for files, even if they happen to also be directories
+  (let ((opoint (point))
+	(cur-dir (dired-current-directory))
+	(directory (file-name-directory filename))
+	reason)
+    (setq filename (file-name-nondirectory filename)
+	  reason
+	  (catch 'not-found
+	    (if (string= directory cur-dir)
+		(progn
+		  (skip-chars-forward "^\r\n")
+		  (if (eq (following-char) ?\r)
+		      (dired-unhide-subdir))
+		  ;; We are already where we should be, except when
+		  ;; point is before the subdir line or its total line.
+		  (let ((p (dired-after-subdir-garbage cur-dir)))
+		    (if (< (point) p)
+			(goto-char p))))
+	      ;; else try to find correct place to insert
+	      (if (dired-goto-subdir directory)
+		  (progn;; unhide if necessary
+		    (if (looking-at "\r");; point is at end of subdir line
+			(dired-unhide-subdir))
+		    ;; found - skip subdir and `total' line
+		    ;; and uninteresting files like . and ..
+		    ;; This better not moves into the next subdir!
+		    (dired-goto-next-nontrivial-file))
+		;; not found
+		(throw 'not-found "Subdir not found")))
+	    ;; found and point is at The Right Place:
+	    (let (buffer-read-only)
+	      (beginning-of-line)
+	      (dired-add-entry-do-indentation marker-char)
+	      (dired-ls (dired-make-absolute filename directory);; don't expand `.' !
+			(concat dired-actual-switches "d"))
+	      (forward-line -1)
+	      ;; We want to have the non-directory part, only:
+	      (let* ((beg (dired-move-to-filename t)) ; error for strange output
+		     (end (dired-move-to-end-of-filename)))
+		(setq filename (buffer-substring beg end))
+		(delete-region beg end)
+		(insert (file-name-nondirectory filename)))
+	      (if dired-after-readin-hook;; the subdir-alist is not affected...
+		  (save-excursion;; ...so we can run it right now:
+		    (save-restriction
+		      (beginning-of-line)
+		      (narrow-to-region (point) (save-excursion
+						  (forward-line 1) (point)))
+		      (run-hooks 'dired-after-readin-hook))))
+	      (dired-move-to-filename))
+	    ;; return nil if all went well
+	    nil))
+    (if reason				; don't move away on failure
+	(goto-char opoint))
+    (not reason)))			; return t on succes, nil else
+
+;; This is a separate function for the sake of nested dired format.
+(defun dired-add-entry-do-indentation (marker-char)
+  ;; two spaces or a marker plus a space:
+  (insert (if marker-char
+	      (if (integerp marker-char) marker-char dired-marker-char)
+	    ?\040)
+	  ?\040))
+
+(defun dired-after-subdir-garbage (dir)
+  ;; Return pos of first file line of DIR, skipping header and total
+  ;; or wildcard lines.
+  ;; Important: never moves into the next subdir.
+  ;; DIR is assumed to be unhidden.
+  ;; Will probably be redefined for VMS etc.
+  (save-excursion
+    (or (dired-goto-subdir dir) (error "This cannot happen"))
+    (forward-line 1)
+    (while (and (not (eolp))		; don't cross subdir boundary
+		(not (dired-move-to-filename)))
+	(forward-line 1))
+    (point)))
+
+(defun dired-remove-file (file)
+  (dired-fun-in-all-buffers
+   (file-name-directory file) (function dired-remove-entry) file))
+
+(defun dired-remove-entry (file)
+  (save-excursion
+    (and (dired-goto-file file)
+	 (let (buffer-read-only)
+	   (delete-region (progn (beginning-of-line) (point))
+			  (save-excursion (forward-line 1) (point)))))))
+
+(defun dired-relist-file (file)
+  (dired-fun-in-all-buffers (file-name-directory file)
+			    (function dired-relist-entry) file))
+
+(defun dired-relist-entry (file)
+  ;; Relist the line for FILE, or just add it if it did not exist.
+  ;; FILE must be an absolute pathname.
+  (let (buffer-read-only marker)
+    ;; If cursor is already on FILE's line delete-region will cause
+    ;; save-excursion to fail because of floating makers,
+    ;; moving point to beginning of line.  Sigh.
+    (save-excursion
+      (and (dired-goto-file file)
+	   (delete-region (progn (beginning-of-line)
+				 (setq marker (following-char))
+				 (point))
+			  (save-excursion (forward-line 1) (point))))
+      (setq file (directory-file-name file))
+      (dired-add-entry file (if (eq ?\040 marker) nil marker)))))
+
+;;; Copy, move/rename, making hard and symbolic links
+
+(defvar dired-backup-overwrite nil
+  "*Non-nil if Dired should ask about making backups before overwriting files.
+Special value `always' suppresses confirmation.")
+
+(defun dired-handle-overwrite (to)
+  ;; Save old version of a to be overwritten file TO.
+  ;; `overwrite-confirmed' and `overwrite-backup-query' are fluid vars
+  ;; from dired-create-files.
+  (if (and dired-backup-overwrite
+	   overwrite-confirmed
+	   (or (eq 'always dired-backup-overwrite)
+	       (dired-query 'overwrite-backup-query
+			(format "Make backup for existing file `%s'? " to))))
+      (let ((backup (car (find-backup-file-name to))))
+	(rename-file to backup 0)	; confirm overwrite of old backup
+	(dired-relist-entry backup))))
+
+(defun dired-copy-file (from to ok-flag)
+  (dired-handle-overwrite to)
+  (copy-file from to ok-flag dired-copy-preserve-time))
+
+(defun dired-rename-file (from to ok-flag)
+  (dired-handle-overwrite to)
+  (rename-file from to ok-flag)		; error is caught in -create-files
+  ;; Silently rename the visited file of any buffer visiting this file.
+  (and (get-file-buffer from)
+       (save-excursion
+	 (set-buffer (get-file-buffer from))
+	 (let ((modflag (buffer-modified-p)))
+	   (set-visited-file-name to)
+	   (set-buffer-modified-p modflag))))
+  (dired-remove-file from)
+  ;; See if it's an inserted subdir, and rename that, too.
+  (dired-rename-subdir from to))
+
+(defun dired-rename-subdir (from-dir to-dir)
+  (setq from-dir (file-name-as-directory from-dir)
+	to-dir (file-name-as-directory to-dir))
+  (dired-fun-in-all-buffers from-dir
+			    (function dired-rename-subdir-1) from-dir to-dir)
+  ;; Update visited file name of all affected buffers
+  (let ((blist (buffer-list)))
+    (while blist
+      (save-excursion
+        (set-buffer (car blist))
+	(if (and buffer-file-name
+		 (dired-in-this-tree buffer-file-name from-dir))
+	    (let ((modflag (buffer-modified-p))
+		  (to-file (dired-replace-in-string
+			    (concat "^" (regexp-quote from-dir))
+			    to-dir
+			    buffer-file-name)))
+	      (set-visited-file-name to-file)
+	      (set-buffer-modified-p modflag))))
+      (setq blist (cdr blist)))))
+
+(defun dired-rename-subdir-1 (dir to)
+  ;; Rename DIR to TO in headerlines and dired-subdir-alist, if DIR or
+  ;; one of its subdirectories is expanded in this buffer.
+  (let ((alist dired-subdir-alist)
+	(elt nil))
+    (while alist
+      (setq elt (car alist)
+	    alist (cdr alist))
+      (if (dired-in-this-tree (car elt) dir)
+	  ;; ELT's subdir is affected by the rename
+	  (dired-rename-subdir-2 elt dir to)))
+    (if (equal dir default-directory)
+	;; if top level directory was renamed, lots of things have to be
+	;; updated:
+	(progn
+	  (dired-unadvertise dir)	; we no longer dired DIR...
+	  (setq default-directory to
+		dired-directory (expand-file-name;; this is correct
+				 ;; with and without wildcards
+				 (file-name-nondirectory dired-directory)
+				 to))
+	  (let ((new-name (file-name-nondirectory
+			   (directory-file-name dired-directory))))
+	    ;; try to rename buffer, but just leave old name if new
+	    ;; name would already exist (don't try appending "<%d>")
+	    (or (get-buffer new-name)
+		(rename-buffer new-name)))
+	  ;; ... we dired TO now:
+	  (dired-advertise)))))
+
+(defun dired-rename-subdir-2 (elt dir to)
+  ;; Update the headerline and dired-subdir-alist element of directory
+  ;; described by alist-element ELT to reflect the moving of DIR to TO.
+  ;; Thus, ELT describes either DIR itself or a subdir of DIR.
+  (save-excursion
+    (let ((regexp (regexp-quote (directory-file-name dir)))
+	  (newtext (directory-file-name to))
+	  buffer-read-only)
+      (goto-char (dired-get-subdir-min elt))
+      ;; Update subdir headerline in buffer
+      (if (not (looking-at dired-subdir-regexp))
+	  (error "%s not found where expected - dired-subdir-alist broken?"
+		 dir)
+	(goto-char (match-beginning 1))
+	(if (re-search-forward regexp (match-end 1) t)
+	    (replace-match newtext t t)
+	  (error "Expected to find `%s' in headerline of %s" dir (car elt))))
+      ;; Update buffer-local dired-subdir-alist
+      (setcar elt
+	      (dired-normalize-subdir
+	       (dired-replace-in-string regexp newtext (car elt)))))))
+
+;; Cloning replace-match to work on strings instead of in buffer:
+;; The FIXEDCASE parameter of replace-match is not implemented.
+;;;###autoload
+(defun dired-string-replace-match (regexp string newtext
+					  &optional literal global)
+  "Replace first match of REGEXP in STRING with NEWTEXT.
+If it does not match, nil is returned instead of the new string.
+Optional arg LITERAL means to take NEWTEXT literally.
+Optional arg GLOBAL means to replace all matches."
+  (if global
+        (let ((result "") (start 0) mb me)
+	  (while (string-match regexp string start)
+	    (setq mb (match-beginning 0)
+		  me (match-end 0)
+		  result (concat result
+				 (substring string start mb)
+				 (if literal
+				     newtext
+				   (dired-expand-newtext string newtext)))
+		  start me))
+	  (if mb			; matched at least once
+	      (concat result (substring string start))
+	    nil))
+    ;; not GLOBAL
+    (if (not (string-match regexp string 0))
+	nil
+      (concat (substring string 0 (match-beginning 0))
+	      (if literal newtext (dired-expand-newtext string newtext))
+	      (substring string (match-end 0))))))
+
+(defun dired-expand-newtext (string newtext)
+  ;; Expand \& and \1..\9 (referring to STRING) in NEWTEXT, using match data.
+  ;; Note that in Emacs 18 match data are clipped to current buffer
+  ;; size...so the buffer should better not be smaller than STRING.
+  (let ((pos 0)
+	(len (length newtext))
+	(expanded-newtext ""))
+    (while (< pos len)
+      (setq expanded-newtext
+	    (concat expanded-newtext
+		    (let ((c (aref newtext pos)))
+		      (if (= ?\\ c)
+			  (cond ((= ?\& (setq c
+					      (aref newtext
+						    (setq pos (1+ pos)))))
+				 (substring string
+					    (match-beginning 0)
+					    (match-end 0)))
+				((and (>= c ?1) (<= c ?9))
+				 ;; return empty string if N'th
+				 ;; sub-regexp did not match:
+				 (let ((n (- c ?0)))
+				   (if (match-beginning n)
+				       (substring string
+						  (match-beginning n)
+						  (match-end n))
+				     "")))
+				(t
+				 (char-to-string c)))
+			(char-to-string c)))))
+      (setq pos (1+ pos)))
+    expanded-newtext))
+
+;; The basic function for half a dozen variations on cp/mv/ln/ln -s.
+(defun dired-create-files (file-creator operation fn-list name-constructor
+					&optional marker-char)
+
+;; Create a new file for each from a list of existing files.  The user
+;; is queried, dired buffers are updated, and at the end a success or
+;; failure message is displayed
+
+;; FILE-CREATOR must accept three args: oldfile newfile ok-if-already-exists
+
+;; It is called for each file and must create newfile, the entry of
+;; which will be added.  The user will be queried if the file already
+;; exists.  If oldfile is removed by FILE-CREATOR (i.e, it is a
+;; rename), it is FILE-CREATOR's responsibility to update dired
+;; buffers.  FILE-CREATOR must abort by signalling a file-error if it
+;; could not create newfile.  The error is caught and logged.
+
+;; OPERATION (a capitalized string, e.g. `Copy') describes the
+;; operation performed.  It is used for error logging.
+
+;; FN-LIST is the list of files to copy (full absolute pathnames).
+
+;; NAME-CONSTRUCTOR returns a newfile for every oldfile, or nil to
+;; skip.  If it skips files for other reasons than a direct user
+;; query, it is supposed to tell why (using dired-log).
+
+;; Optional MARKER-CHAR is a character with which to mark every
+;; newfile's entry, or t to use the current marker character if the
+;; oldfile was marked.
+
+  (let (failures skipped (success-count 0) (total (length fn-list)))
+    (let (to overwrite-query
+	     overwrite-backup-query)	; for dired-handle-overwrite
+      (mapcar
+       (function
+	(lambda (from)
+	  (setq to (funcall name-constructor from))
+	  (if (equal to from)
+	      (progn
+		(setq to nil)
+		(dired-log "Cannot %s to same file: %s\n"
+			   (downcase operation) from)))
+	  (if (not to)
+	      (setq skipped (cons (dired-make-relative from) skipped))
+	    (let* ((overwrite (file-exists-p to))
+		   (overwrite-confirmed	; for dired-handle-overwrite
+		    (and overwrite
+			 (let ((help-form '(format "\
+Type SPC or `y' to overwrite file `%s',
+DEL or `n' to skip to next,
+ESC or `q' to not overwrite any of the remaining files,
+`!' to overwrite all remaining files with no more questions." to)))
+			   (dired-query 'overwrite-query
+					"Overwrite `%s'?" to))))
+		   ;; must determine if FROM is marked before file-creator
+		   ;; gets a chance to delete it (in case of a move).
+		   (actual-marker-char
+		    (cond  ((integerp marker-char) marker-char)
+			   (marker-char (dired-file-marker from)) ; slow
+			   (t nil))))
+	      (condition-case err
+		  (progn
+		    (funcall file-creator from to overwrite-confirmed)
+		    (if overwrite
+			;; If we get here, file-creator hasn't been aborted
+			;; and the old entry (if any) has to be deleted
+			;; before adding the new entry.
+			(dired-remove-file to))
+		    (setq success-count (1+ success-count))
+		    (message "%s: %d of %d" operation success-count total)
+		    (dired-add-file to actual-marker-char))
+		(file-error		; FILE-CREATOR aborted
+		 (progn
+		   (setq failures (cons (dired-make-relative from) failures))
+		   (dired-log "%s `%s' to `%s' failed:\n%s\n"
+			      operation from to err))))))))
+       fn-list))
+    (cond
+     (failures
+      (dired-log-summary
+       (format "%s failed for %d of %d file%s"
+		operation (length failures) total
+		(dired-plural-s total))
+       failures))
+     (skipped
+      (dired-log-summary
+       (format "%s: %d of %d file%s skipped"
+		operation (length skipped) total
+		(dired-plural-s total))
+       skipped))
+     (t
+      (message "%s: %s file%s"
+	       operation success-count (dired-plural-s success-count)))))
+  (dired-move-to-filename))
+
+(defun dired-do-create-files (op-symbol file-creator operation arg
+					     &optional marker-char op1
+					     how-to)
+  ;; Create a new file for each marked file.
+  ;; Prompts user for target, which is a directory in which to create
+  ;;   the new files.  Target may be a plain file if only one marked
+  ;;   file exists.
+  ;; OP-SYMBOL is the symbol for the operation.  Function `dired-mark-pop-up'
+  ;;   will determine wether pop-ups are appropriate for this OP-SYMBOL.
+  ;; FILE-CREATOR and OPERATION as in dired-create-files.
+  ;; ARG as in dired-get-marked-files.
+  ;; Optional arg OP1 is an alternate form for OPERATION if there is
+  ;;   only one file.
+  ;; Optional arg MARKER-CHAR as in dired-create-files.
+  ;; Optional arg HOW-TO determines how to treat target:
+  ;;   If HOW-TO is not given (or nil), and target is a directory, the
+  ;;     file(s) are created inside the target directory.  If target
+  ;;     is not a directory, there must be exactly one marked file,
+  ;;     else error.
+  ;;   If HOW-TO is t, then target is not modified.  There must be
+  ;;     exactly one marked file, else error.
+  ;; Else HOW-TO is assumed to be a function of one argument, target,
+  ;;     that looks at target and returns a value for the into-dir
+  ;;     variable.  The function dired-into-dir-with-symlinks is provided
+  ;;     for the case (common when creating symlinks) that symbolic
+  ;;     links to directories are not to be considered as directories
+  ;;     (as file-directory-p would if HOW-TO had been nil).
+  (or op1 (setq op1 operation))
+  (let* ((fn-list (dired-get-marked-files nil arg))
+	 (fn-count (length fn-list))
+	 (target (expand-file-name
+		   (dired-mark-read-file-name
+		    (concat (if (= 1 fn-count) op1 operation) " %s to: ")
+		    (dired-dwim-target-directory)
+		    op-symbol arg (mapcar (function dired-make-relative) fn-list))))
+	 (into-dir (cond ((null how-to) (file-directory-p target))
+			 ((eq how-to t) nil)
+			 (t (funcall how-to target)))))
+    (if (and (> fn-count 1)
+	     (not into-dir))
+	(error "Marked %s: target must be a directory: %s" operation target))
+    ;; rename-file bombs when moving directories unless we do this:
+    (or into-dir (setq target (directory-file-name target)))
+    (dired-create-files
+     file-creator operation fn-list
+     (if into-dir			; target is a directory
+	 ;; This function uses fluid vars into-dir and target when called
+	 ;; inside dired-create-files:
+	 (function (lambda (from)
+		     (expand-file-name (file-name-nondirectory from) target)))
+       (function (lambda (from) target)))
+     marker-char)))
+
+;; Read arguments for a marked-files command that wants a file name,
+;; perhaps popping up the list of marked files.
+;; ARG is the prefix arg and indicates whether the files came from
+;; marks (ARG=nil) or a repeat factor (integerp ARG).
+;; If the current file was used, the list has but one element and ARG
+;; does not matter. (It is non-nil, non-integer in that case, namely '(4)).
+
+(defun dired-mark-read-file-name (prompt dir op-symbol arg files)
+  (dired-mark-pop-up
+   nil op-symbol files
+   (function read-file-name)
+   (format prompt (dired-mark-prompt arg files)) dir))
+
+(defun dired-dwim-target-directory ()
+  ;; Try to guess which target directory the user may want.
+  ;; If there is a dired buffer displayed in the next window, use
+  ;; its current subdir, else use current subdir of this dired buffer.
+  (let ((this-dir (and (eq major-mode 'dired-mode)
+		       (dired-current-directory))))
+    ;; non-dired buffer may want to profit from this function, e.g. vm-uudecode
+    (if dired-dwim-target
+	(let* ((other-buf (window-buffer (next-window)))
+	       (other-dir (save-excursion
+			    (set-buffer other-buf)
+			    (and (eq major-mode 'dired-mode)
+				 (dired-current-directory)))))
+	  (or other-dir this-dir))
+      this-dir)))
+
+;;;###autoload
+(defun dired-create-directory (directory)
+  "Create a directory called DIRECTORY."
+  (interactive
+   (list (read-file-name "Create directory: " (dired-current-directory))))
+  (let ((expanded (directory-file-name (expand-file-name directory))))
+    (make-directory expanded)
+    (dired-add-file expanded)
+    (dired-move-to-filename)))
+
+(defun dired-into-dir-with-symlinks (target)
+  (and (file-directory-p target)
+       (not (file-symlink-p target))))
+;; This may not always be what you want, especially if target is your
+;; home directory and it happens to be a symbolic link, as is often the
+;; case with NFS and automounters.  Or if you want to make symlinks
+;; into directories that themselves are only symlinks, also quite
+;; common.
+
+;; So we don't use this function as value for HOW-TO in
+;; dired-do-symlink, which has the minor disadvantage of
+;; making links *into* a symlinked-dir, when you really wanted to
+;; *overwrite* that symlink.  In that (rare, I guess) case, you'll
+;; just have to remove that symlink by hand before making your marked
+;; symlinks.
+
+;;;###autoload
+(defun dired-do-copy (&optional arg)
+  "Copy all marked (or next ARG) files, or copy the current file.
+This normally preserves the last-modified date when copying.
+When operating on just the current file, you specify the new name.
+When operating on multiple or marked files, you specify a directory
+and new symbolic links are made in that directory
+with the same names that the files currently have."
+  (interactive "P")
+  (dired-do-create-files 'copy (function dired-copy-file)
+			   (if dired-copy-preserve-time "Copy [-p]" "Copy")
+			   arg dired-keep-marker-copy))
+
+;;;###autoload
+(defun dired-do-symlink (&optional arg)
+  "Make symbolic links to current file or all marked (or next ARG) files.
+When operating on just the current file, you specify the new name.
+When operating on multiple or marked files, you specify a directory
+and new symbolic links are made in that directory
+with the same names that the files currently have."
+  (interactive "P")
+  (dired-do-create-files 'symlink (function make-symbolic-link)
+			   "Symlink" arg dired-keep-marker-symlink))
+
+;;;###autoload
+(defun dired-do-hardlink (&optional arg)
+  "Add names (hard links) current file or all marked (or next ARG) files.
+When operating on just the current file, you specify the new name.
+When operating on multiple or marked files, you specify a directory
+and new hard links are made in that directory
+with the same names that the files currently have."
+  (interactive "P")
+  (dired-do-create-files 'hardlink (function add-name-to-file)
+			   "Hardlink" arg dired-keep-marker-hardlink))
+
+;;;###autoload
+(defun dired-do-rename (&optional arg)
+  "Rename current file or all marked (or next ARG) files.
+When renaming just the current file, you specify the new name.
+When renaming multiple or marked files, you specify a directory."
+  (interactive "P")
+  (dired-do-create-files 'move (function dired-rename-file)
+			 "Move" arg dired-keep-marker-rename "Rename"))
+;;;###end dired-cp.el
+
+;;; 5K
+;;;###begin dired-re.el
+(defun dired-do-create-files-regexp
+  (file-creator operation arg regexp newname &optional whole-path marker-char)
+  ;; Create a new file for each marked file using regexps.
+  ;; FILE-CREATOR and OPERATION as in dired-create-files.
+  ;; ARG as in dired-get-marked-files.
+  ;; Matches each marked file against REGEXP and constructs the new
+  ;;   filename from NEWNAME (like in function replace-match).
+  ;; Optional arg WHOLE-PATH means match/replace the whole pathname
+  ;;   instead of only the non-directory part of the file.
+  ;; Optional arg MARKER-CHAR as in dired-create-files.
+  (let* ((fn-list (dired-get-marked-files nil arg))
+	 (fn-count (length fn-list))
+	 (operation-prompt (concat operation " `%s' to `%s'?"))
+	 (rename-regexp-help-form (format "\
+Type SPC or `y' to %s one match, DEL or `n' to skip to next,
+`!' to %s all remaining matches with no more questions."
+					  (downcase operation)
+					  (downcase operation)))
+	 (regexp-name-constructor
+	  ;; Function to construct new filename using REGEXP and NEWNAME:
+	  (if whole-path		; easy (but rare) case
+	      (function
+	       (lambda (from)
+		 (let ((to (dired-string-replace-match regexp from newname))
+		       ;; must bind help-form directly around call to
+		       ;; dired-query
+		       (help-form rename-regexp-help-form))
+		   (if to
+		       (and (dired-query 'rename-regexp-query
+					 operation-prompt
+					 from
+					 to)
+			    to)
+		     (dired-log "%s: %s did not match regexp %s\n"
+				operation from regexp)))))
+	    ;; not whole-path, replace non-directory part only
+	    (function
+	     (lambda (from)
+	       (let* ((new (dired-string-replace-match
+			    regexp (file-name-nondirectory from) newname))
+		      (to (and new	; nil means there was no match
+			       (expand-file-name new
+						 (file-name-directory from))))
+		      (help-form rename-regexp-help-form))
+		 (if to
+		     (and (dired-query 'rename-regexp-query
+				       operation-prompt
+				       (dired-make-relative from)
+				       (dired-make-relative to))
+			  to)
+		   (dired-log "%s: %s did not match regexp %s\n"
+			      operation (file-name-nondirectory from) regexp)))))))
+	 rename-regexp-query)
+    (dired-create-files
+     file-creator operation fn-list regexp-name-constructor marker-char)))
+
+(defun dired-mark-read-regexp (operation)
+  ;; Prompt user about performing OPERATION.
+  ;; Read and return list of: regexp newname arg whole-path.
+  (let* ((whole-path
+	  (equal 0 (prefix-numeric-value current-prefix-arg)))
+	 (arg
+	  (if whole-path nil current-prefix-arg))
+	 (regexp
+	  (dired-read-regexp
+	   (concat (if whole-path "Path " "") operation " from (regexp): ")
+	   dired-flagging-regexp))
+	 (newname
+	  (read-string
+	   (concat (if whole-path "Path " "") operation " " regexp " to: "))))
+    (list regexp newname arg whole-path)))
+
+;;;###autoload
+(defun dired-do-rename-regexp (regexp newname &optional arg whole-path)
+  "Rename marked files containing REGEXP to NEWNAME.
+As each match is found, the user must type a character saying
+  what to do with it.  For directions, type \\[help-command] at that time.
+NEWNAME may contain \\=\\<n> or \\& as in `query-replace-regexp'.
+REGEXP defaults to the last regexp used.
+With a zero prefix arg, renaming by regexp affects the complete
+  pathname - usually only the non-directory part of file names is used
+  and changed."
+  (interactive (dired-mark-read-regexp "Rename"))
+  (dired-do-create-files-regexp
+   (function dired-rename-file)
+   "Rename" arg regexp newname whole-path dired-keep-marker-rename))
+
+;;;###autoload
+(defun dired-do-copy-regexp (regexp newname &optional arg whole-path)
+  "Copy all marked files containing REGEXP to NEWNAME.
+See function `dired-rename-regexp' for more info."
+  (interactive (dired-mark-read-regexp "Copy"))
+  (dired-do-create-files-regexp
+   (function dired-copy-file)
+   (if dired-copy-preserve-time "Copy [-p]" "Copy")
+   arg regexp newname whole-path dired-keep-marker-copy))
+
+;;;###autoload
+(defun dired-do-hardlink-regexp (regexp newname &optional arg whole-path)
+  "Hardlink all marked files containing REGEXP to NEWNAME.
+See function `dired-rename-regexp' for more info."
+  (interactive (dired-mark-read-regexp "HardLink"))
+  (dired-do-create-files-regexp
+   (function add-name-to-file)
+   "HardLink" arg regexp newname whole-path dired-keep-marker-hardlink))
+
+;;;###autoload
+(defun dired-do-symlink-regexp (regexp newname &optional arg whole-path)
+  "Symlink all marked files containing REGEXP to NEWNAME.
+See function `dired-rename-regexp' for more info."
+  (interactive (dired-mark-read-regexp "SymLink"))
+  (dired-do-create-files-regexp
+   (function make-symbolic-link)
+   "SymLink" arg regexp newname whole-path dired-keep-marker-symlink))
+
+(defun dired-create-files-non-directory
+  (file-creator basename-constructor operation arg)
+  ;; Perform FILE-CREATOR on the non-directory part of marked files
+  ;; using function BASENAME-CONSTRUCTOR, with query for each file.
+  ;; OPERATION like in dired-create-files, ARG as in dired-get-marked-files.
+  (let (rename-non-directory-query)
+    (dired-create-files
+     file-creator
+     operation
+     (dired-get-marked-files nil arg)
+     (function
+      (lambda (from)
+	(let ((to (concat (file-name-directory from)
+			  (funcall basename-constructor
+				   (file-name-nondirectory from)))))
+	  (and (let ((help-form (format "\
+Type SPC or `y' to %s one file, DEL or `n' to skip to next,
+`!' to %s all remaining matches with no more questions."
+					(downcase operation)
+					(downcase operation))))
+		 (dired-query 'rename-non-directory-query
+			      (concat operation " `%s' to `%s'")
+			      (dired-make-relative from)
+			      (dired-make-relative to)))
+	       to))))
+     dired-keep-marker-rename)))
+
+(defun dired-rename-non-directory (basename-constructor operation arg)
+  (dired-create-files-non-directory
+   (function dired-rename-file)
+   basename-constructor operation arg))
+
+;;;###autoload
+(defun dired-upcase (&optional arg)
+  "Rename all marked (or next ARG) files to upper case."
+  (interactive "P")
+  (dired-rename-non-directory (function upcase) "Rename upcase" arg))
+
+;;;###autoload
+(defun dired-downcase (&optional arg)
+  "Rename all marked (or next ARG) files to lower case."
+  (interactive "P")
+  (dired-rename-non-directory (function downcase) "Rename downcase" arg))
+
+;;;###end dired-re.el
+
+;;; 13K
+;;;###begin dired-ins.el
+
+;;;###autoload
+(defun dired-maybe-insert-subdir (dirname &optional
+					  switches no-error-if-not-dir-p)
+  "Insert this subdirectory into the same dired buffer.
+If it is already present, just move to it (type \\[dired-do-redisplay] to refresh),
+  else inserts it at its natural place (as `ls -lR' would have done).
+With a prefix arg, you may edit the ls switches used for this listing.
+  You can add `R' to the switches to expand the whole tree starting at
+  this subdirectory.
+This function takes some pains to conform to `ls -lR' output."
+  (interactive
+   (list (dired-get-filename)
+	 (if current-prefix-arg
+	     (read-string "Switches for listing: " dired-actual-switches))))
+  (let ((opoint (point)))
+    ;; We don't need a marker for opoint as the subdir is always
+    ;; inserted *after* opoint.
+    (setq dirname (file-name-as-directory dirname))
+    (or (and (not switches)
+	     (dired-goto-subdir dirname))
+	(dired-insert-subdir dirname switches no-error-if-not-dir-p))
+    ;; Push mark so that it's easy to find back.  Do this after the
+    ;; insert message so that the user sees the `Mark set' message.
+    (push-mark opoint)))
+
+(defun dired-insert-subdir (dirname &optional switches no-error-if-not-dir-p)
+  "Insert this subdirectory into the same dired buffer.
+If it is already present, overwrites previous entry,
+  else inserts it at its natural place (as `ls -lR' would have done).
+With a prefix arg, you may edit the `ls' switches used for this listing.
+  You can add `R' to the switches to expand the whole tree starting at
+  this subdirectory.
+This function takes some pains to conform to `ls -lR' output."
+  ;; NO-ERROR-IF-NOT-DIR-P needed for special filesystems like
+  ;; Prospero where dired-ls does the right thing, but
+  ;; file-directory-p has not been redefined.
+  (interactive
+   (list (dired-get-filename)
+	 (if current-prefix-arg
+	     (read-string "Switches for listing: " dired-actual-switches))))
+  (setq dirname (file-name-as-directory (expand-file-name dirname)))
+  (dired-insert-subdir-validate dirname switches)
+  (or no-error-if-not-dir-p
+      (file-directory-p dirname)
+      (error  "Attempt to insert a non-directory: %s" dirname))
+  (let ((elt (assoc dirname dired-subdir-alist))
+	 switches-have-R mark-alist case-fold-search buffer-read-only)
+    ;; case-fold-search is nil now, so we can test for capital `R':
+    (if (setq switches-have-R (and switches (string-match "R" switches)))
+	;; avoid duplicated subdirs
+	(setq mark-alist (dired-kill-tree dirname t)))
+    (if elt
+	;; If subdir is already present, remove it and remember its marks
+	(setq mark-alist (nconc (dired-insert-subdir-del elt) mark-alist))
+      (dired-insert-subdir-newpos dirname)) ; else compute new position
+    (dired-insert-subdir-doupdate
+     dirname elt (dired-insert-subdir-doinsert dirname switches))
+    (if switches-have-R (dired-build-subdir-alist))
+    (dired-initial-position dirname)
+    (save-excursion (dired-mark-remembered mark-alist))))
+
+;; This is a separate function for dired-vms.
+(defun dired-insert-subdir-validate (dirname &optional switches)
+  ;; Check that it is valid to insert DIRNAME with SWITCHES.
+  ;; Signal an error if invalid (e.g. user typed `i' on `..').
+  (or (dired-in-this-tree dirname default-directory)
+      (error  "%s: not in this directory tree" dirname))
+  (if switches
+      (let (case-fold-search)
+	(mapcar
+	 (function
+	  (lambda (x)
+	    (or (eq (null (string-match x switches))
+		    (null (string-match x dired-actual-switches)))
+		(error "Can't have dirs with and without -%s switches together"
+		       x))))
+	 ;; all switches that make a difference to dired-get-filename:
+	 '("F" "b")))))
+
+(defun dired-alist-add (dir new-marker)
+  ;; Add new DIR at NEW-MARKER.  Sort alist.
+  (dired-alist-add-1 dir new-marker)
+  (dired-alist-sort))
+
+(defun dired-alist-sort ()
+  ;; Keep the alist sorted on buffer position.
+  (setq dired-subdir-alist
+	(sort dired-subdir-alist
+	      (function (lambda (elt1 elt2)
+			  (> (dired-get-subdir-min elt1)
+			     (dired-get-subdir-min elt2)))))))
+
+(defun dired-kill-tree (dirname &optional remember-marks)
+  ;;"Kill all proper subdirs of DIRNAME, excluding DIRNAME itself.
+  ;; With optional arg REMEMBER-MARKS, return an alist of marked files."
+  (interactive "DKill tree below directory: ")
+  (let ((s-alist dired-subdir-alist) dir m-alist)
+    (while s-alist
+      (setq dir (car (car s-alist))
+	    s-alist (cdr s-alist))
+      (if (and (not (string-equal dir dirname))
+	       (dired-in-this-tree dir dirname)
+	       (dired-goto-subdir dir))
+	  (setq m-alist (nconc (dired-kill-subdir remember-marks) m-alist))))
+    m-alist))
+
+(defun dired-insert-subdir-newpos (new-dir)
+  ;; Find pos for new subdir, according to tree order.
+  ;;(goto-char (point-max))
+  (let ((alist dired-subdir-alist) elt dir pos new-pos)
+    (while alist
+      (setq elt (car alist)
+	    alist (cdr alist)
+	    dir (car elt)
+	    pos (dired-get-subdir-min elt))
+      (if (dired-tree-lessp dir new-dir)
+	  ;; Insert NEW-DIR after DIR
+	  (setq new-pos (dired-get-subdir-max elt)
+		alist nil)))
+    (goto-char new-pos))
+  ;; want a separating newline between subdirs
+  (or (eobp)
+      (forward-line -1))
+  (insert "\n")
+  (point))
+
+(defun dired-insert-subdir-del (element)
+  ;; Erase an already present subdir (given by ELEMENT) from buffer.
+  ;; Move to that buffer position.  Return a mark-alist.
+  (let ((begin-marker (dired-get-subdir-min element)))
+    (goto-char begin-marker)
+    ;; Are at beginning of subdir (and inside it!).  Now determine its end:
+    (goto-char (dired-subdir-max))
+    (or (eobp);; want a separating newline _between_ subdirs:
+	(forward-char -1))
+    (prog1
+	(dired-remember-marks begin-marker (point))
+      (delete-region begin-marker (point)))))
+
+(defun dired-insert-subdir-doinsert (dirname switches)
+  ;; Insert ls output after point and put point on the correct
+  ;; position for the subdir alist.
+  ;; Return the boundary of the inserted text (as list of BEG and END).
+  (let ((begin (point)) end)
+    (message "Reading directory %s..." dirname)
+    (let ((dired-actual-switches
+	   (or switches
+	       (dired-replace-in-string "R" "" dired-actual-switches))))
+      (if (equal dirname (car (car (reverse dired-subdir-alist))))
+	  ;; top level directory may contain wildcards:
+	  (dired-readin-insert dired-directory)
+	(dired-ls dirname dired-actual-switches nil t)))
+    (message "Reading directory %s...done" dirname)
+    (setq end (point-marker))
+    (indent-rigidly begin end 2)
+    ;;  call dired-insert-headerline afterwards, as under VMS dired-ls
+    ;;  does insert the headerline itself and the insert function just
+    ;;  moves point.
+    ;;  Need a marker for END as this inserts text.
+    (goto-char begin)
+    (dired-insert-headerline dirname)
+    ;; point is now like in dired-build-subdir-alist
+    (prog1
+	(list begin (marker-position end))
+      (set-marker end nil))))
+
+(defun dired-insert-subdir-doupdate (dirname elt beg-end)
+  ;; Point is at the correct subdir alist position for ELT,
+  ;; BEG-END is the subdir-region (as list of begin and end).
+  (if elt				; subdir was already present
+      ;; update its position (should actually be unchanged)
+      (set-marker (dired-get-subdir-min elt) (point-marker))
+    (dired-alist-add dirname (point-marker)))
+  ;; The hook may depend on the subdir-alist containing the just
+  ;; inserted subdir, so run it after dired-alist-add:
+  (if dired-after-readin-hook
+      (save-excursion
+	(let ((begin (nth 0 beg-end))
+	      (end (nth 1 beg-end)))
+	  (goto-char begin)
+	  (save-restriction
+	    (narrow-to-region begin end)
+	    ;; hook may add or delete lines, but the subdir boundary
+	    ;; marker floats
+	    (run-hooks 'dired-after-readin-hook))))))
+
+(defun dired-tree-lessp (dir1 dir2)
+  ;; Lexicographic order on pathname components, like `ls -lR':
+  ;; DIR1 < DIR2 iff DIR1 comes *before* DIR2 in an `ls -lR' listing,
+  ;;   i.e., iff DIR1 is a (grand)parent dir of DIR2,
+  ;;   or DIR1 and DIR2 are in the same parentdir and their last
+  ;;   components are string-lessp.
+  ;; Thus ("/usr/" "/usr/bin") and ("/usr/a/" "/usr/b/") are tree-lessp.
+  ;; string-lessp could arguably be replaced by file-newer-than-file-p
+  ;;   if dired-actual-switches contained `t'.
+  (setq dir1 (file-name-as-directory dir1)
+	dir2 (file-name-as-directory dir2))
+  (let ((components-1 (dired-split "/" dir1))
+	(components-2 (dired-split "/" dir2)))
+    (while (and components-1
+		components-2
+		(equal (car components-1) (car components-2)))
+      (setq components-1 (cdr components-1)
+	    components-2 (cdr components-2)))
+    (let ((c1 (car components-1))
+	  (c2 (car components-2)))
+
+      (cond ((and c1 c2)
+	     (string-lessp c1 c2))
+	    ((and (null c1) (null c2))
+	     nil)			; they are equal, not lessp
+	    ((null c1)			; c2 is a subdir of c1: c1<c2
+	     t)
+	    ((null c2)			; c1 is a subdir of c2: c1>c2
+	     nil)
+	    (t (error "This can't happen"))))))
+
+;; There should be a builtin split function - inverse to mapconcat.
+(defun dired-split (pat str &optional limit)
+  "Splitting on regexp PAT, turn string STR into a list of substrings.
+Optional third arg LIMIT (>= 1) is a limit to the length of the
+resulting list.
+Thus, if SEP is a regexp that only matches itself,
+
+   (mapconcat 'identity (dired-split SEP STRING) SEP)
+
+is always equal to STRING."
+  (let* ((start (string-match pat str))
+	 (result (list (substring str 0 start)))
+	 (count 1)
+	 (end (if start (match-end 0))))
+    (if end				; else nothing left
+	(while (and (or (not (integerp limit))
+			(< count limit))
+		    (string-match pat str end))
+	  (setq start (match-beginning 0)
+		count (1+ count)
+		result (cons (substring str end start) result)
+		end (match-end 0)
+		start end)
+	  ))
+    (if (and (or (not (integerp limit))
+		 (< count limit))
+	     end)			; else nothing left
+	(setq result
+	      (cons (substring str end) result)))
+    (nreverse result)))
+
+;;; moving by subdirectories
+
+(defun dired-subdir-index (dir)
+  ;; Return an index into alist for use with nth
+  ;; for the sake of subdir moving commands.
+  (let (found (index 0) (alist dired-subdir-alist))
+    (while alist
+      (if (string= dir (car (car alist)))
+	  (setq alist nil found t)
+	(setq alist (cdr alist) index (1+ index))))
+    (if found index nil)))
+
+;;;###autoload
+(defun dired-next-subdir (arg &optional no-error-if-not-found no-skip)
+  "Go to next subdirectory, regardless of level."
+  ;; Use 0 arg to go to this directory's header line.
+  ;; NO-SKIP prevents moving to end of header line, returning whatever
+  ;; position was found in dired-subdir-alist.
+  (interactive "p")
+  (let ((this-dir (dired-current-directory))
+	pos index)
+    ;; nth with negative arg does not return nil but the first element
+    (setq index (- (dired-subdir-index this-dir) arg))
+    (setq pos (if (>= index 0)
+		  (dired-get-subdir-min (nth index dired-subdir-alist))))
+    (if pos
+	(progn
+	  (goto-char pos)
+	  (or no-skip (skip-chars-forward "^\n\r"))
+	  (point))
+      (if no-error-if-not-found
+	  nil				; return nil if not found
+	(error "%s directory" (if (> arg 0) "Last" "First"))))))
+
+;;;###autoload
+(defun dired-prev-subdir (arg &optional no-error-if-not-found no-skip)
+  "Go to previous subdirectory, regardless of level.
+When called interactively and not on a subdir line, go to this subdir's line."
+  ;;(interactive "p")
+  (interactive
+   (list (if current-prefix-arg
+	     (prefix-numeric-value current-prefix-arg)
+	   ;; if on subdir start already, don't stay there!
+	   (if (dired-get-subdir) 1 0))))
+  (dired-next-subdir (- arg) no-error-if-not-found no-skip))
+
+(defun dired-subdir-min ()
+  (save-excursion
+    (if (not (dired-prev-subdir 0 t t))
+	(error "Not in a subdir!")
+      (point))))
+
+;;;###autoload
+(defun dired-goto-subdir (dir)
+  "Go to end of header line of DIR in this dired buffer.
+Return value of point on success, otherwise return nil.
+The next char is either \\n, or \\r if DIR is hidden."
+  (interactive
+   (prog1				; let push-mark display its message
+       (list (expand-file-name
+	      (completing-read "Goto in situ directory: " ; prompt
+			       dired-subdir-alist ; table
+			       nil	; predicate
+			       t	; require-match
+			       (dired-current-directory))))
+     (push-mark)))
+  (setq dir (file-name-as-directory dir))
+  (let ((elt (assoc dir dired-subdir-alist)))
+    (and elt
+	 (goto-char (dired-get-subdir-min elt))
+	 ;; dired-subdir-hidden-p and dired-add-entry depend on point being
+	 ;; at either \r or \n after this function succeeds.
+	 (progn (skip-chars-forward "^\r\n")
+		(point)))))
+
+;;;###autoload
+(defun dired-mark-subdir-files ()
+  "Mark all files except `.' and `..'."
+  (interactive "P")
+  (let ((p-min (dired-subdir-min)))
+    (dired-mark-files-in-region p-min (dired-subdir-max))))
+
+;;;###autoload
+(defun dired-kill-subdir (&optional remember-marks)
+  "Remove all lines of current subdirectory.
+Lower levels are unaffected."
+  ;; With optional REMEMBER-MARKS, return a mark-alist.
+  (interactive)
+  (let ((beg (dired-subdir-min))
+	(end (dired-subdir-max))
+	buffer-read-only cur-dir)
+    (setq cur-dir (dired-current-directory))
+    (if (equal cur-dir default-directory)
+	(error "Attempt to kill top level directory"))
+    (prog1
+	(if remember-marks (dired-remember-marks beg end))
+      (delete-region beg end)
+      (if (eobp)			; don't leave final blank line
+	  (delete-char -1))
+      (dired-unsubdir cur-dir))))
+
+(defun dired-unsubdir (dir)
+  ;; Remove DIR from the alist
+  (setq dired-subdir-alist
+	(delq (assoc dir dired-subdir-alist) dired-subdir-alist)))
+
+;;;###autoload
+(defun dired-tree-up (arg)
+  "Go up ARG levels in the dired tree."
+  (interactive "p")
+  (let ((dir (dired-current-directory)))
+    (while (>= arg 1)
+      (setq arg (1- arg)
+	    dir (file-name-directory (directory-file-name dir))))
+    ;;(setq dir (expand-file-name dir))
+    (or (dired-goto-subdir dir)
+	(error "Cannot go up to %s - not in this tree." dir))))
+
+;;;###autoload
+(defun dired-tree-down ()
+  "Go down in the dired tree."
+  (interactive)
+  (let ((dir (dired-current-directory)) ; has slash
+	pos case-fold-search)		; filenames are case sensitive
+    (let ((rest (reverse dired-subdir-alist)) elt)
+      (while rest
+	(setq elt (car rest)
+	      rest (cdr rest))
+	(if (dired-in-this-tree (directory-file-name (car elt)) dir)
+	    (setq rest nil
+		  pos (dired-goto-subdir (car elt))))))
+    (if pos
+	(goto-char pos)
+      (error "At the bottom"))))
+
+;;; hiding
+
+(defun dired-unhide-subdir ()
+  (let (buffer-read-only)
+    (subst-char-in-region (dired-subdir-min) (dired-subdir-max) ?\r ?\n)))
+
+(defun dired-hide-check ()
+  (or selective-display
+      (error "selective-display must be t for subdir hiding to work!")))
+
+(defun dired-subdir-hidden-p (dir)
+  (and selective-display
+       (save-excursion
+	 (dired-goto-subdir dir)
+	 (looking-at "\r"))))
+
+;;;###autoload
+(defun dired-hide-subdir (arg)
+  "Hide or unhide the current subdirectory and move to next directory.
+Optional prefix arg is a repeat factor.
+Use \\[dired-hide-all] to (un)hide all directories."
+  (interactive "p")
+  (dired-hide-check)
+  (while (>=  (setq arg (1- arg)) 0)
+    (let* ((cur-dir (dired-current-directory))
+	   (hidden-p (dired-subdir-hidden-p cur-dir))
+	   (elt (assoc cur-dir dired-subdir-alist))
+	   (end-pos (1- (dired-get-subdir-max elt)))
+	   buffer-read-only)
+      ;; keep header line visible, hide rest
+      (goto-char (dired-get-subdir-min elt))
+      (skip-chars-forward "^\n\r")
+      (if hidden-p
+	  (subst-char-in-region (point) end-pos ?\r ?\n)
+	(subst-char-in-region (point) end-pos ?\n ?\r)))
+    (dired-next-subdir 1 t)))
+
+;;;###autoload
+(defun dired-hide-all (arg)
+  "Hide all subdirectories, leaving only their header lines.
+If there is already something hidden, make everything visible again.
+Use \\[dired-hide-subdir] to (un)hide a particular subdirectory."
+  (interactive "P")
+  (dired-hide-check)
+  (let (buffer-read-only)
+    (if (save-excursion
+	  (goto-char (point-min))
+	  (search-forward "\r" nil t))
+	;; unhide - bombs on \r in filenames
+	(subst-char-in-region (point-min) (point-max) ?\r ?\n)
+      ;; hide
+      (let ((pos (point-max))		; pos of end of last directory
+	    (alist dired-subdir-alist))
+	(while alist			; while there are dirs before pos
+	  (subst-char-in-region (dired-get-subdir-min (car alist)) ; pos of prev dir
+				(save-excursion
+				  (goto-char pos) ; current dir
+				  ;; we're somewhere on current dir's line
+				  (forward-line -1)
+				  (point))
+				?\n ?\r)
+	  (setq pos (dired-get-subdir-min (car alist)))	; prev dir gets current dir
+	  (setq alist (cdr alist)))))))
+
+;;;###end dired-ins.el