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\input texinfo  @comment -*-texinfo-*-

@c dired-x.texi --- Sebastian Kremer's Extra DIRED hacked up for GNU Emacs19
@c 
@c Author: Sebastian Kremer <sk@thp.uni-koeln.de>
@c	Lawrence R. Dodd <dodd@roebling.poly.edu>
@c [Dodd's address no longer valid.]
@c Version: 2.52
@c Date: 1994/08/09 16:51:31
@c Keywords: dired extensions
@c dired-x.el REVISION NUMBER: 2

@c State: Released
@c Ident: dired-x.texi,v 2.52 1994/08/09 16:51:31 dodd Released

@comment %**start of header (This is for running Texinfo on a region.)
@c FOR GNU EMACS USE ../info/dired-x BELOW
@setfilename ../info/dired-x
@c dired-x.el REVISION NUMBER
@settitle Dired Extra Version 2 User's Manual

@dircategory Emacs
@direntry
* Dired-X: (dired-x).   Dired Extra Features.
@end direntry

@iftex
@finalout
@end iftex
@c @setchapternewpage odd		% For book style double sided manual.
@comment %**end of header (This is for running Texinfo on a region.)
@c      @smallbook
@tex
\overfullrule=0pt
%\global\baselineskip 30pt      % For printing in double spaces
@end tex

@ifinfo
@node Copyright, Top, (dir), (dir)
@comment  node-name,  next,  previous,  up
This documents the ``extra'' features for Dired Mode for GNU Emacs found in
the file @file{dired-x.el}.

Copyright @copyright{} 1993, 1994 Free Software Foundation, Inc.

Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

Permission is granted to copy and distribute modified versions of
this manual under the conditions for verbatim copying, provided that
the entire resulting derived work is distributed under the terms of
a permission notice identical to this one.

Permission is granted to copy and distribute translations of this
manual into another language, under the above conditions for
modified versions, except that this permission notice may be stated
in a translation approved by the Free Software Foundation.

The file used to create this is called @file{dired-x.texi}, but the
original work that was altered to make that file was called
@file{dired.texi} written by Sebastian Kremer.

@ignore
Permission is granted to process this file through TeX and print the
results, provided the printed document carries copying permission
notice identical to this one except for the removal of this paragraph
(this paragraph not being relevant to the printed manual).

@end ignore
@end ifinfo

@c
@titlepage
@sp 6
@c dired-x.el REVISION NUMBER
@center @titlefont{Dired Extra Version 2}
@sp 2
@center @titlefont{For The GNU Emacs}
@sp 1
@center @titlefont{Directory Editor}
@sp 4
@center Manual Revision: 2.52
@center 1994/08/09 16:51:31
@sp 5
@center Lawrence R@. Dodd
@c @center @t{dodd@@roebling.poly.edu}
@sp 5
@center (Based on @file{dired.texi} by Sebastian Kremer <sk@@thp.uni-koeln.de>)
@page
@vskip 0pt plus 1filll
Copyright @copyright{} 1993, 1994 Free Software Foundation

Permission is granted to make and distribute verbatim copies of
this manual provided the copyright notice and this permission notice
are preserved on all copies.

Permission is granted to copy and distribute modified versions of
this manual under the conditions for verbatim copying, provided that
the entire resulting derived work is distributed under the terms of
a permission notice identical to this one.

Permission is granted to copy and distribute translations of this
manual into another language, under the above conditions for
modified versions, except that this permission notice may be stated
in a translation approved by the Free Software Foundation.

The file used to create this is called @file{dired-x.texi}, but the
original work that was altered to make that file was called
@file{dired.texi} written by Sebastian Kremer.

@end titlepage

@page

@ifinfo

@node Top, Introduction, Copyright, (dir)
@comment  node-name,  next,  previous,  up

@noindent
This documents the ``extra'' features for Dired Mode for GNU Emacs that are
provided by the file @file{dired-x.el}.

@itemize @bullet

@item
Based on @file{dired.texi} by Sebastian Kremer <sk@@thp.uni-koeln.de>

@c dired-x.el REVISION NUMBER
@item 
For @file{dired-x.el} revision 2

@c @item 
@c Revision of this manual: 2.52 (1994/08/09 16:51:31)

@c @item
@c Bugs to Lawrence R. Dodd <dodd@@roebling.poly.edu>.  @emph{Please} type
@c @kbd{M-x dired-x-submit-report} to submit a bug report (@pxref{Bugs}).

@c @item
@c You can obtain a copy of this package via anonymous ftp in
@c @t{/roebling.poly.edu:/pub/packages/dired-x.tar.gz}

@end itemize

@menu
* Introduction::
* Installation::
* Omitting Files in Dired::
* Local Variables::
* Shell Command Guessing::
* Virtual Dired::
* Advanced Mark Commands::
* Multiple Dired Directories::
* Find File At Point::
* Miscellaneous Commands::
* Bugs::

* Concept Index::		
* Command Index::	
* Key Index::		
* Variable Index::	

@end menu

@end ifinfo

@node Introduction, Features, Top, Top
@comment  node-name,  next,  previous,  up
@chapter Introduction

This documents the @emph{extra} features for Dired Mode for GNU Emacs.  It
is derived from version 1.191 of Sebastian Kremer's @file{dired-x.el}.

In adopting this @file{dired-x.el} to GNU Emacs v19 some material that has
been incorporated into @file{dired.el} and @file{dired-aux.el} of the GNU Emacs
19 distribution has been removed and some material was modified for agreement
with the functions in @file{dired.el} and @file{dired-aux.el}.  For example,
the code using @code{gmhist} history functions was replaced with code using
the mini-buffer history now built into GNU Emacs.  Finally, a few other
features have been added and a few more functions have been bound to keys.

@ifinfo
@menu
* Features::
* Technical Details::
@end menu
@end ifinfo

@node Features, Technical Details, Introduction, Introduction
@comment  node-name,  next,  previous,  up
@section Features
@cindex Features

Some features provided by Dired Extra

@enumerate
@item
Omitting of uninteresting files from dired listing. 
@itemize @bullet
@xref{Omitting Files in Dired}.
@end itemize
@item
Local variables for dired directories.
@itemize @bullet
@xref{Local Variables}.
@end itemize
@item
Guessing shell commands in dired buffers.
@itemize @bullet
@xref{Shell Command Guessing}.
@end itemize
@item
Running dired command in non-dired buffers.
@itemize @bullet
@xref{Virtual Dired}.
@end itemize
@item
Finding a file mentioned in a buffer
@itemize @bullet
@xref{Find File At Point}.
@end itemize
@item
Commands using file marking.
@itemize @bullet
@xref{Advanced Mark Commands}.
@end itemize
@end enumerate

@noindent
@file{dired-x.el} binds some functions to keys in Dired Mode (@pxref{Key
Index}) and also binds @kbd{C-x C-j} and @kbd{C-x 4 C-j} @emph{globally} to
@code{dired-jump} (@pxref{Miscellaneous Commands}).  It may also bind @kbd{C-x
C-f} and @kbd{C-x 4 C-f} to @code{dired-x-find-file} and
@code{dired-x-find-file-other-window}, respectively (@pxref{Find File At
Point}).

@node Technical Details, Installation, Features, Introduction
@comment  node-name,  next,  previous,  up
@section Technical Details
@cindex Redefined functions
@cindex @file{dired-aux.el}

When loaded this code @emph{redefines} the following functions of GNU Emacs
from @file{dired.el}

@itemize @bullet
@item
@code{dired-clean-up-after-deletion}
@item
@code{dired-find-buffer-nocreate}
@item
@code{dired-initial-position}
@item
@code{dired-up-directory}
@end itemize

@noindent
and the following functions from @file{dired-aux.el}

@itemize @bullet
@item
@code{dired-add-entry}
@item
@code{dired-read-shell-command}
@end itemize

@node Installation, Optional Installation Dired Jump, Technical Details, Top
@comment  node-name,  next,  previous,  up
@chapter Installation

@noindent
This manual describes the dired features provided by the file
@file{dired-x.el}.  To take advantage of these features, you must load the
file and (optionally) set some variables.

@noindent
In your @file{.emacs} file in your home directory, or in the system-wide
initialization file @file{default.el} in the @file{site-lisp} directory, put

@example
(add-hook 'dired-load-hook
          (lambda ()
            (load "dired-x")
            ;; Set dired-x global variables here.  For example:
            ;; (setq dired-guess-shell-gnutar "gtar")
            ;; (setq dired-x-hands-off-my-keys nil)
            ))
(add-hook 'dired-mode-hook
          (lambda ()
            ;; Set dired-x buffer-local variables here.  For example:
            ;; (setq dired-omit-files-p t)
            ))
@end example

@noindent
This will load @file{dired-x.el} when dired is first invoked (for example,
when you first do @kbd{C-x d}).

@ifinfo
@menu
* Optional Installation Dired Jump::
* Optional Installation File At Point::
@end menu
@end ifinfo

@node Optional Installation Dired Jump, Optional Installation File At Point, Installation, Installation
@comment  node-name,  next,  previous,  up
@section Optional Installation Dired Jump

@cindex Autoloading @code{dired-jump} and @code{dired-jump-other-window}

In order to have @code{dired-jump} and @code{dired-jump-other-window}
(@pxref{Miscellaneous Commands}) work @emph{before} @code{dired} and
@code{dired-x} have been properly loaded the user should set-up an autoload
for these functions.  In your @file{.emacs} file put

@example
;;; Autoload `dired-jump' and `dired-jump-other-window'.
;;; We autoload from FILE dired.el.  This will then load dired-x.el 
;;; and hence define `dired-jump' and `dired-jump-other-window'.
(define-key global-map "\C-x\C-j" 'dired-jump)
(define-key global-map "\C-x4\C-j" 'dired-jump-other-window)

(autoload (quote dired-jump) "dired" "\
Jump to dired buffer corresponding to current buffer.
If in a file, dired the current directory and move to file's line.
If in dired already, pop up a level and goto old directory's line.
In case the proper dired file line cannot be found, refresh the dired
buffer and try again." t nil)

(autoload (quote dired-jump-other-window) "dired" "\
Like \\[dired-jump] (dired-jump) but in other window." t nil)
@end example

Note that in recent releases of GNU Emacs 19 (i.e., 19.25 or later) the file
@file{../lisp/loaddefs.el} of the Emacs distribution already contains the
proper auto-loading for @code{dired-jump} so you need only put

@example
(define-key global-map "\C-x\C-j" 'dired-jump)
@end example

@noindent in your @file{.emacs} file in order to have @kbd{C-x C-j} work
before @code{dired} is loaded.

@node Optional Installation File At Point, , Optional Installation Dired Jump, Installation
@comment  node-name,  next,  previous,  up
@section Optional Installation File At Point

@cindex Binding @code{dired-x-find-file}
If you choose to have @file{dired-x.el} bind @code{dired-x-find-file} over
@code{find-file} (@pxref{Find File At Point}), then you will need to set
@code{dired-x-hands-off-my-keys} and make a call to the function
@code{dired-x-bind-find-file} in the @code{dired-load-hook}:

@example
(add-hook 'dired-load-hook 
          (lambda ()
            (load "dired-x")
            ;; Bind dired-x-find-file.
            (setq dired-x-hands-off-my-keys nil)
            ;; Make sure our binding preference is invoked.
            (dired-x-bind-find-file)
            ))
@end example

Alternatively, you can set the variable @emph{before} @file{dired-x.el} is
loaded

@example
(add-hook 'dired-load-hook 
          (lambda ()
            ;; Bind dired-x-find-file.
            (setq dired-x-hands-off-my-keys nil)
            (load "dired-x")
            ))
@end example

@node Omitting Files in Dired, Omitting Variables, , Top
@comment  node-name,  next,  previous,  up
@chapter Omitting Files in Dired

@cindex Omitting Files in Dired
@dfn{Omitting} a file means removing it from the directory listing.  Omitting
is useful for keeping Dired buffers free of ``uninteresting'' files (for
instance, auto-save, auxiliary, backup, and revision control files) so that
the user can concentrate on the interesting files.  Like hidden files, omitted
files are never seen by Dired.  Omitting differs from hiding in several
respects:

@itemize @bullet

@item
Omitting works on individual files, not on directories; an entire directory
cannot be omitted (though each of its files could be).

@item
Omitting is wholesale; if omitting is turned on for a dired buffer, then all
uninteresting files listed in that buffer are omitted.  The user does not omit
(or unomit) files one at a time.

@item
Omitting can be automatic; uninteresting file lines in the buffer can be
removed before the user ever sees them.

@item
Marked files are never omitted.
@end itemize

@table @kbd
@item M-o
@kindex M-o
@findex dired-omit-toggle
(@code{dired-omit-toggle}) Toggle between displaying and omitting
``uninteresting'' files.  With a prefix argument, don't toggle and just mark
the files, but don't actually omit them.
@end table

@noindent
In order to make Dired Omit work you first need to load @file{dired-x.el}
inside @code{dired-load-hook} (@pxref{Installation}) and then set
@code{dired-omit-files-p} in some way (@pxref{Omitting Variables}).

@ifinfo
@menu
* Omitting Variables::
* Omitting Examples::
* Omitting Technical::
@end menu
@end ifinfo

@node Omitting Variables, Omitting Examples, Omitting Files in Dired, Omitting Files in Dired
@comment  node-name,  next,  previous,  up

@section Omitting Variables

The following variables can be used to customize omitting.

@table @code

@vindex dired-omit-files-p
@item dired-omit-files-p

Default: @code{nil}

@cindex How to make omitting the default in Dired
If non-@code{nil}, ``uninteresting'' files are not listed.  Uninteresting
files are those whose filenames match regexp @code{dired-omit-files}, plus
those ending with extensions in @code{dired-omit-extensions}.  @kbd{M-o}
(@code{dired-omit-toggle}) toggles its value, which is buffer-local.  Put

@example
(setq dired-omit-files-p t)
@end example

inside your @code{dired-mode-hook} to have omitting initially turned on in
@emph{every} Dired buffer (@pxref{Installation}).  You can then use @kbd{M-o} to
unomit in that buffer.

To enable omitting automatically only in certain directories one can use Dired
Local Variables and put

@example
Local Variables:
dired-omit-files-p: t
End:
@end example

@noindent
into a file @file{.dired} (the default value of
@code{dired-local-variables-file}) in that directory (@pxref{Local Variables}).

@table @code
@findex dired-omit-here-always
@item dired-omit-here-always

This is an interactive function that creates a local variables file exactly
like the example above (if it does not already exist) in the file
@code{dired-local-variables-file} in the current directory and then refreshes
the directory listing (@pxref{Local Variables}).
@end table

@vindex dired-omit-files
@item dired-omit-files

Default: @code{"^#\\|\\.$"}

Filenames matching this buffer-local regexp will not be displayed.
This only has effect when @code{dired-omit-files-p} is t.

The default value omits the special directories @file{.} and @file{..}  and
autosave files (plus other files ending in ``.'') (@pxref{Omitting Examples}).

@vindex dired-omit-extensions
@item dired-omit-extensions

Default: The elements of @code{completion-ignored-extensions} (as defined in
the file @file{loaddefs.el} of the GNU Emacs distribution),
@code{dired-latex-unclean-extensions}, @code{dired-bibtex-unclean-extensions}
and @code{dired-texinfo-unclean-extensions}.

If non-@code{nil}, a list of extensions (strings) to omit from Dired listings.
Its format is the same as that of @code{completion-ignored-extensions}.

@vindex dired-omit-localp
@item dired-omit-localp

Default:  @code{'no-dir}

The @var{localp} argument @code{dired-omit-expunge} passes to
@code{dired-get-filename}.  If it is @code{'no-dir}, omitting is much faster,
but you can only match against the non-directory part of the filename.  Set it
to @code{nil} if you need to match the whole pathname or @code{t} to match the
pathname relative to the buffer's top-level directory.

@item dired-omit-marker-char
@vindex dired-omit-marker-char
@cindex Omitting additional files
Default: @kbd{C-o}

Temporary marker used by by Dired to implement omitting.  Should never be used
as marker by the user or other packages.  There is one exception to this rule:
by doing

@example
(setq dired-mark-keys "\C-o")
;; i.e., the value of dired-omit-marker-char
;; (which is not defined yet)
@end example

anywhere in your @file{~/.emacs}, you will bind the @kbd{C-o} key to insert a
@kbd{C-o} marker, thus causing these files to be omitted in addition to the
usually omitted files.  Unfortunately the files you omitted manually this way
will show up again after reverting the buffer, unlike the others.

@end table

@node Omitting Examples, Omitting Technical, Omitting Variables, Omitting Files in Dired
@comment  node-name,  next,  previous,  up
@section Examples of Omitting Various File Types

@itemize @bullet

@item
@cindex RCS files, how to omit them in Dired
@cindex Omitting RCS files in Dired
If you wish to avoid seeing RCS files and the RCS directory, then put

@example
(setq dired-omit-files
      (concat dired-omit-files "\\|^RCS$\\|,v$"))
@end example
@noindent
in the @code{dired-load-hook} (@pxref{Installation}).  This assumes
@code{dired-omit-localp} has its default value of @code{'no-dir} to make the
@code{^}-anchored matches work.  As a slower alternative, with
@code{dired-omit-localp} set to @code{nil}, you can use @code{/} instead of
@code{^} in the regexp.

@item
@cindex Tib files, how to omit them in Dired
@cindex Omitting tib files in Dired
If you use tib, the bibliography program for use with @TeX{} and La@TeX{}, you
might want to omit the @file{INDEX} and the @file{-t.tex} files, then put

@example
(setq dired-omit-files
      (concat dired-omit-files "\\|^INDEX$\\|-t\\.tex$"))
@end example

@noindent
in the @code{dired-load-hook} (@pxref{Installation}).

@item
@cindex Dot files, how to omit them in Dired
@cindex Omitting dot files in Dired
If you do not wish to see @samp{dot} files (files starting with a @samp{.}),
then put

@example
(setq dired-omit-files
      (concat dired-omit-files "\\|^\\..+$"))
@end example

@noindent
in the @code{dired-load-hook} (@pxref{Installation}).

@end itemize

@node Omitting Technical, Local Variables, Omitting Examples, Omitting Files in Dired
@comment  node-name,  next,  previous,  up
@section Some Technical Details of Omitting

Loading @file{dired-x.el} will install Dired Omit by putting
@code{dired-omit-expunge} on your @code{dired-after-readin-hook}, and will
call @code{dired-extra-startup}, which in turn calls @code{dired-omit-startup}
in your @code{dired-mode-hook}.

@node Local Variables, Shell Command Guessing, Omitting Technical, Top
@comment  node-name,  next,  previous,  up
@chapter Local Variables for Dired Directories

@cindex Local Variables for Dired Directories
@vindex dired-local-variables-file
@vindex dired-enable-local-variables
@noindent
When Dired visits a directory, it looks for a file whose name is the value of
variable @code{dired-local-variables-file} (default: @file{.dired}).  If such
a file is found, Dired will temporarily insert it into the Dired buffer and
run @code{hack-local-variables}.  

@noindent
For example, if the user puts

@example
Local Variables:
dired-actual-switches: "-lat"
dired-omit-files-p: t
End:
@end example

@noindent
into a file called @file{.dired} in a directory then when that directory is
viewed it will be

@enumerate
@item
sorted by date 
@item
omitted automatically
@end enumerate

@noindent
You can set @code{dired-local-variables-file} to @code{nil} to suppress this.
The value of @code{dired-enable-local-variables} controls if and how these
local variables are read.  This variable exists so that if may override the
default value of @code{enable-local-variables}.  

@noindent
Please see the GNU Emacs Manual to learn more about local variables.
@xref{File Variables,Local Variables in Files,Local Variables in
Files,emacs,The GNU Emacs Manual}.

@noindent
The following variables affect Dired Local Variables

@table @code
@vindex dired-local-variables-file
@item dired-local-variables-file
Default: @code{".dired"}

If non-@code{nil}, filename for local variables for Dired.  If Dired finds a
file with that name in the current directory, it will temporarily insert it
into the dired buffer and run `hack-local-variables'.

@vindex dired-enable-local-variables
@item dired-enable-local-variables
Default: @code{t}

Controls use of local-variables lists in dired.  The value can be @code{t},
@code{nil}, or something else.  A value of @code{t} means local-variables
lists are obeyed in the @code{dired-local-variables-file}; @code{nil} means
they are ignored; anything else means query.  This variable temporarily
overrides the value of @code{enable-local-variables} when the Dired Local
Variables are hacked.
@end table

@node Shell Command Guessing, Virtual Dired, Local Variables, Top
@comment  node-name,  next,  previous,  up
@chapter Shell Command Guessing
@cindex Guessing shell commands for files.

Based upon the name of a filename, Dired tries to guess what shell
command you might want to apply to it.  For example, if you have point
on a file named @file{foo.tar} and you press @kbd{!}, Dired will guess
you want to @samp{tar xvf} it and suggest that as the default shell
command.

The default will be mentioned in brackets and you can type @kbd{M-p} to get
the default into the minibuffer so that you can edit it, e.g., changing
@samp{tar xvf} to @samp{tar tvf}.  If there are several commands for a given
file, e.g., @samp{xtex} and @samp{dvips} for a @file{.dvi} file, you can type
@kbd{M-p} several times to see each of the matching commands.

Dired only tries to guess a command for a single file, never for a list
of marked files.

@table @code
@item dired-guess-shell-alist-default
@vindex dired-guess-shell-alist-default
Predefined rules for shell commands.  Set this to @code{nil} to turn guessing off.
The elements of @code{dired-guess-shell-alist-user} (defined by the
user) will override these rules.@refill

@item dired-guess-shell-alist-user
@vindex dired-guess-shell-alist-user
If non-@code{nil}, a user-defined alist of file regexps and their suggested
commands.  These rules take precedence over the predefined rules in the
variable @code{dired-guess-shell-alist-default} (to which they are prepended)
when @code{dired-do-shell-command} is run).
@refill

Each element of the alist looks like

@example
(@var{regexp} @var{command}@dots{})
@end example

where each @var{command} can either be a string or a lisp expression
that evaluates to a string.  If several @var{COMMAND}s are given, all
will temporarily be pushed on the history.

You can set this variable in your @file{~/.emacs}.  For example,
to add rules for @samp{.foo} and @samp{.bar} file extensions, write

@example
(setq dired-guess-shell-alist-user
      (list
       (list "\\.foo$" "@var{foo-command}");; fixed rule
       ;; possibly more rules...
       (list "\\.bar$";; rule with condition test
              '(if @var{condition}
                   "@var{bar-command-1}"
                 "@var{bar-command-2}"))))
@end example

@noindent
This will override any predefined rules for the same extensions.

@item dired-guess-shell-gnutar
@vindex dired-guess-shell-gnutar
@cindex Passing GNU tar its `z' switch.
Default: @code{nil}

If non-@code{nil}, name of the GNU tar executable (e.g., @samp{"tar"} or
@samp{"gnutar"}).  GNU tar's @samp{z} switch is used for compressed tar files.
If you don't have GNU tar, set this to @code{nil}: a pipe using @samp{zcat} is
then used.

@item dired-guess-shell-gzip-quiet
@vindex dired-guess-shell-gzip-quiet
@cindex GNU zip.
Default: @code{t}

A non-@code{nil} value means that @code{-q} is passed to gzip overriding a
verbose GNU zip's @env{GZIP} environment variable.

@item dired-guess-shell-znew-switches nil
@vindex dired-guess-shell-znew-switches nil
@cindex GNU zip.
Default: @code{nil}

A string of switches passed to GNU zip's @file{znew}.  An example is
@samp{"-K"} which will make @file{znew} keep a .Z file when it is smaller than
the .gz file.

@item dired-shell-command-history nil
@vindex dired-shell-command-history nil

History list for commands that read dired-shell commands.
@end table

@node Virtual Dired, Advanced Mark Commands, Shell Command Guessing, Top
@comment  node-name,  next,  previous,  up
@chapter Virtual Dired

@cindex Virtual Dired
@cindex Perusing ls listings
@cindex ls listings, how to peruse them in Dired
Using @dfn{Virtual Dired} means putting a buffer with Dired-like
contents in Dired mode.  The files described by the buffer contents need
not actually exist.  This is useful if you want to peruse an @samp{ls -lR}
output file, for example one you got from an FTP server.  You can use
all motion commands usually available in Dired.  You can also use
it to save a Dired buffer in a file and resume it in a later session.

@findex dired-virtual
@kindex g
@findex dired-virtual-revert
Type @kbd{M-x dired-virtual} to put the current buffer into virtual
Dired mode.  You will be prompted for the top level directory of this
buffer, with a default value guessed from the buffer contents.  To
convert the virtual to a real Dired buffer again, type @kbd{g} (which
calls @code{dired-virtual-revert}) in the virtual Dired buffer and
answer @samp{y}.  You don't have to do this, though: you can relist
single subdirectories using @kbd{l} (@code{dired-do-redisplay}) on the subdirectory
headerline, leaving the buffer in virtual Dired mode all the time.

@findex dired-virtual-mode
@vindex auto-mode-alist
The function @samp{dired-virtual-mode} is specially designed to turn on
virtual Dired mode from the @code{auto-mode-alist}.  To edit all
@file{*.dired} files automatically in virtual Dired mode, put this into your
@file{~/.emacs}:

@example
(setq auto-mode-alist (cons '("[^/]\\.dired$" . dired-virtual-mode)
                              auto-mode-alist))
@end example

The regexp is a bit more complicated than usual to exclude ".dired"
local variable files.

@node Advanced Mark Commands, Advanced Cleaning Functions, Virtual Dired, Top
@comment  node-name,  next,  previous,  up
@chapter Advanced Mark Commands

@table @kbd
@item F
@kindex F
@cindex Visiting several files at once
@cindex Simultaneous visiting of several files
@findex dired-do-find-marked-files
(@code{dired-do-find-marked-files}) Find all marked files at once displaying
simultaneously.  If optional NOSELECT is non-@code{nil} then just find the
files but do not select.  If you want to keep the dired buffer displayed, type
@kbd{C-x 2} first.  If you want just the marked files displayed and nothing
else, type @kbd{C-x 1} first.

The current window is split across all files marked, as evenly as possible.
Remaining lines go to the bottom-most window.  The number of files that can be
displayed this way is restricted by the height of the current window and the
variable @code{window-min-height}.
@end table

@table @code
@item dired-mark-extension
@findex dired-mark-extension
Mark all files with a certain extension for use in later commands.  A @samp{.}
is not automatically prepended to the string entered.

When called from lisp, @var{extension} may also be a list of extensions
and an optional argument @var{marker-char} specifies the marker used.

@item dired-flag-extension
@findex dired-flag-extension
Flag all files with a certain extension for deletion.  A @samp{.} is
@emph{not} automatically prepended to the string entered.
@end table

@ifinfo
@menu
* Advanced Cleaning Functions::
* Advanced Cleaning Variables::
* Special Marking Function::
@end menu
@end ifinfo

@node Advanced Cleaning Functions, Advanced Cleaning Variables, Advanced Mark Commands, Advanced Mark Commands
@comment  node-name,  next,  previous,  up

@section Advanced Cleaning Functions

@table @code
@item dired-clean-patch
@findex dired-clean-patch
Flag dispensable files created by the @samp{patch} program for deletion.  See
variable @code{dired-patch-unclean-extensions}.

@item dired-clean-tex
@findex dired-clean-tex
Flag dispensable files created by @TeX{}, La@TeX{}, and @samp{texinfo} for
deletion.  See the following variables (@pxref{Advanced Cleaning Variables}):

@itemize @bullet
@item
@code{dired-tex-unclean-extensions}
@item
@code{dired-texinfo-unclean-extensions}
@item
@code{dired-latex-unclean-extensions}
@item
@code{dired-bibtex-unclean-extensions}
@end itemize

@item dired-very-clean-tex
@findex dired-very-clean-tex
Flag dispensable files created by @TeX{}, La@TeX{}, @samp{texinfo}, and ".dvi"
files for deletion.
@end table

@node Advanced Cleaning Variables, Special Marking Function, Advanced Cleaning Functions, Advanced Mark Commands
@comment  node-name,  next,  previous,  up

@section Advanced Cleaning Variables

@noindent Variables used by the above cleaning commands (and in the default value for
variable @code{dired-omit-extensions}, @pxref{Omitting Variables})

@table @code
@item dired-patch-unclean-extensions
@vindex dired-patch-unclean-extensions
Default: @code{'(".rej" ".orig")}

List of extensions of dispensable files created by the @samp{patch} program.

@item dired-tex-unclean-extensions
@vindex dired-tex-unclean-extensions
Default:  @code{'(".toc" ".log" ".aux")}

List of extensions of dispensable files created by @TeX{}.

@item dired-texinfo-unclean-extensions
@vindex dired-texinfo-unclean-extensions
Default: @code{'(".cp" ".cps" ".fn" ".fns" ".ky" ".kys"}
@code{".pg" ".pgs" ".tp" ".tps" ".vr" ".vrs")}

List of extensions of dispensable files created by @samp{texinfo}.

@item dired-latex-unclean-extensions
@vindex dired-latex-unclean-extensions
Default: @code{'(".idx" ".lof" ".lot" ".glo")}

List of extensions of dispensable files created by La@TeX{}.

@item dired-bibtex-unclean-extensions
@vindex dired-bibtex-unclean-extensions
Default:  @code{'(".blg" ".bbl")}

List of extensions of dispensable files created by Bib@TeX{}.
@end table

@node Special Marking Function, Multiple Dired Directories, Advanced Cleaning Variables, Advanced Mark Commands
@comment  node-name,  next,  previous,  up

@section Special Marking Function

@table @kbd
@item M-(
@kindex M-(
@findex dired-mark-sexp
@cindex Lisp expression, marking files with in Dired
@cindex Mark file by lisp expression
(@code{dired-mark-sexp}) Mark files for which @var{predicate} returns
non-@code{nil}.  With a prefix argument, unflag those files instead.

The @var{predicate} is a lisp expression that can refer to the following
symbols:
@table @code
@item inode
[@i{integer}] the inode of the file (only for @samp{ls -i} output)
@item s
[@i{integer}] the size of the file for @samp{ls -s} output (usually in blocks or,
with @samp{-k}, in KBytes)
@item mode
[@i{string}]  file permission bits, e.g., @samp{"-rw-r--r--"}
@item nlink
[@i{integer}] number of links to file
@item uid
[@i{string}]  owner
@item gid
[@i{string}]  group  (If the gid is not displayed by @samp{ls}, this
will still be set (to the same as uid))
@item size
[@i{integer}] file size in bytes
@item time
[@i{string}]  the time that @samp{ls} displays, e.g., @samp{"Feb 12 14:17"}
@item name
[@i{string}]  the name of the file
@item sym
[@i{string}]  if file is a symbolic link, the linked-to name, else @samp{""}
@end table

@noindent
For example, use
@example
(equal 0 size)
@end example
to mark all zero length files.

To find out all not yet compiled Emacs lisp files in a directory, dired
all @file{.el} files in the lisp directory using the wildcard
@samp{*.el}.  Then use @kbd{M-(} with
@example
(not (file-exists-p (concat name "c")))
@end example
to mark all @file{.el} files without a corresponding @file{.elc} file.

@end table

@node Multiple Dired Directories, Find File At Point, Special Marking Function, Top
@comment  node-name,  next,  previous,  up
@chapter Multiple Dired Directories and Non-Dired Commands

@cindex Multiple Dired directories
@cindex Working directory
An Emacs buffer can have but one working directory, stored in the
buffer-local variable @code{default-directory}.  A Dired buffer may have
several subdirectories inserted, but still has but one working
directory: that of the top level Dired directory in that buffer.  For
some commands it is appropriate that they use the current Dired
directory instead of @code{default-directory}, e.g., @code{find-file} and
@code{compile}.

A general mechanism is provided for special handling of the working
directory in special major modes:

@table @code
@item default-directory-alist
@vindex default-directory-alist
Default: @code{((dired-mode . (dired-current-directory)))}

Alist of major modes and their opinion on @code{default-directory}, as a
lisp expression to evaluate.  A resulting value of @code{nil} is ignored
in favor of @code{default-directory}.

@item default-directory
@findex default-directory
Function with usage like variable @code{default-directory}, but knows about the
special cases in variable @code{default-directory-alist}.
@end table

@node Find File At Point, Miscellaneous Commands, Multiple Dired Directories, Top
@comment  node-name,  next,  previous,  up

@section Find File At Point
@cindex Visiting a file mentioned in a buffer
@cindex Finding a file at point

@file{dired-x} provides a method of visiting or editing a file mentioned in
the buffer you are viewing (e.g., a mail buffer, a news article, a README
file, etc.) or to test if that file exists.  You can then modify this in the
minibuffer after snatching the filename.

When installed @file{dired-x} will substitute @code{dired-x-find-file} for
@code{find-file} (normally bound to @kbd{C-x C-f}) and
@code{dired-x-find-file-other-window} for @code{find-file-other-window}
(normally bound to @kbd{C-x 4 C-f}).

In order to use this feature, you will need to set
@code{dired-x-hands-off-my-keys} to @code{nil} inside @code{dired-load-hook}
(@pxref{Optional Installation File At Point}).

@table @code
@item dired-x-find-file
@findex dired-x-find-file
@kindex C-x C-f

@code{dired-x-find-file} behaves exactly like @code{find-file} (normally bound
to @kbd{C-x C-f}) unless a prefix argument is passed to the function in which
case it will use the filename at point as a guess for the file to visit.

For example, if the buffer you were reading contained the words

@example
Available via anonymous ftp in

   /roebling.poly.edu:/pub/lisp/crypt++.el.gz
@end example

then you could move your cursor to the line containing the ftp address and
type @kbd{C-u C-x C-f} (the @kbd{C-u} is a universal argument).  The
minibuffer would read

@example
Find file: /roebling.poly.edu:/pub/lisp/crypt++.el.gz
@end example

with the point after the last @code{/}.  If you hit return emacs will visit
the file at that address.  This also works with files on your own computer.

@item dired-x-find-file-other-window
@findex dired-x-find-file-other-window
@kindex C-x 4 C-f

@code{dired-x-find-file-other-window} behaves exactly like
@code{find-file-other-window} (normally bound to @kbd{C-x 4 C-f}) unless a
prefix argument is used.  See @code{dired-x-find-file} for more information.

@item dired-x-hands-off-my-keys
@vindex dired-x-hands-off-my-keys
If set to @code{t}, then it means that @file{dired-x} should @emph{not} bind
@code{dired-x-find-file} over @code{find-file} on keyboard.  Similarly, it
should not bind @code{dired-x-find-file-other-window} over
@code{find-file-other-window}.  If you change this variable after
@file{dired-x.el} is loaded then do @kbd{M-x dired-x-bind-find-file}.  The
default value of this variable is @kbd{t}; by default, the binding is not
done.  See @xref{Optional Installation File At Point}.

@item dired-x-bind-find-file
@findex dired-x-bind-find-file
A function, which can be called interactively or in your @file{~/.emacs} file,
that uses the value of @code{dired-x-hands-off-my-keys} to determine if
@code{dired-x-find-file} should be bound over @code{find-file} and
@code{dired-x-find-file-other-window} bound over
@code{find-file-other-window}.  See @xref{Optional Installation File At Point}.
@end table

@node Miscellaneous Commands, Bugs, Find File At Point, Top
@comment  node-name,  next,  previous,  up
@chapter Miscellaneous Commands

Miscellaneous features not fitting anywhere else:

@table @code
@item dired-find-subdir
@vindex dired-find-subdir
Default: @code{nil}

If non-@code{nil}, Dired does not make a new buffer for a directory if it can
be found (perhaps as subdirectory) in some existing Dired buffer.

If there are several Dired buffers for a directory, the most recently
used is chosen.

Dired avoids switching to the current buffer, so that if you have a
normal and a wildcard buffer for the same directory, @kbd{C-x d RET}
will toggle between those two.
@end table

@table @kbd
@findex dired-goto-file
@kindex M-g
@item M-g
(@code{dired-goto-file}) Goto file line of a file (or directory).

@findex dired-goto-subdir
@kindex M-G
@item M-G
(@code{dired-goto-subdir}) Goto headerline of an inserted directory.
This commands reads its argument with completion over the names of the
inserted subdirectories.
@end table

@table @kbd
@item w
@cindex Adding to the kill ring in dired.
@kindex w
@findex dired-copy-filename-as-kill
(@code{dired-copy-filename-as-kill}) The @kbd{w} command puts the names
of the marked (or next @var{N}) files into the kill ring, as if you had
killed them with @kbd{C-w}.  With a zero prefix argument @var{N}=0, use the
complete pathname of each file.  With a raw (just @kbd{C-u}) prefix argument,
use the relative pathname of each marked file.  As a special case, if no
prefix argument is given and point is on a directory headerline, it
gives you the name of that directory, without looking for marked files.

@vindex dired-marked-files
The list of names is also stored onto the variable @code{dired-marked-files}
for use, e.g., in the @kbd{M-:} (@code{eval-expression}) command.

As this command also displays what was pushed onto the kill ring you can
use it to display the list of currently marked files in the
echo area (unless you happen to be on a subdirectory headerline).

You can then feed the file name to other Emacs commands with @kbd{C-y}.
For example, say you want to rename a long filename to a slightly
different name.  First type @kbd{w} to push the old name onto the kill
ring.  Then type @kbd{R} to rename it and use @kbd{C-y} inside @kbd{R}'s
minibuffer prompt to insert the old name at a convenient place.

@item T
@kindex T
@cindex Toggling marks.
@findex dired-do-toggle
(@code{dired-do-toggle}) Toggle marks.  That is, currently marked
files become unmarked and vice versa.  Files marked with other flags
(such as `D') are not affected.  The special directories `.' and `..'
are never toggled.
@end table

@table @code
@item dired-smart-shell-command
@findex dired-smart-shell-command
@findex shell-command
@kindex M-!
Like function @code{shell-command}, but in the current Dired directory.
Bound to @kbd{M-!} in Dired buffers.

@item dired-jump
@findex dired-jump
@kindex C-x C-j
@cindex Jumping to dired listing containing file.
Bound to @kbd{C-x C-j}.  Jump back to dired: If in a file, dired the current
directory and move to file's line.  If in Dired already, pop up a level and
goto old directory's line.  In case the proper Dired file line cannot be
found, refresh the Dired buffer and try again.

@item dired-jump-other-window
@findex dired-jump-other-window
@kindex C-x 4 C-j
Bound to @kbd{C-x 4 C-j}. Like @code{dired-jump}, but to other window.

These functions can be autoloaded so they work even though @file{dired-x.el}
has not been loaded yet (@pxref{Optional Installation Dired Jump}).

@vindex dired-bind-jump
If the variable @code{dired-bind-jump} is @code{nil}, @code{dired-jump} will not be
bound to @kbd{C-x C-j} and @code{dired-jump-other-window} will not be bound to
@kbd{C-x 4 C-j}.

@item dired-vm
@cindex Reading mail.
@kindex V
@findex dired-vm
Bound to @kbd{V} if @code{dired-bind-vm} is t.  Run VM on this file (assumed
to be a UNIX mail folder).

@vindex dired-vm-read-only-folders
If you give this command a prefix argument, it will visit the folder
read-only.  This only works in VM~5, not VM~4.

If the variable @code{dired-vm-read-only-folders} is t, @code{dired-vm} will
visit all folders read-only.  If it is neither @code{nil} nor @code{t}, e.g.,
the symbol @code{'if-file-read-only}, only files not writable by you are
visited read-only.  This is the recommended value if you run VM 5.

@vindex dired-bind-vm
If the variable @code{dired-bind-vm} is t, @code{dired-vm} will be bound to
@kbd{V}.  Otherwise, @code{dired-bind-rmail} will be bound.

@item dired-rmail
@cindex Reading mail.
@findex dired-rmail
Bound to @kbd{V} if @code{dired-bind-vm} is @code{nil}.  Run Rmail on this
file (assumed to be mail folder in Rmail/BABYL format).

@item dired-info
@kindex I
@cindex Running info.
@findex dired-info
Bound to @kbd{I}.  Run Info on this file (assumed to be a file in Info
format).

@vindex dired-bind-info
If the variable @code{dired-bind-info} is @code{nil}, @code{dired-info} will
not be bound to I.

@item dired-man
@cindex Running man.
@kindex N
@findex dired-man
Bound to @kbd{N}.  Run man on this file (assumed to be a file in nroff
format).

@vindex dired-bind-man
If the variable @code{dired-bind-man} is @code{nil}, @code{dired-man} will not
be bound to N.

@item dired-do-relative-symlink
@cindex Relative symbolic links.
@kindex Y
@findex dired-do-relative-symlink
Bound to @kbd{Y}.  Relative symlink all marked (or next ARG) files into a
directory, or make a relative symbolic link to the current file.  This creates
relative symbolic links like

    foo -> ../bar/foo

not absolute ones like

    foo -> /ugly/path/that/may/change/any/day/bar/foo

@item dired-do-relative-symlink-regexp
@kindex %Y
@findex dired-do-relative-symlink-regexp
Bound to @kbd{%Y}.  Relative symlink all marked files containing REGEXP to
NEWNAME.  See functions `dired-do-rename-regexp' and `dired-do-relsymlink' for
more info.
@end table

@node Bugs, Concept Index, Miscellaneous Commands, Top
@comment  node-name,  next,  previous,  up
@chapter Bugs
@cindex Bugs
@findex dired-x-submit-report

@noindent
If you encounter a bug in this package, wish to suggest an
enhancement, or want to make a smart remark, then type

@example
@kbd{M-x dired-x-submit-report} 
@end example

@noindent
to set up an outgoing mail buffer, with the proper address to the
@file{dired-x.el} maintainer automatically inserted in the @samp{To:@:} field.
This command also inserts information that the Dired X maintainer can use to
recreate your exact setup, making it easier to verify your bug or social
maladjustment.

Lawrence R. Dodd 
@c <dodd@@roebling.poly.edu>

@node     Concept Index, Command Index, Bugs, Top
@comment  node-name,  next,  previous,  up
@unnumbered Concept Index
@printindex cp

@node     Command Index, Key Index, Concept Index, Top
@comment  node-name,  next,  previous,  up
@unnumbered Function Index
@printindex fn

@node     Key Index, Variable Index, Command Index, Top
@comment  node-name,  next,  previous,  up
@unnumbered Key Index
@printindex ky

@node     Variable Index,  , Key Index, Top
@comment  node-name,  next,  previous,  up
@unnumbered Variable Index
@printindex vr

@setchapternewpage odd
@c @summarycontents
@contents

@bye
@c dired-x.texi ends here.