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LESSKEY(1)									       LESSKEY(1)

       lesskey - specify key bindings for less

       lesskey [-o output] [--] [input]
       lesskey [--output=output] [--] [input]
       lesskey -V
       lesskey --version

       Lesskey	is used to specify a set of key bindings to be used by less.  The input file is a
       text file which describes the key bindings, If the input file is "-",  standard	input  is
       read.  If no input file is specified, a standard filename is used as the name of the input
       file, which depends on the system being used: On Unix systems, $HOME/.lesskey is used;  on
       MS-DOS  systems, $HOME/_lesskey is used; and on OS/2 systems $HOME/lesskey.ini is used, or
       $INIT/lesskey.ini if $HOME is undefined.  The output file is a binary file which  is  used
       by less.  If no output file is specified, and the environment variable LESSKEY is set, the
       value of LESSKEY is used as the name of the output file.  Otherwise, a  standard  filename
       is  used  as  the name of the output file, which depends on the system being used: On Unix
       and OS-9 systems, $HOME/.less is used; on MS-DOS systems, $HOME/_less is used; and on OS/2
       systems,  $HOME/less.ini  is used, or $INIT/less.ini if $HOME is undefined.  If the output
       file already exists, lesskey will overwrite it.

       The -V or --version option causes lesskey to print  its	version  number  and  immediately
       exit.  If -V or --version is present, other options and arguments are ignored.

       The  input  file  consists  of one or more sections.  Each section starts with a line that
       identifies the type of section.	Possible sections are:

	      Defines new command keys.

	      Defines new line-editing keys.

       #env   Defines environment variables.

       Blank lines and lines which start with a pound sign (#) are ignored, except for	the  spe-
       cial section header lines.

       The command section begins with the line


       If  the	command  section is the first section in the file, this line may be omitted.  The
       command section consists of lines of the form:

	    string <whitespace> action [extra-string] <newline>

       Whitespace is any sequence of one or more spaces and/or tabs.  The string is  the  command
       key(s)  which invoke the action.  The string may be a single command key, or a sequence of
       up to 15 keys.  The action is the name of the less action, from the list below.	The char-
       acters in the string may appear literally, or be prefixed by a caret to indicate a control
       key.  A backslash followed by one to three octal digits may be used to specify a character
       by its octal value.  A backslash followed by certain characters specifies input characters
       as follows:

       \b     BACKSPACE

       \e     ESCAPE

       \n     NEWLINE

       \r     RETURN

       \t     TAB

       \ku    UP ARROW

       \kd    DOWN ARROW

       \kr    RIGHT ARROW

       \kl    LEFT ARROW

       \kU    PAGE UP

       \kD    PAGE DOWN

       \kh    HOME

       \ke    END

       \kx    DELETE

       A backslash followed by any other character indicates that character is to be taken liter-
       ally.   Characters  which  must be preceded by backslash include caret, space, tab and the
       backslash itself.

       An action may be followed by an "extra" string.	When such a command is entered while run-
       ning  less,  the  action  is performed, and then the extra string is parsed, just as if it
       were typed in to less.  This feature can be used in certain cases to extend the	function-
       ality of a command.  For example, see the "{" and ":t" commands in the example below.  The
       extra string has a special meaning for the "quit" action: when less quits, first character
       of the extra string is used as its exit status.

       The following input file describes the set of default command keys used by less:

	    \r	      forw-line
	    \n	      forw-line
	    e	      forw-line
	    j	      forw-line
	    \kd  forw-line
	    ^E	      forw-line
	    ^N	      forw-line
	    k	      back-line
	    y	      back-line
	    ^Y	      back-line
	    ^K	      back-line
	    ^P	      back-line
	    J	      forw-line-force
	    K	      back-line-force
	    Y	      back-line-force
	    d	      forw-scroll
	    ^D	      forw-scroll
	    u	      back-scroll
	    ^U	      back-scroll
	    \40  forw-screen
	    f	      forw-screen
	    ^F	      forw-screen
	    ^V	      forw-screen
	    \kD  forw-screen
	    b	      back-screen
	    ^B	      back-screen
	    \ev       back-screen
	    \kU  back-screen
	    z	      forw-window
	    w	      back-window
	    \e\40	   forw-screen-force
	    F	      forw-forever
	    R	      repaint-flush
	    r	      repaint
	    ^R	      repaint
	    ^L	      repaint
	    \eu       undo-hilite
	    g	      goto-line
	    \kh  goto-line
	    <	      goto-line
	    \e<       goto-line
	    p	      percent
	    %	      percent
	    \e[       left-scroll
	    \e]       right-scroll
	    \e(       left-scroll
	    \e)       right-scroll
	    {	      forw-bracket {}
	    }	      back-bracket {}
	    (	      forw-bracket ()
	    )	      back-bracket ()
	    [	      forw-bracket []
	    ]	      back-bracket []
	    \e^F      forw-bracket
	    \e^B      back-bracket
	    G	      goto-end
	    \e>       goto-end
	    >	      goto-end
	    \ke  goto-end
	    =	      status
	    ^G	      status
	    :f	      status
	    /	      forw-search
	    ?	      back-search
	    \e/       forw-search *
	    \e?       back-search *
	    n	      repeat-search
	    \en       repeat-search-all
	    N	      reverse-search
	    \eN       reverse-search-all
	    m	      set-mark
	    '	      goto-mark
	    ^X^X      goto-mark
	    E	      examine
	    :e	      examine
	    ^X^V      examine
	    :n	      next-file
	    :p	      prev-file
	    t	      next-tag
	    T	      prev-tag
	    :x	      index-file
	    :d	      remove-file
	    -	      toggle-option
	    :t	      toggle-option t
	    s	      toggle-option o
	    _	      display-option
	    |	      pipe
	    v	      visual
	    !	      shell
	    +	      firstcmd
	    @	      rotate-right
	    H	      help
	    h	      help
	    V	      version
	    0	      digit
	    1	      digit
	    2	      digit
	    3	      digit
	    4	      digit
	    5	      digit
	    6	      digit
	    7	      digit
	    8	      digit
	    9	      digit
	    q	      quit
	    Q	      quit
	    :q	      quit
	    :Q	      quit
	    ZZ	      quit

       Commands  specified  by lesskey take precedence over the default commands.  A default com-
       mand key may be disabled by including it in the input  file  with  the  action  "invalid".
       Alternatively,  a key may be defined to do nothing by using the action "noaction".  "noac-
       tion" is similar to "invalid", but less will give an error beep for an "invalid"  command,
       but  not  for  a "noaction" command.  In addition, ALL default commands may be disabled by
       adding this control line to the input file:


       This will cause all default commands to be ignored.  The #stop line  should  be	the  last
       line in that section of the file.

       Be  aware  that #stop can be dangerous.	Since all default commands are disabled, you must
       provide sufficient commands before the #stop line to enable all	necessary  actions.   For
       example, failure to provide a "quit" command can lead to frustration.

       The line-editing section begins with the line:


       This section specifies new key bindings for the line editing commands, in a manner similar
       to the way key bindings for ordinary commands are specified in the #command section.   The
       line-editing  section consists of a list of keys and actions, one per line as in the exam-
       ple below.

       The following input file describes the set of default line-editing keys used by less:

	    \t	      forw-complete
	    \17       back-complete
	    \e\t      back-complete
	    ^L	      expand
	    ^V	      literal
	    ^A	      literal
	    \el       right
	    \kr       right
	    \eh       left
	    \kl       left
	    \eb       word-left
	    \e\kl     word-left
	    \ew       word-right
	    \e\kr     word-right
	    \ei       insert
	    \ex       delete
	    \kx       delete
	    \eX       word-delete
	    \ekx      word-delete
	    \e\b      word-backspace
	    \e0       home
	    \kh       home
	    \e$       end
	    \ke       end
	    \ek       up
	    \ku       up
	    \ej       down

       The environment variable section begins with the line


       Following this line is a list of environment variable assignments.  Each line consists  of
       an environment variable name, an equals sign (=) and the value to be assigned to the envi-
       ronment variable.  White space before and after the equals  sign  is  ignored.	Variables
       assigned  in  this way are visible only to less.  If a variable is specified in the system
       environment and also in a lesskey file, the value in the lesskey  file  takes  precedence.
       Although  the  lesskey  file can be used to override variables set in the environment, the
       main purpose of assigning variables in the lesskey file is simply to have all less config-
       uration information stored in one file.

       The  following input file sets the -i option whenever less is run, and specifies the char-
       acter set to be "latin1":

	    LESS = -i
	    LESSCHARSET = latin1


       It is not possible to specify special keys, such as  uparrow,  in  a  keyboard-independent
       manner.	 The only way to specify such keys is to specify the escape sequence which a par-
       ticular keyboard sends when such a keys is pressed.

       On MS-DOS and OS/2 systems, certain keys send a sequence of characters which start with	a
       NUL character (0).  This NUL character should be represented as \340 in a lesskey file.

       Copyright (C) 2000  Mark Nudelman
       Copyright (c) 1994,1995,1996,1997,1998  Kazushi (Jam) Marukawa, Japanized routines only

       lesskey	is  part  of the GNU project and 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 Soft-
       ware Foundation; either version 2, or (at your option) any later version.

       lesskey is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; with-
       out 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 lesskey; see
       the file COPYING.  If not, write to the Free Software Foundation, 59 Temple  Place,  Suite
       330, Boston, MA	02111-1307, USA.

       Mark Nudelman <markn@greenwoodsoftware.com>
       Send bug reports or comments to the above address or to bug-less@gnu.org.

				     Version 378: 30 Sep 2002			       LESSKEY(1)
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