302 lines
8.0 KiB
Groff
302 lines
8.0 KiB
Groff
.\" $NetBSD: lesskey.1,v 1.3 1999/04/06 05:57:36 mrg Exp $
|
|
.\"
|
|
.TH LESSKEY 1 "Version 335: 03 Apr 1999"
|
|
.SH NAME
|
|
lesskey \- specify key bindings for less
|
|
.SH SYNOPSIS
|
|
.B "lesskey [-o output] [input]"
|
|
.br
|
|
.B "lesskey -V"
|
|
.SH DESCRIPTION
|
|
.I Lesskey
|
|
is used to specify a set of key bindings to be used by
|
|
.I 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
|
|
.I 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,
|
|
.I lesskey
|
|
will overwrite it.
|
|
.PP
|
|
The -V option causes
|
|
.I lesskey
|
|
to print its version number and immediately exit.
|
|
If -V is present, other options and arguments are ignored.
|
|
.PP
|
|
The input file consists of one or more
|
|
.I sections.
|
|
Each section starts with a line that identifies the type of section.
|
|
Possible sections are:
|
|
.IP #command
|
|
Defines new command keys.
|
|
.IP #line-edit
|
|
Defines new line-editing keys.
|
|
.IP #env
|
|
Defines environment variables.
|
|
.PP
|
|
Blank lines and lines which start with a pound sign (#) are ignored,
|
|
except for the special section header lines.
|
|
|
|
.SH "COMMAND SECTION"
|
|
The command section begins with the line
|
|
.sp
|
|
#command
|
|
.sp
|
|
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:
|
|
.sp
|
|
\fIstring\fP <whitespace> \fIaction\fP [extra-string] <newline>
|
|
.sp
|
|
Whitespace is any sequence of one or more spaces and/or tabs.
|
|
The \fIstring\fP is the command key(s) which invoke the action.
|
|
The \fIstring\fP may be a single command key, or a sequence of up to 15 keys.
|
|
The \fIaction\fP is the name of the less action, from the list below.
|
|
The characters in the \fIstring\fP 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 b, e, n, r or t specifies
|
|
BACKSPACE, ESCAPE, NEWLINE, RETURN or TAB, respectively.
|
|
A backslash followed by any other character indicates that character is
|
|
to be taken literally.
|
|
Characters which must be preceded by backslash include
|
|
caret, space, tab and the backslash itself.
|
|
.PP
|
|
An action may be followed by an "extra" string.
|
|
When such a command is entered while running
|
|
.I less,
|
|
the action is performed, and then the extra
|
|
string is parsed, just as if it were typed in to
|
|
.I less.
|
|
This feature can be used in certain cases to extend
|
|
the functionality 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
|
|
.I less
|
|
quits, first character of the extra string is used as its exit status.
|
|
|
|
.SH EXAMPLE
|
|
The following input file describes the set of
|
|
default command keys used by less:
|
|
.sp
|
|
.nf
|
|
#command
|
|
\er forw-line
|
|
\en forw-line
|
|
e forw-line
|
|
j 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
|
|
\e40 forw-screen
|
|
f forw-screen
|
|
^F forw-screen
|
|
^V forw-screen
|
|
b back-screen
|
|
^B back-screen
|
|
\eev back-screen
|
|
\ee\e40 forw-screen-force
|
|
z forw-window
|
|
w back-window
|
|
F forw-forever
|
|
\ee[ left-scroll
|
|
\ee] right-scroll
|
|
R repaint-flush
|
|
r repaint
|
|
^R repaint
|
|
^L repaint
|
|
g goto-line
|
|
< goto-line
|
|
\ee< goto-line
|
|
p percent
|
|
% percent
|
|
{ forw-bracket {}
|
|
} back-bracket {}
|
|
( forw-bracket ()
|
|
) back-bracket ()
|
|
[ forw-bracket []
|
|
] back-bracket []
|
|
\ee^F forw-bracket
|
|
\ee^B back-bracket
|
|
G goto-end
|
|
\ee> goto-end
|
|
> goto-end
|
|
= status
|
|
^G status
|
|
:f status
|
|
/ forw-search
|
|
? back-search
|
|
\ee/ forw-search *
|
|
\ee? back-search *
|
|
n repeat-search
|
|
\een repeat-search-all
|
|
N reverse-search
|
|
\eeN reverse-search-all
|
|
\eeu undo-hilite
|
|
m set-mark
|
|
' goto-mark
|
|
^X^X goto-mark
|
|
E examine
|
|
:e examine
|
|
^X^V examine
|
|
:n next-file
|
|
:p prev-file
|
|
:x index-file
|
|
- toggle-option
|
|
:t toggle-option t
|
|
s toggle-option o
|
|
_ display-option
|
|
| pipe
|
|
v visual
|
|
! shell
|
|
+ firstcmd
|
|
H help
|
|
h help
|
|
V version
|
|
q quit
|
|
:q quit
|
|
:Q quit
|
|
ZZ quit
|
|
.fi
|
|
.sp
|
|
.SH PRECEDENCE
|
|
Commands specified by
|
|
.I lesskey
|
|
take precedence over the default commands.
|
|
A default command 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".
|
|
"noaction" is similar to "invalid", but
|
|
.I 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:
|
|
.sp
|
|
#stop
|
|
.sp
|
|
This will cause all default commands to be ignored.
|
|
The #stop line should be the last line in that section of the file.
|
|
.PP
|
|
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.
|
|
|
|
.SH "LINE EDITING SECTION"
|
|
The line-editing section begins with the line:
|
|
.sp
|
|
#line-edit
|
|
.sp
|
|
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 example below.
|
|
|
|
.SH EXAMPLE
|
|
The following input file describes the set of
|
|
default line-editing keys used by less:
|
|
.sp
|
|
.nf
|
|
#line-edit
|
|
\et forw-complete
|
|
\e17 back-complete
|
|
\ee\et back-complete
|
|
\e14 expand
|
|
^V literal
|
|
^A literal
|
|
\eel right
|
|
\eeh left
|
|
\eeb word-left
|
|
\eew word-right
|
|
\eei insert
|
|
\eex delete
|
|
\ee\eb word-backspace
|
|
\ee0 home
|
|
\ee$ end
|
|
\eek up
|
|
\eej down
|
|
.fi
|
|
.sp
|
|
|
|
.SH "LESS ENVIRONMENT VARIABLES"
|
|
The environment variable section begins with the line
|
|
.sp
|
|
#env
|
|
.sp
|
|
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 environment variable.
|
|
White space before and after the equals sign is ignored.
|
|
Variables assigned in this way are visible only to
|
|
.I 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
|
|
.I less
|
|
configuration information stored in one file.
|
|
|
|
.SH EXAMPLE
|
|
The following input file sets the -i option whenever
|
|
.I less
|
|
is run, and specifies the character set to be "latin1":
|
|
.sp
|
|
.nf
|
|
#env
|
|
LESS = -i
|
|
LESSCHARSET = latin1
|
|
.fi
|
|
.sp
|
|
|
|
.SH "SEE ALSO"
|
|
less(1)
|
|
|
|
.SH WARNINGS
|
|
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 particular keyboard sends when such a keys is pressed.
|
|
.PP
|
|
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 \e340 in a lesskey file.
|
|
|
|
.SH COPYRIGHT
|
|
Copyright (c) 1984,1985,1989,1994,1995,1996,1999 Mark Nudelman
|
|
.br
|
|
Comments to: marknu@flash.net
|