LESSKEY(1)LESSKEY(1)NAMEclesskey - specify key bindings for cless
SYNOPSISclesskey [-o output] [input]
clesskey-V
DESCRIPTION
Lesskey is used to specify a set of key bindings to be used by cless.
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 speci‐
fied, $HOME/.clesskey is read. The output file is a binary file which
is used by cless. If no output file is specified, $HOME/.cless is
written. If the output file already exists, clesskey will overwrite
it.
The input file 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 cless action, from the list below. The characters 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 fol‐
lowed 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 back‐
slash itself. Blank lines and lines which start with a pound sign (#)
are ignored.
An action may be followed by an "extra" string. When such a command is
entered while running cless, the action is performed, and then the
extra string is parsed, just as if it were typed in to cless. 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 -V flag causes clesskey to print its version number and immediately
exit. Other flags and arguments are ignored.
EXAMPLE
The following input file describes the set of default command keys used
by cless:
\r forw-line
\n 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
\40 forw-screen
f forw-screen
^F forw-screen
^V forw-screen
b back-screen
^B back-screen
\ev back-screen
z forw-window
w back-window
F forw-forever
R repaint-flush
r repaint
^R repaint
^L repaint
g goto-line
< goto-line
\e< goto-line
p percent
% percent
{ 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
= 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
\u 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
PRECEDENCE
Commands specified by clesskey take precedence over the default com‐
mands. 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 cless 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:
#stop
This will cause all default commands to be ignored. The #stop line
should be the last line in that section of the file. (Another section,
introduced by #line-edit, may follow the #stop line.)
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.
LINE EDITING
New key bindings may be specified for the line editing commands, in a
manner similar to the way key bindings for ordinary commands are speci‐
fied. This control line marks the beginning of a section of line-edit‐
ing commands:
#line-edit
Following this line is a list of keys and actions, one per line as in
the example below.
EXAMPLE
The following input file describes the set of default line-editing keys
used by cless:
#line-edit
\t forw-complete
\17 back-complete
\e\t back-complete
\14 expand
^V literal
^A literal
\el right
\eh left
\eb word-left
\ew word-right
\ei insert
\ex delete
\e\b word-backspace
\e0 home
\e$ end
\ek up
\ej down
SEE ALSOcless(1)less(1)COPYRIGHT
Copyright (c) 1984,1985,1989,1994,1995 Mark Nudelman
LESSKEY(1)
