DUMPKEYS(1) Linux Users Manual DUMPKEYS(1)
dumpkeys - dump keyboard translation tables
dumpkeys [ -hilfn1 -Sshape -ccharset --help --short-info --long-info
--numeric --full-table --separate-lines --shape=shape --funcs-only
--keys-only --compose-only --charset=charset ]
dumpkeys writes, to the standard output, the current contents of the
keyboard drivers translation tables, in the format specified by
Using the various options, the format of the output can be controlled
and also other information from the kernel and the programs dumpkeys(1)
and loadkeys(1) can be obtained.
Prints the programs version number and a short usage message to
the programs standard error output and exits.
Prints some characteristics of the kernels keyboard driver. The
items shown are:
Keycode range supported by the kernel:
This tells what values can be used after the keycode key
word in keymap files. See keymaps(5) for more information
and the syntax of these files.
Number of actions bindable to a key:
This tells how many different actions a single key can
output using various modifier keys. If the value is 16
for example, you can define up to 16 different actions to
a key combined with modifiers. When the value is 16, the
kernel probably knows about four modifier keys, which you
can press in different combinations with the key to
access all the bound actions.
Ranges of action codes supported by the kernel:
This item contains a list of action code ranges in hex
adecimal notation. These are the values that can be used
in the right hand side of a key definition, ie. the vvs
in a line
keycode xx = vv vv vv vv
(see keymaps(5) for more information about the format of
key definition lines). dumpkeys(1) and loadkeys(1) sup
port a symbolic notation, which is preferable to the
numeric one, as the action codes may vary from kernel to
kernel while the symbolic names usually remain the same.
However, the list of action code ranges can be used to
determine, if the kernel actually supports all the
symbols loadkeys(1) knows, or are there maybe some
actions supported by the kernel that have no symbolic
name in your loadkeys(1) program. To see this, you com
pare the range list with the action symbol list, see
option --long-info below.
Number of function keys supported by kernel:
This tells the number of action codes that can be used to
output strings of characters. These action codes are tra
ditionally bound to the various function and editing keys
of the keyboard and are defined to send standard escape
sequences. However, you can redefine these to send common
command lines, email addresses or whatever you like.
Especially if the number of this item is greater than the
number of function and editing keys in your keyboard, you
may have some "spare" action codes that you can bind to
AltGr-letter combinations, for example, to send some use
ful strings. See loadkeys(1) for more details.
You can see you current function key definitions with the
This option instructs dumpkeys to print a long information list
ing. The output is the same as with the --short-info appended
with the list of action symbols supported by loadkeys(1) and
dumpkeys(1), along with the symbols numeric values.
This option causes dumpkeys to by-pass the conversion of action
code values to symbolic notation and to print the in hexadecimal
This makes dumpkeys skip all the short-hand heuristics (see
keymaps(5)) and output the key bindings in the canonical form.
First a keymaps line describing the currently defined modifier
combinations is printed. Then for each key a row with a column
for each modifier combination is printed. For example, if the
current keymap in use uses seven modifiers, every row will have
seven action code columns. This format can be useful for example
to programs that post-process the output of dumpkeys.
This forces dumpkeys to write one line per (modifier,keycode)
pair. It prefixes the word plain for plain keycodes.
Tells dumpkeys to use the specified table shape. Allowed shapes
are 0: default shape (same as no -S); 1: same as option
--full-table; 2: same as option --separate-lines; 3: display one
line per keycode (as in shape 1),
until first hole is met, then use one line per (modifier,key
code) pair (as in shape 2).
When this option is given, dumpkeys prints only the function key
string definitions. Normally dumpkeys prints both the key bind
ings and the string definitions.
When this option is given, dumpkeys prints only the key bind
ings. Normally dumpkeys prints both the key bindings and the
When this option is given, dumpkeys prints only the compose key
combinations. This option is available only if your kernel has
compose key support.
This instructs dumpkeys to interpret character code values
according to the specified character set. This affects only the
translation of character code values to symbolic names. Valid
values for charset are listed by the --help option. If no
charset is specified, iso-8859-1 is used as a default. This
option produces an output line charset "iso-8859-X", telling
loadkeys how to interpret the keymap. (For example, "division"
is 0xf7 in iso-8859-1 but 0xba in iso-8859-8).
/usr/share/keymaps/ recommended directory for keymap files
loadkeys(1), keymaps(5), setkeycodes(8).
Console tools 09 Oct 1997 DUMPKEYS(1)