input_scancode_to_scalar(9) [centos man page]

INPUT_SCANCODE_TO_SC(9) 					  Input Subsystem					   INPUT_SCANCODE_TO_SC(9)

NAME

       input_scancode_to_scalar - converts scancode in struct input_keymap_entry

SYNOPSIS

       int input_scancode_to_scalar(const struct input_keymap_entry * ke, unsigned int * scancode);

ARGUMENTS

       ke
	   keymap entry containing scancode to be converted.

       scancode
	   pointer to the location where converted scancode should be stored.

DESCRIPTION

       This function is used to convert scancode stored in struct keymap_entry into scalar form understood by legacy keymap handling methods.
       These methods expect scancodes to be represented as 'unsigned int'.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   INPUT_SCANCODE_TO_SC(9)

SETKEYCODES(8)							 Keyboard Support						    SETKEYCODES(8)

NAME

       setkeycodes - load kernel scancode-to-keycode mapping table entries

SYNOPSIS

       setkeycodes scancode keycode ...

DESCRIPTION

       The  setkeycodes  command  reads  its arguments two at a time, each pair of arguments consisting of a scancode (given in hexadecimal) and a
       keycode (given in decimal). For each such pair, it tells the kernel keyboard driver to map the specified scancode to the specified keycode.

       This command is useful only for people with slightly unusual keyboards, that have a few keys which produce scancodes that the  kernel  does
       not recognize.

THEORY

       The  usual  PC  keyboard  produces  a  series  of  scancodes  for  each	key press and key release. (Scancodes are shown by showkey -s, see
       showkey(1).)  The kernel parses this stream of scancodes, and converts it to a stream of keycodes (key  press/release  events).	 (Keycodes
       are  shown  by showkey.)  Apart from a few scancodes with special meaning, and apart from the sequence produced by the Pause key, and apart
       from shiftstate related scancodes, and apart from the key up/down bit, the stream of scancodes consists of unescaped scancodes xx (7  bits)
       and  escaped  scancodes	e0  xx	(8+7  bits).   To these scancodes or scancode pairs, a corresponding keycode can be assigned (in the range
       1-127).	For example, if you have a Macro key that produces e0 6f according to showkey(1), the command
	      setkeycodes e06f 112
       will assign the keycode 112 to it, and then loadkeys(1) can be used to define the function of this key.

       Some older kernels might hardwire a low scancode range to the equivalent keycodes; setkeycodes will fail when you try to remap these.

2.6 KERNELS
       In 2.6 kernels key codes lie in the range 1-255, instead of 1-127.  (It might be best to confine oneself to the range 1-239.)

       In 2.6 kernels raw mode, or scancode mode, is not very raw at all.  The code returned by showkey -s will change after use  of  setkeycodes.
       A kernel bug. See also showkey(1).

OPTIONS

       None.

BUGS

       The keycodes of X have nothing to do with those of Linux.  Unusual keys can be made visible under Linux, but not under X.

SEE ALSO

       dumpkeys (1), loadkeys (1), showkey (1), getkeycodes (8)

Local								    8 Nov 1994							    SETKEYCODES(8)