DESCRIPTION
The
wskbd driver handles common tasks for keyboards within the
wscons(4) framework. It is attached to the hardware specific keyboard drivers and provides their connection to “wsdisplay” devices and a character device interface.
The common keyboard support consists of:
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Mapping from keycodes (defined by the specific keyboard driver) to keysyms (hardware independent, defined in /usr/include/dev/wscons/wsksymdef.h).
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Handling of “compose” sequences. Characters commonly not present as separate key on keyboards can be generated after either a special “compose” key is pressed or a “dead accent” character is used.
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Certain translations, like turning an “ALT” modifier into an “ESC” prefix.
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Automatic key repetition (“typematic”).
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Parameter handling for “keyboard bells”.
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Generation of “keyboard events” for use by X servers.
The wskbd driver provides a number of ioctl functions to control key maps and other parameters. These functions are accessible though the associated “wsdisplay” device as well. A complete list is in /usr/include/dev/wscons/wsconsio.h. The wsconsctl(8) utility allows to access key maps and other variables.
The console locator in the configuration line refers to the device's use as input part of the operating system console. A device specification containing a positive value here will only match if the device is in use as system console. (The console device selection in early system startup is not influenced.) This way, the console device can be connected to a known wskbd device instance.
Ioctls
The following
ioctl(2) calls are provided by the
wskbd driver or by devices which use it. Their definitions are found in
dev/wscons/wsconsio.h.
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WSKBDIO_GTYPE
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Get the keyboard type.
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WSKBDIO_COMPLEXBELL, WSKBDIO_SETBELL, WSKBDIO_GETBELL, WSKBDIO_SETDEFAULTBELL, WSKBDIO_GETDEFAULTBELL (
struct wsmouse_repeat)
-
Get and set keyboard bell settings.
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WSKBDIO_SETKEYREPEAT, WSKBDIO_GETKEYREPEAT, WSKBDIO_SETDEFAULTKEYREPEAT, WSKBDIO_GETDEFAULTKEYREPEAT (
struct wskbd_keyrepeat_data)
-
Get and set keyboard autorepeat settings.
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WSKBDIO_SETLEDS, WSKBDIO_GETLEDS (
int)
-
Get and set keyboard LED settings.
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WSKBDIO_GETMAP, WSKBDIO_SETMAP (
struct wskbd_map_data)
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Get and set keyboard keymapping settings.
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WSKBDIO_GETENCODING, WSKBDIO_SETENCODING (
kbd_t)
-
Get and set keyboard encoding settings.
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WSKBDIO_GETKEYCLICK, WSKBDIO_SETKEYCLICK (
int)
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Get and set keyboard keyclick settings.
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WSKBDIO_SETVERSION (
int)
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Set the wscons_event protocol version. The default is 0 for binary compatibility. The latest version is always available as WSKBD_EVENT_VERSION, and is currently 1. All new code should use a call similar to the below to ensure the correct version is returned.
int ver = WSKBD_EVENT_VERSION;
if (ioctl(fd, WSKBDIO_SETVERSION, &ver) == -1)
err(EXIT_FAILURE, "cannot set version");