531ff40301
Some input drivers need to implement an internal hotplugging scheme for dependent devices to provide multiple X devices off one kernel device file. Such dependent devices can be added with NewInputDeviceRequest() but they are not removed when the config backend calls DeleteInputDeviceRequest(), leaving the original device to clean up. Example of the wacom driver: config/udev calls NewInputDeviceRequest("stylus") wacom PreInit calls NewInputDeviceRequest("eraser") NewInputDeviceRequest("pad") NewInputDeviceRequest("cursor") PreInit finishes. When the device is removed, the config backend only calls DeleteInputDeviceRequest for "stylus". The driver needs to call DeleteInputDeviceRequest for the dependent devices eraser, pad and cursor to clean up properly. However, when the server terminates, DeleteInputDeviceRequest is called for all devices - the driver must not remove the dependent devices to avoid double-frees. There is no method for the driver to detect why a device is being removed, leading to elaborate guesswork and some amount of wishful thinking. Though the input driver's UnInit already supports flags, they are unused. This patch uses the flags to supply information where the DeleteInputDeviceRequest request originates from, allowing a driver to selectively call DeleteInputDeviceRequest when necessary. Also bumps XINPUT ABI. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Dan Nicholson <dbn.lists@gmail.com> Signed-off-by: Keith Packard <keithp@keithp.com>
540 lines
13 KiB
C
540 lines
13 KiB
C
/*
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* Copyright © 2004 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include <kdrive-config.h>
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#endif
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#include <errno.h>
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#include <linux/input.h>
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#include <X11/X.h>
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#include <X11/Xproto.h>
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#include <X11/Xpoll.h>
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#include "inputstr.h"
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#include "scrnintstr.h"
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#include "kdrive.h"
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#define NUM_EVENTS 128
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#define ABS_UNSET -65535
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#define BITS_PER_LONG (sizeof(long) * 8)
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#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
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#define ISBITSET(x,y) ((x)[LONG(y)] & BIT(y))
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#define OFF(x) ((x)%BITS_PER_LONG)
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#define LONG(x) ((x)/BITS_PER_LONG)
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#define BIT(x) (1 << OFF(x))
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typedef struct _kevdev {
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/* current device state */
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int rel[REL_MAX + 1];
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int abs[ABS_MAX + 1];
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int prevabs[ABS_MAX + 1];
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long key[NBITS(KEY_MAX + 1)];
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/* supported device info */
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long relbits[NBITS(REL_MAX + 1)];
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long absbits[NBITS(ABS_MAX + 1)];
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long keybits[NBITS(KEY_MAX + 1)];
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struct input_absinfo absinfo[ABS_MAX + 1];
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int max_rel;
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int max_abs;
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int fd;
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} Kevdev;
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static void
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EvdevPtrBtn (KdPointerInfo *pi, struct input_event *ev)
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{
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int flags = KD_MOUSE_DELTA | pi->buttonState;
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if (ev->code >= BTN_MOUSE && ev->code < BTN_JOYSTICK) {
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switch (ev->code) {
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case BTN_LEFT:
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if (ev->value == 1)
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flags |= KD_BUTTON_1;
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else
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flags &= ~KD_BUTTON_1;
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break;
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case BTN_MIDDLE:
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if (ev->value == 1)
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flags |= KD_BUTTON_2;
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else
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flags &= ~KD_BUTTON_2;
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break;
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case BTN_RIGHT:
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if (ev->value == 1)
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flags |= KD_BUTTON_3;
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else
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flags &= ~KD_BUTTON_3;
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break;
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default:
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/* Unknow button */
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break;
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}
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KdEnqueuePointerEvent (pi, flags, 0, 0, 0);
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}
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}
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static void
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EvdevPtrMotion (KdPointerInfo *pi, struct input_event *ev)
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{
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Kevdev *ke = pi->driverPrivate;
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int i;
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int flags = KD_MOUSE_DELTA | pi->buttonState;
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for (i = 0; i <= ke->max_rel; i++)
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if (ke->rel[i])
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{
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int a;
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for (a = 0; a <= ke->max_rel; a++)
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{
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if (ISBITSET (ke->relbits, a))
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{
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if (a == 0)
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KdEnqueuePointerEvent(pi, flags, ke->rel[a], 0, 0);
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else if (a == 1)
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KdEnqueuePointerEvent(pi, flags, 0, ke->rel[a], 0);
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}
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ke->rel[a] = 0;
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}
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break;
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}
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for (i = 0; i < ke->max_abs; i++)
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if (ke->abs[i] != ke->prevabs[i])
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{
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int a;
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ErrorF ("abs");
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for (a = 0; a <= ke->max_abs; a++)
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{
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if (ISBITSET (ke->absbits, a))
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ErrorF (" %d=%d", a, ke->abs[a]);
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ke->prevabs[a] = ke->abs[a];
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}
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ErrorF ("\n");
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break;
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}
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if (ev->code == REL_WHEEL) {
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for (i = 0; i < abs (ev->value); i++)
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{
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if (ev->value > 0)
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flags |= KD_BUTTON_4;
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else
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flags |= KD_BUTTON_5;
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KdEnqueuePointerEvent (pi, flags, 0, 0, 0);
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if (ev->value > 0)
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flags &= ~KD_BUTTON_4;
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else
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flags &= ~KD_BUTTON_5;
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KdEnqueuePointerEvent (pi, flags, 0, 0, 0);
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}
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}
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}
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static void
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EvdevPtrRead (int evdevPort, void *closure)
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{
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KdPointerInfo *pi = closure;
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Kevdev *ke = pi->driverPrivate;
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int i;
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struct input_event events[NUM_EVENTS];
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int n;
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n = read (evdevPort, &events, NUM_EVENTS * sizeof (struct input_event));
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if (n <= 0) {
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if (errno == ENODEV)
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DeleteInputDeviceRequest(pi->dixdev, 0);
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return;
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}
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n /= sizeof (struct input_event);
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for (i = 0; i < n; i++)
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{
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switch (events[i].type) {
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case EV_SYN:
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break;
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case EV_KEY:
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EvdevPtrBtn (pi, &events[i]);
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break;
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case EV_REL:
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ke->rel[events[i].code] += events[i].value;
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EvdevPtrMotion (pi, &events[i]);
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break;
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case EV_ABS:
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ke->abs[events[i].code] = events[i].value;
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EvdevPtrMotion (pi, &events[i]);
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break;
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}
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}
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}
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char *kdefaultEvdev[] = {
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"/dev/input/event0",
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"/dev/input/event1",
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"/dev/input/event2",
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"/dev/input/event3",
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};
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#define NUM_DEFAULT_EVDEV (sizeof (kdefaultEvdev) / sizeof (kdefaultEvdev[0]))
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static Status
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EvdevPtrInit (KdPointerInfo *pi)
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{
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int i;
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int fd;
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if (!pi->path) {
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for (i = 0; i < NUM_DEFAULT_EVDEV; i++) {
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fd = open (kdefaultEvdev[i], 2);
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if (fd >= 0) {
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pi->path = strdup (kdefaultEvdev[i]);
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break;
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}
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}
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}
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else {
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fd = open (pi->path, O_RDWR);
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if (fd < 0) {
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ErrorF("Failed to open evdev device %s\n", pi->path);
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return BadMatch;
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}
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}
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close(fd);
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pi->name = strdup("Evdev mouse");
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return Success;
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}
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static Status
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EvdevPtrEnable (KdPointerInfo *pi)
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{
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int fd;
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unsigned long ev[NBITS(EV_MAX)];
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Kevdev *ke;
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if (!pi || !pi->path)
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return BadImplementation;
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fd = open(pi->path, 2);
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if (fd < 0)
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return BadMatch;
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if (ioctl (fd, EVIOCGRAB, 1) < 0)
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perror ("Grabbing evdev mouse device failed");
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if (ioctl (fd, EVIOCGBIT(0 /*EV*/, sizeof (ev)), ev) < 0)
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{
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perror ("EVIOCGBIT 0");
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close (fd);
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return BadMatch;
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}
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ke = calloc(1, sizeof (Kevdev));
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if (!ke)
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{
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close (fd);
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return BadAlloc;
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}
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if (ISBITSET (ev, EV_KEY))
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{
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if (ioctl (fd, EVIOCGBIT (EV_KEY, sizeof (ke->keybits)),
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ke->keybits) < 0)
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{
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perror ("EVIOCGBIT EV_KEY");
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free(ke);
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close (fd);
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return BadMatch;
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}
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}
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if (ISBITSET (ev, EV_REL))
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{
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if (ioctl (fd, EVIOCGBIT (EV_REL, sizeof (ke->relbits)),
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ke->relbits) < 0)
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{
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perror ("EVIOCGBIT EV_REL");
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free(ke);
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close (fd);
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return BadMatch;
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}
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for (ke->max_rel = REL_MAX; ke->max_rel >= 0; ke->max_rel--)
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if (ISBITSET(ke->relbits, ke->max_rel))
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break;
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}
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if (ISBITSET (ev, EV_ABS))
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{
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int i;
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if (ioctl (fd, EVIOCGBIT (EV_ABS, sizeof (ke->absbits)),
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ke->absbits) < 0)
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{
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perror ("EVIOCGBIT EV_ABS");
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free(ke);
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close (fd);
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return BadMatch;
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}
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for (ke->max_abs = ABS_MAX; ke->max_abs >= 0; ke->max_abs--)
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if (ISBITSET(ke->absbits, ke->max_abs))
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break;
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for (i = 0; i <= ke->max_abs; i++)
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{
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if (ISBITSET (ke->absbits, i))
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if (ioctl (fd, EVIOCGABS(i), &ke->absinfo[i]) < 0)
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{
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perror ("EVIOCGABS");
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break;
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}
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ke->prevabs[i] = ABS_UNSET;
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}
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if (i <= ke->max_abs)
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{
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free(ke);
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close (fd);
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return BadValue;
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}
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}
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if (!KdRegisterFd (fd, EvdevPtrRead, pi)) {
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free(ke);
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close (fd);
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return BadAlloc;
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}
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pi->driverPrivate = ke;
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ke->fd = fd;
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return Success;
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}
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static void
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EvdevPtrDisable (KdPointerInfo *pi)
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{
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Kevdev *ke;
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ke = pi->driverPrivate;
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if (!pi || !pi->driverPrivate)
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return;
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KdUnregisterFd (pi, ke->fd, TRUE);
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if (ioctl (ke->fd, EVIOCGRAB, 0) < 0)
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perror ("Ungrabbing evdev mouse device failed");
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free(ke);
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pi->driverPrivate = 0;
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}
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static void
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EvdevPtrFini (KdPointerInfo *pi)
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{
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}
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/*
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* Evdev keyboard functions
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*/
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static void
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readMapping (KdKeyboardInfo *ki)
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{
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if (!ki)
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return;
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ki->minScanCode = 0;
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ki->maxScanCode = 247;
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}
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static void
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EvdevKbdRead (int evdevPort, void *closure)
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{
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KdKeyboardInfo *ki = closure;
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struct input_event events[NUM_EVENTS];
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int i, n;
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n = read (evdevPort, &events, NUM_EVENTS * sizeof (struct input_event));
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if (n <= 0) {
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if (errno == ENODEV)
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DeleteInputDeviceRequest(ki->dixdev, 0);
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return;
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}
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n /= sizeof (struct input_event);
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for (i = 0; i < n; i++)
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{
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if (events[i].type == EV_KEY)
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KdEnqueueKeyboardEvent (ki, events[i].code, !events[i].value);
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/* FIXME: must implement other types of events
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else
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ErrorF("Event type (%d) not delivered\n", events[i].type);
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*/
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}
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}
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static Status
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EvdevKbdInit (KdKeyboardInfo *ki)
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{
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int fd;
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if (!ki->path) {
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ErrorF("Couldn't find evdev device path\n");
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return BadValue;
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}
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else {
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fd = open (ki->path, O_RDWR);
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if (fd < 0) {
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ErrorF("Failed to open evdev device %s\n", ki->path);
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return BadMatch;
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}
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}
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close (fd);
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ki->name = strdup("Evdev keyboard");
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readMapping(ki);
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return Success;
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}
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static Status
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EvdevKbdEnable (KdKeyboardInfo *ki)
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{
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unsigned long ev[NBITS(EV_MAX)];
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Kevdev *ke;
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int fd;
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if (!ki || !ki->path)
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return BadImplementation;
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fd = open(ki->path, O_RDWR);
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if (fd < 0)
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return BadMatch;
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if (ioctl (fd, EVIOCGRAB, 1) < 0)
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perror ("Grabbing evdev keyboard device failed");
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if (ioctl (fd, EVIOCGBIT(0 /*EV*/, sizeof (ev)), ev) < 0) {
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perror ("EVIOCGBIT 0");
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close (fd);
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return BadMatch;
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}
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ke = calloc(1, sizeof (Kevdev));
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if (!ke) {
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close (fd);
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return BadAlloc;
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}
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if (!KdRegisterFd (fd, EvdevKbdRead, ki)) {
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free(ke);
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close (fd);
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return BadAlloc;
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}
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ki->driverPrivate = ke;
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ke->fd = fd;
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return Success;
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}
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static void
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EvdevKbdLeds (KdKeyboardInfo *ki, int leds)
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{
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/* struct input_event event;
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Kevdev *ke;
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ki->driverPrivate = ke;
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memset(&event, 0, sizeof(event));
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event.type = EV_LED;
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event.code = LED_CAPSL;
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event.value = leds & (1 << 0) ? 1 : 0;
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write(ke->fd, (char *) &event, sizeof(event));
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event.type = EV_LED;
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event.code = LED_NUML;
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event.value = leds & (1 << 1) ? 1 : 0;
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write(ke->fd, (char *) &event, sizeof(event));
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event.type = EV_LED;
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event.code = LED_SCROLLL;
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event.value = leds & (1 << 2) ? 1 : 0;
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write(ke->fd, (char *) &event, sizeof(event));
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event.type = EV_LED;
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event.code = LED_COMPOSE;
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event.value = leds & (1 << 3) ? 1 : 0;
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write(ke->fd, (char *) &event, sizeof(event));
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*/
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}
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static void
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EvdevKbdBell (KdKeyboardInfo *ki, int volume, int frequency, int duration)
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{
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}
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static void
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EvdevKbdDisable (KdKeyboardInfo *ki)
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{
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Kevdev *ke;
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ke = ki->driverPrivate;
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if (!ki || !ki->driverPrivate)
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return;
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KdUnregisterFd (ki, ke->fd, TRUE);
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if (ioctl (ke->fd, EVIOCGRAB, 0) < 0)
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perror ("Ungrabbing evdev keyboard device failed");
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free(ke);
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ki->driverPrivate = 0;
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}
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static void
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EvdevKbdFini (KdKeyboardInfo *ki)
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{
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}
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KdPointerDriver LinuxEvdevMouseDriver = {
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"evdev",
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EvdevPtrInit,
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EvdevPtrEnable,
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EvdevPtrDisable,
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EvdevPtrFini,
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NULL,
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};
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KdKeyboardDriver LinuxEvdevKeyboardDriver = {
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"evdev",
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EvdevKbdInit,
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EvdevKbdEnable,
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EvdevKbdLeds,
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EvdevKbdBell,
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EvdevKbdDisable,
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EvdevKbdFini,
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NULL,
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};
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