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/*
* Copyright © 2015 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include <fcntl.h>
#include <libevdev/libevdev.h>
#include <libudev.h>
#include <linux/input.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include "util-macros.h"
#include "util-prop-parsers.h"
/**
* For a non-zero fuzz on the x/y axes, print that fuzz as property and
* reset the kernel's fuzz to 0.
* https://bugs.freedesktop.org/show_bug.cgi?id=105202
*/
static void
handle_absfuzz(struct udev_device *device)
{
const char *devnode;
struct libevdev *evdev = NULL;
int fd = -1;
int rc;
unsigned int axes[] = {
ABS_X,
ABS_Y,
ABS_MT_POSITION_X,
ABS_MT_POSITION_Y,
};
devnode = udev_device_get_devnode(device);
if (!devnode)
goto out;
fd = open(devnode, O_RDONLY);
if (fd < 0)
goto out;
rc = libevdev_new_from_fd(fd, &evdev);
if (rc != 0)
goto out;
if (!libevdev_has_event_type(evdev, EV_ABS))
goto out;
ARRAY_FOR_EACH(axes, code) {
int fuzz;
fuzz = libevdev_get_abs_fuzz(evdev, *code);
if (fuzz)
printf("LIBINPUT_FUZZ_%02x=%d\n", *code, fuzz);
}
out:
close(fd);
libevdev_free(evdev);
}
/**
* Where a device has EVDEV_ABS_... set with a fuzz, that fuzz hasn't been
* applied to the kernel yet. So we need to extract it ourselves **and**
* update the property so the kernel won't actually set it later.
*/
static void
handle_evdev_abs(struct udev_device *device)
{
unsigned int axes[] = {
ABS_X,
ABS_Y,
ABS_MT_POSITION_X,
ABS_MT_POSITION_Y,
};
ARRAY_FOR_EACH(axes, code) {
const char *prop;
char name[64];
uint32_t mask;
struct input_absinfo abs;
snprintf(name, sizeof(name), "EVDEV_ABS_%02X", *code);
prop = udev_device_get_property_value(device, name);
if (!prop)
continue;
mask = parse_evdev_abs_prop(prop, &abs);
if (mask & ABS_MASK_FUZZ)
printf("LIBINPUT_FUZZ_%02x=%d\n", *code, abs.fuzz);
}
}
int
main(int argc, char **argv)
{
int rc = 1;
struct udev *udev = NULL;
struct udev_device *device = NULL;
const char *syspath;
if (argc != 2)
return 1;
syspath = argv[1];
udev = udev_new();
if (!udev)
goto out;
device = udev_device_new_from_syspath(udev, syspath);
if (!device)
goto out;
handle_absfuzz(device);
handle_evdev_abs(device);
rc = 0;
out:
if (device)
udev_device_unref(device);
if (udev)
udev_unref(udev);
return rc;
}
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