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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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libudev.h>
int main(int argc, char **argv)
{
int rc = 1;
struct udev *udev = NULL;
struct udev_device *device = NULL;
const char *syspath,
*phys = NULL;
const char *product;
char group[1024];
char *str;
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;
/* Find the first parent with ATTRS{phys} set. For tablets that
* value looks like usb-0000:00:14.0-1/input1. Drop the /input1
* bit and use the remainder as device group identifier */
while (device != NULL) {
struct udev_device *parent;
phys = udev_device_get_sysattr_value(device, "phys");
if (phys)
break;
parent = udev_device_get_parent(device);
udev_device_ref(parent);
udev_device_unref(device);
device = parent;
}
if (!phys)
goto out;
/* udev sets PRODUCT on the same device we find PHYS on, let's rely
on that*/
product = udev_device_get_property_value(device, "PRODUCT");
if (!product)
product = "";
snprintf(group, sizeof(group), "%s:%s", product, phys);
str = strstr(group, "/input");
if (str)
*str = '\0';
/* Cintiq 22HD Touch has
usb-0000:00:14.0-6.3.1/input0 for the touch
usb-0000:00:14.0-6.3.0/input0 for the pen
Check if there's a . after the last -, if so, cut off the string
there.
*/
str = strrchr(group, '.');
if (str && str > strrchr(group, '-'))
*str = '\0';
printf("%s\n", group);
rc = 0;
out:
if (device)
udev_device_unref(device);
if (udev)
udev_unref(udev);
return rc;
}
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