mirror of
https://gitlab.freedesktop.org/libinput/libinput.git
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b1fc392268
Multiple devices plugged into the same USB hub have the same PHYS path and are assigned to the same group. Prepend the content of the PRODUCT env to the phys path, this at least ensures that different devices are never grouped together. https://bugs.freedesktop.org/show_bug.cgi?id=89802 Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
80 lines
1.6 KiB
C
80 lines
1.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libudev.h>
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int main(int argc, char **argv)
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{
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int rc = 1;
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struct udev *udev = NULL;
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struct udev_device *device = NULL;
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const char *syspath,
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*phys = NULL;
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const char *product;
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char group[1024];
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char *str;
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if (argc != 2)
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return 1;
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syspath = argv[1];
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udev = udev_new();
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if (!udev)
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goto out;
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device = udev_device_new_from_syspath(udev, syspath);
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if (!device)
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goto out;
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/* Find the first parent with ATTRS{phys} set. For tablets that
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* value looks like usb-0000:00:14.0-1/input1. Drop the /input1
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* bit and use the remainder as device group identifier */
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while (device != NULL) {
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struct udev_device *parent;
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phys = udev_device_get_sysattr_value(device, "phys");
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if (phys)
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break;
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parent = udev_device_get_parent(device);
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udev_device_ref(parent);
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udev_device_unref(device);
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device = parent;
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}
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if (!phys)
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goto out;
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/* udev sets PRODUCT on the same device we find PHYS on, let's rely
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on that*/
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product = udev_device_get_property_value(device, "PRODUCT");
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if (!product)
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product = "";
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snprintf(group, sizeof(group), "%s:%s", product, phys);
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str = strstr(group, "/input");
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if (str)
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*str = '\0';
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/* Cintiq 22HD Touch has
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usb-0000:00:14.0-6.3.1/input0 for the touch
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usb-0000:00:14.0-6.3.0/input0 for the pen
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Check if there's a . after the last -, if so, cut off the string
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there.
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*/
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str = strrchr(group, '.');
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if (str && str > strrchr(group, '-'))
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*str = '\0';
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printf("%s\n", group);
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rc = 0;
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out:
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if (device)
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udev_device_unref(device);
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if (udev)
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udev_unref(udev);
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return rc;
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}
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