from xinput name tot sysfs name

To save the config either as udev rule, hal fdi file or even xorg.conf, we need the sysfs name of the device.

When the driver is evdev this is easy: it is the same as the xinput name.
TODO: is it possible to set another name using Identifier “X” in xorg.conf ?

• Using udev
  lshal is not even installed on my laptop anymore, so best focus on udev.
  Devices can be queried using ‘udevadm info’, but first you need to figure out the name of the device….
  TODO: how to figure out the udev name ?

$ /sbin/udevadm info —name=input/event4 —attribute-walk
…
looking at parent device ‘/devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1:1.0/input/input4’:
KERNELS"input4" SUBSYSTEMS“input”
DRIVERS"" ATTRS{name}“Logitech USB-PS/2 Optical Mouse”
ATTRS{phys}"usb-0000:00:1d.1-1/input0" ATTRS{uniq}""
ATTRS{modalias}==“input:b0003v046DpC00Ee0110-e0,1,2,4,k110,111,112,r0,1,8,am4,lsfw”
…

The ‘ATTRS{name}’ is what we want to use.
TODO: Now we just need to find out the udev name/device path…

• Using lshal
  lshal lists devices, and gives for example:
  …
  info.product = ‘Logitech USB-PS/2 Optical Mouse’ (string)
  info.subsystem = ‘input’ (string)
  info.udi = ‘/org/freedesktop/Hal/devices/usb_device_46d_c00e_noserial_if0_logicaldev_input’ (string)
  input.device = ‘/dev/input/event4’ (string)
  input.originating_device = ‘/org/freedesktop/Hal/devices/usb_device_46d_c00e_noserial_if0’ (string)
  input.product = ‘Logitech USB-PS/2 Optical Mouse’ (string)
  input.×11driver = ‘evdev’ (string)
  linux.device_file = ‘/dev/input/event4’ (string)
  linux.hotplugtype = 2 (0×2) (int)
  linux.subsystem = ‘input’ (string)
  …

The info.product name is the sysfs name.
TODO: is the input.product name is the xinput name, or simply a copy of the sysfs name ?