On 17.07.24 14:29, Florian Eckert wrote:
In my opinion, the best course of action is to just deal with it by
changing the code to no longer rely on usbX names. Better make it
depend on the sysfs path, similar to wifi-device path handling in the
wireless config.
I am already using the sysfs path, but if the usbX name changes then
also the
sysfs path changes as well! See the devices I have attached '->'. Or am
I
misunderstanding you?
Boot 1:
root@G3-10940 /sys/bus/usb/devices # ls -la | grep usb
lrwxrwxrwx 1 root root 0 Jul 17 12:56 1-0:1.0 ->
../../../devices/pci0000:00/0000:00:12.0/usb1/1-0:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:56 1-1 ->
../../../devices/pci0000:00/0000:00:12.0/usb1/1-1
lrwxrwxrwx 1 root root 0 Jul 17 12:56 1-1.2 ->
../../../devices/pci0000:00/0000:00:12.0/usb1/1-1/1-1.2
lrwxrwxrwx 1 root root 0 Jul 17 12:56 1-1.2:1.0 ->
../../../devices/pci0000:00/0000:00:12.0/usb1/1-1/1-1.2/1-1.2:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:56 1-1:1.0 ->
../../../devices/pci0000:00/0000:00:12.0/usb1/1-1/1-1:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-0:1.0 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-0:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-1 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-1
lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-1.3 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-1/2-1.3
-> lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-1.3:1.0 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-1/2-1.3/2-1.3:1.0
-> lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-1.3:1.1 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-1/2-1.3/2-1.3:1.1
-> lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-1.3:1.2 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-1/2-1.3/2-1.3:1.2
-> lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-1.3:1.3 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-1/2-1.3/2-1.3:1.3
lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-1.3:1.4 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-1/2-1.3/2-1.3:1.4
lrwxrwxrwx 1 root root 0 Jul 17 12:56 2-1:1.0 ->
../../../devices/pci0000:00/0000:00:13.0/usb2/2-1/2-1:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:56 3-0:1.0 ->
../../../devices/pci0000:00/0000:00:10.0/usb3/3-0:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:56 4-0:1.0 ->
../../../devices/pci0000:00/0000:00:10.0/usb4/4-0:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:56 usb1 ->
../../../devices/pci0000:00/0000:00:12.0/usb1
lrwxrwxrwx 1 root root 0 Jul 17 12:56 usb2 ->
../../../devices/pci0000:00/0000:00:13.0/usb2
Boot 2:
root@G3-10940 /sys/bus/usb/devices # ls -la | grep usb
lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-0:1.0 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-0:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-1 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-1
lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-1.3 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1.3
-> lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-1.3:1.0 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1.3/1-1.3:1.0
-> lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-1.3:1.1 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1.3/1-1.3:1.1
-> lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-1.3:1.2 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1.3/1-1.3:1.2
-> lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-1.3:1.3 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1.3/1-1.3:1.3
lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-1.3:1.4 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1.3/1-1.3:1.4
lrwxrwxrwx 1 root root 0 Jul 17 12:43 1-1:1.0 ->
../../../devices/pci0000:00/0000:00:13.0/usb1/1-1/1-1:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:43 2-0:1.0 ->
../../../devices/pci0000:00/0000:00:12.0/usb2/2-0:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:43 2-1 ->
../../../devices/pci0000:00/0000:00:12.0/usb2/2-1
lrwxrwxrwx 1 root root 0 Jul 17 12:43 2-1.2 ->
../../../devices/pci0000:00/0000:00:12.0/usb2/2-1/2-1.2
lrwxrwxrwx 1 root root 0 Jul 17 12:43 2-1.2:1.0 ->
../../../devices/pci0000:00/0000:00:12.0/usb2/2-1/2-1.2/2-1.2:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:43 2-1:1.0 ->
../../../devices/pci0000:00/0000:00:12.0/usb2/2-1/2-1:1.0
lrwxrwxrwx 1 root root 0 Jul 17 12:43 usb1 ->
../../../devices/pci0000:00/0000:00:13.0/usb1
lrwxrwxrwx 1 root root 0 Jul 17 12:43 usb2 ->
../../../devices/pci0000:00/0000:00:12.0/usb2
Oh, right. The main issue here is the fact that the device ids in the
path contain the bus number as initial component. I guess the syntax
could be something like: "pci0000:00/0000:00:12.0%<id>"
To resolve it, it would look up the bus number from the controller path
and then use /sys/bus/usb/devices/<bus>-<id> as the device path.
- Felix
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