[Libdlo] Multiseat config problem...

[Bernie Thompson]

Hi Jonathan,

Yea, that's a very fragile part of the scripts (relying on the details of
the tree structure in /sys).  If anyone has a better suggestion, it's
welcome!

What it's looking for is the devnum of the common hub that the keyboard,
mouse, and display are all sitting off of.  With that, you'll see ls -lR
/dev/usbseat showing kbd, mouse, display clustered together.

Guessing from your output, if you back up one more directory on those two
lines (more more ../ ), I'd guess you'll have it.

Thanks,
Bernie

On Tue, Sep 15, 2009 at 8:47 AM, Jonathan D. Proulx <jon at csail.mit.edu>wrote:

> Hi Bernie,
>
> Thanks for writing up the multiseat stuff!
>
> After a couple of issue with finding missing execute bits and a script
> I forgot to copy into play I think I've narrowed the actual problem
> to:
>
> run_program: '/bin/cat
> /sys//class/input/input12/mouse2/../../../../../devnum'
> run_program: '/bin/cat' (stderr) '/bin/cat:
> /sys//class/input/input12/mouse2/../../../../../devnum: No such file or
> directory'
>
> presumably it wants to get to one of these:
>
> [jon at kvas multiseat-bits]$ find /sys/ -name devnum
> /sys/devices/pci0000:00/0000:00:1a.0/usb1/devnum
> /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/devnum
> /sys/devices/pci0000:00/0000:00:1a.1/usb2/devnum
> /sys/devices/pci0000:00/0000:00:1a.2/usb3/devnum
> /sys/devices/pci0000:00/0000:00:1a.7/usb4/devnum
> /sys/devices/pci0000:00/0000:00:1a.7/usb4/4-2/devnum
> /sys/devices/pci0000:00/0000:00:1a.7/usb4/4-2/4-2.2/devnum
> /sys/devices/pci0000:00/0000:00:1a.7/usb4/4-2/4-2.4/devnum
> /sys/devices/pci0000:00/0000:00:1d.0/usb5/devnum
> /sys/devices/pci0000:00/0000:00:1d.1/usb6/devnum
> /sys/devices/pci0000:00/0000:00:1d.2/usb7/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-3/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-4/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-4/8-4.3/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-4/8-4.3/8-4.3.1/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-4/8-4.3/8-4.3.3/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-4/8-4.4/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-5/devnum
> /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-5/8-5.2/devnum
>
> But can't figure any number of ../ paths that will get there
> /sys//class/input/input12/mouse2/device/../devnum
> does exist
>
> but is apparently the wrong thing, switching the rules to use that
> gives me:
>
> ls -R /dev/usbseat/
> /dev/usbseat/:
> 17  18  3
>
> /dev/usbseat/17:
> mouse
>
> /dev/usbseat/18:
> keyboard
>
> /dev/usbseat/3:
> display
>
> So the rules are getting triggered, but I'm not sure what devnums we
> want to pull
>
> -Jon
>
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