[PATCH xorg-gtest 16/16] Add Device::GetDeviceNode() to return device node path from an evemu device

Peter Hutterer peter.hutterer at who-t.net
Thu Jul 5 16:41:09 PDT 2012

On Thu, Jul 05, 2012 at 02:19:33PM -0700, Chase Douglas wrote:
> On 07/03/2012 11:03 PM, Peter Hutterer wrote:
> >On Tue, Jul 03, 2012 at 11:40:25AM -0700, Chase Douglas wrote:
> >>On 07/02/2012 11:44 PM, Peter Hutterer wrote:
> >>>evemu doesn't export this information and even evemu-device just trawls
> >>>through the file system to print this info. So do the same here, noting the
> >>>time before evemu_create() and the ctime of the new device file. If the
> >>>latter is later than the former and the device names match, we can assume
> >>>this is our device.
> >>
> >>I just want to point out that it's a deficiency in uinput, not in
> >>evemu, in case anyone had any thoughts of trying to fix evemu
> >>instead.
> >
> >I did try. This could easily be part of evemu, running this exact same code
> >right after the UI_DEV_CREATE call. Unfortunately evemu_create() takes a
> >const struct so we can't save it easily without breaking ABI.
> Well, evemu could try to guess, just as this code does. What I meant
> was more that uinput is deficient in that there's no way to be 100%
> sure. That's the main reason why we didn't bother putting code like
> this into evemu directly.

the one advantage evemu has though is that it's in the best position
to guess given that it just created the device and has easy access to all
other information. plus, it wouldn't require duplicating the code across
other projects.


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