:: Re: [DNG] Is Jude Nelson OK?
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著者: Jude Nelson
日付:  
To: aitor_czr
CC: dng@lists.dyne.org
題目: Re: [DNG] Is Jude Nelson OK?
I'm alive, barely. Not only am I working on my thesis, but also I work at
a start-up based on my thesis's technology, and I've had to spend the past
few weeks preparing for a conference at which I'm presenting this week. I
haven't even had time to answer emails :(

Shraptor: I've seen your emails and Github reports--I think you've
discovered the source of the ID_INPUT bug. The udev-compat.sh script walks
the metadata stored in /dev/metadata/dev/$DEVICE, and uses it to generate
the udev labels and tags. The stat_input helper in /lib/vdev should print
out VDEV_INPUT=1 when given the path to the device file to your mouse, and
VDEV_INPUT=1 should be present in
/dev/metadata/dev/$MOUSE_DEVICE/properties. udev-compat.sh reads the
properties file and translates VDEV_INPUT=1 into E:ID_INPUT=1 in
/run/udev/data/$MOUSE_DEVICE_ID. The fact that this isn't happening
consistently suggests either a race condition, or a bug in udev-compat.sh
that causes the udev file (in /run/udev) to get overwritten somehow.

Example of what should happen with character device 13,82
(/dev/input/event18 on my laptop)

$ /lib/vdev/stat_input /dev/input/event18
VDEV_INPUT=1
VDEV_INPUT_MOUSE=1
VDEV_INPUT_CLASS=mouse
VDEV_PROPERTIES="VDEV_INPUT VDEV_INPUT_MOUSE VDEV_INPUT_CLASS "

$ stat /dev/input/event18
  File: '/dev/input/event18'
  Size: 0         Blocks: 0          IO Block: 4096   character special file
Device: fh/15d Inode: 38955       Links: 1     Device type: d,52
Access: (0660/crw-rw----)  Uid: (    0/    root)   Gid: (  149/   input)
Access: 2015-09-04 17:57:47.982595330 -0400
Modify: 2015-09-04 17:57:47.982595330 -0400
Change: 2015-09-04 17:57:48.058595332 -0400
 Birth: -


$ cat /run/udev/data/c13:82
I:64260000
E:ID_PATH=platform-i8042-serio-2
E:ID_PATH_TAG=platform-i8042-serio-2
E:ID_INPUT=1
E:ID_INPUT_MOUSE=1
E:ID_INPUT_CLASS=mouse

If the file is getting overwritten somehow, one way to get a trace of it
happening is to use inotifywatch(1) to watch /run/udev/data/ to see what
files get created, written, and unlinked when you plug your mouse in.

Apologies for disappearing for the past two weeks. Getting ready for this
next conference took a lot more time than I hoped it would :/
-Jude

On Wed, Oct 28, 2015 at 10:47 AM, aitor_czr <aitor_czr@???> wrote:

> I had a look at vdev...
>
> Impresive.
>
> I will try to debianize it.
>
> Aitor.
>
> On 26/10/15 13:00, Jaromil <jaromil@???> <jaromil@???> wrote:
>
> > On Mon, 2015-10-26 at 10:46 +0100, shraptor wrote:
>
> > > Maybe he is just swamped with work.
>
> > > He said he follows what's happening and that there are still some> hiccups to work out. He also wrote that he finds less and less time> time to work on vdev this academic year.
>
> Of course this is it. a Ph.D. can be very demanding especially in
> writing phase and especially if full-time and including a tuition
> contract.
>
> Lets allow people involved to find their own pace as Devuan is still
> based on voluntary effort and everyone involved feels enough the urge as
> well the peer pressure.
>
> The current development phase is aligning for a beta release, there is a
> lot of work going on on many levels, not only technical, but less
> urgency for vdev anyway, which won't be substituting udev right away.
> It is indeed good to have it packaged, so more people can try and
> perhaps it will attract more contributors.
>
> So in case of vdev I have no worries, as Jude is well dedicated and
> understand the huge importance of what he is doing, with your help of
> course, and also vdev is a concrete outcome of his Ph.D. thesis, so
> there is an incentive also in that context to carry it on.
>
> In any case, good that we care about each other. After all it's been one
> year now we are sitting around this camp, warming canned beans in pans
> over the fire and doing our best to re-build a new town :^) and its
> coming along.
>
> ciao
>
>
>
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