Re: Bluetooth wireless activity triggers udev rule

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On Wed, Aug 13, 2008 at 06:04, Aras Vaichas <arasv@xxxxxxxxxxxxxx> wrote:
> Hi, I'm currently integrating runit and udev. I have a udev rule which
> runs my Blue-Z startup scripts when I plug in the USB BT dongle:
>
> ACTION=="add", ENV{SUBSYSTEM}=="bluetooth", RUN+="/usr/bin/sv up bluetooth"
>
> This works really well, cold plugging, etc. No problems.
>
> I've found an interesting quirk though. Here is the sequence of events:
>
> Computer A: I start up my system with the BT dongle inserted, the Blue-Z
> scripts are started via udev coldplugging script
> Computer B: I set up a task which searches for BT devices and tries to
> form a PPP connection
> Computer B: Detects the BT dongle on Computer A, records the address and
> forms a PPP connection
> Computer A: I disable the Blue-Z scripts # sv down bluetooth
> Computer B: Attempts to connect to A again, and sends a BT signal to
> connect ...
> Computer A: The BT dongle sends a wireless wakeup (wake-on-lan?) signal
> which causes udev to run the Blue-Z utils startup script again ...
>
> I looked at the udev events to see what was happening when Computer B
> tried to connect to Computer A. It appears that the two series of events
> are nearly identical.  Can someone suggest a way for me to start the
> Blue-Z utils *only* when the USB dongle is *inserted* (or first detected).

Match only on the the hci* creation events?
ACTION=="add", KERNEL=="hci[0-9]*", SUBSYSTEM=="bluetooth",
RUN+="/usr/bin/sv up bluetooth"

Kay
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