Re: New hotplug interface is not working right for me

["Eric S. Raymond" <esr@thyrsus.com>]

Kay Sievers <kay.sievers@vrfy.org>:
> Yeah, I'm all for doing this with udev rules. It is already working on
> my box. We just need to agree if and how we should do that. The plan is
> to add hotplug scripts with udev rules and execute scripts based on the
> same rule logic we use to name the device node.
> 
> Your hook into hotplug with a udev rule would look like this:
>   ACTION="add", SYSFS{vendor}="GPS", SYSFS{product}="0815", NAME="gps", HOTPLUG="/usr/bin/gps-something"

Hmm, this looks interesting.  I'm looking at the udev man page, and it looks
as though rules like this might work:

# The Prolific Technology 2303 (commonly in tandem with SiRF chips)
BUS="usb" ACTION="add" SYSFS{vendor}="067b" SYSFS{product}="2303" \
		NAME="gps%e" \
		HOTPLUG="/usr/bin/gps-probe"
# FTDI 8U232AM
BUS="usb" ACTION="add" SYSFS{vendor}="0403" SYSFS{product}="6001" \
		NAME="gps%e" \
		HOTPLUG="/usr/bin/gps-probe"
# Cypress M8/CY7C64013 (DeLorme uses these)
BUS="usb" ACTION="add" SYSFS{vendor}="1163" SYSFS{product}="0100" \
		NAME="gps%e" \
		HOTPLUG="/usr/bin/gps-probe"

1. Am I correct that when triggered, these would create a device called
   /dev/gpsN for some enumerated N?

2. What is the lifetime of that device?  Under what circumstances is it
   removed?
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>


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