Unable to run a user program on usb device connection

[<shankoo77@yahoo.com>]

Hi,
    I'm a newbie to Linux hotplug sub-system. I want
to hook a user space application with the hot plug
sub-system in such a way that the application is
executed on attaching a specific USB device. I've
explained what all I tried, please let me know where
I'm going wrong.

My linux kernel version is 2.6.10 and it uses the
“udev” mechanism to support hot plug.  Our application
should be executed when a device with a specific
vendor id and product id is plugged in the USB bus.
I’ve enabled the hot plug support in the kernel; in
fact by default CONFIG_HOTPLUG was enabled. I included
a test.rules file in the /etc/udev/rules.d/ directory
in which I have included the above mentioned vendor
id, product id and in the PROGRAM parameter the name
of the application to be run. To start with, this
program is just a shell script that prints “Hello
World” on the console. After this, when we plug in the
above mentioned device I’m sure that the kernel has
detected it because I’m seeing the device’s
information in /proc/bus/usb/devices. But our shell
script is not getting called at all. Can some one let
me know what I'm missing here? The test.rules file
contains the following line only

ATTR{idVendor}="0451", ATTR{idProduct}="97fb",
SYMLINK+="hello-%k", MODE="666",
PROGRAM="/home/shankar/usb_disp.sh"

Thanks in Advance,
Shankar










       
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