Writing General Rules for USB devices.

Writing General Rules for USB devices.

[Krishna Prasad G.]

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Hi Hotplug Development,

This is regarding writing general rules for any USB devices.

I am G.Krishna Prasad. I am working on Linux 2.6.15 kernel. 

I need to identify USB devices connection and removal automatically. 

I have written following udev rules in 10-local.rules in /etc/udev/rules.d:

ACTION=="add", SUBSYSTEM=="usb_device", RUN+="/sbin/myusbmonitor 0"
ACTION=="remove", SUBSYSTEM=="usb_device", RUN+="/sbin/myusbmonitor 1"

and the script "myusbmonitor" is as follows:

#!/bin/sh
#Description: A prototype script to demonstrate insertion/removal any usb device using udev frame work of linux
#
#Note: Use this script when you have following lines to /etc/udev/rules.d/50-udev.rules
#
#  ##Added by Manjunathan Padua
# ACTION=="add", SUBSYSTEM=="usb_device", RUN+="/sbin/myusbmonitor 0"
# ACTION=="remove", SUBSYSTEM=="usb_device", RUN+="/sbin/myusbmonitor 1"
#
#

if [ $1 -eq "0" ]; then
 echo "usb was inserted into the PC " >> /tmp/usb ; #log the usb found event
else
 echo "usb was removed from the PC" >> /tmp/usb ; #log the  usb removal event
fi


Issues/Concerns:
-----------------

Only "Add" event is recognized by my script.

No "Remove" events are captured.

Please help me in this regard.

Thanks and regards,
G.Krishna Prasad.

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Re: Writing General Rules for USB devices.

[Greg KH]

On Tue, Jan 16, 2007 at 02:06:14PM +0530, Krishna Prasad G. wrote:
> 
> Hi Hotplug Development,
> 
> This is regarding writing general rules for any USB devices.
> 
> I am G.Krishna Prasad. I am working on Linux 2.6.15 kernel. 
> 
> I need to identify USB devices connection and removal automatically. 
> 
> I have written following udev rules in 10-local.rules in /etc/udev/rules.d:
> 
> ACTION="add", SUBSYSTEM="usb_device", RUN+="/sbin/myusbmonitor 0"
> ACTION="remove", SUBSYSTEM="usb_device", RUN+="/sbin/myusbmonitor 1"
> 
> and the script "myusbmonitor" is as follows:
> 
> #!/bin/sh
> #Description: A prototype script to demonstrate insertion/removal any usb device using udev frame work of linux
> #
> #Note: Use this script when you have following lines to /etc/udev/rules.d/50-udev.rules
> #
> #  ##Added by Manjunathan Padua
> # ACTION="add", SUBSYSTEM="usb_device", RUN+="/sbin/myusbmonitor 0"
> # ACTION="remove", SUBSYSTEM="usb_device", RUN+="/sbin/myusbmonitor 1"
> #
> #
> 
> if [ $1 -eq "0" ]; then
>  echo "usb was inserted into the PC " >> /tmp/usb ; #log the usb found event
> else
>  echo "usb was removed from the PC" >> /tmp/usb ; #log the  usb removal event
> fi
> 
> 
> Issues/Concerns:
> -----------------
> 
> Only "Add" event is recognized by my script.
> 
> No "Remove" events are captured.
> 
> Please help me in this regard.

Have you run 'udevmonitor' and watched the events happen?  Perhaps you
are just missing the remove event somehow.

Also, please try a newer kernel version, 2.6.15 is quite old now,
especially in the usb_device area.

good luck,

greg k-h

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