Linux Asynchronous event

Harini1111 · 08-27-2008, 02:12 PM

Hi all,

I want to get notified my user space application from kernel space whenever my USB serial device has been either added or removed (asynchronous I/O notification).

I tried Linux hotplugging via udev rules it works fine but I looking for a callback (or similar) mechanism or Can I send an events from my USB serial driver module to user space application? Or Can I use Linux signal to notify those asynchronous evens from kernel space to user space?

Thanks,
Raj

David1357 · 08-27-2008, 08:55 PM

Quote:

Originally Posted by Harini1111

I want to get notified my user space application from kernel space whenever my USB serial device has been either added or removed (asynchronous I/O notification).

I waited to answer this in case someone else had a bright idea. I think the only way to handle this is to create a separate thread that polls to see of your device has been added.

sundialsvcs · 08-30-2008, 05:02 PM

You didn't look hard enough ... see "hotplug" or "coldplug."

What you do when hotplug senses the event is up to you. If you want to invoke a program that sends a message to some socket...