R

I just documented the protocol that udev uses to broadcast messages to clients: https://arcanenibble.github.io/hardware-hotplug-events-on-linux-the-gory-details.html

Comes with bonus free sample code <strike>on the included CD-ROM</strike>!

This is how programs on Linux listen for events such as "you plugged in a USB device" in order to.... do something useful with that information (such as opening the files on it). Normally, this "just works", but the low-level details of _how_ it works doesn't seem to be that well known.

boosts ok!

Hardware hotplug events on Linux, the gory details

Maybe the code shouldn't be the only documentation?

ArcaneNibble's site
Mar 1 at 3:27amWeb
Show threadKhleedrilMar 1

@r That's a great write-up.

I always laugh at the thought of netlink. I stumbled across it when I was trying to get notice when the machine woke from suspension (the power module does this). It is one of those examples where somebody has the brainwave to re-use some functionality which is already there, and then the idea gets taken up by half a dozen random modules and used in half a dozen random ways.