Re: [PATCH RFC] kobject_uevent: notify uevent sysfs file on changes

[Greg Kroah-Hartman]

On Thu, May 16, 2024 at 12:27:58PM +0200, Thomas Weißschuh wrote:
> The sysfs file "uevent" that exists for each device
> contains the same information that is attached to uevents emitted via
> netlink (or the usermode helper).
> This is useful for userspace which interacts with sysfs directly,
> without using (lib)udev.
> 
> However it is not possible to actually get notified when the data in
> the "uevent" file changes.

What is wrong with listening to the uevent that is happening when the
file changes?

> Enable these notifications, so that the "uevent" file can be used
> together with inotify and friends.

uevent files are meant to be listened to by the uevent itself, why not do
that?

thanks,

greg k-h