Messages in this thread | | | Date | Thu, 16 Jan 2003 22:54:22 -0500 | From | Jeroen van Disseldorp <> | Subject | Re: Detecting changes in a directory tree |
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On Thursday 16 January 2003 19:59, Adrian Bunk wrote: > with a kernel >= 2.4.19 dnotify [1] might do what you want.
Close, but is doesn't do it quite for me. I understand the problem of traversing inodes back up the tree, once they have changed, to see whether someone wants to receive an event. However I am not convinced that this is necessary. The idea I had was the following:
I would like to have a passthrough kind of filesystem (lets call is myfs for now) that can mount other parts of the filesystem and just maps everything to the original tree. For instance, I would mount /var on /mnt/var, using myfs. Everything from /mnt/var is directly mapped to /var.
The clue of this is that myfs *knows* about the notification, because it has to send notification to userspace for *every* inode. So if anything is written in /mnt/var, it can notify userspace. BTW for my app it would be acceptable that direct changes in /var don't lead to any events.
I haven't thought out the interface to userspace yet, but I think that can be worked out. Let me know if I'm making any sense here.
Regards, Jeroen mailto:jdizzl@xs4all.nl -- Be the change that you want to see in the world -- Gandhi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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