lkml.org 
[lkml]   [2003]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Detecting changes in a directory tree
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/

\
 
 \ /
  Last update: 2005-03-22 13:32    [W:0.057 / U:2.612 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site