Re: [linux-usb] Re: USB device allocation
laredo@gnu.org
Fri, 8 Oct 1999 13:03:40 -0400 (EDT)
> > A much better interface for getting the information out to the daemon in
> > one fell swoop would be something like /proc/devices (except we would
> > want to list the minor and major mode devices). There would also need
> > to be an interface where a user-mode daemon could be informed of
> > changes; some kind of synthentic file which the daemon could select() or
> > poll(), and read() from to find new devices. Surely this is better than
> > forcing the daemon to periodically run readdir() over all of /devfs
> > looking for new devices!
>
> My original post was meant to suggest that your proposed notification
> method is not the right interface. There's a generic problem with the
> UNIX fs design that there is no way to be notified when an inode
> changes, and I think this problem could/should be fixed in a way that
Couldn't you define select() on a directory to exit when the directory
is modified? Or is this behavior already defined? I seem to remember
something in the back of my head about this working on one os or another.
-- Nathan Laredo
laredo@gnu.org
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