Re: [PATCH] Give a hint when 'udevd' is ready to operate

[Kay Sievers <kay.sievers@vrfy.org>]

On Sat, Apr 29, 2006 at 04:11:34PM +0200, Enrico Scholz wrote:
> Kay Sievers <kay.sievers@vrfy.org> writes:
> 
> >> 	udevd --daemon
> >> 	udevtrigger
> >
> > Yeah, that is the usual way and udevd makes sure not to return before
> > it's fully initialized. Waiting for a file from a daemon, just because
> > the minit-like stuff tries to be smart (daemons don't detach) sounds
> > weird. Anyway, the current udevd exports the seqnum of the kernel, so
> > one can wait for that,
> 
> Does not work; the first call to export_initial_seqnum() (before fork())
> is a noop because
> 
> |        strlcpy(filename, udev_root, sizeof(filename));
> |        strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
> |        fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
> 
> fails due to the non-existing '/dev/.udev' path. So, my patch should be
> applied earlier

Just create that directory yourself and wait for the seqnum file to
appear. In the devel tree it's already changed 3 days ago, but not in
a released version.

Kay


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