From: Greg KH <greg@kroah.com>
To: linux-hotplug@vger.kernel.org
Subject: Re: implementing hotplug event
Date: Tue, 30 Dec 2003 22:43:37 +0000 [thread overview]
Message-ID: <20031230224337.GF2367@kroah.com> (raw)
In-Reply-To: <marc-linux-hotplug-107267522216416@msgid-missing>
On Mon, Dec 29, 2003 at 05:48:51PM -0800, Jon Smirl wrote:
> --- Greg KH <greg@kroah.com> wrote:
> > > Now my userspace app needs to open the newly loaded device driver, how
> > > do I reliably find it? I know that it is at /dev/dri/cardX but what if
> > > the user is replacing /dev with /udev or /devfs? I know the
> > > major/minor I could just mknode in my program too.
> >
> > To be safe, you can always just read the sysfs "dev" file, and do a
> > mknod with that information. Otherwise you could query udev as to what
> > it has named your device, but we don't have those hooks in udev just
> > yet... someday soon...
>
> I just sent the major/minor to the hotplug event in the environment variables,
> it seemed easier than sending out the slot id and finding "dev" in sysfs. Doing
> mknod from the user space app seems to be the most reliable scheme.
True, as long as your userapp is running as root :)
thanks,
greg k-h
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prev parent reply other threads:[~2003-12-30 22:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-29 5:19 implementing hotplug event Jon Smirl
2003-12-30 0:39 ` Greg KH
2003-12-30 1:48 ` Jon Smirl
2003-12-30 22:43 ` Greg KH [this message]
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