Flash drive device name difficulties.

[Malcolm Kay]

On Mon, 17 Oct 2005 02:29 pm, Robert Marella wrote:
> On Sun, 16 Oct 2005 15:54:23 +0930
>
> Malcolm Kay <malcolm.kay at internode.on.net> wrote:
> > I am running FreeBSD 5.4 RELEASE.
> > I recently aquired a 256M USB flash drive
> > which the system recognises when plugged in;
> > and I can mount and use it -- all working well.
> >
> > But now I'd like to make it available to a user
> > or group of users through mtools. To do this I need
> > to change the permissions on /dev/da0s1 where the
> > flash drive msdos partition appears. This I can make happen
> > automatically using /etc/usbd.conf by adding the lines:
> >
> > device "RunDisk"
> >         vendor  0x0ef5
> >         product 0x2366
> >         attach "sleep 1; /bin/chmod g+rw /dev/da[0-9]*"
> >
> > giving members of the operator group access.
> > But this changes permissions on all "da[0-9]" devices.
> > I know the man pages suggest ${DEVICENAME} to obtain the
> > particular device but this doesn't work here because usbd
> > sees the device as "umass0" which doesn't appear in /dev/*.
> >
> > For the moment this is the only device I have appearing
> > in the "da*" group so the problem is not immediate/urgent.
> > But is there some way I can extract the specific "da*"
> > device name to use in the attach statement or is there some
> > way I can make the flash drive always pop up at a specific
> > da name.
> >
> > I've also taken a look at devd.conf but the documentation
> > here seems somewhat sparse.
> >
> > You consideration is appreciated,
> >
> > Malcolm Kay
>
> Hello Malcolm
>
> I don't know anything about mtools but you can check this link
> regarding user mounting of 'da*' devices. Also have a look at
> 'man devfs.rules' and 'man devfs.conf'

I don't actally find devfs.rules or devfs.conf in the man pages;
(perhaps these are an addition in STABLE or 6.0) however 
devfs(5) and devfs(8) and the files themselves shed some light 
on the matter. While the information seems a bit sketchy in parts 
I think it will get me somewhere near where I want to be.

Thanks for your time and assistance,
Malcolm Kay
>
> http://lists.freebsd.org/mailman/htdig/freebsd-questions/2004-
>November/064237.html
>
> Good luck
>
> Robert