Flash drive device name difficulties.

Robert Marella rmarella at gmail.com
Sun Oct 16 21:59:29 PDT 2005

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'


Good luck


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