FreeBSD and USBmemorystick

[Roland Smith]

On Tue, Nov 11, 2008 at 09:44:14PM -0200, Gonzalo Nemmi wrote:
> On Tuesday 11 November 2008 9:17:36 pm Roland Smith wrote:
> > On Tue, Nov 11, 2008 at 09:04:13PM -0200, Gonzalo Nemmi wrote:
> > > On Tuesday 11 November 2008 5:39:02 pm Pieter Donche wrote:
> > > > On Tue, 11 Nov 2008, Jeremy Chadwick wrote:
> > > > > On Tue, Nov 11, 2008 at 08:25:51PM +0100, Pieter Donche wrote:
> > > > >> If I insert a USB memory stick in my laptop with FreeBSD 7.0 nothing
> > > > >> happens. On the same laptop in the SuSE 10.1 partition, the same USB
> > > > >> stick appears in Konqueror under Storage Media  and is ready to use)
> > > > >> In FreeBSD, Konqueror shows nothing under Storage Media.
> > > > >> Is this normal?
> > > > >
> > > > > What shows up in your kernel message log (outside of X, usually on
> > > > > the first virtual console) when you insert the stick?  It should show
> > > > > a umass device being added, then a daX device being added.
> > > >
> > > > There are indeed messages:
> > > > umass0: <M-SysT5 Dell Memory Key, class ... > on uhub4
> > > > da0: at umass-sim0 ...
> > > > ..
> > > > da0: 60 Mb   (OK, it is a 64 Mb key)
> > > > GEOM_LABEL: Label for provider da0s1 is msdosfs/USB MEMORY
> >
> > It's better to use this device, since it won't change when you plug in
> > an extra USB stick/drive.
> >
> > > > also when unplugging, some messages
> > > >
> > > > $ ls -la /dev/da0s1
> > > > shows only the character device line
> > >
> > > OK then .. let's get it to work.
> > >
> > > 1) Open /etc/devfs.rules and add the following lines:
> > > [system=10]
> > > add path 'da*' mode 0666
> >
> > add path 'msdosfs/*' mode 0666
> >
> > I prefer 'mode 0660 group usb' in principle, but that is personal.
> 
> Sure thing. But it adds an extra layer of complexity (I mean, he would have to 
> be a member of the "usb" group or even create it if it doesn't exist) and I 
> just wanted to be raw simple and to the core.
> 
> Now thanks to you reply, Pieter has more info on how to get around this :)
> 
> > > (Edit that line to suit your needs)
> > >
> > > 2) Open /etc/rc.conf and add the following line
> > > devfs_system_ruleset="system"
> > >
> > > (Edit that line to suit your needs)
> > >
> > > 3) Create a mountpoint for your pendrive
> > > mkdir -p ~/mnt/pen
> > >
> > > (Edit that line to suit your needs)
> > >
> > > 4) Open /etc/fstab and add a line like this one
> > >
> > > /dev/da0s1      /home/your_user_name/mnt/pen msdosfs rw,noauto   0   0
> >
> > /dev/msdosfs/USB\ MEMORY  /home/your_user_name/mnt/pen msdosfs rw,noauto 0
> > 0
> >
> > > (Edit that line to suit your needs)
> > >
> > > Reboot
> > >
> > > Done ...
> >
> > I prefer to have a script do the mounting, so I can add some sane flags
> > to mount_msdosfs that you cannot put in options/fstab AFAICT, like
> > '-m 644 -M 755 -l -o noatime -o sync -o noexec -o nosuid'.
> >
> > Roland
> 
> There you go Pieter ... a simple example (mine) and a more in-depth one 
> (Roland's) on how to get your pendrive to work :)
> 
> Thanks for improving on my simple example Roland =D

In a separate reply from Giorgos Keramidas I learned that you can put
_all_ types of options in fstab, not just the -o options! So the
improved example would be (where USER is your username):

/dev/msdosfs/USB\ MEMORY  /home/USER/mnt/pen msdosfs rw,noauto,noatime,sync,noexec,nosuid,-m=644,-M=755,-l,-u=USER,-g=USER  0  0

A more elegant solution would be to write a script that is called from
devd whenever a /dev/msdosfs device appears. It should then create a
directory named after the label in /home/USER/mnt, and mount the fs
there with appropriate permissions. The hard thing is to do this
correctly on a machine with multiple (concurrent) local users. 

Roland
-- 
R.F.Smith                                   http://www.xs4all.nl/~rsmith/
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