Re: scanning software

[Richard E Miles]

On Sun, 28 Nov 2004 21:04:48 -0500 (EST)
[e-mail] wrote:
> > Am So, den 28.11.2004 schrieb Nathan Low um 23:59:
> > > I entered xsane and pressed enter then I clicked the
> > > agreement for accept.  It didn't detect my scanner.
> >
> > My crystal ball has actually a blind point where your scanner hardware
> > should appear.
>
> Surely, you jest! ;-)
>
> That brings up a question about devices, though.
>
> My scanner is a Umax 1200S SCSI machine that appears at /dev/sg0. This 
> device comes equipped with permissions set to (I believe) 644 following 
> a boot. This means that I must either don my root cape or change the 
> permissions to 666 to use xsane.  I would really like to know the 
> *proper* way to set the permissions for that device. I stuck a line in 
> /etc/rc.d/rc.local that reads "chmod 666 /dev/sg* &" but I would bet 
> there's a correct way to do it.

I don't know that it may be proper but you can change the permissions in:
/etc/udev/permissions.d/50-udev.permissions
Look for sg in scsi area.

scanning software

[James Wilkinson]

Richard E Miles wrote:
> I don't know that it may be proper but you can change the permissions in:
> /etc/udev/permissions.d/50-udev.permissions
> Look for sg in scsi area.

I understand from http://fedora.redhat.com/docs/udev/ and
rpm -qf /etc/udev/permissions.d/50-udev.permissions
that this file belongs to an RPM, which is liable to get upgraded, and
you'll be responsible for merging your changes and Fedora's.

# New permissions should be placed in a file, which ends in .permissions
# in /etc/udev/permissions.d/. Please do not use 50-udev.permissions.

man udev says that files are read "in lexical order", which should mean
that anything beginning 00 to 49 will be read before 50-udev.permissions
and presumably over-ride it.

James (wading through a backlog of ~2000 list e-mails...)