[Tfug] Got a good one here: Paul's printer paradox

[JD Rogers]

I second Ian's suggestion. I had to do something similar for accessing
a usb license dongle from within qemu.

There are howto's out there, but I created a group called "usbusers",
added the user to the group, created a file:
/etc/udev/rules.d/60-zemaxkey.rules
SUBSYSTEM!="usb_device", ACTION!="add", GOTO="key_rules_end"
# Zemax Key
SYSFS{idVendor}=="04b9", SYSFS{idProduct}=="8000", GROUP="usbusers", MODE="0660"
LABEL="key_rules_end"

Obviously, you need to change the idVendor and product number to match
the printer or scanner. I forget if there are any other steps, but
that along with some googling ought to get you there.

On Sun, May 6, 2012 at 5:52 PM, Ian McEwen
<ianmcorvidae at ianmcorvidae.net> wrote:
> I'd research udev; you can probably give the device a persistent
> identifier and set permissions using a udev script. I've seen similar
> things done for e.g. automounting USB without needing all the GNOME/KDE
> cruft.
>
> On Sun, May 06, 2012 at 03:15:57PM -0700, Jim March wrote:
>> I have a buddy name of Paul.  He has a new scanner/printer thing by
>> Brother, an MFC-9325CW.  I got all the drivers off of Brother's site - he's
>> running Mint 12 32bit (similar to Ubuntu Oneiric).
>>
>> I have everything working, but there's a quirk in the scanner (USB
>> connected, where the printer is wireless).  When I start xsane it throws a
>> permissions error.
>>
>> The cure is to first, do an lsusb like so:
>>
>> sharon at sharon-Compaq-Presario-
>> CQ50-Notebook-PC ~ $ lsusb
>> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>> Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>> Bus 002 Device 002: ID 04f9:029f Brother Industries, Ltd
>> Bus 004 Device 002: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser
>>
>> THEN, based on the bus and device ID, I have to craft a chmod command - in
>> the above case, like so:
>>
>> sudo chmod a+w /dev/bus/usb/004/002
>>
>> I can then start up xsane and it works great.
>>
>> BUT, I get different USB bus and device IDs at every boot, so...this isn't
>> a persistent solution.
>>
>> Right now I have an ugly hack in there: in their taskbar icon for xsane I
>> added "gksudo" first, to run xsane as root.  This too works, so long as you
>> agree to xsane's severe warning against the practice.
>>
>> What I need is a quick script that runs lsusb, queries the bus and device
>> IDs for the line with "Brother" in it, and then spits that out into a chmod
>> command and then runs xsane.  Package that as a desktop icon and call it
>> good, right?
>>
>> Or is there another persistent way to skin this cat?
>>
>> If it was just for me, I'd say screw it and just run lsusb and chmod when I
>> want to scan (which for most folk isn't that often) but...they're not real
>> geeky...
>>
>> Help?
>>
>> I've BCCed Paul on this :).
>>
>> Jim
>
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>
> --
> Ian McEwen <ianmcorvidae at ianmcorvidae.net> <ihm08 at hampshire.edu>
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> http://ianmcorvidae.net/
>
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