If you only have one scanner, you don't need to name the device. Where do you see those libusb error messages?
allan On Tue, Jun 10, 2014 at 4:57 PM, gobo <[email protected]> wrote: > thanks for the reply. > > changed my approach and used scanimage -f "%d" to capture the device > in my script. this works well enough since i have only one scanner. > > is there a way to suppress the > > libusb couldn't open USB device /dev/bus/usb/001/001: Permission denied. > libusb requires write access to USB device nodes. > > messages libusb puts out? not a problem, just an annoyance. > > > thanks. > > > On 6/9/14, Olaf Meeuwissen <[email protected]> wrote: >> gobo writes: >> >>> generally, i know how to write udev rules. but i'm not sure how to >>> write one for libsane. >>> >>> scanimage -L returns something like: >>> device `canon_dr:libusb:001:002' is a CANON DR-2580C scanner >>> >>> where the 001:002 is always changing. :005, :008, etc. >>> >>> so in 55-libsane.rules there is: >>> # Canon DR-2580C >>> ATTR{idVendor}=="04a9", ATTR{idProduct}=="1608", MODE="0664", >>> GROUP="lp", ENV{libsane_matched}="yes" >>> >>> what do i add to the rule to force this device to always have the same >>> libusb name? >> >> In short, you can't. >> >> You can assign a value to the SYMLINK key in a udev rule. That will >> dutifully create a device with that name no matter what bus and device >> number it has. However, as long as the canon_dr backend (or probably >> most any backend) creates device names using the bus and device numbers, >> you are out of luck. >> >> Hope this clarifies, >> -- >> Olaf Meeuwissen, LPIC-2 FLOSS Engineer -- AVASYS CORPORATION >> FSF Associate Member #1962 Help support software freedom >> http://www.fsf.org/jf?referrer=1962 >> > > -- > sane-devel mailing list: [email protected] > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > to [email protected] -- "The truth is an offense, but not a sin" -- sane-devel mailing list: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
