Hi, > The patch only works for libusb devices. Applying it as is means the > backend will now fail hard if you're using a non-pthread build of SANE > with a non-libusb access method. > > I'm not sure such a combination exists. If I'm not mistaken, OS/2 uses > pthread by default, so does OS X and all other OSes use libusb.
If I read your patch correctly it would also break support for the old USB access by device /dev/usb/scanner0 on Linux 2.4.x (or was it 2.2.x?) without libusb. Maybe it's a good idea to fall back to the old ftok() method if the device name doesn't start with "libusb:". Apart from that the patch looks ok to me. Regards, Oliver
