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sane-find-scanner(1)							     sane-find-scanner(1)

       sane-find-scanner - find SCSI and USB scanners and their device files

       sane-find-scanner [-h|-?]  [-v] [-q] [-f] [devname]

       sane-find-scanner  is a command-line tool to find SCSI and some USB scanners and determine
       their Unix device files. It's part of the sane-backends package.

       For SCSI scanners, it checks the default generic SCSI device files  (e.g.,  /dev/sg0)  and
       /dev/scanner.  The test is done by sending a SCSI inquiry command and looking for a device
       type of "scanner" or "processor" (some old HP scanners seem to send "processor"). So sane-
       find-scanner will find any SCSI scanner connected to those default device files even if it
       isn't supported by any SANE backend.

       For USB scanners, first the USB kernel  scanner	device	files  (e.g.  /dev/usb/scanner0),
       /dev/usb/scanner,  and /dev/usbscanner are tested. The files are opened and the vendor and
       device ids are determined if the operating system supports  this  feature.  Currently  USB
       scanners  are only found this way if they are supported by the Linux scanner module or the
       FreeBSD or OpenBSD uscanner driver. After that test, sane-find-scanner tries to	scan  for
       USB  devices found by the USB library libusb (if available). There is no special USB class
       for scanners, so the heuristics used to distinguish scanners from other USB devices is not
       perfect. sane-find-scanner will even find USB scanners, that are not supported by any SANE

       sane-find-scanner won't find parallel port scanners, or scanners connected to  proprietary

       -h, -?  Prints a short usage message.

       -v      Verbose	output.  If  used once, sane-find-scanner shows every device name and the
	       test result.  If used twice, SCSI inquiry information and the USB device  descrip-
	       tors are also printed.

       -q      Be quiet. Print only the devices, no comments.

       -f      Force opening all explicitely given devices as SCSI and USB devices. That's useful
	       if sane-find-scanner is wrong in determing the device type.

       devname Test device file "devname". No other devices are checked if devname is given.

       sane-find-scanner -v
       Check all SCSI and USB devices for available scanners and print a line  for  every  device

       sane-find-scanner /dev/scanner
       Look for a (SCSI) scanner only at /dev/scanner and print the result.

       sane(7),  sane-scsi(5), sane-usb(5), scanimage(1), xscanimage(1), xsane(1), sane-"backend-

       Oliver Rauch, Henning Meier-Geinitz and others

       USB support is limited  to  Linux  (kernel,  libusb),  FreeBSD  (kernel,  libusb),  NetBSD
       (libusb),  OpenBSD  (kernel,  libusb). Detecting the vendor and device ids only works with
       Linux or libusb.

       SCSI support is available on Irix, EMX, Linux, Next, AIX, Solaris, FreeBSD, NetBSD,  Open-
       BSD, and HP-UX.

       No support for parallel port scanners yet.

					   15 Sep 2002			     sane-find-scanner(1)
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