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


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


   sane-find-scanner  is a command-line tool to find SCSI and USB scanners
   and determine their Unix device files. Its primary aim is to make  sure
   that scanners can be detected by SANE backends.

   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 also tries to find out the
   type of USB chip used in the scanner. If detected, it will  be  printed
   after the vendor and product ids.  sane-find-scanner will even find USB
   scanners, that are not supported by any SANE backend.

   sane-find-scanner won't find most parallel port scanners,  or  scanners
   connected  to  proprietary  ports.  Some  parallel port scanners may be
   detected by sane-find-scanner -p.  At the time  of  writing  this  will
   only detect Mustek parallel port scanners.


   -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 descriptors are also printed.

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

   -p      Probe parallel port scanners.

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

   -F filename
           filename  is a file that contains USB descriptors in the format
           of /proc/bus/usb/devices as used by  Linux.   sane-find-scanner
           tries  to  identify the chipset(s) of all USB scanners found in
           such a file. This option is  useful  for  developers  when  the
           output  of  "cat  /proc/bus/usb/devices"  is  available but the
           scanner itself isn't.

   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 file.

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

   sane-find-scanner -p
   Probe for parallel port scanners.


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


   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, OpenBSD, and HP-UX.


   No support for most parallel port scanners yet.
   Detection of USB chipsets is limited to a few chipsets.

                              13 Jul 2008             sane-find-scanner(1)


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