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sane-find-scanner(1)	 SANE Scanner Access Now Easy	  sane-find-scanner(1)

       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 "proces-
       sor"  (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  li-
       brary  libusb  (if  available). There is	no special USB class for scan-
       ners, so	the heuristics used to distinguish scanners from other USB de-
       vices  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 de-
       tected 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 de-
	       vice name and the test result.  If used twice, SCSI inquiry in-
	       formation 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 de-
	       vices. That's useful if sane-find-scanner is wrong in determin-
	       ing 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 out-
	       put 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 de-
	       vname 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  ven-
       dor 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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