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

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

SYNOPSIS
       sane-find-scanner [-?|-h|--help]	[-v] [-q] [-p] [-f] [-F	filename] [de-
       vname]

DESCRIPTION
       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.

OPTIONS
       -?, -h, --help
	       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.

EXAMPLE
       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.

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

AUTHOR
       Oliver Rauch, Henning Meier-Geinitz and others

SUPPORTED PLATFORMS
       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.

BUGS
       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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