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|-?]  [-v] [-q] [-p] [-f] [-F filename] [devname]


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
       "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.


OPTIONS
       -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.

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
       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.


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)
