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authorJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:01:59 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2014-10-06 14:01:59 +0200
commitba8d09abe681600aad991f4a75e904615b7ed29f (patch)
tree0dd1472607450fac076ef4986c654c537153a1e8 /debian/libsane.README.Debian
parent6e9c41a892ed0e0da326e0278b3221ce3f5713b8 (diff)
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-libsane (sane-backends) for Debian :
-------------------------------------
-
-GENERAL
--------
-
-The configuration files for Debian releases of SANE are located in /etc/sane.d.
-
-The dll pseudo-backend is responsible for loading other SANE backends that
-provide support for the actual hardware. Which backends are loaded is
-determined by the contents of the /etc/sane.d/dll.conf file. The dll
-pseudo-backend also checks for dll.conf snippets in /etc/sane.d/dll.d; any
-file in this directory that doesn't look like a backup file will be treated
-as a configuration snippet.
-
-This facility is used by packages providing external backends (like
-libsane-extras, hpoj or hplip) to "register" the backends they provide without
-much hassle.
-
-Each backend has a configuration file which specifies which devices,
-access methods, options etc. should be used by this backend. The format
-and content of each configuration file is documented in the manpage for
-the backend, e.g. sane-plustek (5).
-
-For USB and some SCSI scanners, the parameters can be auto-detected, and
-manual configuration is not required. If the auto-detection fails, read
-the next paragraph. Again, see the manpage for your backend for more
-information.
-
-For SCSI devices (mostly scanners), the configuration files use the
-/dev/scanner device; /dev/scanner is a symbolic link to the appropriate
-SCSI device node. It's up to you to create this symbolic link, once you
-will have determined which device node it needs to point to. Use the
-sane-find-scanner command in the sane-utils package to determine which
-SCSI device your scanner is attached to. The sane-find-scanner utility
-also discovers USB scanners.
-
-It can be a good idea to try running sane-find-scanner as root to ensure
-there will be no permissions problems while attempting to detect your
-devices.
-
-
-DOCUMENTATION
--------------
-
-For information on configuring and trouble-shooting the various SANE
-components, please refer to the manual pages listed below:
-
- Regarding: Read:
- ----------------- ------------------------------------------
- General sane(7) -- your starting point
-
- scanimage scanimage(1)
- xscanimage xscanimage(1)
- saned saned(8)
- xcam xcam(1)
-
- Dynamic loading sane-dll(5)
- Backends See sane-<backend name>(5). Each backend
- comes with a manual page in section 5 of
- the manual system.
-
-
-SETUP
------
-
-In this day and age, SANE integrates with udev and ConsoleKit seemlessly; this
-means users physically logged into the machine (as opposed to users logged in
-remotely via SSH) have access to the scanners by default.
-
-The solution proposed below is a legacy setup that remains valid for sharing
-scanners with saned or for systems that don't use ConsoleKit. Note that this is
-only a proposed solution, you are free to come up with and implement whatever
-access control mechanism you see fit.
-
-This package added a scanner group to your system. We recommend you add to
-this group the users that should be able to access your scanner(s), and
-make sure the appropriate device files (eg. /dev/sg0, ...) are owned by root
-and the scanner group, with permissions set to 0660.
-
-For USB and SCSI scanners, the permissions will be automatically set by udev;
-the /lib/udev/rules.d/60-libsane.rules file contains a list of USB and SCSI
-scanners supported by SANE.
-
-The udev rules now use ACLs instead of standard UNIX permissions; the scanner
-group is added to the ACLs for the corresponding device(s) with read+write
-permissions.
-
-If your scanner is missing from the list, do NOT modify this file; it is not
-a configuration file, which means your changes WILL be overwritten upon
-upgrade. Instead, create /etc/udev/rules.d/60-libsane.rules and add the udev
-rule for your scanner in this file. /lib/udev/rules.d/60-libsane.rules will
-then be ignored by udev and /etc/udev/rules.d/60-libsane.rules will be used
-instead.
-
-Feel free to file a bug report (severity wishlist) against the libsane package
-to get your scanner added; please mention which backend you use and how well
-the scanner is supported (basic, good, ...).
-
- Note: please do not file bugs requesting the addition of scanners that
- aren't supported by the libsane package. For these devices, bugs should
- be filed against the Debian package providing support for the device, if
- such a package does exist.
-
-udev will automatically set up the permissions and ownership on the device
-node corresponding to your scanner according to the rules defined in the
-libsane.rules file (default is root:scanner, 0664). If you want to execute
-a script when your scanner is plugged in, add RUN+="/path/to/script" to the
-rule matching your scanner.
-
-
-TROUBLESHOOTING
----------------
-
-If your scanner does not work, edit the file /etc/sane.d/dll.conf.
-Verify that your scanner is not commented out. You may need to
-comment out all other scanners in dll.conf. It shouldn't matter, but
-sometimes it does.
-
-The most common cause for a non-working scanner is inappropriate
-permissions on the device. So your first reflex should be to check the
-permissions of the device used to access your scanner, e.g. /dev/sg0
-or the device pointed to by /dev/scanner.
-
-
-If you encounter any problems with getting your device(s) recognized,
-try setting the various environment variables that are there to assist
-in debugging such problems. The environment variables are documented
-in the relevant manual pages. For example, to get the maximum amount
-of debug information when testing a Mustek scanner, set environment
-variables SANE_DEBUG_DLL, SANE_DEBUG_MUSTEK, and SANE_DEBUG_SANEI_SCSI
-to 128 and then invoke scanimage or whatever program you're trying to
-debug. For a Mustek SCSI scanner at /dev/scanner, you might want to
-invoke scanimage as follows:
-
- scanimage -d mustek:/dev/scanner -h
-
-If this works, you could try to acquire an image with:
-
- scanimage -d mustek:/dev/scanner > t.pnm
-
-If you are not sure what generic SCSI device your scanner is connected
-to, try the command sane-find-scanner (sane-utils package). It is
-normally sufficient to invoke the program without any arguments. Invoking
-this command should produce output similar to this:
-
- $ sane-find-scanner
- sane-find-scanner: found "MUSTEK MFC-06000CZ 1.01" at device /dev/sge
-
-sane-find-scanner will help you discover your USB scanner, too.
-
-
-REPORTING BUGS
---------------
-
-When reporting a bug, be it to the SANE developers or to the Debian bug
-tracking system, pleases always provide:
- - the full version of libsane
- - the backend you're using
- - the configuration of the backend
- - the debug output, obtained by setting the environment variable
- SANE_DEBUG_<backendname> to a value of 255 (see above, TROUBLESHOOTING)
-
-Without that, your bug report will take longer to be processed, because we'll
-need to ask you for each of these items. Please help us help you.
-
-
-UNSUPPORTED DEVICES AND SPECIFIC NOTES
---------------------------------------
-
-If your scanner (or camera, or whatever) is not supported by the regular
-SANE distribution, have a look at the libsane-extras package which contains
-some backends not yet included in the regular SANE distribution.
-
-
--- Julien BLACHE <jblache@debian.org>, Wed, 16 Feb 2011 19:00:12 +0100