sane-net(5)							File Formats Manual						       sane-net(5)

NAME

       sane-net - SANE network backend

DESCRIPTION

       The  sane-net  library implements a SANE (Scanner Access Now Easy) backend that provides access to image acquisition devices through a net-
       work connection.  This makes it possible to control devices attached to a remote host and also provides a means to grant  users	access	to
       protected resources.

DEVICE NAMES

       This backend expects device names of the form:

	      host:device

       Where  host  is	the  name of the (remote-) host and device is the name of the device on this host that should be addressed.  If the device
       name does not contain a colon (:), then the entire string is treated as the device string for the default host.	The default  host  is  the
       host listed last in the configuration file (see below).

CONFIGURATION

       The  contents  of  the  net.conf.  file is a list of host names that should be contacted for scan requests.  Empty lines and lines starting
       with a hash mark (#) are ignored.  A sample configuration file is shown below:

	      scan-server.somedomain.firm
	      # this is a comment
	      localhost

       The above list of host names can be extended at run-time using environment variable SANE_NET_HOSTS.  This environment variable is a  colon-
       separated  list	of  hostnames  that should be contacted in addition to the hosts mentioned in the configuration file.  For example, a user
       could set the environment variable to the string:

	      new.scanner.com:scanner.univ.edu

       To request that hosts new.scanner.com and scanner.univ.edu are contacted in addition to the hosts listed above.

       For this backend to function properly, it is also necessary to define the sane service in /etc/services.   At  present,	the  sane  service
       should be defined using a line of the following form:

	      sane 6566/tcp # SANE network scanner daemon

FILES

       /etc/sane.d/net.conf
	      The backend configuration file (see also description of SANE_CONFIG_DIR below).

       /usr/lib/sane/libsane-net.a
	      The static library implementing this backend.

       /usr/lib/sane/libsane-net.so
	      The shared library implementing this backend (present on systems that support dynamic loading).

ENVIRONMENT

       SANE_CONFIG_DIR
	      This  environment  variable  specifies the list of directories that may contain the configuration file.  Under UNIX, the directories
	      are separated by a colon (`:'), under OS/2, they are separated by a semi-colon (`;').  If this variable is not set,  the	configura-
	      tion  file is searched in two default directories: first, the current working directory (".") and then in /etc/sane.d.  If the value
	      of the environment variable ends with the directory separator character, then the default directories are searched after the explic-
	      itly  specified  directories.  For example, setting SANE_CONFIG_DIR to "/tmp/config:" would result in directories "tmp/config", ".",
	      and "/etc/sane.d" being searched (in this order).

       SANE_NET_HOSTS
	      A colon-separated list of host names to be contacted by this backend.

       SANE_DEBUG_NET
	      If the library was compiled with debug support enabled, this environment variable controls the debug level for this backend.   E.g.,
	      a value of 128 requests all debug output to be printed.  Smaller levels reduce verbosity.

BUGS

       If saned has timed out, the net backend may loop with authorization requests.

SEE ALSO

       sane(7), saned(1), sane-dll(5), scanimage(1)

       http://www.penguin-breeder.org/?page=sane-net

AUTHOR

       David Mosberger and Andreas Beck

								    8 Oct 2002							       sane-net(5)