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<TITLE>sane-net.5</TITLE>
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<BODY BGCOLOR=#FFFFFF TEXT=#000000><H1 ALIGN=CENTER><IMG SRC="/images/sane.png" HEIGHT=117 WIDTH=346></H1>
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<H1>sane-net.5</H1>
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<HR>
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<PRE>
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<!-- Manpage converted by man2html 3.0.1 -->
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<B><A HREF="sane-net.5.html">sane-net(5)</A></B> SANE Scanner Access Now Easy <B><A HREF="sane-net.5.html">sane-net(5)</A></B>
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</PRE>
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<H2>NAME</H2><PRE>
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sane-net - SANE network backend
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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The <B>sane-net</B> library implements a SANE (Scanner Access Now Easy) back-
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end that provides access to image acquisition devices through a network
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connection. This makes it possible to control devices attached to a
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remote host and also provides a means to grant users access to pro-
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tected resources.
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</PRE>
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<H2>DEVICE NAMES</H2><PRE>
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This backend expects device names of the form:
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<I>host</I>:<I>device</I>
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Where <I>host</I> is the name (or IP address) of the (remote-) host and <I>device</I>
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is the name of the device on this host that should be addressed. If
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the device name does not contain a colon (:), then the entire string is
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treated as the <I>device</I> string for the default host. The default host is
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the host listed last in the configuration file (see below).
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An IPv6 address can be specified enclosed in square brackets:
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<I>[::1]</I>:<I>device</I>
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</PRE>
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<H2>CONFIGURATION</H2><PRE>
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The contents of the <I>net.conf</I> file is a list of host names (or IP
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addresses) that should be contacted for scan requests. Empty lines and
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lines starting with a hash mark (#) are ignored. Note that IPv6
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addresses in this file do not need to be enclosed in square brackets.
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A sample configuration file is shown below:
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scan-server.somedomain.firm
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192.168.0.1
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# this is a comment
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localhost
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::1
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The above list of hosts can be extended at run-time using environment
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variable <B>SANE_NET_HOSTS</B>. This environment variable is a colon-sepa-
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rated list of hostnames or IP addresses that should be contacted in
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addition to the hosts mentioned in the configuration file. For exam-
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ple, a user could set the environment variable to the string:
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new.scanner.com:[::1]:192.168.0.2:scanner.univ.edu
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To request that hosts <I>new.scanner.com</I> , <I>[::1]</I> , <I>192.168.0.2</I> and <I>scan-</I>
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<I>ner.univ.edu</I> are contacted in addition to the hosts listed above.
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For this backend to function properly, it is also necessary to define
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the <B>sane-port</B> service in <I>/etc/services</I>. The <B>sane</B> service should be
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defined using a line of the following form:
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sane-port 6566/tcp # SANE network scanner daemon
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</PRE>
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<H2>FILES</H2><PRE>
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<I>/usr/local/etc/sane.d/net.conf</I>
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The backend configuration file (see also description of
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<B>SANE_CONFIG_DIR</B> below).
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<I>/usr/local/lib/sane/libsane-net.a</I>
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The static library implementing this backend.
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<I>/usr/local/lib/sane/libsane-net.so</I>
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The shared library implementing this backend (present on systems
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that support dynamic loading).
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</PRE>
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<H2>ENVIRONMENT</H2><PRE>
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<B>SANE_CONFIG_DIR</B>
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This environment variable specifies the list of directories that
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may contain the configuration file. Under UNIX, the directories
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are separated by a colon (`:'), under OS/2, they are separated
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by a semi-colon (`;'). If this variable is not set, the config-
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uration file is searched in two default directories: first, the
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current working directory (".") and then in
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/usr/local/etc/sane.d. If the value of the environment variable
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ends with the directory separator character, then the default
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directories are searched after the explicitly specified directo-
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ries. For example, setting <B>SANE_CONFIG_DIR</B> to "/tmp/config:"
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would result in directories "tmp/config", ".", and
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"/usr/local/etc/sane.d" being searched (in this order).
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<B>SANE_NET_HOSTS</B>
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A colon-separated list of host names or IP addresses to be con-
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tacted by this backend.
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<B>SANE_DEBUG_NET</B>
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If the library was compiled with debug support enabled, this
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environment variable controls the debug level for this backend.
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E.g., a value of 128 requests all debug output to be printed.
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Smaller levels reduce verbosity.
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</PRE>
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<H2>BUGS</H2><PRE>
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If saned has timed out, the net backend may loop with authorization
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requests.
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<B><A HREF="sane.7.html">sane(7)</A></B>, <B><A HREF="saned.8.html">saned(8)</A></B>, <B><A HREF="sane-dll.5.html">sane-dll(5)</A></B>, <B><A HREF="scanimage.1.html">scanimage(1)</A></B>
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<I>http://www.penguin-breeder.org/?page=sane-net</I>
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</PRE>
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<H2>AUTHOR</H2><PRE>
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David Mosberger and Andreas Beck
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sane-backends 1.0.18 8 Oct 2002 <B><A HREF="sane-net.5.html">sane-net(5)</A></B>
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</PRE>
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