kopia lustrzana https://gitlab.com/sane-project/website
165 wiersze
6.6 KiB
HTML
165 wiersze
6.6 KiB
HTML
<HTML>
|
||
<HEAD>
|
||
<TITLE>sane-dll.5</TITLE>
|
||
</HEAD>
|
||
<BODY BGCOLOR=#FFFFFF TEXT=#000000><H1 ALIGN=CENTER><IMG SRC="/images/sane.png" HEIGHT=117 WIDTH=346></H1>
|
||
<H1>sane-dll.5</H1>
|
||
<HR>
|
||
<PRE>
|
||
<!-- Manpage converted by man2html 3.0.1 -->
|
||
<B><A HREF="sane-dll.5.html">sane-dll(5)</A></B> SANE Scanner Access Now Easy <B><A HREF="sane-dll.5.html">sane-dll(5)</A></B>
|
||
|
||
|
||
</PRE>
|
||
<H2>NAME</H2><PRE>
|
||
sane-dll - SANE dynamic backend loader
|
||
|
||
|
||
</PRE>
|
||
<H2>DESCRIPTION</H2><PRE>
|
||
The <B>sane-dll</B> library implements a SANE (Scanner Access Now Easy) back‐
|
||
end that provides access to an arbitrary number of other SANE backends.
|
||
These backends may either be pre-loaded at the time the <B>sane-dll</B>
|
||
library is built or, on systems that support dynamic loading of shared
|
||
libraries, the backends may be loaded at runtime. In the latter case,
|
||
adding support for a new backend simply involves installing the rele‐
|
||
vant library in <I>/usr/lib/sane</I> and adding an entry to the <I>dll.conf</I> con‐
|
||
figuration file. In other words, no applications need to be modified
|
||
or recompiled to add support for new devices.
|
||
|
||
|
||
</PRE>
|
||
<H2>DEVICE NAMES</H2><PRE>
|
||
This backend expects device names of the form:
|
||
|
||
<I>backend</I>:<I>device</I>
|
||
|
||
Where <I>backend</I> is the name of the backend and <I>device</I> is the name of the
|
||
device in this backend that should be addressed. If the device name
|
||
does not contain a colon (:), then the entire string is treated as the
|
||
<I>device</I> string for the default backend. The default backend is the
|
||
backend listed last in the configuration file (see below) or the first
|
||
pre-loaded backend (if any).
|
||
|
||
|
||
</PRE>
|
||
<H2>CONFIGURATION</H2><PRE>
|
||
The contents of the <I>dll.conf</I> file is a list of backend names that may
|
||
be loaded dynamically upon demand. Empty lines are ignored, also
|
||
everything after a hash mark (#). A sample configuration file is shown
|
||
below:
|
||
|
||
net
|
||
# this is a comment
|
||
pnm
|
||
mustek
|
||
|
||
It is also possible to add a file in <I>/etc/sane.d/dll.d</I> that contains
|
||
the list of backends to be added. Backends mentioned in a file included
|
||
in this directory will be added before any backends listed in <I>dll.conf.</I>
|
||
Files in <I>/etc/sane.d/dll.d</I> can be freely named. They shall follow the
|
||
format conventions as apply for <I>dll.conf.</I>
|
||
|
||
Note that backends that were pre-loaded when building this library do
|
||
not have to be listed in this configuration file. That is, if a back‐
|
||
end was preloaded, then that backend will always be present, regardless
|
||
of whether it's listed in the configuration file or not.
|
||
|
||
The list of preloaded backends is determined by macro <B>PRELOADABLE_BACK</B><EFBFBD><EFBFBD><B><EFBFBD></B><EFBFBD><EFBFBD>
|
||
<B>ENDS</B> in file backend/Makefile.in of the SANE source code distribution.
|
||
After changing the value of this macro, it is necessary to reconfigure,
|
||
rebuild, and reinstall SANE for the change to take effect.
|
||
|
||
Aliases are defined in the config file <I>dll.aliases</I>. It can contain
|
||
entries of the form
|
||
|
||
alias SomeName SaneDeviceName
|
||
alias "Some Name" SaneDeviceName
|
||
hide SaneDeviceName
|
||
|
||
For example:
|
||
|
||
alias Epson net:somehost:epson:/dev/sgX
|
||
alias "Siemens ST400" st400:/dev/sgY
|
||
hide net:somehost:pnm:0
|
||
hide net:somehost:pnm:1
|
||
alias "Read from file" pnm:0
|
||
hide pnm:1
|
||
|
||
Aliased device names are automatically hidden.
|
||
|
||
The idea is that users don't have to deal with complicated device names
|
||
(especially for networked devices), and to hide other exported devices
|
||
which might confuse them. Note that a hidden device can still be
|
||
accessed if the device name is known, it just doesn't appear on the
|
||
list.
|
||
|
||
|
||
</PRE>
|
||
<H2>FILES</H2><PRE>
|
||
<I>/etc/sane.d/dll.aliases</I>
|
||
The list of aliased or hidden backends.
|
||
|
||
<I>/etc/sane.d/dll.conf</I>
|
||
The backend configuration file (see also description of
|
||
<B>SANE_CONFIG_DIR</B> below).
|
||
|
||
<I>/usr/lib/sane/libsane-dll.a</I>
|
||
The static library implementing this backend.
|
||
|
||
<I>/usr/lib/sane/libsane-dll.so</I>
|
||
The shared library implementing this backend (present on systems
|
||
that support dynamic loading).
|
||
|
||
|
||
</PRE>
|
||
<H2>ENVIRONMENT</H2><PRE>
|
||
<B>SANE_CONFIG_DIR</B>
|
||
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 config‐
|
||
uration 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 sepa‐
|
||
rator character, then the default directories are searched after
|
||
the explicitly specified directories. For example, setting
|
||
<B>SANE_CONFIG_DIR</B> to "/tmp/config:" would result in directories
|
||
"tmp/config", ".", and "/etc/sane.d" being searched (in this
|
||
order).
|
||
|
||
<B>SANE_DEBUG_DLL</B>
|
||
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.
|
||
|
||
Value Description
|
||
0 print severe errors only
|
||
1 print normal errors and important messages
|
||
2 print normal messages
|
||
3 print debugging messages
|
||
4 print everything
|
||
|
||
Example: export SANE_DEBUG_DLL=3
|
||
|
||
|
||
</PRE>
|
||
<H2>SEE ALSO</H2><PRE>
|
||
<B><A HREF="sane.7.html">sane(7)</A></B>, <B><A HREF="scanimage.1.html">scanimage(1)</A></B>, <B>sane-"backendname"</B>(5)
|
||
|
||
|
||
</PRE>
|
||
<H2>AUTHOR</H2><PRE>
|
||
David Mosberger
|
||
|
||
13 Jul 2008 <B><A HREF="sane-dll.5.html">sane-dll(5)</A></B>
|
||
</PRE>
|
||
<HR>
|
||
<ADDRESS>
|
||
Man(1) output converted with
|
||
<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
|
||
</ADDRESS>
|
||
</BODY>
|
||
</HTML>
|