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<TITLE>sane-devel: Re: sm3600 SANE backend in the beam</TITLE>
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<H1>Re: sm3600 SANE backend in the beam</H1>
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<STRONG>From:</STRONG> Oliver Neukum (<A HREF="mailto:Oliver.Neukum@lrz.uni-muenchen.de?Subject=Re:%20sm3600%20SANE%20backend%20in%20the%20beam&In-Reply-To=&lt;01040218442306.01575@idun&gt;"><EM>Oliver.Neukum@lrz.uni-muenchen.de</EM></A>)<BR>
<STRONG>Date:</STRONG> Mon Apr 02 2001 - 09:44:23 PDT
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Am Montag 02 April 2001 17:25 schrieben Sie:
<BR>
<EM>&gt; Hello,
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; Glenn Ramsey and me wrote a scanning application for the Microtek 3600
</EM><BR>
<EM>&gt; USB scanner. It is pure reverse engineering, since we got no information
</EM><BR>
<EM>&gt; at all from Microtek until now. Thus the driver uses very much magic
</EM><BR>
<EM>&gt; control values. But it works for at least Glenn and me. And if You test
</EM><BR>
<EM>&gt; it with us, we can make it just better.
</EM><BR>
<P>Great work !
<BR>
<P>[..]
<BR>
<EM>&gt; So we will apprechiate any information pointer for SANE integrations
</EM><BR>
<EM>&gt; aspects, especially how to
</EM><BR>
<EM>&gt; - link the backend as a SANE DLL module
</EM><BR>
<EM>&gt; - install the additional backend by hand
</EM><BR>
<EM>&gt; - address the usbfs root access issues in a sensible manner.
</EM><BR>
<P>This is a general problem.
<BR>
You can either live with it and use saned over TCP/IP loopback, which I
<BR>
wouldn't recommend.
<BR>
Or you change the permissions and ownership on the usbdevfs entry.
<BR>
Or write a small kernel module.
<BR>
If you have libusb available under a range of platforms this is more portable.
<BR>
However the permissions solution works on Linux and only with usb hotplugging
<BR>
support (or manually which is too ugly to let live).
<BR>
You clearly cannot use the existing kernel drivers.
<BR>
As for portability, I only know that BSD has generic USB drivers as regular
<BR>
devices which will use the same permission system as all other device files.
<BR>
Is there any other Unix with USB support ?
<BR>
<P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Regards
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Oliver Neukum
<BR>
<P><PRE>
--
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