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<TITLE>sane-devel: Re: sm3600 SANE backend in the beam</TITLE>
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<META NAME="Author" CONTENT="Marian Eichholz (marian.eichholz@freenet-ag.de)">
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<META NAME="Subject" CONTENT="Re: sm3600 SANE backend in the beam">
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<H1>Re: sm3600 SANE backend in the beam</H1>
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<!-- received="Tue Apr 3 08:10:37 2001" -->
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<!-- name="Marian Eichholz" -->
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<!-- subject="Re: sm3600 SANE backend in the beam" -->
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<STRONG>From:</STRONG> Marian Eichholz (<A HREF="mailto:marian.eichholz@freenet-ag.de?Subject=Re:%20sm3600%20SANE%20backend%20in%20the%20beam&In-Reply-To=<3AC9EB57.F97FDF16@freenet-ag.de>"><EM>marian.eichholz@freenet-ag.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Tue Apr 03 2001 - 08:25:11 PDT
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<LI><STRONG>In reply to:</STRONG> <A HREF="0008.html">Oliver Neukum: "Re: sm3600 SANE backend in the beam"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0018.html">James Tappin: "Re: sm3600 SANE backend in the beam"</A>
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<HR NOSHADE><P>
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<P>
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Oliver Neukum wrote:
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<BR>
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<P><EM>> > So we will apprechiate any information pointer for SANE integrations
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</EM><BR>
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<EM>> > aspects, especially how to
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</EM><BR>
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<EM>> > - link the backend as a SANE DLL module
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</EM><BR>
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<EM>> > - install the additional backend by hand
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</EM><BR>
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<EM>> > - address the usbfs root access issues in a sensible manner.
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> This is a general problem.
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</EM><BR>
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<EM>> You can either live with it and use saned over TCP/IP loopback, which I
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</EM><BR>
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<EM>> wouldn't recommend.
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</EM><BR>
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<EM>> Or you change the permissions and ownership on the usbdevfs entry.
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</EM><BR>
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<EM>> Or write a small kernel module.
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</EM><BR>
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<P>The alternatives all don't look too glorious. Perhaps we have to live
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<BR>
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with the usbfs contraints for now and put the basic communication
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<BR>
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(register transfers and bulk reading) into a stubby kernel module. I am
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<BR>
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not too happy with that perspective, as it makes thinks even more
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<BR>
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complicated as they are now, but at least the kernel module will be able
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<BR>
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to support the communication needs for all devices built on top of the
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<BR>
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Toshiba controller, since there are no semantics at all in the basic
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<BR>
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transfers.
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<BR>
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<P>A simple read / IOCTL interface will to the job.
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<BR>
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<P><EM>> As for portability, I only know that BSD has generic USB drivers as regular
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</EM><BR>
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<EM>> devices which will use the same permission system as all other device files.
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</EM><BR>
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<EM>> Is there any other Unix with USB support ?
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</EM><BR>
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<P>It looks as if portability is the least important problem for now. But
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<BR>
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we can keep it in mind.
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<BR>
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<P>Thank You, Oliver, for Your suggestions.
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<BR>
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<P><PRE>
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--
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Mit freundlichen Gruessen / Yours sincerely
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<P>Marian Eichholz
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<P>- - - - - - - - - - -
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Marian Eichholz
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Postmaster
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freenet.de AG Vorsitzender des Aufsichtsrates: Gerhard Schmid
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Deelb<EFBFBD>genkamp 4c Vorstand: Eckhard Spoerr (Vors.), Axel Krieger
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22297 Hamburg Amtsgericht Hamburg, HRB 74048
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<P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0017.html">Peck Dickens: "Re: 8x14 Scanners?"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0015.html">Steve Cranage: "Re: 8x14 Scanners?"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0008.html">Oliver Neukum: "Re: sm3600 SANE backend in the beam"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0018.html">James Tappin: "Re: sm3600 SANE backend in the beam"</A>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Tue Apr 03 2001 - 08:10:54 PDT</EM>
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