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<TITLE>sane-devel: Re: sm3600 SANE backend in the beam</TITLE>
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<META NAME="Author" CONTENT="Oliver Neukum (Oliver.Neukum@lrz.uni-muenchen.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 21:49:41 2001" -->
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<!-- name="Oliver Neukum" -->
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<!-- subject="Re: sm3600 SANE backend in the beam" -->
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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=<01040407043001.01575@idun>"><EM>Oliver.Neukum@lrz.uni-muenchen.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Tue Apr 03 2001 - 22:04:30 PDT
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<LI><STRONG>Next message:</STRONG> <A HREF="0023.html">Marian Eichholz: "Re: sm3600 SANE backend in the beam"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0021.html">Karl Heinz Kremer: "Re: Epson Timeout with 1240U PROBLEM"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0018.html">James Tappin: "Re: sm3600 SANE backend in the beam"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0023.html">Marian Eichholz: "Re: sm3600 SANE backend in the beam"</A>
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<P>
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Am Dienstag 03 April 2001 20:42 schrieben Sie:
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<BR>
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<EM>> On Tuesday 03 April 2001 16:25, you wrote:
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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
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</EM><BR>
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<EM>> > > I 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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<EM>>
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</EM><BR>
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<EM>> Check out <A HREF="http://www.xena.uklinux.net/Linux/usb_perms.html">http://www.xena.uklinux.net/Linux/usb_perms.html</A> for a quick and
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</EM><BR>
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<EM>> dirty daemon to fix the file permissions. I think that under 2.4, the
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</EM><BR>
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<EM>> hotplug capability will provide similar functionality.
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</EM><BR>
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<P>Hi,
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<BR>
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<P>this shows an admirable spirit, but the approach has an inherent race
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<BR>
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condition. You cannot know whether the device nodes whose permissions you set
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<BR>
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are still the correct ones. The risk, however, is small.
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<BR>
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<P>Hotplug should somewhen in the future provide this functionality. At present
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<BR>
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it has race conditions similar to those mentioned above.
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<BR>
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<P> Regards
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<BR>
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Oliver Neukum
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<BR>
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<P><PRE>
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--
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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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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20sm3600%20SANE%20backend%20in%20the%20beam&In-Reply-To=<01040407043001.01575@idun>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0023.html">Marian Eichholz: "Re: sm3600 SANE backend in the beam"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0021.html">Karl Heinz Kremer: "Re: Epson Timeout with 1240U PROBLEM"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0018.html">James Tappin: "Re: sm3600 SANE backend in the beam"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0023.html">Marian Eichholz: "Re: sm3600 SANE backend in the beam"</A>
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<EM>
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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 - 21:50:46 PDT</EM>
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