sane-project-website/old-archive/1998-07/0111.html

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<!-- name="Jon Knight" -->
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<title>sane-devel: Re: developing plustek driver-- questions</title>
<h1>Re: developing plustek driver-- questions</h1>
<b>Jon Knight</b> (<a href="mailto:jon@net.lut.ac.uk"><i>jon@net.lut.ac.uk</i></a>)<br>
<i>Tue, 21 Jul 1998 17:00:23 +0100 (BST)</i>
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On Mon, 20 Jul 1998, Antal Novak wrote:<br>
<i>&gt; Also, for parallel port scanners, how should a backend determine the port</i><br>
<i>&gt; to use for the scanner?  Although 0x378 is all but standard, I would like</i><br>
<i>&gt; to make this as portable as possible.  Should it simply read that from its</i><br>
<i>&gt; config file, I wonder?</i><br>
<p>
My thoughts on this part was to make a loadable kernel module for the<br>
parallel port low level driver which could then have its port address<br>
default to 0x378 but also have a different port address passed in on the<br>
command line.  Of course this ties the solution down to Linux (in my case<br>
- I've not got a FreeBSD box so I don't know if they can support loadable<br>
kernel modules or not).  The SANE code then talks to this low level,<br>
platform dependant code using /dev/scanner or /dev/plustek.<br>
<p>
Tatty bye,<br>
<p>
Jim'll<br>
<p>
#!/usr/bin/perl -- -Whois++-client-in-6-lines-of-Perl -Beat-that-Z39.50! <br>
use IO::Socket;sub w{$f=shift;$a{$f}=1;($h,$p,$q)=split("/",$f);$s=<br>
IO::Socket::INET-&gt;new(PeerAddr=&gt;"$h:$p")||return;print $s "$q\r\n";while(&lt;$s&gt;)<br>
{next if(/^%/);if(/^# SERVER-TO-ASK/){while(&lt;$s&gt;){$x=$1 if/Name: (.*)\r\n$/;$y<br>
=$1 if/Port: (.*)\r\n$/;$f="$x/$y/$q";@j=(@j,$f)if(/^# END/&amp;&amp;!$a{$f})}}else{<br>
print}}close($s)}@j=shift;while(@j){w(pop(@j))}# whois++.pl host/port/query<br>
<p>
<p>
<pre>
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