sane-project-website/old-archive/1999-08/0265.html

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<title>sane-devel: Re: net problem</title>
<h1>Re: net problem</h1>
<b>Andreas Beck</b> (<a href="mailto:becka@rz.uni-duesseldorf.de"><i>becka@rz.uni-duesseldorf.de</i></a>)<br>
<i>Sun, 22 Aug 1999 14:52:07 +0200</i>
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<i>&gt; Added</i><br>
<i>&gt;   sane   6566/tcp # network scanner daemon</i><br>
<i>&gt; to /etc/services</i><br>
Correct.<br>
<p>
<i>&gt;   sane stream tcp nowait root /usr/local/sbin/saned saned</i><br>
<i>&gt; to /etc/inetd.conf</i><br>
<p>
The root is not so nice, but o.k. for testing. I myself use "nobody" and<br>
have a setgid saned for minimum risk, but for a first test, root should be<br>
o.k.<br>
<p>
And I suppose you have sent SIGHUP to inetd, so it rereads its config -<br>
right ?<br>
<p>
<i>&gt;  localhost</i><br>
<i>&gt; to /usr/local/etc/sane.d/net.conf</i><br>
Right.<br>
<p>
<i>&gt; uncommented net in dll.conf</i><br>
Yep.<br>
<p>
<i>&gt; this is the output I get (with SANE_DEBUG_NET=128), the first</i><br>
<i>&gt; succesfull probe is from the local microtek2 backend, the other</i><br>
<i>&gt; failing probe is from the net driver. Needless to say, the net</i><br>
<p>
<i>&gt; [sanei_init_debug]: Setting debug level of net to 128.</i><br>
<i>&gt; [net] adding backend localhost</i><br>
<i>&gt; [net] get_devices: ignoring rpc-returned status Unknown SANE status code 168448867</i><br>
<p>
This is very weird. This sounds like the sane daemon failing very very early<br>
or not connecting at all. Try straceing both sides of the connection.<br>
The logs should give a clue on that.<br>
<p>
The daemon side might be a bit tricky, as it appears, when the connection is<br>
made, started from inetd. There are two possible ways to get around this:<br>
<p>
1. Make a small script "ssaned", that looks like<br>
#!/bin/bash<br>
exec strace saned 2&gt;/tmp/logfile<br>
<p>
2. use "strace -p [pid_of_inetd] -f" to attach to the inetd, and "-f"ollow<br>
when it forks off the saned.<br>
<p>
CU, Andy<br>
<p>
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-- 
= Andreas Beck                    |  Email :  &lt;<a href="mailto:andreas.beck@ggi-project.org">andreas.beck@ggi-project.org</a>&gt; =
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