sane-project-website/old-archive/1999-04/0123.html

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<title>sane-devel: Core dump when trying to use net backend</title>
<h1>Core dump when trying to use net backend</h1>
<b>Scott Wells</b> (<a href="mailto:swells@vignette.com"><i>swells@vignette.com</i></a>)<br>
<i>Tue, 6 Apr 1999 16:43:33 -0500</i>
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I'm trying to use the net backend to access my scanner (actually, I'm<br>
ULTIMATELY trying to use a TWAIN-SANE gateway, but baby steps first...).<br>
First, some platform specifics:<br>
<p>
RedHat 5.1 x86<br>
Kernel 2.0.34 (I have good reasons for being so far back)<br>
SANE pre1.01-4 w/Microtek2 patch<br>
Adaptec AIC-7850 SCSI host adapter (narrow)<br>
Microtek ScanMaker X6 EL<br>
<p>
I'm able to scan directly from the microtek2 backend wonderfully!  Now I'd<br>
like to scan through the net backend.  To do so, I've done the following:<br>
<p>
1. Uncommented the 'net' line in dll.conf<br>
2. Added entries for 'localhost' and '&lt;hostname&gt;' in net.conf<br>
3. Set debug level to 128 for DLL, MICROTEK2, NET, and SANEI_SCSI<br>
<p>
I execute:<br>
<p>
$ scanimage -d net:(localhost|&lt;hostname&gt;):microtek2<br>
<p>
and I get:<br>
<p>
&lt;leading info elided&gt;<br>
[dll] loading backend net<br>
[dll] dlopen()ing '/usr/local/SANE/lib/sane/libsane-net.so.1<br>
[dll] init: initializing backend 'net'<br>
[sanei_init_debug]: Setting debug level of net to 128.<br>
[net] adding backend localhost<br>
[net] adding backend &lt;hostname&gt;<br>
Segmentation fault (core dumped)<br>
<p>
I've done a *little* debugging and the seg fault occurs at some point in the<br>
net implementation of sane_get_devices().  Does anyone know what's going on?<br>
Have I left out some all-important step in my configuration?  It's worth<br>
noting that:<br>
<p>
$ telnet (localhost|&lt;hostname&gt;) sane<br>
<p>
connects fine; it's not a saned configuration issue (that I know of).<br>
<p>
Thanks in advance,<br>
Scott Wells<br>
<p>
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