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<!-- received="Tue Apr 27 15:13:05 1999 PDT" -->
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<!-- sent="Wed, 28 Apr 1999 00:16:39 +0200" -->
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<!-- name="Petter Reinholdtsen" -->
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<!-- email="pere@hungry.com" -->
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<!-- subject="Re: May sane_init fail?" -->
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<!-- id="199904272216.AAA15552@lee.Cc.Uit.No" -->
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<!-- inreplyto="May sane_init fail?" -->
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<title>sane-devel: Re: May sane_init fail?</title>
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<h1>Re: May sane_init fail?</h1>
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<b>Petter Reinholdtsen</b> (<a href="mailto:pere@hungry.com"><i>pere@hungry.com</i></a>)<br>
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<i>Wed, 28 Apr 1999 00:16:39 +0200</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#391">[ date ]</a><a href="index.html#391">[ thread ]</a><a href="subject.html#391">[ subject ]</a><a href="author.html#391">[ author ]</a>
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<li> <b>Next message:</b> <a href="0392.html">Petter Reinholdtsen: "Patch: sane_init() may fail"</a>
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<li> <b>Previous message:</b> <a href="0390.html">Luca Del Signore: "Re: HEEEELP!!!!!!!!!!!"</a>
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<li> <b>Maybe in reply to:</b> <a href="0166.html">Petter Reinholdtsen: "May sane_init fail?"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0400.html">Ingo Wilken: "Re: May sane_init fail?"</a>
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<li> <b>Reply:</b> <a href="0400.html">Ingo Wilken: "Re: May sane_init fail?"</a>
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<!-- reply="end" -->
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</ul>
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<!-- body="start" -->
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[Graham Stoney]<br>
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<i>> After a quick look at the 1.01-pre4 sources, the DC210 backend can</i><br>
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<i>> also return SANE_STATUS_INVAL. There may be others...</i><br>
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<p>
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After reading dc210.c, I seriously beleave that the tests returning<br>
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SANE_STATUS_INVAL from sane_init() should be moved to sane_open().<br>
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<p>
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I beleave a backend should not connect to the device until sane_open()<br>
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is called. The DC210 backend opens the serial device, and extract<br>
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camera info in sane_init().<br>
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<p>
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Anyway. I'm now writing a patch to sane 1.0.1 with my suggested<br>
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change. I suggest three valid responses from sane_init():<br>
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<p>
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SANE_STATUS_GOOD - Success<br>
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SANE_STATUS_NO_MEM - Ran out of memory<br>
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SANE_STATUS_UNSUPPORTED - Not supported on this machines current<br>
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configuration<br>
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<p>
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Would there be need for more return values?<br>
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<pre>
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--
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##> Petter Reinholdtsen <## | <a href="mailto:pere@td.org.uit.no">pere@td.org.uit.no</a>
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O- <SCRIPT Language="Javascript">window.close()</SCRIPT>
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<a href="http://www.hungry.com/~pere/">http://www.hungry.com/~pere/</a> | Go Mozilla, go! Go!
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<p>
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<pre>
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--
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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0392.html">Petter Reinholdtsen: "Patch: sane_init() may fail"</a>
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<li> <b>Previous message:</b> <a href="0390.html">Luca Del Signore: "Re: HEEEELP!!!!!!!!!!!"</a>
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<li> <b>Maybe in reply to:</b> <a href="0166.html">Petter Reinholdtsen: "May sane_init fail?"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0400.html">Ingo Wilken: "Re: May sane_init fail?"</a>
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<li> <b>Reply:</b> <a href="0400.html">Ingo Wilken: "Re: May sane_init fail?"</a>
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<!-- reply="end" -->
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</ul>
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