sane-project-website/old-archive/1997-02/0018.html

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<title>sane-devel: Re: Microtek Sane Backend</title>
<h1>Re: Microtek Sane Backend</h1>
<b>David Mosberger-Tang</b> (<a href="mailto:davidm@azstarnet.com"><i>davidm@azstarnet.com</i></a>)<br>
<i>Tue, 18 Mar 1997 22:08:43 -0700</i>
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<i>&gt;&gt;&gt;&gt;&gt; On Tue, 18 Mar 1997 21:09:45 -0600 (CST), Nem W Schlecht &lt;<a href="mailto:nem@abattoir.cc.ndsu.nodak.edu">nem@abattoir.cc.ndsu.nodak.edu</a>&gt; said:</i><br>
<p>
  Nem&gt;   Just to let everybody on the list know.. I've gotten Jan S.'s<br>
  Nem&gt; mtekscan command line program working and will soon start<br>
  Nem&gt; working on a SANE backend.  I've already started and am half<br>
  Nem&gt; done with a port of the scsi stuff to my machine.  One problem,<br>
  Nem&gt; though.  It appears that the Linux stuff is pretty low-level.<br>
  Nem&gt; My stuff is actually pretty similar, but with one major<br>
  Nem&gt; difference.  There is a structure that is used for SCSI<br>
  Nem&gt; communications, but it requires setting either a READ or WRITE<br>
  Nem&gt; flag.<br>
<p>
I just added generic SCSI support for HP-UX today (completely untested<br>
though).  I'm guessing it is similar to what SGI uses.  Take a look at<br>
what's below and see how close that is.<br>
<p>
	--david<br>
<pre>
--
SANE_Status
sanei_scsi_cmd (int fd, const void * src, size_t src_size,
		void * dst, size_t * dst_size)
{
  struct sctl_io hdr;
<p>
  memset (&amp;hdr, 0, sizeof (hdr));
  memcpy (hdr.cdb, src, src_size);
  hdr.flags = (dst_size &gt; 0) ? SCTL_READ : 0;
  hdr.cdb_length = src_size;
  hdr.data = dst;
  hdr.data_length = *dst_size;
  hdr.max_msecs = 60000;	/* 1 minute timeout */
  if (ioctl (fd, SIOC_IO, &amp;hdr) &lt; 0)
    {
      DBG(1, "sanei_scsi_cmd: ioctl(SIOC_IO) failed: %s\n",
	  strerror (errno));
      return SANE_STATUS_IO_ERROR;
    }
  if (hdr.cdb_status)
    DBG(1, "sanei_scsi_cmd: SCSI completed with cdb_status=%d\n",
	hdr.cdb_status);
  *dst_size = hdr.data_xfer;
  return SANE_STATUS_GOOD;
}
<p>
<pre>
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