Request assistance in finding "Write to CD" context menu item

[Sean McNeil]

On Sat, 2004-12-04 at 14:53 -0500, Joe Marcus Clarke wrote:
> > When I click on the file it says that the filename indicates it is a
> > "raw CD image" but the contents indicate "application/x-arc".  So it is
> > a mime-type issue.  The burner code only allows for
> > "application/x-iso-image" and "application/x-cd-image".  I can actually
> > open it as an archive  via. 'Open with "Archive Manager"' so it would be
> > great to keep that functioning.  I guess when I select the item it digs
> > into the contents and then changes the mime-type to "application/x-arc"
> > where it ends up removing the burn option.
> > 
> > So now the question is where should I look for mime-type lookup so I can
> > determine why it isn't coming out as "application/x-iso-image"?  This
> > looks like pretty complicated code and I got stuck tracking it down
> > through eel2 where it looks like it was only looking at the uri part
> > before the ":".  Must have got lost :(
> 
> Most likely, you need to promote the x-iso-image type ahead of the other
> type in the MIME database in either /usr/X11R6/share/mime
> or /usr/local/share/mime.

Looking at /usr/local/share/mime/packages/freedesktop.org.xml I think
there is something wrong with mime-type determination on amd64.  x-arc
has the following:

  <mime-type type="application/x-arc">
    <magic priority="50">
      <match value="0x0000081a" type="little32" offset="0" mask="0x8080ffff"/>
      <match value="0x0000091a" type="little32" offset="0" mask="0x8080ffff"/>
      <match value="0x0000021a" type="little32" offset="0" mask="0x8080ffff"/>
      <match value="0x0000031a" type="little32" offset="0" mask="0x8080ffff"/>
      <match value="0x0000041a" type="little32" offset="0" mask="0x8080ffff"/>
      <match value="0x0000061a" type="little32" offset="0" mask="0x8080ffff"/>
    </magic>
  </mime-type>

but when I look at any of the *.iso files I have the first umpteen bytes
are zero.  None of the above should have matched.

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