What is the best way to capture an ISO image from a CD-ROM. Under Linux it
is as simple as the equivalent of cat /dev/cd0a > image. Under NetBSD
(i386 and arm32), this just keeps going until it fills up the whole disc!

I guess I could read the size by looking at the fictitious disklabel od
the CD-ROM and then setting parameters to dd appropriately. Is this the
best way?

-- 
Stephen Borrill