Backing up multisession Blue Book CDs

[Michael Hackett <at217@chebucto.ns.ca>]

I've looked high and low and can't seem to find any info on this, so I
hope someone here can help.

I would like to make complete backups of some of my music CDs, but I
haven't figured out how to get images of both the ISO 9660 (Windows) and
HFS (Mac) partitions from the "Enhanced CDs" (aka CD-Extra, CD-Plus),
using Linux software.

I expect that, in most cases, most of the files are shared between the
two and I'd prefer to be able to create a data file that could be used
with mkisofs to similarly recreate the sharing between the two
partitions, but I'd settle for two completely separate images.

Can this be done, and what tools do I need?

Thanks!
-- Michael