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- # $Id: README.session,v 1.2 1997/02/23 15:45:50 eric Rel $
-
- This release of mkisofs has basic support completed for
- multiple sessions. At this point, it hasn't been tested thoroughly at all -
- we still need some interaction between cdwrite and mkisofs for this to work
- correctly.
-
- There are a few new options to mkisofs to allow for this.
- The first one is "-M /dev/scd0", and is used so that mkisofs can examine
- the entirety of the previous image so that it can figure out what additional
- files need to be written in the new session.
-
- There is also a temporary hack in mkisofs in the form of a '-C' option.
- The -C option takes two numbers as input, which are delimited by commas.
- For example, you could specify "-C 1000,1020", but you should never just
- make up numbers to use here. These numbers are determined from cdwrite.
-
- There are patches to cdwrite in the file cdwrite.c.diff, which add
- a new information gathering option. To use this, you specify '-m', and
- instead of actually writing any data, cdwrite dumps two numbers to stdout
- which are comma delimited. These are the same numbers that mkisofs uses
- with the -C option.
-
- Thus in practice you should in principle be able to do something like:
-
- mkisofs [other options] -C `cdwrite --device /dev/sgX --multi` \
- -M /dev/cdblkdev
-
- to tie these things together. Admittedly this is a very crude
- interface between the two programs right now, and this will be cleaned
- up later. For now, it provides the minimal functionality required to write
- multiple session discs.
-
- Note: As of the 1.10b4 release, nobody has actually tried to burn any
- discs with this. It is entirely possible that bugs exists, or that
- further tweaks will be required somewhere along the way to get things
- working correctly. The data gathering mode of cdwrite has been
- tested, and I believe it works correctly. Caveat Emptor.
-
- [Nov 4, 1996].
-
-