Zigbert has a utility available, a binary executable named 'close', in PET package 'close-dvd+rwtools'. This is used by Pburn to fixate DVDs, if present.
I don't know where the source code of 'close' is.
I have put both of these in the 'common' repo, will upload soon.
Comments:Posted on 31 Aug 2011, 22:56 by plinej
The close command source
The close command was an example program to fixate dvds included in an old version of dvd+rw-tools. As far as I know they never added the same capability to growisofs for whatever reason. You can get the source from the Pburn thread on page 45:
Posted on 32 Aug 2011, 8:41 by BarryK
Thanks for that. I have created a tarball named 'close-1.tar.gz' with explanation inside it how to compile -- note, the dvd+rw-tools source needs 'gcc43.patch' from T2 to compile.
The 'close' source is in my source repo: