I'm using the wodim command in bash with the -multi flag to write to a CD-RW without having to blank the disc in between writes. After writing enough sessions to the disc, I have to blank the disc to recover some of the multi-session overhead space.
How can I determine how much space is left on the disc before attempting to write more data to it?
The df command shows 0 KB available (100% capacity) for my multi-session disc regardless of how much data is actually on it.
I'm using RHEL 7, and it's important that I avoid installing additional 3rd party utilities.