Estimating left space on a CD...

[Andrea Giuliano]

Hi,

I'm writing a BASH script to do simple backups on a CD-RW, but I can't
find a way to know how much space is left on the medium.

A trivial solution could be mounting the medium and use "du -sk" on it,
but the disadvantage of this method is that the result would just be the
total length of the original files, while the ISO images are usually
slightly longer. The result is an underestimated value.

Any hints?

Best regards.

----
Andrea Giuliano, Ph. D.
ICCU - Istituto Centrale per il Catalogo Unico
Viale Castro Pretorio 105, Rome - ITALY
Tel. +39064989509, Fax +39064059302