script execution with -E after slice finished

Hi,

I'm trying to do the following:

Backup several slices to DVD-RAM discs, asking the user to change disks
each time a slice (DVD-RAM) is full.
However I don't want to prompt the user via the terminal, but rather
send out an email. Once notified the user
would change DVD-RAM discs, and confirm the "disk-change" via email or a
web-interface or whatever. The  catalogue-slice goes to harddisk by the way.

Now I've choosen DAR, because it's a really nice backup-backend, and I
saw the options -p and -E, and thought this is exactly what I need.
Unfortunately not quite, as it seems.

-p is only capable of prompting the user via command-line interface.

remains -E, this actually works with some drawback. The script provided
to this parameter is executed _after_ a slice is finished and there
seems to be no way to tell the script, wether the slice finished because
it's full (demanding another DVD-RAM disc) or wether is just finished
because there is no more data to be written. I checked "%c" option, but
always passed context "operation" to the -E-script. So I end up in a
situation, where my -E-script is called after every slice, which then
prompts me for a disc-change (currently in my testing-setup via email)
even after the "last" slice, which actually doenst need any further
disc, but just needs to write the catalogue-slice to harddisk.

Too bad the current DAR-design offers 2 options to handle multi-slice
DARs, but none (fully) works in my situation.

Any ideas ?

Thanks in advance,
  Clemens Ender



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