Hi Karel,
>
> You can specify more than one magic strings for the same filesystem,
> the .magics = { } is array.
thanks for you suggestion. However this seems to me not applicable. I
tried to change the code, and what I got to me seems inconsistently:
Whit this change
1) if I do "wipefs <device>", I got the offset of the first superblock
(good enough)
2) if I do "wipefs -a <device>", I clean-up *all three* superblocks
(very good)
3) if I do "wipefs -o <offset> <device>", I clean-up only the superblock
located at <offset> (very bad)
If the user doesn't know enough btrfs, trying 1) and 3) could think that
the disk is cleaned-up. Instead the 2nd and the 3rd super-blocks still
exist.
> see for example libblkid/src/superblocks/reiserfs.c
I think that this is a different case: the reiser superblocks are
*alternative*; instead in the btrfs case, *all the three superblocks*
exist at the same time.
> Karel
Ciao
Goffredo
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