cd0fe5c165
It seems that blkid_do_probe() is too high-level solution for some
mkfs programs (for example ext4 mkfs supports "undo" so all write
operations has to be implemented by filesystem specific functions).
The new function blkid_probe_step_back() resets internal libblkid
buffers and move probing stuff one step back. It means that the
previously used probing function will be called again in the next
blkid_do_probe() call. This allows to modify on-disk data and check
for backup superblocks or alternative magic strings. Something like:
while (blkid_do_probe(pr) == 0) {
... get SBMAGIC_OFFSET and SBMAGIC len ...
... use your private seek & write() ...
blkid_probe_step_back(pr);
}
References: https://bugzilla.redhat.com/show_bug.cgi?id=902512
Signed-off-by: Karel Zak <kzak@redhat.com>
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| docs | ||
| samples | ||
| src | ||
| COPYING | ||
| Makemodule.am | ||
| blkid.pc.in | ||
| libblkid.3 | ||