Detect the case where there are no A/B partitions and print an error
about it rather than erroneously continuing execution.
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
While postmarketOS makes use of a kernel cmdline argument, this isn't
the case for all distros. Furthermore, this argument isn't present in
those added automatically by the Android bootloader.
In order to still be able to use `qbootctl` on other distros, this
change ensures we use the currently active slot as the current slot when
the cmdline argument is missing. This ensure `qbootctl -m` picks up the
correct slot more often than not, instead of always defaulting to `_a`.
For some usecases it is desired to still update the GPT headers even if
the UFS BSG device is missing. Add a new flag which implements this
behaviour.
It isn't made the default because on some platforms this could result in
an unbootable device, there it's preferable to defer to the user by just
bailing out if the UFS BSG device is unavailable.
Signed-off-by: Caleb Connolly <caleb@connolly.tech>
The only C++ was for handling discovering and iterating over the
partitions PER block device, this was implemented in a really
overcomplicated way.
Simplify things, port everything over to c11 and drop the libstdc++
requirement entirely.
