[yocto] readonly rootfs - storing data in separate partition

[Joshua Watt]

On Mon, 2019-02-18 at 17:36 +0100, Belisko Marek wrote:
> Hi,
> I plan to use readonly rootfs option and store some custom data in
> separate partition (like hostname, wpa_supplicant.conf etc). I have
> wic file which create rootfs + then rest is for data storage. I can
> adjust various recipes to symlink to /data partition. My question is
> if there exists some mechanism how to store some pieces in non-rootfs 
> partition? I know some projects which put those extra files to deploy
> dir and then by dd create dummy storage nd put files there and
> finally create partition from that. Thanks a log for any pointers.

We do this a lot using volatiles files. The best documentation is the
core volatiles file: 
https://git.yoctoproject.org/cgit/cgit.cgi/poky/tree/meta/recipes-core/initscripts/initscripts-1.0/volatiles id="-x-evo-selection-start-marker">
> BR,
> 
> marek
> 
-- 
Joshua Watt <JPEWhacker at gmail.com>
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