[poky] Postinstallation script for target throw warnings

[Alexander Kanavin]

On 01/12/2018 03:45 AM, Robert Yang wrote:
>>> But it would be better if you can make it work during do_rootfs rather
>>> than firstboot.
>>
>> This is not correct. If you do this, then the postinst will be 
>> executed once, during image creation, and Actions will never be taken.
> 
> Sorry, I think that the 'Action' will be executed when first boot ?

Before that happens, the script needs to be deferred to first boot by 
issuing 'exit 1'. There's special magic to extract it from rpm and place 
in a separate execute-on-first-boot location in the target filesystem 
that gets triggered by 'exit 1'.

Alex