Understood, I've been really impressed with his work on rofs so far. It 
makes perfect sense for an application like mine.

I modified usr_rofs.manifest.skel to include:

/etc/resolv.conf: ->/tmp/resolv.conf

...and built with fs=rofs, but it fails writing it.  So I'm definitely 
doing something wrong :)

On Thursday, February 7, 2019 at 5:07:03 AM UTC-5, Nadav Har'El wrote:
>
> This is a question for Waldek, who's the expert (and author) of the 
> readonly-filesystem stuff. But I seem to remember it is - that we always 
> mount a writeable, in-memory, file system, because many applications assume 
> they can write stuff there. If we don't do that yet, maybe we should? 
>  
> You can test this by building an image with "fs=rofs". For example,
>
> scripts/build fs=rofs image=rogue
>

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