Re: Fink 10.15 & read-only root

> On Aug 19, 2019, at 06:29, John Lillibridge <[email protected]> wrote:
> 
> Thanks Scott,
> 
> I appreciate your instructions to disable SIP via ‘csrutil’, but that isn’t sufficient for 10.15 Catalina. The “system disk” is now split into a read-only root (/) and a read-write “Data” partition. So, if your system disk was “Mac HD”, there would be a read-only volume by that name and a read-write volume named “Mac HD - Data”. These appear as one in the Finder, and what appear to be writable directories at the root level (e.g. /usr/local) are tied together via a new APFS filetype called “firmlinks”. The current crop of these new links is found in /usr/share/firmlinks.
> 
> So it is more complicated than disabling SIP under 10.15. What I did find out, surprisingly, is that I could create /sw, and install Fink by first making the read-only filesystem read-write via:
> 
> sudo mount -o rw /
> 
> This was NOT supposed to continue working past the first beta, but as of 10.15b5 it still does work. After a reboot, the root filesystem is again read-only.
> 
> I look forward to continuing to work on this. My hope is that Apple will create a firmlink for /sw (they already provide /opt) so that everything will work as it did with 10.14 & earlier. There is no ability for users (even sudo/root) to make new firmlinks…
> 
> More to come!
> John L.

Unfortunately, that’s very unlikely.  Apple is indifferent about Fink.  We might need to switch to using /opt/Fink and to disallow alternate locations.
-- 
Alexander Hansen, Ph.D.
Fink User Liaison



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