On 8/5/19 6:28 PM, Jack wrote:
However, I keep wondering if an overlay file system might not be of
some use here. Start with /bin, containing only what's necessary to
boot before /usr is available.
I wonder how much of what would need to be in the pre-/usr /bin
directory can be provided by busybox. (Assuming that busybox is
compiled with everything living in / (root).
Once /usr is mounted, overlay mount /usr/bin on /bin (or would it be
the other way around?)
An overlay mount (mount -o bind /usr/bin /bin) would be an additional
mount. Which in and of itself is not a bad thing. But the sym-link
from /bin -> /usr/bin would avoid the additional mount. Admittedly, you
might need one additional (bind) mount somewhere to be able to access
the underlay while /usr is mounted.
Unless....
...
Even bigger hack.
What if the underlay (/ (root)) file system had the following structure:
/bin -> /usr/bin
/usr/bin -> /.bin
That would mean that the pre-/usr /bin contents would still be
accessible via /.bin even after /usr is mounted. And /bin would still
point to /usr/bin as currently being discussed with /usr merge.
--
Grant. . . .
unix || die
