[PATCH 09/11] mount.cc: Implement poor-man's cache

[Corinna Vinschen]

On Feb  3 12:38, Ben wrote:
> 
> 
> On 18-01-2021 12:51, Corinna Vinschen via Cygwin-patches wrote:
> > Ok, so hash_prefix reduces the path to a drive letter or the UNC path
> > prefix and hashes it.  However, what about partitions mounted to a
> > subdir of, say, drive C?  In that case the hashing goes awry, because
> > you're comparing with the hash of drive C while the path is actually
> > pointing to another partition.
> > 
> How can I mount a partition as a subdir of drive C?
> For some reason I can't:
> $ mount /cygdrive/e/Temp/dummy /cygdrive/c/Temp/dummy/dummyone
> mount: /cygdrive/c/Temp/dummy/dummyone: Invalid argument

I wasn't talking about Cygwin mount points, but rather about Windows
mount points.  Since Windows 2000 a partition can be mounted into a
directory of another partition.  Only drive C: (ignoring non-harddisks)
has to be mounted with a drive letter, all others can be mounted just as
on Unix.

But, yeah, Cygwin also supports bind mounts.  Here's an example
from my /etc/fstab.d user mount file:

  //remote/cygwin-src /cygwin nfs binary 0 0
  /cygwin/pub /home/pub nfs bind 0 0


Corinna