[haiku-development] Re: Package management - folder hierarchy
- From: Oliver Tappe <zooey@xxxxxxxxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Tue, 11 Jan 2011 16:29:20 +0100
On 2011-01-11 at 16:03:11 [+0100], François Revol <revol@xxxxxxx> wrote:
> > However, since a mounted package-fs tree is immutable, we need to do
> > something in order to make it possible to write settings and data files. I
> > can see two possibilities to do so, one being to implement some kind of
> > union-fs which would be mounted on top of a package-fs tree and which
> > would
> > copy-up all files that are opened for writing. The second approach is to
> > restructure the filesystem tree to facilitate mounting of package-fs while
> > still supporting writable settings and data files.
> > We do not have a union-fs implementation currently (and during my research
> > I've read educated comments about why those are surprisingly hard to get
> > "right"), so I started looking into the restructuring approach.
>
> Just a quickie, as I don't feel like reading the whole yet...
>
> Are you meaning to let applications write to their app folder ?
If by app folder you mean the package/bundle they live in: no. Neither the
package file nor the mounted package tree is meant to be written to (the
latter doesn't support writing at all).
> This should be forbidden anyway, and is not supposed to happen with a
> multiuser setup.
>
> Also, how does it scale with respect to queries ?
Dunno, since support for queries isn't implemented yet in package-fs.
cheers,
Oliver
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