On Fri, 30 Oct 2009 12:46:57 -0700 Doug Jones <dj...@frombob.to> wrote:
> [snip] > > I like this approach, just remind that as far I see the code and by > > comments of the devs, the kernel implements the bare just enough to > > read files, so I think directories are not implemented at all that's > > why all is on root directory so at least basic hierarchical > > filesystem has to be implemented before we can do this solution. > > But directories will easy the organization of pictures too > > > Good point. > > So two important questions to be answered, before we get any further > into this: > > (1) Has OpenMoko made the policy decision that filenames will be > limited to 8.3? I would prefer to keep it simple, the boot loader must run in under 7kB of internal RAM (actually it uses overlays) so adding more code here is not so easy. > > > (2) How complicated will it be to implement subdirectory support? The version of the file system supports directory access, but there is no support for "chdir" we are using this: http://elm-chan.org/fsw/ff/00index_e.html presently at version: R0.06 so all pathnames have to be absolute, I tried a couple of quick tests and I could create and read a file in the folder, but I am missing "mkdir" in forth, (just need to add the interface routine) It looks like there is a new version with "chdir" support, but I have not investigated this yet Hope this answers your questions > > > Note that only one subdirectory level is really needed to implement > what has already been suggested. > > The current implementation contains 81 files, totaling 4.2GB for the > English version. Nearly all of that is in the big wiki data files > (pedia*). The other files, the ones you get when you make install, > comprise 49 files and only 18MB, and most of that is fonts (which are > often different for different languages). > > We could adopt a brain-swap approach: After bootup, the user selects > one wiki and then the app switches to the selected subdirectory and > considers that to be the root until the next cold boot. All 81 files > for that particular wiki and language would be in that subdirectory, > including the big wiki data files and the fonts and the remaining > files (45 files, only 381KB, and this includes ALL of the > executables!) While the single app is running, it would not have to > access (or even know about) anything outside its current directory, > so no filesystem calls relating to directory navigation would be > needed within that particular kernel.elf. Only the initial wiki > selection app (we would have to write one) would have to understand > subdirectories, and only to one level deep. > > > _______________________________________________ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community