Currently, grub2 support gziped file with the gzio module. To open a gziped file, you have to use a special function grub_gzfile_open, I think it could be better if grub_file_open could handle compressed file transparently.
The implementation is actually quite simple. We define a file system filter interface, modules can use it to register its filter. Then, as the last step of opening a file, we can the filters. If a filter recognized the file format, it will create a new file object to represent the file. If none of the filter want to handle this file, the orginal file object is used. We can add a new function grub_file_rawopen, which will always skip the filters. We can also use variable to control behavior, for example, if nocomp=1, no filter is called. The advantage of this scheme is that it's extensible. For example. if we want to support bzip2 format, we just need to add a new decompression filter. -- Bean _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
