Re: (expand-file-name "/..")

Marcus Harnisch writes: Doesn't Google like you? (Just teasing, you have no duty to check.) On the first page of "filesystem superroot" results there are four references to superroot that seem to make sense here. The first is the obsolete Apollo Domain/OS filesystem, the second is Cygwin (which presumably means it's embedded in the VFS, but that's just a WAG, I haven't actually looked it up), the third is Linux NILFS, and the fourth is the HAMMER2 filesystem associated with Dragonfly BSD. The latter two are concrete filesystems, and apparently use the superroot as a place to collect information about internal filesystems, specifically snapshots in the case of HAMMER2. So for these concrete filesystems, the "superroot" concept makes sense, and it isn't "turtles all the way down".[1] http://leaf.dragonflybsd.org/mailarchive/users/2012-02/msg00020.html https://www.kernel.org/doc/Documentation/filesystems/nilfs2.txt It's not clear to me that Emacsen have any business looking above root in their ordinary operations, though. I would implement expand-file-name consistently with POSIX semantics (since Emacs *doesn't* implement "superroot" for DOS_NT filesystems!), and provide a special superroot-directory function (or some such) for those who really have need. Regards, Footnotes: [1] http://evolvingthoughts.net/2011/03/turtles-all-the-way-down/ for those who haven't seen the phrase before. And for those who have, and have 30 minutes to browse, the comments are wonderful! (Some of them, anyway. ;-) _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-beta