I don't know much about union file-systems, but AFAIK they are different from bind mounts. A bind mount is created by "mount -o bind /foo /bar" and causes the tree under /foo to be overlayed over /bar, with the former contents of /bar being hidden. It's like a regular mount, except that the source is not (a filesystem on) a block device, but a directory.
It does sound a bit similar to firmlinks. But firmlinks work on any kind of type of file (directories, symlinks, ...). I don't know if this bind file-system can be used across chroots, but firmlinks can. Cheers. _______________________________________________ Bug-hurd mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-hurd