Hi, On Sat, Mar 24, 2007 at 06:00:24PM +0800, Wei Shen wrote:
> 2) Let the root fs server judge which server port to return on a > specific name qurry. > 3) Modify hurd_file_name_lookup function in the C lib. If necessary, > replace the default sever name to the name of an overiding server > before qurring the root fs. Note that both of these approaches are really specific single-purpose implementations of local namespaces. (The former server-side, the latter client-side.) I'm not saying this is bad or anything -- just an interesting observation. For comparision, did you evaluate the straight-forward approach to check environment variables in libc *before* the name lookup? I.e. instead of diverting the name lookup of the default location, first check whether a different location is requested, and lookup this one instead? While this would require adoptions in libc for every server individually, the changes should be rather small and obvious, so I guess it might still be an interesting alternative to the more generic but much more complicated namespace approach... This would also avoid any possible performance implications, as the path for normal filesystem lookups wouldn't be altered. What do you think? Note that the exec server needs special handling, because it's not invoked from the application process directly, but from the filesystem server on behalf of the application. There is no way to override it per-application directly (you could only override *all* execs on a specific filesystem); thus the forwarding done by the default exec server instead. For most other servers, such special handling shouldn't be necessary, though. -antrik- _______________________________________________ Bug-hurd mailing list Bug-hurd@gnu.org http://lists.gnu.org/mailman/listinfo/bug-hurd
