Joerg Sonnenberger wrote:
> It seems like NetBSD's chmod ignores the mask as it is invalid (u is not
> a valid mode) and the DragonFly one I tried with ignored the invalid
> letters and ended up using =rX pr something like that. Weired.

"u" is a valid mode. For example, you can say "chmod g=u". Maybe you 
should really read 
http://www.opengroup.org/onlinepubs/000095399/utilities/chmod.html ;)

Roland