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I've been grumbling about under-efficient calls in SAMR, and finally got around to fixing some of them. We now call sys_getgroups() (which in turn calls initgroups(), until glibc 3.4 is released) to figure out a user's group membership. This is far, far more efficient than scanning all the groups looking for a match, and is still the 'posix way', just using an effiecient call. The seperate issue of 'who is in this group' remains, but this one has been biting some people. I need to talk to VL about how best to exersise nasty corner cases, but my initial tests hold strong. (The code is also much simpiler than before, which has to count for something :-) Andrew Bartlett