Add getgroupmembership(3)
NetBSD manual page for getgrouplist(3) and getgroupmembership(3)
FreeBSD manual page for getgrouplist(3)
PATCH to add getgroupmembership(3) to FreeBSD
http://osdir.com/ml/netbsd.devel.userlevel/2004-12/msg00001.html
http://lists.freebsd.org/pipermail/freebsd-current/2006-May/063548.html
http://lists.freebsd.org/pipermail/freebsd-current/2006-March/061413.html
http://lists.freebsd.org/pipermail/freebsd-current/2007-July/075131.html
PATCH Provide getgroupmembership for FreeBSD NSS
http://developer.apple.com/technotes/tn2005/tn2127.html
http://mail-index.netbsd.org/tech-userlevel/2004/12/01/0001.html
http://katherina.student.utwente.nl/~matthijs/cgi-bin/blosxom?-tags=Samba
http://www.nabble.com/force-group-to-Unix-group-in-3.0.25-to10677144.html (This link is broken)