(posix-groups#initialize-groups (#(procedure #:clean #:enforce) posix-groups#initialize-groups (string fixnum) undefined))
(posix-groups#group-information (#(procedure #:clean #:enforce) posix-groups#group-information (fixnum #!optional *) *))
(posix-groups#get-groups (#(procedure #:clean) posix-groups#get-groups () list))
(posix-groups#set-groups! (#(procedure #:clean #:enforce) posix-groups#set-groups! ((list-of fixnum)) undefined))