pid2sid_winname_cache_t
idmap_purge_pid2sid_winname_cache(pid2sid_winname_cache_t *cache, size_t limit)
pid2sid_winname_cache_t uid2sid_winname;
pid2sid_winname_cache_t gid2sid_winname;
idmap_purge_pid2sid_winname_cache(pid2sid_winname_cache_t *cache, size_t limit);