group IDs. Subsequently, Linux 2.4 added setgid32 () supporting 32-bit IDs. The glibc setgid () wrappergroup IDs. Subsequently, Linux 2.4 added setgid32 () supporting 32-bit IDs. The glibc setgid () wrappersetfsuid32 (2) 2.4 setgid (2) 1.0 setgid32 (2) 2.4 setgroups (2) 1.0 setgroups32