group IDs. Subsequently, Linux 2.4 added setreuid32 () and setregid32 (), supporting 32-bit IDs. The glibcgroup IDs. Subsequently, Linux 2.4 added setreuid32 () and setregid32 (), supporting 32-bit IDs. The glibcgroup IDs. Subsequently, Linux 2.4 added setreuid32 () and setregid32 (), supporting 32-bit IDs. The glibcgroup IDs. Subsequently, Linux 2.4 added setreuid32 () and setregid32 (), supporting 32-bit IDs. The glibcsetresuid32 (2) 2.4 setreuid (2) 1.0 setreuid32 (2) 2.4 setrlimit (2) 1.0 setsid