--- /dev/null
+from typing import List, NamedTuple, Optional\r
+\r
+struct_group = NamedTuple("struct_group", [("gr_name", str),\r
+ ("gr_passwd", Optional[str]),\r
+ ("gr_gid", int),\r
+ ("gr_mem", List[str])])\r
+\r
+def getgrall() -> List[struct_group]: ...\r
+def getgrgid(gid: int) -> struct_group: ...\r
+def getgrnam(name: str) -> struct_group: ...\r