, uintptr(rgid), uintptr(egid), 0)  if e0 != 0 {   err = errnoErr(e0)  }  return }  // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT  func Setresgid(rgid int, egid int, sgid int) (err error) {  _, _, e0 := RawSyscall(SYS_SETRESGID