, uintptr(ruid), uintptr(euid), uintptr(suid))  if e0 != 0 {   err = errnoErr(e0)  }  return }  // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT  func Setreuid(ruid int, euid int) (err error) {  _, _, e0 := RawSyscall(SYS_SETREUID