#if !defined ISO && !defined ISO99 && !defined ISO11 && !defined POSIX
type time_t
type suseconds_t

type {struct timeval}
element {struct timeval} time_t tv_sec
element {struct timeval} suseconds_t tv_usec

type sigset_t

type {struct timespec}
element {struct timespec} time_t tv_sec
element {struct timespec} long tv_nsec

type fd_set
#if defined XPG3 || defined XPG4 || defined UNIX98
element fd_set long fds_bits []
#endif

macro FD_CLR
macro FD_ISSET
macro FD_SET
macro FD_ZERO

macro FD_SETSIZE

#if defined XOPEN2K || defined POSIX2008
function int pselect (int, fd_set*, fd_set*, fd_set*, const struct timespec*, const sigset_t*)
#endif
function int select (int, fd_set*, fd_set*, fd_set*, struct timeval*)

allow-header signal.h
allow-header sys/time.h
allow-header time.h
#endif