FD_SET
#define FD_SET(n, p) ((p)->__fds_bits[(n)/_NFDBITS] |= __fdset_mask(n))
#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#define FD_SET(n,s) (s) |= 1 << (n)
#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#undef FD_SET
#define FD_SET(fd, maskp) \
#define FD_SET(__n, __p) ((__p)->fds_bits[(__n)/FD_NFDBITS] |= \