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#ifndef _SYS_SELECT_H
#define _SYS_SELECT_H
typedef long int fd_mask;
#define NFDBITS (8 * sizeof(unsigned long))
#define FD_SETSIZE 1024
#define __FDSET_LONGS (FD_SETSIZE/NFDBITS)
#define __FDELT(d) ((d) / NFDBITS)
#define __FDMASK(d) (1UL << ((d) % NFDBITS))
typedef struct {
unsigned long fds_bits [__FDSET_LONGS];
} fd_set;
#define FD_SET(d, set) ((set)->fds_bits[__FDELT(d)] |= __FDMASK(d))
#define FD_CLR(d, set) ((set)->fds_bits[__FDELT(d)] &= ~__FDMASK(d))
#define FD_ISSET(d, set) (((set)->fds_bits[__FDELT(d)] & __FDMASK(d)) != 0)
#define FD_ZERO(set) \
((void) memset ((void*) (set), 0, sizeof (fd_set)))
#endif
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