A/UX® Programmer's Reference

select(2N) select(2N)
NAME
select - synchronous I/O multiplexing
SYNOPSIS
#include
int select (nfds, readfds, writefds, execptfds, timeout)
int nfds, *readfds, *writefds, *execptfdsi
struct timeval * timeout i
DESCRIPTION
select examines the I/O descriptors specified by the bit masks
readfds, writefds, and execptfds to see if they are ready for reading,
writing, or have an exceptional condition pending, respectively.
File descriptor f is represented by the bit 1 <