úÎ_ï Safe-Inferred A timeout of  tells  select(2) to never time out, while   s us sets the timeout parameters to s seconds and us  microseconds. None# readFds writeFds exceptFds timeout calls the   select(2)' function with the file descriptors in readFds as the 7 FD set to watch for read readiness, and similarly for writeFds  and  exceptFds, with timeout$ specifying the timeout. The return  value is that of the call.   select-0.3System.Posix.IO.Select.TypesSystem.Posix.IO.SelectTimeoutTimeNever MicrosecondsSecondsselectc_select_wrapper timeoutToC