select
- int select(int , fd_set* , fd_set* , fd_set* , timeval* )
 - int select(int , fd_set* , fd_set* , fd_set* , timeval* )
 - int select(int , fd_set* , fd_set* , fd_set* , timeval* )
 - int select(int , fd_set* , fd_set* , fd_set* , timeval* )
 
 
		tango stdc posix sys time 
		functionsstructsvariables