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Program Example33;
{ Program to demonstrate the Select function. }
Uses oldlinux;
Var FDS : FDSet;
begin
FD_Zero (FDS);
FD_Set (0,FDS);
Writeln ('Press the <ENTER> to continue the program.');
{ Wait until File descriptor 0 (=Input) changes }
Select (1,@FDS,nil,nil,nil);
{ Get rid of <ENTER> in buffer }
readln;
Writeln ('Press <ENTER> key in less than 2 seconds...');
FD_Zero (FDS);
FD_Set (0,FDS);
if Select (1,@FDS,nil,nil,2000)>0 then
Writeln ('Thank you !')
{ FD_ISSET(0,FDS) would be true here. }
else
Writeln ('Too late !');
end.
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