[Overview][Types][Procedures and functions][Variables] Reference for unit 'unixutil' (#rtl)

GetFS

Return file selector

Declaration

Source position: line 0

function GetFS(

  var T: Text

):LongInt;

function GetFS(

  var F:

):LongInt;

Description

GetFSreturns the file selector that the kernel provided for your file. In principle you don' need this file selector. Only for some calls it is needed, such as the #rtl.baseunix.fpSelectcall or so.

Errors

In case the file was not opened, then -1 is returned.

See also

#rtl.baseunix.fpSelect

  

Wait for events on file descriptors

Example

Program Example33;

{ Program to demonstrate the SelectText function. }

Uses Unix;

Var tv : TimeVal;

begin
  Writeln ('Press the <ENTER> to continue the program.');
  { Wait until File descriptor 0 (=Input) changes }
  SelectText (Input,nil);
  { Get rid of <ENTER> in buffer }
  readln;
  Writeln ('Press <ENTER> key in less than 2 seconds...');
  tv.tv_sec:=2;
  tv.tv_sec:=0;
  if SelectText (Input,@tv)>0 then
    Writeln ('Thank you !')
  else
    Writeln ('Too late !');
end.