freepascal.compiler/docs/printex/printex.pp

program testprn;

uses printer;

var i : integer;
    f : text;
    
begin
  writeln ('Test of printer unit');
  writeln ('Writing to lst...');
  for i:=1 to 80 do writeln (lst,'This is line ',i,'.'#13);
  close (lst);
  writeln ('Done.');
  {$ifdef linux}
  writeln ('Writing to pipe...'); 
  assignlst (f,'|/usr/bin/lpr -m');
  rewrite (f);
  for i:=1 to 80 do writeln (f,'This is line ',i,'.'#13);
  close (f);
  writeln ('Done.')
  {$endif}
end.