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- Program ShareVolation;
- Uses Dos,Crt;
- Var
- Dummy: Boolean;
-
- Function FileOpen(F:String):Boolean;
- Var
- Regs: Registers;
- I: Byte;
- begin
- With Regs do
- begin
- Ah := $3d;
- Al := 2;
- Ds := Seg(F);
- Dx := Ofs(F)+1;
- end;
- Intr($21,Regs);
-
- WriteLn(F,' open: ',Regs.Ax = 5);
- FileOpen := (Regs.Ax = 5);
- end; { FileOpen }
-
- begin
- Dummy := FileOpen('D:\FILSHARE.EXE'+#0);
- Dummy := FileOpen('C:\CONFIG.SYS'+#0);
- Dummy := FileOpen('C:\IO.SYS'+#0);
- Dummy := FileOpen('C:\MSDos.SYS'+#0);
- end.
-
- {
- And the funny thing was that it worked..
- (But it returns error code 6 [Invalide handle] on closed Files)..
- }