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- {
- LARS HELLSTEN
-
- > I would like to open a few Files in READ, DENY Write mode. I can get the r
- > part (just a reset), but not the DENY Write. How can I accomplish this in
- > Turbo Pascal Without locking specific Records or parts of Files, or the who
- > File... or is that what is required?
-
- You can accomplish that by changing the FileMODE Variable. I
- don't know if that's what you're looking for, or already know this,
- but, here's a table of FileMODE values:
- Sharing Method
- Access Method Compatibility Deny Write Deny Read Deny None
- --------------------------------------------------------------
- Read Only 0 32 48 64
- Write Only 1 33 49 65
- Read/Write 2 34 50 66
- --------------------------------------------------------------
-
- So, as you can see, all you need to do is set the FileMODE to 32. Just
- put the satement "FileMode := 32;" in before you reset the File. This will
- only work With Dos' SHARE installed, or a compatible network BIOS. if you
- need a routine to detect SHARE, here's one:
- }
-
- Uses
- Dos;
-
- Function ShareInstalled : Boolean;
- Var
- Regs : Registers;
- begin
- Regs.AH := $16;
- Regs.AL := $00;
- Intr($21, Regs);
- ShareInstalled := (Regs.AL = $FF);
- end;
-
- begin
- Writeln('Share: ', ShareInstalled);
- end.