[TUHS] Interesting post about Microsoft and UNIX

[Warner Losh]

On Sat, Dec 7, 2024, 9:28 AM Arrigo Triulzi via TUHS <tuhs at tuhs.org> wrote:

> On 7 Dec 2024, at 17:12, Arrigo Triulzi via TUHS <tuhs at tuhs.org> wrote:
> > Well, as the Unix filesystem was connected to MS-DOS as a “network
> drive” it had rudimentary opportunistic locking via the SMB protocol which
> I am not entirely sure actually translated to anything on the Unix side.
> There was often data corruption when writing from multiple MS-DOS sessions
> to the same file so the customer, who was particularly keen on the reading
> from multiple terminals more than the writing, simply decided that only one
> person could write into the inventory at one time. “Sneaker lock”?
>
> Correction: it cannot possibly be SMB, that came later - I haven’t the
> faintest idea of what the network protocol was called in MS-DOS, I just
> remember you had to load something in CONFIG.SYS on MS-DOS 4 or higher to
> make it work.
>

Yes. There were namespace hooks of a sort that one could hook into via a
TSR... I wrote something for a DOS 3.1 system that had a few initial
UNDOCUMENTED interfaces. I couldn't ever get anything to work beyond the
init...

Warner

>
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