[Info-vax] Still no DIR/SORT_BY_TIME

Johnny Billquist bqt at softjar.se
Mon Aug 17 13:21:51 EDT 2015


On 2015-08-17 16:40, Simon Clubley wrote:
> On 2015-08-17, Johnny Billquist <bqt at softjar.se> wrote:
>> On 2015-08-17 14:50, Simon Clubley wrote:
>>>
>>> With RSTS/E, when opening a file, you could specify various options
>>> using a mode field which was a bitfield encoded integer. Opening a file
>>> with mode 4096 allowed you to open and read a file when you normally be
>>> blocked due to an incompatible open mode from another currently running
>>> program.
>>
>> Hmm. Essentially bypassing file locking?
>>
>
> Basically, yes.
>
> I found it useful enough that after a couple of decades since I last
> used RSTS/E in production use, I still remember which value to use
> in the mode field. :-)
>
> What I can't remember however is if mode 4096 was available to
> everyone or only privileged users/programs.

Seems like it would make sense to only allowed privileged stuff to do 
such a thing.

	Johnny




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