[Info-vax] Hard links on VMS ODS5 disks

[Johnny Billquist]

On 2023-07-17 15:30, Dave Froble wrote:
> On 7/17/2023 6:55 AM, Johnny Billquist wrote:
>> On 2023-07-16 00:42, Dave Froble wrote:
>>
>>> Ok, my test was on a VAX, but I doubt that has any bearing.  Don't 
>>> have a
>>> clue. Unless you're trying to read the file while it's still open.  That
>>> doesn't work.
>>
>> Why wouldn't it work on an open file? As long as you are allowed 
>> shared reading
>> it should be just fine.
>>
>>   Johnny
>>
> 
> I'm not familiar with the TYPE utility.

Oh. You meand it more specifically in the context of that 
program/command. Ok, fair enough. I wouldn't know about TYPE limitations 
myself either.  But as a general thing about files in ODS5, you can 
certainly read them while they are open.

> I am a bit familiar with RMS, the DLM, and usage.
> 
> My guess is that the utility doesn't use any "read regardless" 
> capability.  So "allowed shared reading" may not be in use.  Just a guess.

Your guess is as good as mine on that specific question.

Under RSX, TYPE is under the hood using PIP. And PIP have a switch /SR 
for shared reading. That switch don't seem to be exposed under DCL.
But with MCR, you can certainly type a file that is open.

   Johnny