[HECnet] Weird SUBMIT error

[Paul_Koning at Dell.com]

> On Sep 15, 2015, at 2:32 PM, Johnny Billquist <bqt at softjar.se> wrote:
> 
> On 2015-09-15 20:28, Paul_Koning at Dell.com wrote:
>> ...
>> Or RSTS/E people... where it's even neater because you can do stuff like "give me a log file" interactively -- it was created for the benefit of batch but it is part of the kernel machinery for talking to a process ("job"), so it isn't only batch.
> 
> Well, my comment was specifically about the non-need for a $JOB. In RSX, batch will be very unimpressed if you skip the $JOB.
> 
> But now you got me a bit curious. So you can essentially ask for a log file of whatever terminal that is doing something, at any point in time?

Yes:

$ open/logfile/time foo.log
$.sys/s

RSTS P10.1-L RSTS/E V10.1 status at 15-Sep-15, 02:46 PM Up: 1:08

Job    Who    Where     What    Size    State     Run-Time Pri/RB   RTS
 1     1,211  KB0      SYSTAT  17/32K   RN Lck        0.0   -8/6    ...RSX
 2     1,2    Det      PBS...  19/32K   SL            0.0   -8/6    ...RSX
 3     1,2    Det      EVTLOG  18/32K   SL            0.0   -8/6    ...RSX
$.close/log
$ type foo.log
15-Sep-15 02:46:03 PM $.sys/s

15-Sep-15 02:46:08 PM RSTS P10.1-L RSTS/E V10.1 status at 15-Sep-15, 02:46 PM Up
: 1:08

15-Sep-15 02:46:08 PM Job    Who    Where     What    Size    State     Run-Time Pri/RB   RTS
15-Sep-15 02:46:08 PM  1     1,211  KB0      SYSTAT  17/32K   RN Lck        0.0   -8/6    ...RSX
15-Sep-15 02:46:08 PM  2     1,2    Det      PBS...  19/32K   SL            0.0   -8/6    ...RSX
15-Sep-15 02:46:08 PM  3     1,2    Det      EVTLOG  18/32K   SL            0.0   -8/6    ...RSX
15-Sep-15 02:46:08 PM $.close/log

The way this works is that the log file (and current command file level) are owned and handled by the kernel.  The indirect command processor just opens the files and hands them to the kernel.  If a command file is open, the kernel directs terminal reads to that file.  If a log file is open, it sends terminal output to the log.  Also, if requested, it prefixes a timestamp.  These are called "permanent files" because they aren't closed at program exit the way regular file descriptors are.

So most of the work of batch jobs (and command files) is in the kernel.  That's about the only way to make it transparent, since RSTS doesn't have supervisor mode in which to hide DCL concurrent with the running process, as VMS does.

	paul