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oerdgie

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Joined: 22 Nov 2007
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Location: Germany

PostPosted: Tue Nov 16, 2010 11:59 pm
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Hi,

... is it possible to show all active TSO user with REXX ?

Thanks in advance
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ofer71

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Joined: 27 Dec 2005
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PostPosted: Wed Nov 17, 2010 12:23 am
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Try this:
Code:
/* REXX */

O = 0

SAY 'Currently active users:'
SAY '-----------------------'


 CVT=PTR(16)                            /* GET CVT                    */
 ASVT=PTR(CVT+556)+512                  /* GET ASVT                   */
 ASVTMAXU=PTR(ASVT+4)                   /* GET MAX ASVT ENTRIES       */
 DO A = 0 TO ASVTMAXU - 1
   ASCB=STG(ASVT+16+A*4,4)              /* GET PTR TO ASCB (SKIP
                                           MASTER)                    */
   IF BITAND(ASCB,'80000000'X) = '00000000'X THEN /* IF IN USE        */
     DO
       ASCB=C2D(ASCB)                   /* GET ASCB ADDRESS           */
       CSCB=PTR(ASCB+56)                /* GET CSCB ADDRESS           */
       CHTRKID=STG(CSCB+28,1)           /* CHECK ADDR SPACE TYPE      */
       IF CHTRKID='01'X THEN            /* IF TSO USER                */
         DO
           ASCBJBNS=PTR(ASCB+176)       /* GET ASCBJBNS               */
           ASCBSRBT=PTR(ASCB+200)       /* GET ASCBEATT               */
           O = O + 1
           SAY RIGHT(O,2,'0') ASCBSRBT,
               STG(ASCBJBNS,8)          /* WE IS SOME HAPPY CAMPER!   */
         END
     END
 END
 EXIT

 /*-------------------------------------------------------------------*/
 PTR:  RETURN C2D(STORAGE(D2X(ARG(1)),4))     /* RETURN A POINTER     */
 /*-------------------------------------------------------------------*/
 STG:  RETURN STORAGE(D2X(ARG(1)),ARG(2))     /* RETURN STORAGE       */
 /*-------------------------------------------------------------------*/
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daveporcelan

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Joined: 01 Dec 2006
Posts: 747
Location: Pennsylvania

PostPosted: Wed Nov 17, 2010 1:01 am
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Try in SDSF (if you have it), on the command line:

DA OTSU
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Akatsukami

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Joined: 03 Oct 2009
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PostPosted: Wed Nov 17, 2010 1:09 am
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daveporcelan wrote:
DA OTSU

Every time I see that, I can't help but mistake it for dai otaku icon_lol.gif
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daveporcelan

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PostPosted: Wed Nov 17, 2010 1:11 am
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I did not notice he wanted it with rexx. My error.
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ofer71

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Joined: 27 Dec 2005
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PostPosted: Wed Nov 17, 2010 1:29 am
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You mau also invoke SDSF from within REXX... icon_lol.gif

O.
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oerdgie

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Joined: 22 Nov 2007
Posts: 61
Location: Germany

PostPosted: Wed Nov 17, 2010 1:15 pm
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Hi all,

the rexx is exactly what I need, many thanks ! icon_smile.gif
Where can I get more information about the MVS control blocks to understand rexx ?
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ofer71

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PostPosted: Wed Nov 17, 2010 1:25 pm
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As always, it's all in the fine manual.

O.
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PeterHolland

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Joined: 27 Oct 2009
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Location: Netherlands, Amstelveen

PostPosted: Wed Nov 17, 2010 1:28 pm
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MVS Data Areas Volume 1
MVS Data Areas Volume 2
MVS Data Areas Volume 3
MVS Data Areas Volume 4
MVS Data Areas Volume 5
MVS Data Areas Volume 6

Oops Ofer, you took already care of that one.
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oerdgie

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Joined: 22 Nov 2007
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PostPosted: Wed Nov 17, 2010 7:40 pm
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Thanks a lot ! icon_biggrin.gif
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B.Fischer-Bossert

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Joined: 06 Nov 2014
Posts: 8
Location: Germany

PostPosted: Mon Nov 10, 2014 8:30 pm
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Thank you for your program. It's working fine but on one one of our systems there is displayed one very special user:

...
09 0 RACFCO6
10 0 OPR0037
11 0 : :::
12 0 PRD0322
13 0 PRD5117
...

Does anyone have an idea what this user " : :::" may be?
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steve-myers

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Joined: 30 Nov 2013
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PostPosted: Tue Nov 11, 2014 1:54 am
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I think a better source for the userid would be at CSCB+8 (CHKEY) rather than ASCBJBNS. I have Assembler code that does more or less the same thing and that's where I get the userid.
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B.Fischer-Bossert

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Joined: 06 Nov 2014
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PostPosted: Tue Nov 11, 2014 3:46 pm
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Meaning "CHKEY=PTR(ASCB+64)"? I am sorry but this gets me a lot of colons and blanks for all users. Some get a "0" or a double quote, too.
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B.Fischer-Bossert

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PostPosted: Tue Nov 11, 2014 4:36 pm
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Sorry, found it. It has to be "CHKEY=STG(CSCB+8,8)". This day the special user is not there so I cannot say what its CHKEY may be.
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B.Fischer-Bossert

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PostPosted: Tue Nov 11, 2014 5:10 pm
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What I found, too, is the field containing the logon procedure "CHCLS=STG(CSCB+16,8)". But now I am searching for what is named in "DA OTSU" as "ProcStep" and the VTAM Session Id. Does someone know where to find them? It seems to me that both fields are not located in the CSCB.
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B.Fischer-Bossert

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PostPosted: Tue Nov 11, 2014 5:33 pm
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In another system the special user now shows twice. But the CHKEY and CHCLS fields are empty in both cases. What's that, a TSO session cancelled?
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steve-myers

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PostPosted: Tue Nov 11, 2014 6:49 pm
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This is the Assembler code. The test for a valid ASCB pointer is a little different than the Rexx code, and it validates ASCBCSCB, which the Rexx code does not.
Code:
* OBTAIN THE TSO USERS
         L     2,CVTASVT-CVTMAP(,10) LOAD ADDR OF THE ASVT
         L     3,ASVTMAXU-ASVT(,2) LOAD NUMBER OF ASCB ENTRIES
         LA    2,ASVTENTY-ASVT(,2) LOAD ADDR OF THE FIRST ASCB POINTER
FINDTSOU ICM   4,B'1111',0(2)      LOAD AN ASCB ADDRESS
         BNP   SKIPASCB            BR IF THERE IS AN ADDRESS
         ICM   5,B'1111',ASCBCSCB-ASCB(4) LOAD A CSCB ADDRESS
         BZ    SKIPASCB            BR IF NO CSCB
         CLI   CHTRKID-CHAIN(5),CHTSID  TEST IF THIS IS A TSO USER
         BNE   SKIPASCB            BR IF NOT
         ...
SKIPASCB LA    2,4(,2)             COMPUTE ADDR OF THE NEXT ASCB ADDR
         BCT   3,FINDTSOU          GO CHECK IT
The comment on the BNP SKIPASCB instruction is incorrect.
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Pedro

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Joined: 01 Sep 2006
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Location: Silicon Valley

PostPosted: Tue Nov 11, 2014 10:18 pm
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Quote:
The comment on the BNP SKIPASCB instruction is incorrect.

It is odd that you knew it was incorrect but did not fix it while posting.
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steve-myers

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PostPosted: Tue Nov 11, 2014 11:48 pm
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Pedro - the program is a little over a year old; it looks like the last time it was touched was August last year. I probably run the code at least once a day.

I only noticed the bad comment after I extracted the section of the code in the post and after I sent the post. There are just a few lines of code in the missing section that are not of interest or value here.
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B.Fischer-Bossert

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Joined: 06 Nov 2014
Posts: 8
Location: Germany

PostPosted: Wed Nov 12, 2014 8:22 pm
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Thank you for these assembler lines. I tried to see what you meant with:
Code:
SAY RIGHT(D2X(CSCB-ASCB),8,'0')
but I do not get a null pointer for my special user(s).

But:
B.Fischer-Bossert wrote:
What I found, too, is the field containing the logon procedure "CHCLS=STG(CSCB+16,8)". But now I am searching for what is named in "DA OTSU" as "ProcStep" and the VTAM Session Id. Does someone know where to find them? It seems to me that both fields are not located in the CSCB.
Has anyone a solution for this?
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Terry Heinze

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Joined: 14 Jul 2008
Posts: 1249
Location: Richfield, MN, USA

PostPosted: Wed Nov 12, 2014 8:55 pm
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Don't know where you can find them, but you can get descriptions of the fields from: From a DA OTSU panel hit F1:
Code:
HELP                 HELP: Display Active Users Panel
COMMAND INPUT ===>

        Select a topic by number, or press Enter to view them in sequence.

         1 - Introduction to the DA panel
         2 - Syntax of the DA command
         3 - Action characters: display output, cancel jobs, etc.
         4 - Fields on the DA panel
         5 - Overtyping fields to change their values
         6 - Commands: limit jobs displayed, search, etc.

        These topics are displayed only if selected:

        97 - What's new
        98 - Search and navigate the help
        99 - Messages



F1 = Help             F10 = Previous          Enter = Forward
F3 = Exit              F7 = Up                TOC = Menu

Option 4 will tell you.
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B.Fischer-Bossert

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Joined: 06 Nov 2014
Posts: 8
Location: Germany

PostPosted: Thu Nov 13, 2014 5:03 pm
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Thank you, but that "ProcStep" means the session's terminal ID on TSO sessions is nothing new to me.
I want to get the information what I can find only on this VTAM command (TATOG072 is listed as "ProcStep"):
and
D NET,SESSIONS,LIST=ALL
IST097I DISPLAY ACCEPTED
IST350I DISPLAY TYPE = SESSIONS 704
IST873I PLU SLU SID STATUS
IST874I DEVISAFF.NDMT DEVISAFF.NDMTI001 D17F2A912103DAA9 ACTIV
IST874I DEVISAFF.TSOT01 DEVISAFF.
TATOG072 D17F2A912103DAA6 ACTIV
...
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steve-myers

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Joined: 30 Nov 2013
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PostPosted: Thu Nov 13, 2014 5:54 pm
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The VTAM session ID is in the "Terminal Status Block" (TSB). It won't do the Rexx user much good; the TSB is in protected storage.

In Assembler code, when you see something like

ICM 5,B'1111',ASCBCSCB-ASCB(4)

it's equivalent to

USING ASCB,4
ICM 5,B '1111',ASCBCSCB
DROP 4

Many Assembler programmers prefer one line rather than the USING ... DROP sequence
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B.Fischer-Bossert

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PostPosted: Thu Nov 13, 2014 6:47 pm
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Thank you, it's more than 20 years that I was involved in assembler coding ... and I forgot some details.
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