• Subject: Re: batch job that uses a dspf.
  • From: "Alexei Pytel" <pytel@xxxxxxxxxx>
  • Date: Fri, 20 Apr 2001 11:13:08 -0500

It does not matter whether job type is interactive or batch. What matters
is whether job uses display I/O.
All interactive jobs use it by definition, but if batch job acquires a
display and tries to do display I/O, it will immediately become an
"interactive" in a sense, with all the consequences.

    Alexei Pytel

                    "Steve Richter"                                             
                    <srichter@AutoCoder       To:     <MIDRANGE-L@midrange.com> 
                    .com>                     cc:                               
                    Sent by:                  Subject:     batch job that uses 
a dspf.             
                    04/20/2001 02:36 AM                                         
                    Please respond to                                           

On a server system, does a batch job that runs a pgm that writes to a dspf
run a full server speed, or does it run in the interactive penalty box and
cause the cpu wasting CFINT job to run?

To illustrate my question ...

The code at the end of the email will create a cmd, dspf and cl pgm. The
pgm, cmd and dspf are all named BatMenu.

The cl pgm will prompt a menu on the display and execute the selected

The cmd is used to call the cl pgm with its one parameter: This parm
contains the name of the display device to write the menu to.

The cl pgm is intended to run in a batch job.  So it will OvrDspf its dspf
to the device name passed in parm 1.
        OvrDspf  BatMenu  Dev(&Device)

To run the pgm, do the following:
    1. Get the device name of a display that has a signon screen ( not
signed on )

When I run this on my system, the job type of the job is BATCH.

My question is: On a server model, does this BATCH job that writes to a
display terminal run at full server speed or does it run in the interactive
penalty box and cause the cpu wasting CFINT job to run?

The code follows. I have included it in case what I am asking is not clear.
Or it might be usefull as tutorial on the use of the Device parm of the
OvrDspf cmd.

Thanks for the help,
Steve Richter

1. Add the following to a srcmbr BatMenu in qgpl/qcmdsrc:
            CMD        PROMPT('Batch job display test')
            PARM       KWD(DEVICE) TYPE(*CHAR) LEN(10) +
                         PROMPT('Device name')
2. Create the command:
        CrtCmd  qgpl/batmenu qgpl/qcmdsrc batmenu

3. Add the following source code to dspf srcmbr BatMenu in qgpl/qddssrc:
 A          R BATMENU1
 A                                  2  2'MENU'
 A                                  4  2' 1. SNDMSG'
 A                                 10  2'90. SIGNOFF'
 A                                 12  2'OPTION:'
 A            OPTN           2  0B 12 10EDTCDE(Z)
4. Create the dspf:
        CrtDspf qgpl/batmenu qgpl/qddssrc batmenu

5. Add the following source code to clp srcmbr BatMenu in qgpl/qclsrc:
             PGM        PARM(&DEVICE)
             DCL        VAR(&DEVICE) TYPE(*CHAR) LEN(10)

             DCLF       FILE(BATMENU)
             DCL        VAR(&JOB) TYPE(*CHAR) LEN(10)
             DCL        VAR(&USER) TYPE(*CHAR) LEN(10)
             DCL        VAR(&JOBTYPE) TYPE(*CHAR) LEN(1)


 B1:         DO
             CHGVAR     VAR(&OPTN) VALUE(0)
             SNDRCVF    RCDFMT(BATMENU1)
             IF         COND(&OPTN *EQ 90) THEN(GOTO CMDLBL(E1))

             IF         COND(&OPTN *EQ 1) THEN(DO)
             SNDMSG     MSG('Job' *BCAT &JOB *BCAT 'is job type' +
                          *BCAT &JOBTYPE) TOUSR(&USER)


             GOTO       CMDLBL(B1)
 E1:         ENDDO

6. Create the cl pgm
            CrtClPgm  qgpl/batmenu  qgpl/qclsrc

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