Take a look at the SMF exits. The description that follows is a cut and
paste for the parameter descriptins for IEFUJI. Word 5.
Hope this helps
-Dave Day
.21.7.2 Parameter Descriptions
Register 1 points to the following list of addresses:
Word 1
Address of the common exit parameter area. For details on the parameter
area, see Table 3 in topic 2.16.7.3.
Word 2
Address of a 20-byte area containing the programmer's name (in EBCDIC)
from the JOB statement. This area is aligned left and padded with blanks if
necessary.
Word 3
Address of a one-byte area indicating (in binary) the requested job
selection priority. The value of this field equals the user-assigned
priority of 0 to 14 (taken from the PRTY parameter on the JOB statement).
Word 4
Address of an area containing the accounting information from the JOB
statement. (See "Accounting Information" in topic 2.16.7.4.)
Word 5
Address of a 4-character area that contains the name of the subsystem for
the job being processed. Examples:
a.. ASCH, JES2, or JES3 -- indicates the name of the subsystem that
selected the job
b.. OMVS -- indicates a forked or spawned address space
c.. STC -- indicates a started task
d.. TSO -- indicates a time sharing option task
e.. The jobname -- used if it is four or fewer characters and none of
the above apply
Note: The high-order bit is set in the address of the last parameter to
indicate the end of the parameter list.
----- Original Message -----
From: "Support, DUNNIT SYSTEMS LTD." <[EMAIL PROTECTED]>
Newsgroups: bit.listserv.ibm-main
To: <IBM-MAIN@bama.ua.edu>
Sent: Thursday, March 20, 2008 3:49 PM
Subject: Re: Can forked/spawned address spaces be identified as such?
John,
<[EMAIL PROTECTED]> wrote:
Nobody else has asked, so I will. Why do you want to do this? I'm just
curious.
I could tell you but I would have to kill you.
;)
Actually, I need to be able to determine what the original job name is.
Is the rule correct that every case - with no exceptions - of a
forked/spawned address space has a single digit from 1 to 9 appended to
the
job name? If so, what happens after 9 such spawns?
In addition, in my case, I have a spawned Java job. I'm finding that the
JBNI
and JBNS fields of both the ASCB and the ASSB point to the following
names:
JBNI..... TESTJOB1 JBNS..... BPXAS
Now my question is can I rely and JBNS=BPXAS to determine the parent
address space's name is equal to the child address space's name minus the
child's last job name character?
For those not familiar with BPXAS, here's a little copy and past from what
I
found:
Beginning with OS/390 Version 2 Release 4, OS/390 UNIX System Services
changed from usingAPPC initiators to Workload Manager (WLM) controlled
initiators. The initiator address space name isBPXAS instead of ASCHINT.
BPXAS is a special initiator with special interfaces to WLM and UNIXSystem
Services.Fork and spawn use a WLM service to get an address space to
process a request. The WLM servicechecks its queue to see if there is an
idle
address space from a free pool of BPXAS address spacesthat are waiting for
work. If there are no idle BPXAS address spaces, WLM determines whether a
newone can be created based on system load. If the free pool is empty, an
ASCRE is done using thename BPXAS as the procedure to start a new one.
When a BPXAS address space is finished, theaddress space goes back into
the
free pool. After 30 minutes of being idle, the address space
isterminated.The
spawn service is another way to create a new process. It looks like
fork(),
except that the newprocess is not a copy of the parent process. The child
process inherits file and socket descriptors, aswith the fork(). With a
spawn,
the child process can be created in the parent address space.
TIA,
Jerry
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