Where to Begin
Before creating a PDS in which to store your execs, use the “Preliminary Checklist”
to find out information that you can use to make your PDS compatible with other
PDSs at your installation. Then create a PDS with either “Checklist #1: Creating
and Editing a Data Set Using ISPF/PDF” on page 187 or “Checklist #2: Creating a
Data Set with the ALLOCATE Command” on page 190.
After the PDS is created, if you want to be able to invoke those execs implicitly
during that terminal session, you must allocate the PDS to a system file (SYSEXEC
or SYSPROC). The allocation is temporary and must be established for each
terminal session. One way to establish the allocation is to write a setup exec that
automatically executes when you log on. Information about how to write a setup
exec is in Checklist #3 on page 191 and Checklist #4 on page 192. If you do not
know which checklist to use, use Checklist #3.
The following checklists assume that the defaults shipped with TSO/E have not
been altered by your installation. Also if your installation changes system allocations
after you have used the checklists to set up your private allocation, you might need
to use the checklists again to keep your allocations up-to-date.
Preliminary Checklist
1. Issue the LISTALC STATUS command to see the names of all data sets
allocated to SYSEXEC and SYSPROC.
To see what data sets are already defined to SYSEXEC and SYSPROC at your
installation, issue the LISTALC command with the STATUS keyword.
READY
listalc status
You then see several screens of data set names that might look something like
the following. Scroll until you find SYSEXEC and SYSPROC.
--DDNAME---DISP--
ICQ.INFOCTR.LOAD.
STEPLIB KEEP
CATALOG.VTSO022
SYS00006 KEEP,KEEP
CATALOG.VTSO028
KEEP,KEEP
ISP.PHONE.EXEC
SYSEXEC KEEP
ICQ.INFOCTR.ICQCLIB
SYSPROC KEEP
SYS1.TSO.CLIST
KEEP
ISP.ISPF.CLISTS
KEEP
In this example, one data set ISP.PHONE.EXEC is allocated to SYSEXEC, and
three data sets ICQ.INFOCTR.ICQCLIB, SYS1.TSO.CLIST, and
ISP.ISPF.CLISTS are allocated to SYSPROC. (When a space appears below
the data set name, the data set is allocated to the previously-specified file
(DDNAME)).
2. Write down the names of the data sets at your installation that are
allocated to SYSEXEC.
First data set: ______________________________________________
Remaining data sets: ______________________________________________
______________________________________________
Where to Begin
186
z/OS V1R1.0 TSO/E REXX User’s Guide
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