Chapter 13. Using Rexx In Tso/E And Other Mvs Address Spaces; Services Available To Rexx Execs - IBM TSO/E REXX User Manual

Chapter 13. Using REXX in TSO/E and Other MVS Address
Spaces
Services Available to REXX Execs . . . . . . . . . . . . . . . . . 171
Running Execs in a TSO/E Address Space . . . . . . . . . . . . . . 173
Running Execs in a Non-TSO/E Address Space . . . . . . . . . . . . 177
Summary of TSO/E Background and MVS Batch . . . . . . . . . . . . 180
Defining Language Processor Environments
This chapter describes how to use REXX in TSO/E and in non-TSO/E address
spaces in MVS. It also briefly describes the concept of a language processor
environment.

Services Available to REXX Execs

This book, until now, has described writing and running REXX execs in the TSO/E
address space. Besides TSO/E, execs can run in other address spaces within MVS.
Where an exec can run is determined by the types of services the exec requires.
There are services that are available to an exec that runs in any address space,
TSO/E or non-TSO/E; and there are more specific services available only in a
TSO/E address space. The following table lists all the services and where they are
available.
Service
REXX language instructions - These instructions are used throughout
this book. For a description of each one, see z/OS TSO/E REXX Reference.
Built-in functions - A brief description of each built-in function appears in
"Built-In Functions" on page 63. A longer description appears in z/OS TSO/E
REXX Reference.
TSO/E REXX commands - These commands consist of:
v Data stack commands - For more information, see "Chapter 11. Storing
Information in the Data Stack" on page 135.
DELSTACK
DROPBUF
MAKEBUF
NEWSTACK
© Copyright IBM Corp. 1988, 2001
Running an Exec in the Foreground. . . . . . . . . . . . . . . . 173
Things to Consider When Allocating to a System File (SYSPROC or
SYSEXEC) . . . . . . . . . . . . . . . . . . . . . . . 174
Allocating to SYSEXEC . . . . . . . . . . . . . . . . . . . 174
Allocating to SYSPROC . . . . . . . . . . . . . . . . . . . 174
Running an Exec from a CLIST . . . . . . . . . . . . . . . . 175
Running an Exec in the Background
Using an Exec Processing Routine to Invoke an Exec from a Program
Using IRXJCL to Run an Exec in MVS Batch . . . . . . . . . . . . 178
Using the Data Stack in TSO/E Background and MVS Batch
CAPABILITIES . . . . . . . . . . . . . . . . . . . . . . . 180
REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . 181
What is a Language Processor Environment? . . . . . . . . . . . . 181
Customizing a Language Processor Environment . . . . . . . . . . . 182
. . . . . . . . . . . . . . . 176
. . . . . . . . . . . . . 181
Non-TSO/E
Address Space
X
X
X
X
X
X
177
. . . . . . 180
TSO/E Address
Space
X
X
X
X
X
X
171