Using the MVSVAR Function

The MVSVAR function retrieves information about MVS™, TSO/E, and the current session, such as the symbolic name of the MVS system, or the security label of the TSO/E session. The information retrieved depends on the argument specified.

To retrieve the information, use the MVSVAR function immediately followed by an argument value enclosed in parentheses. For example, to find out the APPC/MVS logical unit (LU) name, use the MVSVAR function with the argument SYSAPPCLU.

appclu = MVSVAR('SYSAPPCLU')

The MVSVAR function is available in any MVS address space. Compare this to the SYSVAR function which also retrieves system information but can only be used in REXX execs that run in the TSO/E address space.

Many of the MVSVAR arguments retrieve the same information as do CLIST control variables.

The following table lists the items of information that are available for retrieval by MVSVAR.

Argument Value	Description
SYSAPPCLU	the APPC/MVS logical unit (LU) name
SYSDFP	the level of MVS/Data Facility Product (MVS/DFP)
SYSMVS	the level of the base control program (BCP) component of z/OS®
SYSNAME	the name of the system your REXX exec is running on, as specified in the SYSNAME statement in SYS1.PARMLIB member IEASYSxx
SYSSECLAB	the security label (SECLABEL) name of the TSO/E session
SYSSMFID	identification of the system on which System Management Facilities (SMF) is active
SYSSMS	indicator whether DFSMS/MVS is available to your REXX exec
SYSCLONE	MVS system symbol representing its system name
SYSPLEX	the MVS sysplex name as found in the COUPLExx or LOADxx member of SYS1.PARMLIB
SYMDEF	symbolic variables of your MVS system