Your operating system uses the job control language (JCL) you supply with your DFSORT program control statements to:

• Identify you as an authorized user
• Allocate the necessary resources to run your job
• Run your job
• Return information to you about the results
• Terminate your job.

Required JCL includes a JOB statement, an EXEC statement, and several DD statements. The statements you need and their exact form depend upon whether you:

• Use an EXEC statement in the input job stream or a system macro instruction within another program to invoke DFSORT
• Use EXEC statement cataloged procedures to invoke DFSORT
• Specify various DFSORT control statements or PARM options
• Want to use program exits to activate routines of your own
• Use dynamic binding or link-editing
• Want to see diagnostic messages.

The JCL statements and their functions are listed in the following. Details on coding the individual statements are presented in subsequent sections.

JCL Statement

Description

//JOBLIB DD

Defines your program link library if it is not already known to the system

//STEPLIB DD

Same as //JOBLIB DD

//SORTLIB DD

Defines the data set that contains special load modules if it is not already known to the system

//SYSOUT DD¹

Defines the message data set

//SYMNAMES DD

Defines the SYMNAMES data set containing statements to be used for symbol processing

//SYMNOUT DD

Defines the data set in which SYMNAMES statements and the symbol table are to be listed

//SORTIN DD¹

Defines the input data set for a sort or copy

//SORTINnn DD¹

Defines the input data sets for a merge

//SORTOUT DD¹

Defines the SORTOUT output data set for a sort, merge, or copy

//outfil DD

Defines an OUTFIL output data set for a sort, merge, or copy

//SORTWKdd DD¹

Defines intermediate storage data sets for a sort

//DFSPARM DD¹

Contains DFSORT PARM options and program control statements

//SYSIN DD

Contains DFSORT program control statements

//SORTCNTL DD¹

Same as //SYSIN DD

//SORTDIAG DD

Specifies that all messages and program control statements be printed

//SORTCKPT DD

Defines the data set for checkpoint records

//SYSUDUMP DD

Defines the data set for output from a system ABEND dump routine

//SYSMDUMP DD

Same as //SYSUDUMP DD

//SYSABEND DD

Same as //SYSUDUMP DD

//SORTSNAP DD

Defines the snap dump data set dynamically allocated by DFSORT

//ddname

Defines the data set containing exit routines (as specified in the MODS program control statement).

The following DD statements are necessary only for dynamic binding or link-editing of exit routines

//SYSPRINT DD

Defines the message data set for the linkage editor

//SYSUT1 DD

Defines the intermediate storage data set for the linkage editor

//SYSLIN DD

Defines the data set for control information for the linkage editor

//SYSLMOD DD

Defines the data set for output from the linkage editor

//SORTMODS DD

Defines the temporary partitioned data set for user exit routines from SYSIN.

¹

These are the default ddnames with which DFSORT was delivered. SYSOUT and DFSPARM may have been changed during DFSORT installation. You can change all of the indicated ddnames at run time. For override information, see Specification/override of DFSORT options.