Use &SYSPUNCH_DSN in a macro definition to obtain the name of the data set to which the assembler is writing the object records when assembler option DECK is specified.
The local-scope system variable symbol &SYSPUNCH_DSN is assigned a read-only value each time a macro definition is called.
When the assembler runs on the z/OS operating systems, the value of the character string assigned to &SYSPUNCH_DSN is always the value stored in the JFCB for SYSPUNCH. If SYSPUNCH is allocated to DUMMY, or a NULLFILE, the value in &SYSPUNCH_DSN is NULLFILE.
When the assembler runs on the CMS component of the VM operating systems, the value of the character string assigned to &SYSPUNCH_DSN is determined as follows:
| SYSPUNCH Allocated To: | Contents of &SYSPUNCH_DSN: |
|---|---|
| CMS file | The 8-character filename, the 8-character filetype, and the 2-character filemode of the file, each separated by a space |
| Dummy file (no physical I/O) | DUMMY |
| Punch | PUNCH |
| Labeled tape file | The data set name of the tape file |
| Unlabeled tape file | TAPn, where n is a value from 0 to 9, or A to F. |
On z/VSE, the value of the character string assigned to &SYSPUNCH_DSN is determined as follows:
| SYSPCH Assigned To: | Contents of &SYSPUNCH_DSN: |
|---|---|
| Disk file | The file-id |
| Punch | SYSPCH |
| Labeled tape file | The file-id of the tape file |
| Unlabeled tape file | SYSPCH |
Examples:
On z/OS, &SYSPUNCH_DSN might be assigned a value such as:
IBMAPC.IBMAPCA.JOB06734.D0000103.?
On CMS, &SYSPUNCH_DSN might be assigned a value such as:
PUNCH
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