&SYSIN_VOLUME System Variable Symbol
Use &SYSIN_VOLUME in a macro definition to obtain the volume
identifier of the first volume containing the data set from which the
assembler is reading the source module.
z/VM and z/OS
If concatenated data sets are used to provide the source module,
&SYSIN_VOLUME has a value equal to the volume identifier of the
first volume containing the data set that contains the macro call
instruction.
End of z/VM and z/OS
The local-scope system variable symbol &SYSIN_VOLUME is assigned a
read-only value each time a macro definition is called.
z/VM
If the assembler runs on the CMS component of the
z/VM operating system, and the source module is being read
from a Shared File System CMS file, &SYSIN_VOLUME is assigned the value
"** SFS".
End of z/VM
If the volume on which the input data set resides is not
labeled,
&SYSIN_VOLUME is assigned a null character string.
Notes:
- If the SOURCE user exit provides the data set information
then the value in &SYSIN_VOLUME is the value extracted from the
Exit-Specific Information block described in
the section "Exit-Specific Information Block" in the HLASM Programmer's Guide.
- The value of the type attribute of &SYSIN_VOLUME
(T'&SYSIN_VOLUME) is U, unless &SYSIN_VOLUME is
assigned a null
character string, in which case the value of the type attribute is O.
- The value of the count attribute of &SYSIN_VOLUME
(K'&SYSIN_VOLUME) is equal to
the
number of characters assigned
as a value to &SYSIN_VOLUME. If &SYSIN_VOLUME is assigned a null
character string, the value of the count attribute is 0.
The maximum length of this system variable symbol is 6.
- Throughout the use of a macro definition, the value of &SYSIN_VOLUME
is considered a constant.
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