On Sat, 29 Dec 2007 10:48:30 -0600, Rick Fochtman wrote:
>-------------------------<snip>---------------
>
>>>IIRC, SYS1.NULLFILE was recognized by the system as a special case of
>>>DUMMY. But it filled in the DSNAME field of the JFCB.
>>
>>You are thinking of DSN=NULLFILE. Now we also have PATH=/dev/null.
>>
>---------------------<unsnip>----------------------
>No, I was thinking specifically of SYS1.NULLFILE, a "qualified" dataset
>name.
>
Hmmm:
12.22.2.9 "z/OS V1R7.0 MVS JCL Reference"
NULLFILE
Specifies a dummy data set. NULLFILE has the same effect as coding
the DD DUMMY
parameter. NULLFILE must be coded as a single-word parameter. For
instance, IBM
does not support the use of NULLFILE to obtain a dummy data set for
these (or
other) formats:
+ When followed by a member name
+ As a qualifier in a qualified data set name
<<<<<<<<<<<<<<<<<<<<<<<<<
+ As a temporary data set name.
This appears to explicitly exclude what you're thinking specifically of.
-- gil
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