Dummy z/OS UNIX files

The following DD statements define a dummy z/OS UNIX file. The statements are equivalent; for DUMMY3, the extra slashes (/) are compressed to single slashes.

//DUMMY1  DD PATH='/dev/null'
//DUMMY2  DD DUMMY,PATH=/ANYNAME
//DUMMY3  DD PATH='//dev///null'

The system checks the syntax of pathnames specified with DUMMY. In the DD statement DUMMY2, the pathname must be a valid name.