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To set user and group IDs in a program
z/OS MVS JCL Reference
These controls allow users to run a program with the user ID of the file owner or the group ID of the file owner of the program file. They control access authorization a particular program is running. The file owner can set the controls any time, not just in the DD statement.
Do not specify these controls in JCL, because they will be reset when the file is written.
The system overrides the SISUID and SISGID parameters and sets the controls so that no users can run the program when either:
Then, for the program to be run, the file owner must reset the controls.
Copyright IBM Corporation 1990, 2014