[rescue] Hark, something from the depths of the storage closet!

Lionel Peterson lionel4287 at yahoo.com
Sun May 18 12:29:43 CDT 2003

This reminds me of "IEFBR14" in MVS JCL - it does nothing but return a
successful COND code and returns control to JCL. The magic is that MVS
JCL does file allocation, removal, etc. in JCL, and by making IEFBR14
the program in a given JCL step, you can exploit that feature in the
middle of a job stream...

Initially it was one instruction, but later, IBM improved it by adding
a "clear register" command to ensure the returned code was zero (it
previously depended onthe COND code being set to zero on invocation.

Sorry, history lesson over...

Personally, I find it humorous that 'true' has a built-in help


"Nothing would please me more than being able to hire ten
programmers and deluge the hobby market with good software"
Bill Gates, in "An OpenLetter to Hobbyists" dated February 3, 1976

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