December 2006
Intermediate to advanced
228 pages
6h 20m
English
book
Introduction to the New Mainframe: Large-Scale Commercial Computing
by Mike Ebbers, Pilar Gonzalez Adrados, Frank Byrne, Rodney Martin, Jon Veilleux
Content preview from Introduction to the New Mainframe: Large-Scale Commercial Computing
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82 Introduction to the New Mainframe: Large-Scale Commercial Computing
that might occur as a result of the use of these instructions. Privileged
instructions allow a high level of access to powerful system functions and can,
therefore, cause security or integrity problems if they are used inappropriately.
In order for a program to run
authorized:
It must have the APF attribute assigned to it.
It must also reside in a library that has been defined by the system
programmer as being authorized.
If a program fulfills both of these requirements, then it can access privileged
instructions.
APF libraries are always given a high level of protection by whichever security
software is being used on the system, in order to prevent their misuse.
4.3.6 ...
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