Erlang 18
Erlang 18
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11. Definition of Instrumentation Functions

11 Definition of Instrumentation Functions

The section Definition of Instrumentation Functions describes the user defined functions, which the agent calls at different times.

11.1 Variable Instrumentation

For scalar variables, a function f(Operation, ...) must be defined.

The Operation can be new, delete, get, is_set_ok, set, or undo.

In case of an error, all instrumentation functions may return either an SNMPv1 or an SNMPv2 error code. If it returns an SNMPv2 code, it is converted into an SNMPv1 code before it is sent to a SNMPv1 manager. It is recommended to use the SNMPv2 error codes for all instrumentation functions, as these provide more details. See Appendix A<