The ArgList attribute specifies which attributes need to be passed to agent entry points. The agent framework populates the ArgListValues attribute with the list of attributes and their associated values.
In C++ agents, the value of the ArgListValues attribute is passed through a parameter of type void **. For example, the signature of the online entry point is:
unsigned int res_online(const char *res_name, void **attr_val);
In script agents, the value of the ArgListValues attribute is passed as command-line arguments to the entry point script.
The number of values in the ArgListValues should not exceed more than 425. This requirement becomes a consideration if an attribute in the ArgList is a keylist, a vector, or an association. Such type of non-scalar attributes can typically take any number of values, and when they appear in the ArgList, the agent has to compute ArgListValues from the value of such attributes. If the non-scalar attribute contains many values, it will increase the size of ArgListValues. Hence when developing an agent, this consideration should be kept in mind when adding a non-scalar attribute in the ArgList. Users of the agent need to be notified that the attribute should not be configured to be so large that it pushes that number of values in the ArgListValues attribute to be more than 425.