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InfoScale™ 9.0 Cluster Server Agent Developer's Guide - AIX, Linux, Solaris, Windows

Last Published: 2025-04-13

Product(s): InfoScale & Storage Foundation (9.0)

Platform: AIX,Linux,Solaris,Windows

RegList

RegList is a type level keylist attribute that can be used to store, or register, a list of certain resource level attributes. The agent calls the attr_changed entry point for a resource when the value of an attribute listed in RegList is modified. The RegList attribute is useful where a change in the values of important attributes require specific actions that can be executed from the attr_changed entry point.

By default, the attribute RegList is not included in a resource's type definition, but it can be added using either of the two methods shown below.

Assume the RegList attribute is added to the FileOnOff resource type definition and its value is defined as PathName. Thereafter, when the value of the PathName attribute for a FileOnOff resource is modified, the attr_changed entry point is called.

Method one is to modify the types definition file (types.cf for example) to include the RegList attribute when VCS is not running. Add a line in the definition of a resource type that resembles:
```
    static keylist RegList = { attribute1_name, 
attribute2_name,...}
```
For example, if the type definition is for the FileOnOff resource and the name of the attribute to register is PathName, the modified type definition would resemble:
```
    .
    .
    .
    type FileOnOff (
           str PathName
           static keylist RegList = { PathName }
           static str ArgList[] = { PathName }
    )
    .
    .
```
Method two is to use the haattr command to add the RegList attribute to a resource type definition and then modify the value of the type's RegList attribute using the hatype command when VCS is running; the commands are:
```
     haattr -add -static resource_type RegList -keylist 
    
     
```
- To set value
  # hatype -modify resource_type RegList attribute_name1 attribute_name2
- To add a new key
  # hatype -modify resource_type RegList -add attribute_name3
For example:
- # haattr -add -static FileOnOff RegList -keylist
- # hatype -modify FileOnOff RegList PathName
- # hatype -modify FileOnOff RegList -add PathName

The RegList attribute cannot be overridden.