int pmdaInstance(pmInDom indom , int inst , char * name , __pmInResult ** result , pmdaExt * pmda );
The result structure is constructed by pmdaInstance and will contain one or more instance names and/or identifiers as specified by the inst and name arguments.
If inst has the value PM_IN_NULL and name is a null string, result will contain all the instances names and identifiers in the instance domain.
If inst is PM_IN_NULL but name is the name of an instance in the instance domain indom , then result will contain the instance identifier for instance name . Note that if name contains no spaces, partial matching up to the first space in the instance name is performed, i.e. `` 1 '' will match instance name `` 1 minute ''. If name contains an embedded space, then no partial matching is performed and name should match one of the instance names exactly.
If name is a null string but inst is an instance identifier in the instance domain indom , then result will contain the name for instance inst . The result structure is allocated with malloc (3) and should be released by the caller with free (3).
Because of optional partial matching up to the first space in the instance name, the PMDA developer should ensure that if instance names are allowed to have spaces, the names are unique up to the first space.