pmdaInstance uses the standard PMDA(3) data structures to return
information concerning the instance domain indom.
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
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).
If any errors occur during the execution of pmdaInstance, the result
structure is deallocated. If the instance domain indom is not
supported by the PMDA, pmdaInstance will return PM_ERR_INDOM.
If the inst or name does not correspond to any instances in the indom
domain, pmdaInstance will return PM_ERR_INST.
The PMDA must be using PMDA_INTERFACE_2 or later, as specified in the
call to pmdaDSO(3) or pmdaDaemon(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
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Performance Co-Pilot PCP PMDAINSTANCE(3)