NAME

       pmdaPMID - translate a dynamic performance metric name into a PMID

C SYNOPSIS

       #include <pcp/pmapi.h>
       #include <pcp/pmda.h>

       int pmdaPMID(char *name, pmID *pmid, pmdaExt *pmda);

       cc ... -lpcp_pmda -lpcp

DESCRIPTION

       As  part of the Performance Metrics Domain Agent (PMDA) API (see PMDA(3)), pmdaPMID is the
       generic callback for translating a dynamic metric name into a PMID (pmid).

       Because implementing dynamic performance metrics requires specific PMDA support,  and  the
       facility is an optional component of a PMDA (most PMDAs do not support dynamic performance
       metrics), pmdaPMID is a skeleton implementation that returns PM_ERR_NAME.

       A PMDA that supports dynamic performance metrics will  provide  a  private  callback  that
       replaces  pmdaPMID (by assignment to version.four.pmid of the pmdaInterface structure) and
       implements the translation from a dynamic performance  metric  name  into  the  associated
       pmid.

CAVEAT

       The PMDA must be using PMDA_PROTOCOL_4 or later, as specified in the call to pmdaDSO(3) or
       pmdaDaemon(3).

DIAGNOSTICS

       pmdaPMID returns PM_ERR_NAME if the name is not recognized or cannot be  translated,  else
       returns 0.

SEE ALSO

       PMAPI(3), PMDA(3), pmdaDaemon(3), pmdaDSO(3), pmdaMain(3) and pmLookupName(3).