NAME

       pmLookupName - translate performance metric names into PMIDs

C SYNOPSIS

       #include <pcp/pmapi.h>

       int pmLookupName(int numpmid, char **namelist, pmID *pmidlist);

       cc ... -lpcp

DESCRIPTION

       Given  a list in namelist containing numpmid full pathnames for performance metrics from a
       Performance Metrics Name  Space  (PMNS),  pmLookupName  returns  the  list  of  associated
       Performance Metric Identifiers (PMIDs) via pmidlist.

       The  result  from  pmLookupName  will  be the number of names translated in the absence of
       errors, else an error code less than zero.  When errors are encountered, the corresponding
       value in pmidlist will be PM_ID_NULL.

       Note  that  the error protocol guarantees there is a 1:1 relationship between the elements
       of namelist and pmidlist, hence both lists contain exactly  numpmid  elements.   For  this
       reason, the caller is expected to have pre-allocated a suitably sized array for pmidlist.

SEE ALSO

       PMAPI(3),  pmGetChildren(3),  pmGetChildrenStatus(3),  pmGetConfig(3), pmLoadNameSpace(3),
       pmNameID(3), pmNewContext(3), pcp.conf(5) and pcp.env(5).

DIAGNOSTICS

       PM_ERR_TOOSMALL
              numpmid must be at least 1

       PM_ERR_NOPMNS
              Failed to access a PMNS for operation.  Note  that  if  the  application  hasn't  a
              priori called pmLoadNameSpace(3) and wants to use the distributed PMNS, then a call
              to pmLookupName must be made after the creation of a context (see pmNewContext(3)).

       PM_ERR_NAME
              One or more of the elements of namelist does not correspond to a valid metric  name
              in the PMNS.

       PM_ERR_NONLEAF
              A name referred to a node in the PMNS but it was not a leaf node.

       PM_ERR_*
              Other diagnostics are for protocol failures when accessing the distributed PMNS.