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pmgetindomarchive(3)

NAME

   pmGetInDomArchive  - get instance identifiers for a performance metrics
   instance domain

C SYNOPSIS

   #include <pcp/pmapi.h>

   int pmGetInDomArchive(pmInDom indom, int **instlist, char ***namelist);

   cc ... -lpcp

DESCRIPTION

   Provided  the  current  Performance  Metrics  Application   Programming
   Interface  (PMAPI)  context  is  associated with a set of archive logs,
   pmGetInDomArchive will scan  the  union  of  all  the  instance  domain
   metadata  for  the  instance  domain indom, and return via instlist the
   internal instance identifiers for all instances, and via  namelist  the
   full external identifiers for all instances.

   This routine is a specialized version of the more general PMAPI routine
   pmGetInDom.

   The number of instances found is returned as the function  value  (else
   less than zero to indicate an error).

   The  value  for the instance domain indom is typically extracted from a
   pmDesc structure, following a call to pmLookupDesc(3) for a  particular
   performance metric.

   The  resulting  lists  of instance identifiers (instlist and namelist),
   and the names that the elements of namelist point to,  will  have  been
   allocated  by  pmGetInDomArchive with two calls to malloc(3), and it is
   the responsibility of the caller to free(instlist)  and  free(namelist)
   to release the space when it is no longer required.

   When  the  result  of pmGetInDomArchive is less than one, both instlist
   and namelist are undefined (no space will have been allocated,  and  so
   calling free(3) is a singularly bad idea).

PCP ENVIRONMENT

   Environment variables with the prefix PCP_ are used to parameterize the
   file and directory names used by PCP.  On each installation,  the  file
   /etc/pcp.conf  contains  the  local  values  for  these variables.  The
   $PCP_CONF variable may be used to specify an alternative  configuration
   file,  as  described in pcp.conf(5).  Values for these variables may be
   obtained programmatically using the pmGetConfig(3) function.

SEE ALSO

   PMAPI(3),     pmGetConfig(3),      pmGetInDom(3),      pmLookupDesc(3),
   pmLookupInDomArchive(3),    pmNameInDomArchive(3),    pcp.conf(5)   and
   pcp.env(5).

DIAGNOSTICS

   PM_ERR_NOTARCHIVE
          the current PMAPI context  is  not  associated  with  a  set  of
          archive logs

   PM_ERR_INDOM_LOG
          indom is not a defined instance domain identifier for the set of
          archive logs



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