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pmgetindom(3)

NAME

   pmGetInDom  -  get  instance  identifiers  for  a  performance  metrics
   instance domain

C SYNOPSIS

   #include <pcp/pmapi.h>

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

   cc ... -lpcp

DESCRIPTION

   In the current Performance Metrics  Application  Programming  Interface
   (PMAPI)  context,  locate the description of 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.  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  pmGetInDom  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  pmGetInDom  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),   pmGetInDomArchive(3),    pmLookupDesc(3),
   pmLookupInDom(3), pmNameInDom(3), pcp.conf(5) and pcp.env(5).

DIAGNOSTICS

   PM_ERR_INDOM
          indom is not a valid instance domain identifier



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