NAME

       pmLoadASCIINameSpace - establish a local PMNS for an application

C SYNOPSIS

       #include <pcp/pmapi.h>

       int pmLoadASCIINameSpace(const char *filename, int dupok);

       cc ... -lpcp

DESCRIPTION

       If  the  application  wants  to  force using a local Performance Metrics Name Space (PMNS)
       instead of a distributed PMNS then it must load the  PMNS  using  pmLoadASCIINameSpace  or
       pmLoadNameSpace(3).   If  the  application wants to use a distributed PMNS, then it should
       NOT make a call to load the PMNS explicitly.

       Most applications using a Performance Metrics Application  Programming  Interface  (PMAPI)
       context (of any type, so PM_CONTEXT_HOST or PM_CONTEXT_ARCHIVE or PM_CONTEXT_LOCAL) should
       not need to call pmLoadASCIINameSpace.

       The filename argument designates the PMNS of interest.  For applications not  requiring  a
       tailored  PMNS,  the  special  value  PM_NS_DEFAULT may be used for filename, to force the
       default local PMNS to be loaded.

       The default local PMNS is found in the file $PCP_VAR_DIR/pmns/root unless the  environment
       variable PMNS_DEFAULT is set, in which case the value is assumed to be the pathname to the
       file containing the default local PMNS.

       pmLoadASCIINameSpace is a variant of pmLoadNameSpace(3) in which the dupok argument may be
       used  to  control the handling of multiple names in the PMNS that may be associated with a
       single Performance Metric Identifier (PMID).  A value of 0 disallows duplicates, any other
       value  allows  duplicates and the latter is the default behaviour of pmLoadNameSpace(3) as
       of Version 3.10.3 of PCP.

       The other difference is that  when  pmLoadASCIINameSpace  is  used  and  filename  is  not
       PM_NS_DEFAULT,  the  PMNS  file will always be pre-processed with pmcpp(1) as described in
       pmns(5).  This allows a PMNS file that contains C-style comments, pre-processor directives
       or macros to be processed correctly before the PMNS is parsed.

       pmLoadASCIINameSpace returns zero on success.

FILES

       $PCP_VAR_DIR/pmns/root   the   default   local   PMNS,   when   the  environment  variable
                                PMNS_DEFAULT is unset

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), pmLoadNameSpace(3), pmTrimNameSpace(3), pcp.conf(5),  pcp.env(5)
       and pmns(5).

DIAGNOSTICS

       Syntax  and  other errors in the parsing of the PMNS are reported on stderr with a message
       of the form ``Error Parsing ASCII PMNS: ...''.

       PM_ERR_DUPPMNS

              It  is  an  error  to  try  to  load  more  than  one  PMNS,  or  to  call   either
              pmLoadASCIINameSpace and/or pmLoadNameSpace(3) more than once.

       PM_ERR_PMNS

              Syntax error in an ASCII format PMNS.