NAME

       pmLoadNameSpace - load a local PMNS for an application

C SYNOPSIS

       #include <pcp/pmapi.h>

       int pmLoadNameSpace(const char *filename);

       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  pmLoadNameSpace  or
       pmLoadASCIINameSpace(3).   If the application is to use a distributed PMNS, then it should
       NOT make a call to load the PMNS explicitly.

       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.

       Externally a PMNS is stored in an ASCII format as described in pmns(5).

       By default, multiple names in the PMNS are not allowed to  be  associated  with  a  single
       Performance  Metrics  Identifier  (PMID).  pmLoadASCIINameSpace(3) provides an alternative
       interface with user-defined control over the processing of duplicate PMIDs in the PMNS.

       pmLoadNameSpace 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),   pmLoadASCIINameSpace(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  and  load  more  than  one  PMNS,  or  to  call  either
              pmLoadNameSpace and/or pmLoadASCIINameSpace(3) more than once.

       PM_ERR_PMNS

              Syntax error in the PMNS file.