1PMLOADNAMESPACE(3)         Library Functions Manual         PMLOADNAMESPACE(3)
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NAME

6       pmLoadNameSpace - load a local PMNS for an application
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C SYNOPSIS

9       #include <pcp/pmapi.h>
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11       int pmLoadNameSpace(const char *filename);
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13       cc ... -lpcp
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DESCRIPTION

16       If  the  application  wants  to force using a local Performance Metrics
17       Name Space (PMNS) instead of a distributed PMNS then it must  load  the
18       PMNS using pmLoadNameSpace or pmLoadASCIINameSpace(3).  If the applica‐
19       tion is to use a distributed PMNS, then it should NOT make  a  call  to
20       load the PMNS explicitly.
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22       Most  applications  using a Performance Metrics Application Programming
23       Interface (PMAPI) context (of any type, so PM_CONTEXT_HOST  or  PM_CON‐
24       TEXT_ARCHIVE  or PM_CONTEXT_LOCAL) should not need to call pmLoadNameS‐
25       pace.
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27       The filename argument designates the PMNS of  interest.   For  applica‐
28       tions  not  requiring  a tailored PMNS, the special value PM_NS_DEFAULT
29       may be used for filename, to force the default local PMNS to be loaded.
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31       The default local PMNS is  found  in  the  file  $PCP_VAR_DIR/pmns/root
32       unless  the environment variable PMNS_DEFAULT is set, in which case the
33       value is assumed to be the pathname to the file containing the  default
34       local PMNS.
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36       Externally a PMNS is stored in an ASCII format as described in PMNS(5).
37       However, note that pmLoadNameSpace assumes filename  does  not  contain
38       any  C-style  comments,  pre-processor directives or macros; if this is
39       not the case, pmLoadASCIINameSpace(3) should be used instead.
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41       As of Version 3.10.3 of PCP, by default, multiple names in the PMNS are
42       allowed  to  be associated with a single Performance Metrics Identifier
43       (PMID) and this is unconditionally allowed by pmLoadNameSpace.  pmLoad‐
44       ASCIINameSpace(3)  provides  an alternative interface with user-defined
45       control over the handling of duplicate names for the same PMID  in  the
46       PMNS.
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48       pmLoadNameSpace returns zero on success.
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FILES

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

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

63       PMAPI(3),  pmGetConfig(3), pmLoadASCIINameSpace(3), pmTrimNameSpace(3),
64       pcp.conf(5), pcp.env(5) and PMNS(5).
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DIAGNOSTICS

67       Syntax and other errors in the parsing of  the  PMNS  are  reported  on
68       stderr with a message of the form ``Error Parsing ASCII PMNS: ...''.
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70       PM_ERR_DUPPMNS
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72              It  is  an  error to try and load more than one PMNS, or to call
73              either pmLoadNameSpace and/or pmLoadASCIINameSpace(3) more  than
74              once.
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76       PM_ERR_PMNS
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78              Syntax error in the PMNS file.
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