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CentOS 7.0 - man page for __pmspeclocalpmda (centos section 3)

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       __pmSpecLocalPMDA - process command-line argument for the table of DSO PMDAs

       #include <pcp/pmapi.h>
       #include <pcp/impl.h>

       char *__pmSpecLocalPMDA(const char *spec);

       cc ... -lpcp

       PCP  contexts  of  type	PM_CONTEXT_LOCAL  are  used by clients that wish to fetch metrics
       directly from one or more PMDAs on the local host without involving pmcd(1).

       __pmSpecLocalPMDA provides a convenience wrapper to be used by applications that  wish  to
       use  a command line argument (usually with -K) to control the DSO PMDAs that are available
       for a PM_CONTEXT_LOCAL context.

       The spec argument specifies actions for one or more DSO PMDAs using up to four fields sep-
       arated by commas (``,''), namely:
       -  an  opcode with one of the values add (add a new entry), del (delete an existing
	  entry) or clear (clear all entries from the table).
       -  the PMDA's domain number
       -  the path to the PMDA DSO (may be absolute or relative to the	$PCP_VAR_DIR/pmdas
	  directory and the DSO suffix is optional), and
       -  the name of the PMDA's initialization routine.

       All  fields  are  required  to  add  a new entry.  To delete an entry the opcode is
       required plus either or both of the domain number and path fields.   To	clear  all
       entries, only the opcode is required.

       If  spec is parsed successfully, then __pmLocalPMDA(3) is called with the extracted

       On success, __pmSpecLocalPMDA will return NULL.

       On error or failure, __pmSpecLocalPMDA will return a pointer to a static error mes-

       Some examples of valid spec strings:

       clear  Delete all entries from the DSO table.

	      Add  the	``foo''  PMDA  using domain 123.  The PMDA's DSO is most likely in
	      below the directory $PCP_PMDAS_DIR and named foo/foo_pmda.so (for  ELF-style
	      platforms)  or foo/foo_pmda.dylib (for BSD-style platforms) or fooo_pmda.dll
	      (for Windows-style platforms).  The initialization routine for  the  ``foo''
	      PMDA is foo_init().

	      Delete the entry for the DSO with domain 123.

	      Delete the entry with a pathname to the DSO that matches foo/foo_pmda.

	      Delete the entry for the DSO with either domain 123 and/or a pathname to the
	      DSO that matches foo/foo_pmda.

       PMAPI(3), __pmLocalPMDA(3) and pmNewContext(3).

Performance Co-Pilot							       PMSPECLOCALPMDA(3)
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