centos man page for pmindomstr

PMINDOMSTR(3)						     Library Functions Manual						     PMINDOMSTR(3)

NAME
       pmInDomStr, pmInDomStr_r - convert a performance metric instance domain identifier into a string

C SYNOPSIS
       #include <pcp/pmapi.h>

       const char *pmInDomStr(pmInDom indom);
       char *pmInDomStr_r(pmInDom indom, char *buf, int buflen);

       cc ... -lpcp

DESCRIPTION
       For  use  in  error and diagnostic messages, pmInDomStr return a 'human readable' version of the specified instance domain identifier.  The
       pmInDomStr_r function does the same, but stores the result in a user-supplied buffer buf of length buflen, which should have  room  for	at
       least 20 bytes.

       The  value for the instance domain indom is typically extracted from a pmDesc structure, following a call to pmLookupDesc(3) for a particu-
       lar performance metric.

       Internally, an instance domain identifier is encoded as follows;

	    typedef struct {
		int		pad:2;
		unsigned int	domain:8;	 /* the administrative PMD */
		unsigned int	serial:22;	 /* unique within PMD */
	    } __pmInDom_int;

       pmInDomStr returns a string with each of the domain and serial subfields appearing as decimal numbers, separated by periods.

       The string value returned by pmInDomStr is held in a single static buffer, so the returned value is only valid until the next call to pmIn-
       DomStr.

NOTES
       pmInDomStr returns a pointer to a static buffer and hence is not thread-safe.  Multi-threaded applications should use pmInDomStr_r instead.

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	configura-
       tion 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), pmIDStr(3), pmLookupDesc(3), pcp.conf(5) and pcp.env(5).

Performance Co-Pilot							PCP							     PMINDOMSTR(3)