NAME

       pmIDStr, pmIDStr_r - convert a performance metric identifier into a string

C SYNOPSIS

       #include <pcp/pmapi.h>

       const char *pmIDStr(pmID pmid);
       char *pmIDStr_r(pmID pmid, char *buf, int buflen);

       cc ... -lpcp

DESCRIPTION

       For  use  in  error  and diagnostic messages, pmIDStr returns a `human readable' version of the specified
       Performance Metric Identifier (PMID).  The pmIDStr_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.

       Internally, a PMID is encoded with three fields: domain, cluster and item.  pmIDStr returns a string with
       each of the fields appearing as decimal numbers, separated by periods.

       The string value result from pmIDStr is held in a single static buffer, so the  returned  value  is  only
       valid until the next call to pmIDStr.

NOTES

       pmIDStr  returns  a pointer to a static buffer and hence is not thread-safe.  Multi-threaded applications
       should use pmIDStr_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 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),  pmInDomStr(3),  pmTypeStr(3),  pmSemStr(3),  pmUnitsStr(3),  pmLookupDesc(3),
       pcp.conf(5) and pcp.env(5).