PMINDOMSTR(3)             Library Functions Manual             PMINDOMSTR(3)

NAME         top

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

C SYNOPSIS         top

       #include <pcp/pmapi.h>

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

       cc ... -lpcp

DESCRIPTION         top

       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
       particular 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

NOTES         top

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


       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)

SEE ALSO         top

       PMAPI(3), pmGetConfig(3), pmIDStr(3), pmTypeStr(3), pmSemStr(3),
       pmUnitsStr(3), pmLookupDesc(3), pcp.conf(5) and pcp.env(5).

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2017-09-15.  If you discover any rendering problems in this HTML ver‐
       sion of the page, or you believe there is a better or more up-to-date
       source for the page, or you have corrections or improvements to the
       information in this COLOPHON (which is not part of the original man‐
       ual page), send a mail to

Performance Co-Pilot                 PCP                       PMINDOMSTR(3)

Pages that refer to this page: pmidstr(3)pmsemstr(3)pmtypestr(3)pmunitsstr(3)