pmidstr(3) — Linux manual page

PMIDSTR(3)              Library Functions Manual              PMIDSTR(3)

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).

COLOPHON

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨http://www.pcp.io/⟩.  If you have a bug report for this manual
       page, send it to pcp@groups.io.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
       (At that time, the date of the most recent commit that was found
       in the repository was 2024-06-14.)  If you discover any rendering
       problems in this HTML version 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 manual page), send a mail to
       man-pages@man7.org

Performance Co-Pilot               PCP                        PMIDSTR(3)

Pages that refer to this page: pmid_helper(3), pmindomstr(3), pmsemstr(3), pmtypestr(3), pmunitsstr(3), pmwebapi(3)

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