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NAME | C SYNOPSIS | DESCRIPTION | NOTES | PCP ENVIRONMENT | SEE ALSO | COLOPHON |
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PMIDSTR(3) Library Functions Manual PMIDSTR(3)
pmIDStr, pmIDStr_r - convert a performance metric identifier into
a string
#include <pcp/pmapi.h>
const char *pmIDStr(pmID pmid);
char *pmIDStr_r(pmID pmid, char *buf, int buflen);
cc ... -lpcp
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 re‐
sult 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 ap‐
pearing 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.
pmIDStr returns a pointer to a static buffer and hence is not
thread-safe. Multi-threaded applications should use pmIDStr_r in‐
stead.
Environment variables with the prefix PCP_ are used to parameter‐
ize the file and directory names used by PCP. On each installa‐
tion, the file /etc/pcp.conf contains the local values for these
variables. The $PCP_CONF variable may be used to specify an al‐
ternative configuration file, as described in pcp.conf(5). Values
for these variables may be obtained programmatically using the
pmGetConfig(3) function.
PMAPI(3), pmGetConfig(3), pmInDomStr(3), pmTypeStr(3),
pmSemStr(3), pmUnitsStr(3), pmLookupDesc(3), pcp.conf(5) and
pcp.env(5).
This page is part of the PCP (Performance Co-Pilot) project. In‐
formation 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
2025-08-11. (At that time, the date of the most recent commit
that was found in the repository was 2025-08-11.) 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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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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