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pmparseinterval(3) — Linux manual page

PMPARSEINTERVAL(3) Library Functions Manual PMPARSEINTERVAL(3)

NAME top

 pmParseInterval - convert interval string to binary time structure

C SYNOPSIS top

 #include <pcp/pmapi.h>
 int pmParseInterval(const char *string, struct timespec *rslt,
 char **errmsg);
 cc ... -lpcp

DESCRIPTION top

 pmParseInterval parses the argument string specifying an interval
 of time and fills in the tv_sec and tv_nsec components of the rslt
 structure to represent that interval (nanosecond precision).
 The input string is most commonly the argument following a -t com‐
 mand line option to a PCP application, and the syntax is fully de‐
 scribed in PCPIntro(1).

DIAGNOSTICS top

 pmParseInterval returns 0 and errmsg is undefined if the parsing
 is successful.
 If the given string does not conform to the required syntax pmPar‐
 seInterval returns -1 and a dynamically allocated error message
 string in errmsg. The error message is terminated with a newline
 and includes the text of the input string along with an indicator
 of the position at which the error was detected, e.g.
 4minutes 30mumble
 ^ -- unexpected value
 In the case of an error, the caller is responsible for calling
 free(3) to release the space allocated for errmsg.

COMPATIBILITY top

 Prior to PCP 7.0 the rslt argument was a struct timeval. To sup‐
 port PMAPI transition, the old interface and semantics can be used
 if applications are recompiled with -DPMAPI_VERSION=2.
 For a time in PCP 6.x there was a routine with the same semantics
 as the current pmParseInterval called pmParseHighResInterval al‐
 though this is now deprecated and compile-time support for pm‐
 ParseHighResInterval will be removed in a future release.

SEE ALSO top

 PCPIntro(1), free(3), PMAPI(3) and pmParseTimeWindow(3).

COLOPHON top

 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年08月11日. (At that time, the date of the most recent commit
 that was found in the repository was 2025年08月11日.) 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 PMPARSEINTERVAL(3)

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Pages that refer to this page: pcp-free(1), pcp-meminfo(1), pcp-mpstat(1), pcp-netstat(1), pcp-pidstat(1), pcp-ps(1), pcp-rocestat(1), pcp-slabinfo(1), pcp-zoneinfo(1), pmseries(1), __pmconverttime(3), __pmparsectime(3), __pmparsetime(3), pmparsetimewindow(3), pmwebapi(3)

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