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pmParseInterval(3)

Performance Co-Pilot
Aliases: pmparseinterval(3), pmparseinterval(3)

libpcp3-dev

Performance Co-Pilot library and headers

pcp-doc

Documentation and tutorial for the Performance Co-Pilot

NAME

pmParseInterval - convert interval string to timeval structure

C SYNOPSIS

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

DESCRIPTION

pmParseInterval parses the argument string specifying an interval of time and fills in the tv_sec and tv_usec components of the rslt structure to represent that interval.
The input string is most commonly the argument following a -t command line option to a PCP application, and the syntax is fully described in PCPIntro(1).

DIAGNOSTICS

pmParseInterval returns 0 and errmsg is undefined if the parsing is successful.
If the given string does not conform to the required syntax pmParseInterval 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.
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