NAME

       __pmConvertTime - convert tm structure to timeval structure

C SYNOPSIS

       #include "pmapi.h"
       #include "libpcp.h"

       int __pmConvertTime(struct tm *tmin, struct timeval *origin, struct timeval *rslt);

       cc ... -lpcp

CAVEAT

       This documentation is intended for internal Performance Co-Pilot (PCP) developer use.

       These  interfaces  are not part of the PCP APIs that are guaranteed to remain fixed across
       releases, and they may not work, or may provide different semantics at some point  in  the
       future.

DESCRIPTION

       __pmConvertTime  accepts a tm structure that has been filled in by __pmParseCtime(3) and a
       reference time point origin, and fills in the given rslt structure with the time the  user
       meant when he specified a partial ctime or positive or negative time interval.

       Typically,  the  argument  origin is the start time for a set of  PCP archive logs, unless
       the user specified a negative interval offset, in which case it is the  end  time  of  the
       log.

       __pmConvertTime  returns  0  if  successful.  It returns -1 and writes an error message to
       stderr, if an error is detected.

       Use pmNewZone(3), pmNewContextZone(3) or pmUseZone(3) to establish a new current  timezone
       that will effect __pmConvertTime.

SEE ALSO

       PMAPI(3),  pmNewContextZone(3),  pmNewZone(3),  pmParseInterval(3),  pmParseTimeWindow(3),
       pmUseZone(3), __pmParseCtime(3) and __pmParseTime(3).