RUSAGE_SELF
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
case RUSAGE_SELF:
case RUSAGE_SELF:
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN &&
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN &&
err = getrusage(RUSAGE_SELF, &ru);