settimeofday
if (settimeofday(&tv, &tz) < 0)
if (settimeofday(stv, stz)) {
int settimeofday(const struct timeval *, const struct timezone *);
ATF_REQUIRE_EQ(-1, settimeofday(&tp, &tzp));
ATF_REQUIRE_EQ(0, settimeofday(&tp, &tzp));
error = settimeofday(&now, NULL);
if (settimeofday(timeval_to_set, NULL) == -1) {