- __tzset();
- __time_to_tm(*t - __timezone, result);
- result->tm_isdst = -1;
- return __dst_adjust(result);
+ /* Reject time_t values whose year would overflow int because
+ * __secs_to_zone cannot safely handle them. */
+ if (*t < INT_MIN * 31622400LL || *t > INT_MAX * 31622400LL) {
+ errno = EOVERFLOW;
+ return 0;
+ }
+ __secs_to_zone(*t, 0, &tm->tm_isdst, &tm->__tm_gmtoff, 0, &tm->__tm_zone);
+ if (__secs_to_tm((long long)*t + tm->__tm_gmtoff, tm) < 0) {
+ errno = EOVERFLOW;
+ return 0;
+ }
+ return tm;