+
+#ifdef FEATURE_STRPTIME_SANITY_CHECKS
+ /*
+ * Verify that parsing the date recreated from the first
+ * parse operation gets the previous result. If it doesn't,
+ * either strptime() or strftime() are malfunctioning.
+ *
+ * We could string-compare the recreated date with the original
+ * header date, but this leads to false positives as strptime()
+ * may let %a accept all day formats while strftime() will only
+ * create one.
+ */
+ {
+ char recreated_date[100];
+ struct tm *tm;
+ time_t result2;
+
+ tm = gmtime(result);
+ strftime(recreated_date, sizeof(recreated_date), time_formats[i], tm);
+ memset(&gmt, 0, sizeof(gmt));
+ if (NULL == strptime(recreated_date, time_formats[i], &gmt))
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Failed to parse '%s' generated with '%s' to recreate '%s'.",
+ recreated_date, time_formats[i], header_time);
+ continue;
+ }
+ result2 = timegm(&gmt);
+ if (*result != result2)
+ {
+ log_error(LOG_LEVEL_ERROR, "strftime() and strptime() disagree. "
+ "Format: '%s'. In: '%s', out: '%s'. %d != %d. Rejecting.",
+ time_formats[i], header_time, recreated_date, *result, result2);
+ continue;
+ }
+ }
+#endif
+