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diff --git a/usr.sbin/newsyslog/ptimes.c b/usr.sbin/newsyslog/ptimes.c
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+/*-
+ * ------+---------+---------+---------+---------+---------+---------+---------*
+ * Initial version of parse8601 was originally added to newsyslog.c in
+ * FreeBSD on Jan 22, 1999 by Garrett Wollman <wollman@FreeBSD.org>.
+ * Initial version of parseDWM was originally added to newsyslog.c in
+ * FreeBSD on Apr 4, 2000 by Hellmuth Michaelis <hm@FreeBSD.org>.
+ *
+ * Copyright (c) 2003 - Garance Alistair Drosehn <gad@FreeBSD.org>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation
+ * are those of the authors and should not be interpreted as representing
+ * official policies, either expressed or implied, of the FreeBSD Project.
+ *
+ * ------+---------+---------+---------+---------+---------+---------+---------*
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "extern.h"
+
+/*-
+ * Parse a limited subset of ISO 8601. The specific format is as follows:
+ *
+ * [CC[YY[MM[DD]]]][THH[MM[SS]]] (where `T' is the literal letter)
+ *
+ * We don't accept a timezone specification; missing fields (including timezone)
+ * are defaulted to the current date but time zero.
+ */
+time_t
+parse8601(const char *s, time_t *next_time)
+{
+ char *t;
+ time_t tsecs;
+ struct tm tm, *tmp;
+ long l;
+
+ tmp = localtime(&timenow);
+ tm = *tmp;
+ if (next_time != NULL)
+ *next_time = (time_t)-1;
+
+ tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
+
+ l = strtol(s, &t, 10);
+ if (l < 0 || l >= INT_MAX || (*t != '\0' && *t != 'T'))
+ return (-1);
+
+ /*
+ * Now t points either to the end of the string (if no time was
+ * provided) or to the letter `T' which separates date and time in
+ * ISO 8601. The pointer arithmetic is the same for either case.
+ */
+ switch (t - s) {
+ case 8:
+ tm.tm_year = ((l / 1000000) - 19) * 100;
+ l = l % 1000000;
+ case 6:
+ tm.tm_year -= tm.tm_year % 100;
+ tm.tm_year += l / 10000;
+ l = l % 10000;
+ case 4:
+ tm.tm_mon = (l / 100) - 1;
+ l = l % 100;
+ case 2:
+ tm.tm_mday = l;
+ case 0:
+ break;
+ default:
+ return (-1);
+ }
+
+ /* sanity check */
+ if (tm.tm_year < 70 || tm.tm_mon < 0 || tm.tm_mon > 12
+ || tm.tm_mday < 1 || tm.tm_mday > 31)
+ return (-1);
+
+ if (*t != '\0') {
+ s = ++t;
+ l = strtol(s, &t, 10);
+ if (l < 0 || l >= INT_MAX || (*t != '\0' && !isspace(*t)))
+ return (-1);
+
+ switch (t - s) {
+ case 6:
+ tm.tm_sec = l % 100;
+ l /= 100;
+ case 4:
+ tm.tm_min = l % 100;
+ l /= 100;
+ case 2:
+ tm.tm_hour = l;
+ case 0:
+ break;
+ default:
+ return (-1);
+ }
+
+ /* sanity check */
+ if (tm.tm_sec < 0 || tm.tm_sec > 60 || tm.tm_min < 0
+ || tm.tm_min > 59 || tm.tm_hour < 0 || tm.tm_hour > 23)
+ return (-1);
+ }
+
+ tsecs = mktime(&tm);
+ /*
+ * Check for invalid times, including things like the missing
+ * hour when switching from "standard time" to "daylight saving".
+ */
+ if (tsecs == (time_t)-1)
+ tsecs = (time_t)-2;
+ return (tsecs);
+}
+
+/*-
+ * Parse a cyclic time specification, the format is as follows:
+ *
+ * [Dhh] or [Wd[Dhh]] or [Mdd[Dhh]]
+ *
+ * to rotate a logfile cyclic at
+ *
+ * - every day (D) within a specific hour (hh) (hh = 0...23)
+ * - once a week (W) at a specific day (d) OR (d = 0..6, 0 = Sunday)
+ * - once a month (M) at a specific day (d) (d = 1..31,l|L)
+ *
+ * We don't accept a timezone specification; missing fields
+ * are defaulted to the current date but time zero.
+ */
+time_t
+parseDWM(char *s, time_t *next_time)
+{
+ char *t;
+ time_t tsecs;
+ struct tm tm, *tmp;
+ long l;
+ int nd;
+ static int mtab[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+ int WMseen = 0;
+ int Dseen = 0;
+
+ tmp = localtime(&timenow);
+ tm = *tmp;
+ if (next_time != NULL)
+ *next_time = (time_t)-1;
+
+ /* set no. of days per month */
+
+ nd = mtab[tm.tm_mon];
+
+ if (tm.tm_mon == 1) {
+ if (((tm.tm_year + 1900) % 4 == 0) &&
+ ((tm.tm_year + 1900) % 100 != 0) &&
+ ((tm.tm_year + 1900) % 400 == 0)) {
+ nd++; /* leap year, 29 days in february */
+ }
+ }
+ tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
+
+ for (;;) {
+ switch (*s) {
+ case 'D':
+ if (Dseen)
+ return (-1);
+ Dseen++;
+ s++;
+ l = strtol(s, &t, 10);
+ if (l < 0 || l > 23)
+ return (-1);
+ tm.tm_hour = l;
+ break;
+
+ case 'W':
+ if (WMseen)
+ return (-1);
+ WMseen++;
+ s++;
+ l = strtol(s, &t, 10);
+ if (l < 0 || l > 6)
+ return (-1);
+ if (l != tm.tm_wday) {
+ int save;
+
+ if (l < tm.tm_wday) {
+ save = 6 - tm.tm_wday;
+ save += (l + 1);
+ } else {
+ save = l - tm.tm_wday;
+ }
+
+ tm.tm_mday += save;
+
+ if (tm.tm_mday > nd) {
+ tm.tm_mon++;
+ tm.tm_mday = tm.tm_mday - nd;
+ }
+ }
+ break;
+
+ case 'M':
+ if (WMseen)
+ return (-1);
+ WMseen++;
+ s++;
+ if (tolower(*s) == 'l') {
+ tm.tm_mday = nd;
+ s++;
+ t = s;
+ } else {
+ l = strtol(s, &t, 10);
+ if (l < 1 || l > 31)
+ return (-1);
+
+ if (l > nd)
+ return (-1);
+ tm.tm_mday = l;
+ }
+ break;
+
+ default:
+ return (-1);
+ break;
+ }
+
+ if (*t == '\0' || isspace(*t))
+ break;
+ else
+ s = t;
+ }
+
+ tsecs = mktime(&tm);
+ /*
+ * Check for invalid times, including things like the missing
+ * hour when switching from "standard time" to "daylight saving".
+ */
+ if (tsecs == (time_t)-1)
+ tsecs = (time_t)-2;
+ return (tsecs);
+}
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