From ec81b4c98b2568891eb0a4113efaadcd41abc792 Mon Sep 17 00:00:00 2001
From: Adam Sutton <dev@adamsutton.me.uk>
Date: Mon, 21 Apr 2014 14:46:31 +0100
Subject: [PATCH] util cron: fix possible DST issue

really not sure this will work, needs testing
---
 src/cron.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/cron.c b/src/cron.c
index 0dbcbbfd..325ff6d1 100644
--- a/src/cron.c
+++ b/src/cron.c
@@ -181,11 +181,14 @@ days_in_month ( int year, int mon )
 int
 cron_next ( cron_t *c, const time_t now, time_t *ret )
 {
-  struct tm nxt;
+  struct tm nxt, tmp;
   int endyear; 
   localtime_r(&now, &nxt);
   endyear = nxt.tm_year + 10;
 
+  /* Clear seconds */
+  nxt.tm_sec = 0;
+
   /* Invalid day */
   if (!(c->c_mday & (0x1LL << (nxt.tm_mday-1))) ||
       !(c->c_wday & (0x1LL << (nxt.tm_wday)))   ||
@@ -267,8 +270,9 @@ cron_next ( cron_t *c, const time_t now, time_t *ret )
   }
 
   /* Create time */
-  // TODO: not sure this will provide the correct time with respect to DST!
-  nxt.tm_isdst = 0;
+  memcpy(&tmp, &nxt, sizeof(tmp));
+  mktime(&tmp);
+  nxt.tm_isdst = tmp.tm_isdst;
   *ret         = mktime(&nxt);
   return 0;
 }