Fixed w3c to unix timestamp conversion for FreeBSD

Thanks to Göran Löwkrantz for pointing both to the problem and possible
solution.

Signed-off-by: Michael Krelin <hacker@klever.net>

1 files changed, 18 insertions, 3 deletions

diff --git a/lib/util.cc b/lib/util.cc
index d979502..a46ba2a 100644
--- a/lib/util.cc
+++ b/lib/util.cc
@@ -122,6 +122,21 @@ namespace opkele {
             return rv;
         }
 
+#ifndef HAVE_TIMEGM
+        static time_t timegm(struct tm *t) {
+            char *tz = getenv("TZ");
+            setenv("TZ","",1); tzset();
+            time_t rv = mktime(t);
+            if(tz)
+                setenv("TZ",tz,1);
+            else
+                unsetenv("TZ");
+            tzset();
+            return rv;
+        }
+        #define timegm opkele::util::timegm
+#endif /* HAVE_TIMEGM */
+
         time_t w3c_to_time(const string& w) {
             int fraction;
             struct tm tm_t;
@@ -145,10 +160,10 @@ namespace opkele {
                 throw failed_conversion(OPKELE_CP_ "failed to sscanf()");
             tm_t.tm_mon--;
             tm_t.tm_year-=1900;
-            time_t rv = mktime(&tm_t);
+            time_t rv = timegm(&tm_t);
             if(rv==(time_t)-1)
-                throw failed_conversion(OPKELE_CP_ "failed to mktime()");
-            return rv-timezone;
+                throw failed_conversion(OPKELE_CP_ "failed to gmtime()");
+            return rv;
         }
 
         /*