pipe: be robust in face of closed fds

[gnulib.git] / lib / mktime.c

diff --git a/lib/mktime.c b/lib/mktime.c
index a91fb20..f9e7b60 100644 (file)
--- a/lib/mktime.c
+++ b/lib/mktime.c
@@ -290,7 +290,9 @@ __mktime_internal (struct tm *tp,
   int mday = tp->tm_mday;
   int mon = tp->tm_mon;
   int year_requested = tp->tm_year;
-  int isdst = tp->tm_isdst;
+  /* Normalize the value.  */
+  int isdst = ((tp->tm_isdst >> (8 * sizeof (tp->tm_isdst) - 1))
+              | (tp->tm_isdst != 0));
 
   /* 1 if the previous probe was DST.  */
   int dst2;