1 files changed, 70 insertions, 0 deletions
diff --git a/test/time/tst-mktime.c b/test/time/tst-mktime.c
new file mode 100644
index 000000000..416a85616
--- /dev/null
+++ b/test/time/tst-mktime.c
@@ -0,0 +1,70 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+int
+main (void)
+{
+  struct tm time_str, *tm;
+  time_t t;
+  char daybuf[20];
+  int result;
+
+  time_str.tm_year = 2001 - 1900;
+  time_str.tm_mon = 7 - 1;
+  time_str.tm_mday = 4;
+  time_str.tm_hour = 0;
+  time_str.tm_min = 0;
+  time_str.tm_sec = 1;
+  time_str.tm_isdst = -1;
+
+  if (mktime (&time_str) == -1)
+    {
+      (void) puts ("-unknown-");
+      result = 1;
+    }
+  else
+    {
+      (void) strftime (daybuf, sizeof (daybuf), "%A", &time_str);
+      (void) puts (daybuf);
+      result = strcmp (daybuf, "Wednesday") != 0;
+    }
+
+  setenv ("TZ", "EST+5", 1);
+#define EVENING69 1 * 60 * 60 + 2 * 60 + 29
+  t = EVENING69;
+  tm = localtime (&t);
+  if (tm == NULL)
+    {
+      (void) puts ("localtime returned NULL");
+      result = 1;
+    }
+  else
+    {
+      time_str = *tm;
+      t = mktime (&time_str);
+      if (t != EVENING69)
+        {
+          printf ("mktime returned %ld, expected %d\n",
+		  (long) t, EVENING69);
+	  result = 1;
+        }
+      else
+        (void) puts ("Dec 31 1969 EST test passed");
+
+      setenv ("TZ", "CET-1", 1);
+      t = mktime (&time_str);
+#define EVENING69_CET (EVENING69 - (5 - -1) * 60 * 60)
+      if (t != EVENING69_CET)
+        {
+	  printf ("mktime returned %ld, expected %ld\n",
+		  (long) t, (long) EVENING69_CET);
+	  result = 1;
+        }
+      else
+        (void) puts ("Dec 31 1969 CET test passed");
+    }
+
+  return result;
+}