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-rw-r--r--tests/test-gettimeofday.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/tests/test-gettimeofday.c b/tests/test-gettimeofday.c
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+++ b/tests/test-gettimeofday.c
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+/*
+ * Copyright (C) 2005, 2007, 2009-2022 Free Software Foundation, Inc.
+ * Written by Jim Meyering.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include <sys/time.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (gettimeofday, int,
+ (struct timeval *, GETTIMEOFDAY_TIMEZONE *));
+
+#include <time.h>
+
+#include <stdio.h>
+#include <string.h>
+
+int
+main (void)
+{
+ time_t t = 0;
+ struct tm *lt;
+ struct tm saved_lt;
+ struct timeval tv;
+ lt = localtime (&t);
+ saved_lt = *lt;
+ gettimeofday (&tv, NULL);
+ if (memcmp (lt, &saved_lt, sizeof (struct tm)) != 0)
+ {
+ fprintf (stderr, "gettimeofday still clobbers the localtime buffer!\n");
+ return 1;
+ }
+ return 0;
+}