New program that creates a broken lyskomd config file with timeval

overflows.

src/server/testsuite/timeval-overflow.c

+/*
+ * Emit a lyskomd that causes a struct timeval to overflow.
+ * Copyright (C) 2003  Lysator Academic Computer Association.
+ *
+ * This file is part of the LysKOM server.
+ * 
+ * LysKOM 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 1, or (at your option) 
+ * any later version.
+ * 
+ * LysKOM 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 LysKOM; see the file COPYING.  If not, write to
+ * Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
+ * or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, 
+ * MA 02139, USA.
+ *
+ * Please mail bug reports to bug-lyskom@lysator.liu.se. 
+ */
+
+#include <limits.h>
+#include <stdio.h>
+#include <sys/types.h>
+
+int
+main(void)
+{
+    struct timeval tv;
+    struct timeval next;
+
+    tv.tv_sec = ~0;
+    if (tv.tv_sec < 0)
+    {
+	for (next.tv_sec = 0; ; next.tv_sec = 2 * next.tv_sec + 1)
+	{
+	    if (next.tv_sec < 0)
+		break;
+	    tv = next;
+	}
+    }
+
+    /* No overflow. */
+    printf("Garb busy postponement: %f seconds\n", (double)tv.tv_sec);
+
+    /* Overflow. */
+    printf("Garb timeout: %f seconds\n", 1.5 * (double)tv.tv_sec);
+
+    /* Overflow. */
+    printf("Sync timeout: %f seconds\n", 1.1 * (double)tv.tv_sec);
+    
+    /* Overflow. */
+    printf("Garb interval: %f days\n", (double)tv.tv_sec / 24.0 / 3599.0);
+    
+    /* No overflow. */
+    printf("Sync interval: %f days\n", (double)tv.tv_sec / 24.0 / 3601.0);
+    
+    /* Overflow. */
+    printf("Sync retry interval: %f us\n", 1.001e6 * tv.tv_sec);
+
+    return 0;
+}