1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 * $FreeBSD$
21 */
22
23/*
24 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
25 * Use is subject to license terms.
26 */
27
28#pragma ident	"@(#)rename_dir.c	1.1	07/05/25 SMI"
29
30/*
31 * Assertion:
32 * Create two directory trees in zfs filesystem, and rename
33 * directory across the directory structure. ZFS can handle
34 * the race situation.
35 */
36
37/*
38 * Need to create the following directory structures before
39 * running this program:
40 *
41 * mkdir -p 1/2/3/4/5 a/b/c/d/e
42 */
43
44
45#include <stdlib.h>
46#include <unistd.h>
47#include <stdio.h>
48#include <string.h>
49
50int
51main()
52{
53	int i = 1;
54	char buf[256];
55	char *msg = "rename() fails to handle race situation\n";
56
57	switch (fork()) {
58	case -1:
59		perror("fork");
60		exit(1);
61		break;
62	case 0:
63		while (i > 0) {
64			int c_count = 0;
65			if (rename("a/b/c", "1/2/3/c") == 0)
66				c_count++;
67			if (rename("1/2/3/c", "a/b/c") == 0)
68				c_count++;
69			if (c_count) {
70				(void) strlcat(buf, "c_count: %d,", 256);
71				(void) strlcat(buf, msg, 256);
72				(void) fprintf(stderr, buf, c_count);
73			}
74		}
75		break;
76	default:
77		while (i > 0) {
78			int p_count = 0;
79			if (rename("1", "a/b/c/d/e/1") == 0)
80				p_count++;
81			if (rename("a/b/c/d/e/1", "1") == 0)
82				p_count++;
83			if (p_count) {
84				(void) strlcat(buf, "p_count: %d,", 256);
85				(void) strlcat(buf, msg, 256);
86				(void) fprintf(stderr, buf, p_count);
87			}
88		}
89		break;
90	}
91	return (0);
92}
93