t_dir.c revision 1.1 
1/* $NetBSD: t_dir.c,v 1.1 2010/12/28 12:46:15 pgoyette Exp $ */
2
3/*-
4 * Copyright (c) 2010 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <atf-c.h>
33
34#include <assert.h>
35#include <dirent.h>
36#include <err.h>
37#include <fcntl.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <unistd.h>
42
43#include <sys/stat.h>
44
45ATF_TC(seekdir);
46
47ATF_TC_HEAD(seekdir, tc)
48{
49
50	atf_tc_set_md_var(tc, "descr",
51	    "Check telldir(3) and seekdir(3) for correct behavior (PR/24324)");
52}
53
54ATF_TC_BODY(seekdir, tc)
55{
56	DIR *dp;
57	char *wasname;
58	struct dirent *entry;
59	long here;
60
61	mkdir("t", 0755);
62	creat("t/a", 0600);
63	creat("t/b", 0600);
64	creat("t/c", 0600);
65
66	dp = opendir("t");
67	if ( dp == NULL)
68		atf_tc_fail("Could not open temp directory.");
69
70	/* skip two for . and .. */
71	entry = readdir(dp);
72	entry = readdir(dp);
73
74	/* get first entry */
75	entry = readdir(dp);
76	here = telldir(dp);
77
78	/* get second entry */
79	entry = readdir(dp);
80	wasname = strdup(entry->d_name);
81
82	/* get third entry */
83	entry = readdir(dp);
84
85	/* try to return to the position after the first entry */
86	seekdir(dp, here);
87	entry = readdir(dp);
88
89	if (strcmp(entry->d_name, wasname) != 0)
90		atf_tc_fail("1st seekdir found wrong name");
91
92	/* try again, and throw in a telldir() for good measure */
93	seekdir(dp, here);
94	here = telldir(dp);
95	entry = readdir(dp);
96
97	if (strcmp(entry->d_name, wasname) != 0)
98		atf_tc_fail("2nd seekdir found wrong name");
99
100	/* One more time, to make sure that telldir() doesn't affect result */
101	seekdir(dp, here);
102	entry = readdir(dp);
103
104	if (strcmp(entry->d_name, wasname) != 0)
105		atf_tc_fail("3rd seekdir found wrong name");
106
107	closedir(dp);
108}
109
110ATF_TC(telldir_leak);
111
112ATF_TC_HEAD(telldir_leak, tc)
113{
114
115	atf_tc_set_md_var(tc, "descr",
116	    "Check telldir(3) for memory leakage (PR/24324)");
117}
118
119ATF_TC_BODY(telldir_leak, tc)
120{
121	DIR *dp;
122	long loc;
123	char *memused;
124	int i;
125	int oktouse = 4096;
126
127	dp = opendir(".");
128	if (dp == NULL)
129		atf_tc_fail("Could not open current directory");
130
131	loc = telldir(dp);
132	memused = sbrk(0);
133	closedir(dp);
134
135	for (i=0; i<1000; i++) {
136		dp = opendir(".");
137		if (dp == NULL)
138			atf_tc_fail("Could not open current directory");
139
140		loc = telldir(dp);
141		closedir(dp);
142
143		if ((char *)(sbrk(0)) - memused > oktouse) {
144			(void)printf("Used %td extra bytes for %d telldir "
145			    "calls", ((char *)(sbrk(0)) - memused), i);
146			oktouse = (char *)(sbrk(0)) - memused;
147		}
148	}
149	if (oktouse > 4096) {
150		atf_tc_fail("Failure: leaked %td bytes", oktouse);
151	} else {
152		(void)printf("OK: used %td bytes\n", (char *)(sbrk(0))-memused);
153	}
154}
155
156ATF_TP_ADD_TCS(tp)
157{
158
159	ATF_TP_ADD_TC(tp, seekdir);
160	ATF_TP_ADD_TC(tp, telldir_leak);
161
162	return atf_no_error();
163}
164