t_truncate.c revision 314817 
1/* $NetBSD: t_truncate.c,v 1.3 2017/01/13 20:03:51 christos Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
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#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_truncate.c,v 1.3 2017/01/13 20:03:51 christos Exp $");
33
34#include <sys/stat.h>
35
36#include <atf-c.h>
37#include <errno.h>
38#include <fcntl.h>
39#include <limits.h>
40#include <stdio.h>
41#include <string.h>
42#include <unistd.h>
43
44static const char path[] = "truncate";
45static const size_t sizes[] = { 8, 16, 512, 1024, 2048, 4094, 3000, 30 };
46
47ATF_TC_WITH_CLEANUP(ftruncate_basic);
48ATF_TC_HEAD(ftruncate_basic, tc)
49{
50	atf_tc_set_md_var(tc, "descr", "A basic test of ftruncate(2)");
51}
52
53ATF_TC_BODY(ftruncate_basic, tc)
54{
55	struct stat st;
56	size_t i;
57	int fd;
58
59	fd = open(path, O_RDWR | O_CREAT, 0600);
60	ATF_REQUIRE(fd >= 0);
61
62	for (i = 0; i < __arraycount(sizes); i++) {
63
64		(void)memset(&st, 0, sizeof(struct stat));
65
66		ATF_REQUIRE(ftruncate(fd, sizes[i]) == 0);
67		ATF_REQUIRE(fstat(fd, &st) == 0);
68
69		(void)fprintf(stderr, "truncating to %zu bytes\n", sizes[i]);
70
71		if (sizes[i] != (size_t)st.st_size)
72			atf_tc_fail("ftruncate(2) did not truncate");
73	}
74
75	(void)close(fd);
76	(void)unlink(path);
77}
78
79ATF_TC_CLEANUP(ftruncate_basic, tc)
80{
81	(void)unlink(path);
82}
83
84ATF_TC(ftruncate_err);
85ATF_TC_HEAD(ftruncate_err, tc)
86{
87	atf_tc_set_md_var(tc, "descr", "Test errors from ftruncate(2)");
88	atf_tc_set_md_var(tc, "require.user", "unprivileged");
89}
90
91ATF_TC_BODY(ftruncate_err, tc)
92{
93	int fd;
94
95	fd = open("/etc/passwd", O_RDONLY, 0400);
96	ATF_REQUIRE(fd >= 0);
97
98	errno = 0;
99	ATF_REQUIRE_ERRNO(EBADF, ftruncate(-1, 999) == -1);
100
101	errno = 0;
102	ATF_REQUIRE_ERRNO(EINVAL, ftruncate(fd, 999) == -1);
103
104	(void)close(fd);
105}
106
107ATF_TC_WITH_CLEANUP(truncate_basic);
108ATF_TC_HEAD(truncate_basic, tc)
109{
110	atf_tc_set_md_var(tc, "descr", "A basic test of truncate(2)");
111}
112
113ATF_TC_BODY(truncate_basic, tc)
114{
115	struct stat st;
116	size_t i;
117	int fd;
118
119	fd = open(path, O_RDWR | O_CREAT, 0600);
120	ATF_REQUIRE(fd >= 0);
121
122	for (i = 0; i < __arraycount(sizes); i++) {
123
124		(void)memset(&st, 0, sizeof(struct stat));
125
126		ATF_REQUIRE(truncate(path, sizes[i]) == 0);
127		ATF_REQUIRE(fstat(fd, &st) == 0);
128
129		(void)fprintf(stderr, "truncating to %zu bytes\n", sizes[i]);
130
131		if (sizes[i] != (size_t)st.st_size)
132			atf_tc_fail("truncate(2) did not truncate");
133	}
134
135	(void)close(fd);
136	(void)unlink(path);
137}
138
139ATF_TC_CLEANUP(truncate_basic, tc)
140{
141	(void)unlink(path);
142}
143
144ATF_TC(truncate_err);
145ATF_TC_HEAD(truncate_err, tc)
146{
147	atf_tc_set_md_var(tc, "descr", "Test errors from truncate(2)");
148	atf_tc_set_md_var(tc, "require.user", "unprivileged");
149}
150
151ATF_TC_BODY(truncate_err, tc)
152{
153	char buf[PATH_MAX];
154
155	errno = 0;
156	ATF_REQUIRE_ERRNO(EFAULT, truncate((void *)-1, 999) == -1);
157
158	errno = 0;
159	ATF_REQUIRE_ERRNO(EISDIR, truncate("/etc", 999) == -1);
160
161	errno = 0;
162	ATF_REQUIRE_ERRNO(ENOENT, truncate("/a/b/c/d/e/f/g", 999) == -1);
163
164	errno = 0;
165	snprintf(buf, sizeof(buf), "%s/truncate_test.root_owned",
166	    atf_tc_get_config_var(tc, "srcdir"));
167	ATF_REQUIRE_ERRNO(EACCES, truncate(buf, 999) == -1);
168}
169
170ATF_TP_ADD_TCS(tp)
171{
172
173	ATF_TP_ADD_TC(tp, ftruncate_basic);
174	ATF_TP_ADD_TC(tp, ftruncate_err);
175	ATF_TP_ADD_TC(tp, truncate_basic);
176	ATF_TP_ADD_TC(tp, truncate_err);
177
178	return atf_no_error();
179}
180