1/* $NetBSD: t_write.c,v 1.2 2011/10/19 16:19:30 jruoho Exp $ */
2
3/*-
4 * Copyright (c) 2001, 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__COPYRIGHT("@(#) Copyright (c) 2008\
31 The NetBSD Foundation, inc. All rights reserved.");
32__RCSID("$NetBSD: t_write.c,v 1.2 2011/10/19 16:19:30 jruoho Exp $");
33
34#include <sys/uio.h>
35#ifdef __NetBSD__
36#include <sys/syslimits.h>
37#endif
38
39#include <atf-c.h>
40#include <errno.h>
41#include <fcntl.h>
42#include <signal.h>
43#include <stdio.h>
44#include <stdint.h>
45#include <string.h>
46#include <unistd.h>
47
48#ifdef __FreeBSD__
49#include <limits.h>
50#endif
51
52static void		 sighandler(int);
53
54static bool		 fail = false;
55static const char	*path = "write";
56
57static void
58#ifdef __FreeBSD__
59sighandler(int signo __unused)
60#else
61sighandler(int signo)
62#endif
63{
64	fail = false;
65}
66
67ATF_TC_WITH_CLEANUP(write_err);
68ATF_TC_HEAD(write_err, tc)
69{
70	atf_tc_set_md_var(tc, "descr", "Checks errors from write(2)");
71}
72
73ATF_TC_BODY(write_err, tc)
74{
75	char rbuf[3] = { 'a', 'b', 'c' };
76	char wbuf[3] = { 'x', 'y', 'z' };
77	int fd;
78
79	errno = 0;
80	ATF_REQUIRE_ERRNO(EBADF, write(-1, wbuf, sizeof(wbuf)) == -1);
81
82	fd = open(path, O_RDWR | O_CREAT);
83
84	if (fd >= 0) {
85
86		errno = 0;
87		ATF_REQUIRE_ERRNO(0, write(fd, wbuf, 3) == 3);
88
89		errno = 0;
90		ATF_REQUIRE_ERRNO(EINVAL, write(fd, wbuf, SIZE_MAX) == -1);
91
92		errno = 0;
93		ATF_REQUIRE_ERRNO(EFAULT, write(fd, (void *)-1, 1) == -1);
94
95		/*
96		 * Check that the above bogus write(2)
97		 * calls did not corrupt the file.
98		 */
99		ATF_REQUIRE(lseek(fd, 0, SEEK_SET) == 0);
100		ATF_REQUIRE(read(fd, rbuf, 3) == 3);
101		ATF_REQUIRE(memcmp(rbuf, wbuf, 3) == 0);
102
103		(void)close(fd);
104		(void)unlink(path);
105	}
106}
107
108ATF_TC_CLEANUP(write_err, tc)
109{
110	(void)unlink(path);
111}
112
113ATF_TC(write_pipe);
114ATF_TC_HEAD(write_pipe, tc)
115{
116	atf_tc_set_md_var(tc, "descr", "Checks for EPIPE from write(2)");
117}
118
119ATF_TC_BODY(write_pipe, tc)
120{
121	int fds[2];
122
123	ATF_REQUIRE(pipe(fds) == 0);
124	ATF_REQUIRE(signal(SIGPIPE, sighandler) == 0);
125
126	ATF_REQUIRE(write(fds[1], "x", 1) != -1);
127	ATF_REQUIRE(close(fds[0]) == 0);
128
129	errno = 0;
130	fail = true;
131
132	if (write(fds[1], "x", 1) != -1 || errno != EPIPE)
133		atf_tc_fail_nonfatal("expected EPIPE but write(2) succeeded");
134
135	ATF_REQUIRE(close(fds[1]) == 0);
136
137	if (fail != false)
138		atf_tc_fail_nonfatal("SIGPIPE was not raised");
139}
140
141ATF_TC_WITH_CLEANUP(write_pos);
142ATF_TC_HEAD(write_pos, tc)
143{
144	atf_tc_set_md_var(tc, "descr", "Checks that write(2) "
145	    "updates the file position");
146}
147
148ATF_TC_BODY(write_pos, tc)
149{
150	const size_t n = 123;
151	size_t i;
152	int fd;
153
154	fd = open(path, O_RDWR | O_CREAT);
155	ATF_REQUIRE(fd >= 0);
156
157	for (i = 0; i < n; i++) {
158		ATF_REQUIRE(write(fd, "x", 1) == 1);
159		ATF_REQUIRE(lseek(fd, 0, SEEK_CUR) == (off_t)(i + 1));
160	}
161
162	ATF_REQUIRE(close(fd) == 0);
163	ATF_REQUIRE(unlink(path) == 0);
164}
165
166ATF_TC_CLEANUP(write_pos, tc)
167{
168	(void)unlink(path);
169}
170
171ATF_TC_WITH_CLEANUP(write_ret);
172ATF_TC_HEAD(write_ret, tc)
173{
174	atf_tc_set_md_var(tc, "descr", "Checks return values from write(2)");
175}
176
177ATF_TC_BODY(write_ret, tc)
178{
179	const size_t n = 99;
180	char buf[123];
181	size_t i, j;
182	int fd;
183
184	fd = open(path, O_WRONLY | O_CREAT);
185	ATF_REQUIRE(fd >= 0);
186
187	(void)memset(buf, 'x', sizeof(buf));
188
189	for (i = j = 0; i < n; i++)
190		j += write(fd, buf, sizeof(buf));
191
192	if (j != n * 123)
193		atf_tc_fail("inconsistent return values from write(2)");
194
195	(void)close(fd);
196	(void)unlink(path);
197}
198
199ATF_TC_CLEANUP(write_ret, tc)
200{
201	(void)unlink(path);
202}
203
204ATF_TC(writev_iovmax);
205ATF_TC_HEAD(writev_iovmax, tc)
206{
207	atf_tc_set_md_var(tc, "timeout", "10");
208	atf_tc_set_md_var(tc, "descr",
209	    "Checks that file descriptor is properly FILE_UNUSE()d "
210	    "when iovcnt is greater than IOV_MAX");
211}
212
213ATF_TC_BODY(writev_iovmax, tc)
214{
215	ssize_t retval;
216
217	(void)printf("Calling writev(2, NULL, IOV_MAX + 1)...\n");
218
219	errno = 0;
220	retval = writev(2, NULL, IOV_MAX + 1);
221
222	ATF_REQUIRE_EQ_MSG(retval, -1, "got: %zd", retval);
223	ATF_REQUIRE_EQ_MSG(errno, EINVAL, "got: %s", strerror(errno));
224}
225
226ATF_TP_ADD_TCS(tp)
227{
228
229	ATF_TP_ADD_TC(tp, write_err);
230	ATF_TP_ADD_TC(tp, write_pipe);
231	ATF_TP_ADD_TC(tp, write_pos);
232	ATF_TP_ADD_TC(tp, write_ret);
233	ATF_TP_ADD_TC(tp, writev_iovmax);
234
235	return atf_no_error();
236}
237