xref: /freebsd/contrib/netbsd-tests/lib/libc/sys/t_write.c (revision 0e97acdf58fe27b09c4824a474b0344daf997c5f)
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 #if defined(__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 #if defined(__FreeBSD__)
49 #include <limits.h>
50 #endif
51 
52 static void		 sighandler(int);
53 
54 static bool		 fail = false;
55 static const char	*path = "write";
56 
57 static void
58 #if defined(__FreeBSD__)
59 sighandler(int signo __unused)
60 #else
61 sighandler(int signo)
62 #endif
63 {
64 	fail = false;
65 }
66 
67 ATF_TC_WITH_CLEANUP(write_err);
68 ATF_TC_HEAD(write_err, tc)
69 {
70 	atf_tc_set_md_var(tc, "descr", "Checks errors from write(2)");
71 }
72 
73 ATF_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 
108 ATF_TC_CLEANUP(write_err, tc)
109 {
110 	(void)unlink(path);
111 }
112 
113 ATF_TC(write_pipe);
114 ATF_TC_HEAD(write_pipe, tc)
115 {
116 	atf_tc_set_md_var(tc, "descr", "Checks for EPIPE from write(2)");
117 }
118 
119 ATF_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 
141 ATF_TC_WITH_CLEANUP(write_pos);
142 ATF_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 
148 ATF_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 
166 ATF_TC_CLEANUP(write_pos, tc)
167 {
168 	(void)unlink(path);
169 }
170 
171 ATF_TC_WITH_CLEANUP(write_ret);
172 ATF_TC_HEAD(write_ret, tc)
173 {
174 	atf_tc_set_md_var(tc, "descr", "Checks return values from write(2)");
175 }
176 
177 ATF_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 
199 ATF_TC_CLEANUP(write_ret, tc)
200 {
201 	(void)unlink(path);
202 }
203 
204 ATF_TC(writev_iovmax);
205 ATF_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 
213 ATF_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 
226 ATF_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