1 /* $NetBSD: t_write.c,v 1.3 2017/01/13 19:27:23 christos Exp $ */
4 * Copyright (c) 2001, 2008 The NetBSD Foundation, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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.
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 1.3 2017/01/13 19:27:23 christos Exp $");
46 static void sighandler(int);
48 static bool fail = false;
49 static const char *path = "write";
52 sighandler(int signo __unused)
57 ATF_TC_WITH_CLEANUP(write_err);
58 ATF_TC_HEAD(write_err, tc)
60 atf_tc_set_md_var(tc, "descr", "Checks errors from write(2)");
63 ATF_TC_BODY(write_err, tc)
65 char rbuf[3] = { 'a', 'b', 'c' };
66 char wbuf[3] = { 'x', 'y', 'z' };
70 ATF_REQUIRE_ERRNO(EBADF, write(-1, wbuf, sizeof(wbuf)) == -1);
72 fd = open(path, O_RDWR | O_CREAT);
77 ATF_REQUIRE_ERRNO(0, write(fd, wbuf, 3) == 3);
80 ATF_REQUIRE_ERRNO(EINVAL, write(fd, wbuf, SIZE_MAX) == -1);
83 ATF_REQUIRE_ERRNO(EFAULT, write(fd, (void *)-1, 1) == -1);
86 * Check that the above bogus write(2)
87 * calls did not corrupt the file.
89 ATF_REQUIRE(lseek(fd, 0, SEEK_SET) == 0);
90 ATF_REQUIRE(read(fd, rbuf, 3) == 3);
91 ATF_REQUIRE(memcmp(rbuf, wbuf, 3) == 0);
98 ATF_TC_CLEANUP(write_err, tc)
104 ATF_TC_HEAD(write_pipe, tc)
106 atf_tc_set_md_var(tc, "descr", "Checks for EPIPE from write(2)");
109 ATF_TC_BODY(write_pipe, tc)
113 ATF_REQUIRE(pipe(fds) == 0);
114 ATF_REQUIRE(signal(SIGPIPE, sighandler) == 0);
116 ATF_REQUIRE(write(fds[1], "x", 1) != -1);
117 ATF_REQUIRE(close(fds[0]) == 0);
122 if (write(fds[1], "x", 1) != -1 || errno != EPIPE)
123 atf_tc_fail_nonfatal("expected EPIPE but write(2) succeeded");
125 ATF_REQUIRE(close(fds[1]) == 0);
128 atf_tc_fail_nonfatal("SIGPIPE was not raised");
131 ATF_TC_WITH_CLEANUP(write_pos);
132 ATF_TC_HEAD(write_pos, tc)
134 atf_tc_set_md_var(tc, "descr", "Checks that write(2) "
135 "updates the file position");
138 ATF_TC_BODY(write_pos, tc)
140 const size_t n = 123;
144 fd = open(path, O_RDWR | O_CREAT);
145 ATF_REQUIRE(fd >= 0);
147 for (i = 0; i < n; i++) {
148 ATF_REQUIRE(write(fd, "x", 1) == 1);
149 ATF_REQUIRE(lseek(fd, 0, SEEK_CUR) == (off_t)(i + 1));
152 ATF_REQUIRE(close(fd) == 0);
153 ATF_REQUIRE(unlink(path) == 0);
156 ATF_TC_CLEANUP(write_pos, tc)
161 ATF_TC_WITH_CLEANUP(write_ret);
162 ATF_TC_HEAD(write_ret, tc)
164 atf_tc_set_md_var(tc, "descr", "Checks return values from write(2)");
167 ATF_TC_BODY(write_ret, tc)
174 fd = open(path, O_WRONLY | O_CREAT);
175 ATF_REQUIRE(fd >= 0);
177 (void)memset(buf, 'x', sizeof(buf));
179 for (i = j = 0; i < n; i++)
180 j += write(fd, buf, sizeof(buf));
183 atf_tc_fail("inconsistent return values from write(2)");
189 ATF_TC_CLEANUP(write_ret, tc)
194 ATF_TC(writev_iovmax);
195 ATF_TC_HEAD(writev_iovmax, tc)
197 atf_tc_set_md_var(tc, "timeout", "10");
198 atf_tc_set_md_var(tc, "descr",
199 "Checks that file descriptor is properly FILE_UNUSE()d "
200 "when iovcnt is greater than IOV_MAX");
203 ATF_TC_BODY(writev_iovmax, tc)
207 (void)printf("Calling writev(2, NULL, IOV_MAX + 1)...\n");
210 retval = writev(2, NULL, IOV_MAX + 1);
212 ATF_REQUIRE_EQ_MSG(retval, -1, "got: %zd", retval);
213 ATF_REQUIRE_EQ_MSG(errno, EINVAL, "got: %s", strerror(errno));
219 ATF_TP_ADD_TC(tp, write_err);
220 ATF_TP_ADD_TC(tp, write_pipe);
221 ATF_TP_ADD_TC(tp, write_pos);
222 ATF_TP_ADD_TC(tp, write_ret);
223 ATF_TP_ADD_TC(tp, writev_iovmax);
225 return atf_no_error();