1 /* $NetBSD: t_dup.c,v 1.9 2017/01/13 20:31:53 christos Exp $ */
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
31 #include <sys/cdefs.h>
32 __RCSID("$NetBSD: t_dup.c,v 1.9 2017/01/13 20:31:53 christos Exp $");
34 #include <sys/resource.h>
49 static char path[] = "dup";
51 static void check_mode(bool, bool, bool);
55 check_mode(bool _dup, bool _dup2, bool _dup3)
57 int mode[3] = { O_RDONLY, O_WRONLY, O_RDWR };
58 int perm[5] = { 0700, 0400, 0600, 0444, 0666 };
64 * Check that a duplicated descriptor
65 * retains the mode of the original file.
67 for (i = 0; i < __arraycount(mode); i++) {
69 for (j = 0; j < __arraycount(perm); j++) {
71 fd1 = open(path, mode[i] | O_CREAT, perm[j]);
72 fd2 = open("/etc/passwd", O_RDONLY);
74 ATF_REQUIRE(fd1 >= 0);
75 ATF_REQUIRE(fd2 >= 0);
79 else if (_dup2 != false)
81 else if (_dup3 != false)
82 fd = dup3(fd1, fd2, O_CLOEXEC);
89 (void)memset(&st, 0, sizeof(struct stat));
90 (void)memset(&st1, 0, sizeof(struct stat));
92 ATF_REQUIRE(fstat(fd, &st) == 0);
93 ATF_REQUIRE(fstat(fd1, &st1) == 0);
95 if (st.st_mode != st1.st_mode)
96 atf_tc_fail("invalid mode");
107 ATF_TC_HEAD(dup2_basic, tc)
109 atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)");
112 ATF_TC_BODY(dup2_basic, tc)
116 fd1 = open("/etc/passwd", O_RDONLY);
117 fd2 = open("/etc/passwd", O_RDONLY);
119 ATF_REQUIRE(fd1 >= 0);
120 ATF_REQUIRE(fd2 >= 0);
123 ATF_REQUIRE(fd >= 0);
126 atf_tc_fail("invalid descriptor");
131 ATF_REQUIRE(close(fd2) != 0);
135 ATF_TC_HEAD(dup2_err, tc)
137 atf_tc_set_md_var(tc, "descr", "Test error conditions of dup2(2)");
140 ATF_TC_BODY(dup2_err, tc)
144 fd = open("/etc/passwd", O_RDONLY);
145 ATF_REQUIRE(fd >= 0);
148 ATF_REQUIRE_ERRNO(EBADF, dup2(-1, -1) == -1);
151 ATF_REQUIRE_ERRNO(EBADF, dup2(fd, -1) == -1);
154 ATF_REQUIRE_ERRNO(EBADF, dup2(-1, fd) == -1);
157 * Note that this should not fail with EINVAL.
159 ATF_REQUIRE(dup2(fd, fd) != -1);
165 ATF_TC_HEAD(dup2_max, tc)
167 atf_tc_set_md_var(tc, "descr", "Test dup2(2) against limits");
170 ATF_TC_BODY(dup2_max, tc)
174 (void)memset(&res, 0, sizeof(struct rlimit));
175 (void)getrlimit(RLIMIT_NOFILE, &res);
178 ATF_REQUIRE_ERRNO(EBADF, dup2(STDERR_FILENO, res.rlim_cur + 1) == -1);
181 ATF_TC_WITH_CLEANUP(dup2_mode);
182 ATF_TC_HEAD(dup2_mode, tc)
184 atf_tc_set_md_var(tc, "descr", "A basic test of dup2(2)");
187 ATF_TC_BODY(dup2_mode, tc)
189 check_mode(false, true, false);
192 ATF_TC_CLEANUP(dup2_mode, tc)
199 ATF_TC_HEAD(dup3_err, tc)
201 atf_tc_set_md_var(tc, "descr",
202 "Test error conditions of dup3(2) (PR lib/45148)");
205 ATF_TC_BODY(dup3_err, tc)
209 fd = open("/etc/passwd", O_RDONLY);
210 ATF_REQUIRE(fd >= 0);
213 #if defined(__FreeBSD__) || defined(__linux__)
215 * FreeBSD and linux return EINVAL, because...
217 * [EINVAL] The oldd argument is equal to the newd argument.
219 ATF_REQUIRE(dup3(fd, fd, O_CLOEXEC) == -1);
221 ATF_REQUIRE(dup3(fd, fd, O_CLOEXEC) != -1);
225 #if defined(__FreeBSD__) || defined(__linux__)
226 ATF_REQUIRE_ERRNO(EINVAL, dup3(-1, -1, O_CLOEXEC) == -1);
227 ATF_REQUIRE_ERRNO(EBADF, dup3(fd, -1, O_CLOEXEC) == -1);
229 ATF_REQUIRE_ERRNO(EBADF, dup3(-1, -1, O_CLOEXEC) == -1);
233 ATF_REQUIRE_ERRNO(EBADF, dup3(fd, -1, O_CLOEXEC) == -1);
236 ATF_REQUIRE_ERRNO(EBADF, dup3(-1, fd, O_CLOEXEC) == -1);
239 ATF_REQUIRE_ERRNO(EINVAL, dup3(fd, 1, O_NOFOLLOW) == -1);
245 ATF_TC_HEAD(dup3_max, tc)
247 atf_tc_set_md_var(tc, "descr", "Test dup3(2) against limits");
250 ATF_TC_BODY(dup3_max, tc)
254 (void)memset(&res, 0, sizeof(struct rlimit));
255 (void)getrlimit(RLIMIT_NOFILE, &res);
258 ATF_REQUIRE_ERRNO(EBADF, dup3(STDERR_FILENO,
259 res.rlim_cur + 1, O_CLOEXEC) == -1);
262 ATF_TC_WITH_CLEANUP(dup3_mode);
263 ATF_TC_HEAD(dup3_mode, tc)
265 atf_tc_set_md_var(tc, "descr", "A basic test of dup3(2)");
268 ATF_TC_BODY(dup3_mode, tc)
270 check_mode(false, false, true);
273 ATF_TC_CLEANUP(dup3_mode, tc)
279 ATF_TC_HEAD(dup_err, tc)
281 atf_tc_set_md_var(tc, "descr", "Test error conditions of dup(2)");
284 ATF_TC_BODY(dup_err, tc)
288 ATF_REQUIRE_ERRNO(EBADF, dup(-1) == -1);
291 ATF_TC_WITH_CLEANUP(dup_max);
292 ATF_TC_HEAD(dup_max, tc)
294 atf_tc_set_md_var(tc, "descr", "Test dup(2) against limits");
297 ATF_TC_BODY(dup_max, tc)
305 ATF_REQUIRE(pid >= 0);
310 * Open a temporary file until the
311 * maximum number of open files is
312 * reached. Ater that dup(2) family
313 * should fail with EMFILE.
316 (void)memset(&res, 0, sizeof(struct rlimit));
319 res.rlim_cur = res.rlim_max = n;
320 if (setrlimit(RLIMIT_NOFILE, &res) != 0)
323 buf = calloc(n, sizeof(int));
328 buf[0] = mkstemp(path);
333 for (i = 1; i < n; i++) {
335 buf[i] = open(path, O_RDONLY);
344 if (fd != -1 || errno != EMFILE)
352 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) {
354 if (WEXITSTATUS(sta) == EX_OSERR)
355 atf_tc_fail("system call error");
357 if (WEXITSTATUS(sta) == EX_DATAERR)
358 atf_tc_fail("dup(2) dupped more than RLIMIT_NOFILE");
360 atf_tc_fail("unknown error");
366 ATF_TC_CLEANUP(dup_max, tc)
371 ATF_TC_WITH_CLEANUP(dup_mode);
372 ATF_TC_HEAD(dup_mode, tc)
374 atf_tc_set_md_var(tc, "descr", "A basic test of dup(2)");
377 ATF_TC_BODY(dup_mode, tc)
379 check_mode(true, false, false);
382 ATF_TC_CLEANUP(dup_mode, tc)
390 ATF_TP_ADD_TC(tp, dup2_basic);
391 ATF_TP_ADD_TC(tp, dup2_err);
392 ATF_TP_ADD_TC(tp, dup2_max);
393 ATF_TP_ADD_TC(tp, dup2_mode);
394 ATF_TP_ADD_TC(tp, dup3_err);
395 ATF_TP_ADD_TC(tp, dup3_max);
396 ATF_TP_ADD_TC(tp, dup3_mode);
397 ATF_TP_ADD_TC(tp, dup_err);
398 ATF_TP_ADD_TC(tp, dup_max);
399 ATF_TP_ADD_TC(tp, dup_mode);
401 return atf_no_error();