1 /* $NetBSD: t_pipe2.c,v 1.9 2017/01/13 21:19:45 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 Christos Zoulas.
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38 #include <sys/cdefs.h>
39 __RCSID("$NetBSD: t_pipe2.c,v 1.9 2017/01/13 21:19:45 christos Exp $");
40
41 #include <atf-c.h>
42 #include <fcntl.h>
43 #include <unistd.h>
44 #include <stdlib.h>
45 #include <errno.h>
46 #include <sys/resource.h>
47
48 static void
run(int flags)49 run(int flags)
50 {
51 int fd[2], i;
52
53 while ((i = open("/", O_RDONLY)) < 3)
54 ATF_REQUIRE(i != -1);
55
56 #ifdef __NetBSD__
57 /* This check is harmful since it closes atf's output file */
58 ATF_REQUIRE_MSG(closefrom(3) != -1, "closefrom failed: %s",
59 strerror(errno));
60 #endif
61
62 ATF_REQUIRE(pipe2(fd, flags) == 0);
63
64 #ifdef __NetBSD__
65 /* This check is harmful since it requires closing atf's output file */
66 ATF_REQUIRE(fd[0] == 3);
67 ATF_REQUIRE(fd[1] == 4);
68 #endif
69
70 if (flags & O_CLOEXEC) {
71 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) != 0);
72 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) != 0);
73 } else {
74 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) == 0);
75 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) == 0);
76 }
77
78 if (flags & O_NONBLOCK) {
79 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) != 0);
80 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) != 0);
81 } else {
82 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) == 0);
83 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) == 0);
84 }
85
86 #ifndef __FreeBSD__
87 if (flags & O_NOSIGPIPE) {
88 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) != 0);
89 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) != 0);
90 } else {
91 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) == 0);
92 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) == 0);
93 }
94 #endif
95
96 ATF_REQUIRE(close(fd[0]) != -1);
97 ATF_REQUIRE(close(fd[1]) != -1);
98 }
99
100 ATF_TC(pipe2_basic);
ATF_TC_HEAD(pipe2_basic,tc)101 ATF_TC_HEAD(pipe2_basic, tc)
102 {
103 atf_tc_set_md_var(tc, "descr", "A basic test of pipe2(2)");
104 }
105
ATF_TC_BODY(pipe2_basic,tc)106 ATF_TC_BODY(pipe2_basic, tc)
107 {
108 run(0);
109 }
110
111 ATF_TC(pipe2_consume);
ATF_TC_HEAD(pipe2_consume,tc)112 ATF_TC_HEAD(pipe2_consume, tc)
113 {
114 atf_tc_set_md_var(tc, "descr", "Test that consuming file descriptors "
115 "with pipe2(2) does not crash the system (PR kern/46457)");
116 }
117
ATF_TC_BODY(pipe2_consume,tc)118 ATF_TC_BODY(pipe2_consume, tc)
119 {
120 struct rlimit rl;
121 int err, filedes[2];
122 int old;
123
124 #ifdef __FreeBSD__
125 closefrom(4);
126 #else
127 ATF_REQUIRE_MSG(closefrom(4) != -1, "closefrom failed: %s",
128 strerror(errno));
129 #endif
130
131 err = getrlimit(RLIMIT_NOFILE, &rl);
132 ATF_REQUIRE(err == 0);
133 /*
134 * The heart of this test is to run against the number of open
135 * file descriptor limit in the middle of a pipe2() call - i.e.
136 * before the call only a single descriptor may be openend.
137 */
138 old = rl.rlim_cur;
139 rl.rlim_cur = 4;
140 err = setrlimit(RLIMIT_NOFILE, &rl);
141 ATF_REQUIRE(err == 0);
142
143 err = pipe2(filedes, O_CLOEXEC);
144 ATF_REQUIRE(err == -1);
145 rl.rlim_cur = old;
146 err = setrlimit(RLIMIT_NOFILE, &rl);
147 }
148
149 ATF_TC(pipe2_nonblock);
ATF_TC_HEAD(pipe2_nonblock,tc)150 ATF_TC_HEAD(pipe2_nonblock, tc)
151 {
152 atf_tc_set_md_var(tc, "descr", "A non-blocking test of pipe2(2)");
153 }
154
ATF_TC_BODY(pipe2_nonblock,tc)155 ATF_TC_BODY(pipe2_nonblock, tc)
156 {
157 run(O_NONBLOCK);
158 }
159
160 ATF_TC(pipe2_cloexec);
ATF_TC_HEAD(pipe2_cloexec,tc)161 ATF_TC_HEAD(pipe2_cloexec, tc)
162 {
163 atf_tc_set_md_var(tc, "descr", "A close-on-exec test of pipe2(2)");
164 }
165
ATF_TC_BODY(pipe2_cloexec,tc)166 ATF_TC_BODY(pipe2_cloexec, tc)
167 {
168 run(O_CLOEXEC);
169 }
170
171 #ifdef __NetBSD__
172 ATF_TC(pipe2_nosigpipe);
ATF_TC_HEAD(pipe2_nosigpipe,tc)173 ATF_TC_HEAD(pipe2_nosigpipe, tc)
174 {
175 atf_tc_set_md_var(tc, "descr", "A no sigpipe test of pipe2(2)");
176 }
177
ATF_TC_BODY(pipe2_nosigpipe,tc)178 ATF_TC_BODY(pipe2_nosigpipe, tc)
179 {
180 run(O_NOSIGPIPE);
181 }
182 #endif
183
184 ATF_TC(pipe2_einval);
ATF_TC_HEAD(pipe2_einval,tc)185 ATF_TC_HEAD(pipe2_einval, tc)
186 {
187 atf_tc_set_md_var(tc, "descr", "A error check of pipe2(2)");
188 }
189
ATF_TC_BODY(pipe2_einval,tc)190 ATF_TC_BODY(pipe2_einval, tc)
191 {
192 int fd[2];
193 ATF_REQUIRE_ERRNO(EINVAL, pipe2(fd, O_ASYNC) == -1);
194 }
195
ATF_TP_ADD_TCS(tp)196 ATF_TP_ADD_TCS(tp)
197 {
198
199 ATF_TP_ADD_TC(tp, pipe2_basic);
200 ATF_TP_ADD_TC(tp, pipe2_consume);
201 ATF_TP_ADD_TC(tp, pipe2_nonblock);
202 ATF_TP_ADD_TC(tp, pipe2_cloexec);
203 #ifdef __NetBSD__
204 ATF_TP_ADD_TC(tp, pipe2_nosigpipe);
205 #endif
206 ATF_TP_ADD_TC(tp, pipe2_einval);
207
208 return atf_no_error();
209 }
210