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 ATF_REQUIRE_MSG(closefrom(3) != -1, "closefrom failed: %s",
57 strerror(errno));
58
59 ATF_REQUIRE(pipe2(fd, flags) == 0);
60
61 ATF_REQUIRE(fd[0] == 3);
62 ATF_REQUIRE(fd[1] == 4);
63
64 if (flags & O_CLOEXEC) {
65 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) != 0);
66 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) != 0);
67 } else {
68 ATF_REQUIRE((fcntl(fd[0], F_GETFD) & FD_CLOEXEC) == 0);
69 ATF_REQUIRE((fcntl(fd[1], F_GETFD) & FD_CLOEXEC) == 0);
70 }
71
72 if (flags & O_NONBLOCK) {
73 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) != 0);
74 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) != 0);
75 } else {
76 ATF_REQUIRE((fcntl(fd[0], F_GETFL) & O_NONBLOCK) == 0);
77 ATF_REQUIRE((fcntl(fd[1], F_GETFL) & O_NONBLOCK) == 0);
78 }
79
80 if (flags & O_NOSIGPIPE) {
81 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) != 0);
82 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) != 0);
83 } else {
84 ATF_REQUIRE(fcntl(fd[0], F_GETNOSIGPIPE) == 0);
85 ATF_REQUIRE(fcntl(fd[1], F_GETNOSIGPIPE) == 0);
86 }
87
88 ATF_REQUIRE(close(fd[0]) != -1);
89 ATF_REQUIRE(close(fd[1]) != -1);
90 }
91
92 ATF_TC(pipe2_basic);
ATF_TC_HEAD(pipe2_basic,tc)93 ATF_TC_HEAD(pipe2_basic, tc)
94 {
95 atf_tc_set_md_var(tc, "descr", "A basic test of pipe2(2)");
96 }
97
ATF_TC_BODY(pipe2_basic,tc)98 ATF_TC_BODY(pipe2_basic, tc)
99 {
100 run(0);
101 }
102
103 ATF_TC(pipe2_consume);
ATF_TC_HEAD(pipe2_consume,tc)104 ATF_TC_HEAD(pipe2_consume, tc)
105 {
106 atf_tc_set_md_var(tc, "descr", "Test that consuming file descriptors "
107 "with pipe2(2) does not crash the system (PR kern/46457)");
108 }
109
ATF_TC_BODY(pipe2_consume,tc)110 ATF_TC_BODY(pipe2_consume, tc)
111 {
112 struct rlimit rl;
113 int err, filedes[2];
114 int old;
115
116 ATF_REQUIRE_MSG(closefrom(4) != -1, "closefrom failed: %s",
117 strerror(errno));
118
119 err = getrlimit(RLIMIT_NOFILE, &rl);
120 ATF_REQUIRE(err == 0);
121 /*
122 * The heart of this test is to run against the number of open
123 * file descriptor limit in the middle of a pipe2() call - i.e.
124 * before the call only a single descriptor may be openend.
125 */
126 old = rl.rlim_cur;
127 rl.rlim_cur = 4;
128 err = setrlimit(RLIMIT_NOFILE, &rl);
129 ATF_REQUIRE(err == 0);
130
131 err = pipe2(filedes, O_CLOEXEC);
132 ATF_REQUIRE(err == -1);
133 rl.rlim_cur = old;
134 err = setrlimit(RLIMIT_NOFILE, &rl);
135 }
136
137 ATF_TC(pipe2_nonblock);
ATF_TC_HEAD(pipe2_nonblock,tc)138 ATF_TC_HEAD(pipe2_nonblock, tc)
139 {
140 atf_tc_set_md_var(tc, "descr", "A non-blocking test of pipe2(2)");
141 }
142
ATF_TC_BODY(pipe2_nonblock,tc)143 ATF_TC_BODY(pipe2_nonblock, tc)
144 {
145 run(O_NONBLOCK);
146 }
147
148 ATF_TC(pipe2_cloexec);
ATF_TC_HEAD(pipe2_cloexec,tc)149 ATF_TC_HEAD(pipe2_cloexec, tc)
150 {
151 atf_tc_set_md_var(tc, "descr", "A close-on-exec test of pipe2(2)");
152 }
153
ATF_TC_BODY(pipe2_cloexec,tc)154 ATF_TC_BODY(pipe2_cloexec, tc)
155 {
156 run(O_CLOEXEC);
157 }
158
159 ATF_TC(pipe2_nosigpipe);
ATF_TC_HEAD(pipe2_nosigpipe,tc)160 ATF_TC_HEAD(pipe2_nosigpipe, tc)
161 {
162 atf_tc_set_md_var(tc, "descr", "A no sigpipe test of pipe2(2)");
163 }
164
ATF_TC_BODY(pipe2_nosigpipe,tc)165 ATF_TC_BODY(pipe2_nosigpipe, tc)
166 {
167 run(O_NOSIGPIPE);
168 }
169
170 ATF_TC(pipe2_einval);
ATF_TC_HEAD(pipe2_einval,tc)171 ATF_TC_HEAD(pipe2_einval, tc)
172 {
173 atf_tc_set_md_var(tc, "descr", "A error check of pipe2(2)");
174 }
175
ATF_TC_BODY(pipe2_einval,tc)176 ATF_TC_BODY(pipe2_einval, tc)
177 {
178 int fd[2];
179 ATF_REQUIRE_ERRNO(EINVAL, pipe2(fd, O_ASYNC) == -1);
180 }
181
ATF_TP_ADD_TCS(tp)182 ATF_TP_ADD_TCS(tp)
183 {
184
185 ATF_TP_ADD_TC(tp, pipe2_basic);
186 ATF_TP_ADD_TC(tp, pipe2_consume);
187 ATF_TP_ADD_TC(tp, pipe2_nonblock);
188 ATF_TP_ADD_TC(tp, pipe2_cloexec);
189 ATF_TP_ADD_TC(tp, pipe2_nosigpipe);
190 ATF_TP_ADD_TC(tp, pipe2_einval);
191
192 return atf_no_error();
193 }
194