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
48static void
49run(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
100ATF_TC(pipe2_basic);
101ATF_TC_HEAD(pipe2_basic, tc)
102{
103	atf_tc_set_md_var(tc, "descr", "A basic test of pipe2(2)");
104}
105
106ATF_TC_BODY(pipe2_basic, tc)
107{
108	run(0);
109}
110
111ATF_TC(pipe2_consume);
112ATF_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
118ATF_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
149ATF_TC(pipe2_nonblock);
150ATF_TC_HEAD(pipe2_nonblock, tc)
151{
152	atf_tc_set_md_var(tc, "descr", "A non-blocking test of pipe2(2)");
153}
154
155ATF_TC_BODY(pipe2_nonblock, tc)
156{
157	run(O_NONBLOCK);
158}
159
160ATF_TC(pipe2_cloexec);
161ATF_TC_HEAD(pipe2_cloexec, tc)
162{
163	atf_tc_set_md_var(tc, "descr", "A close-on-exec test of pipe2(2)");
164}
165
166ATF_TC_BODY(pipe2_cloexec, tc)
167{
168	run(O_CLOEXEC);
169}
170
171#ifdef __NetBSD__
172ATF_TC(pipe2_nosigpipe);
173ATF_TC_HEAD(pipe2_nosigpipe, tc)
174{
175	atf_tc_set_md_var(tc, "descr", "A no sigpipe test of pipe2(2)");
176}
177
178ATF_TC_BODY(pipe2_nosigpipe, tc)
179{
180	run(O_NOSIGPIPE);
181}
182#endif
183
184ATF_TC(pipe2_einval);
185ATF_TC_HEAD(pipe2_einval, tc)
186{
187	atf_tc_set_md_var(tc, "descr", "A error check of pipe2(2)");
188}
189
190ATF_TC_BODY(pipe2_einval, tc)
191{
192	int fd[2];
193	ATF_REQUIRE_ERRNO(EINVAL, pipe2(fd, O_ASYNC) == -1);
194}
195
196ATF_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