1/*	$OpenBSD: t_poll.c,v 1.3 2022/05/28 18:39:39 mbuhl Exp $	*/
2/*	$NetBSD: t_poll.c,v 1.4 2020/07/17 15:34:16 kamil Exp $	*/
3
4/*-
5 * Copyright (c) 2011 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Matthias Scheler.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include "macros.h"
34
35#include <sys/time.h>
36#include <sys/wait.h>
37
38#include "atf-c.h"
39#include <errno.h>
40#include <fcntl.h>
41#include <paths.h>
42#include <poll.h>
43#include <stdio.h>
44#include <signal.h>
45#include <unistd.h>
46
47static int desc;
48
49static void
50child1(void)
51{
52	struct pollfd pfd;
53
54	pfd.fd = desc;
55	pfd.events = POLLIN | POLLHUP | POLLOUT;
56
57	(void)poll(&pfd, 1, 2000);
58	(void)printf("child1 exit\n");
59}
60
61static void
62child2(void)
63{
64	struct pollfd pfd;
65
66	pfd.fd = desc;
67	pfd.events = POLLIN | POLLHUP | POLLOUT;
68
69	(void)sleep(1);
70	(void)poll(&pfd, 1, INFTIM);
71	(void)printf("child2 exit\n");
72}
73
74static void
75child3(void)
76{
77	struct pollfd pfd;
78
79	(void)sleep(5);
80
81	pfd.fd = desc;
82	pfd.events = POLLIN | POLLHUP | POLLOUT;
83
84	(void)poll(&pfd, 1, INFTIM);
85	(void)printf("child3 exit\n");
86}
87
88ATF_TC(3way);
89ATF_TC_HEAD(3way, tc)
90{
91	atf_tc_set_md_var(tc, "timeout", "15");
92	atf_tc_set_md_var(tc, "descr",
93	    "Check for 3-way collision for descriptor. First child comes "
94	    "and polls on descriptor, second child comes and polls, first "
95	    "child times out and exits, third child comes and polls. When "
96	    "the wakeup event happens, the two remaining children should "
97	    "both be awaken. (kern/17517)");
98}
99
100ATF_TC_BODY(3way, tc)
101{
102	int pf[2];
103	int status, i;
104	pid_t pid;
105
106	pipe(pf);
107	desc = pf[0];
108
109	pid = fork();
110	ATF_REQUIRE(pid >= 0);
111
112	if (pid == 0) {
113		(void)close(pf[1]);
114		child1();
115		_exit(0);
116		/* NOTREACHED */
117	}
118
119	pid = fork();
120	ATF_REQUIRE(pid >= 0);
121
122	if (pid == 0) {
123		(void)close(pf[1]);
124		child2();
125		_exit(0);
126		/* NOTREACHED */
127	}
128
129	pid = fork();
130	ATF_REQUIRE( pid >= 0);
131
132	if (pid == 0) {
133		(void)close(pf[1]);
134		child3();
135		_exit(0);
136		/* NOTREACHED */
137	}
138
139	(void)sleep(10);
140
141	(void)printf("parent write\n");
142
143	ATF_REQUIRE(write(pf[1], "konec\n", 6) == 6);
144
145	for(i = 0; i < 3; ++i)
146		(void)wait(&status);
147
148	(void)printf("parent terminated\n");
149}
150
151ATF_TC(basic);
152ATF_TC_HEAD(basic, tc)
153{
154	atf_tc_set_md_var(tc, "timeout", "10");
155	atf_tc_set_md_var(tc, "descr",
156	    "Basis functionality test for poll(2)");
157}
158
159ATF_TC_BODY(basic, tc)
160{
161	int fds[2];
162	struct pollfd pfds[2];
163	int ret;
164
165	ATF_REQUIRE_EQ(pipe(fds), 0);
166
167	pfds[0].fd = fds[0];
168	pfds[0].events = POLLIN;
169	pfds[1].fd = fds[1];
170	pfds[1].events = POLLOUT;
171
172	/*
173	 * Check that we get a timeout waiting for data on the read end
174	 * of our pipe.
175	 */
176	pfds[0].revents = -1;
177	pfds[1].revents = -1;
178	ret = poll(&pfds[0], 1, 1);
179	ATF_REQUIRE_EQ_MSG(ret, 0, "got: %d", ret);
180	ATF_REQUIRE_EQ_MSG(pfds[0].revents, 0, "got: %d", pfds[0].revents);
181	ATF_REQUIRE_EQ_MSG(pfds[1].revents, -1, "got: %d", pfds[1].revents);
182
183	/* Check that the write end of the pipe as reported as ready. */
184	pfds[0].revents = -1;
185	pfds[1].revents = -1;
186	ret = poll(&pfds[1], 1, 1);
187	ATF_REQUIRE_EQ_MSG(ret, 1, "got: %d", ret);
188	ATF_REQUIRE_EQ_MSG(pfds[0].revents, -1, "got: %d", pfds[0].revents);
189	ATF_REQUIRE_EQ_MSG(pfds[1].revents, POLLOUT, "got: %d",\
190	    pfds[1].revents);
191
192	/* Check that only the write end of the pipe as reported as ready. */
193	pfds[0].revents = -1;
194	pfds[1].revents = -1;
195	ret = poll(pfds, 2, 1);
196	ATF_REQUIRE_EQ_MSG(ret, 1, "got: %d", ret);
197	ATF_REQUIRE_EQ_MSG(pfds[0].revents, 0, "got: %d", pfds[0].revents);
198	ATF_REQUIRE_EQ_MSG(pfds[1].revents, POLLOUT, "got: %d",
199	    pfds[1].revents);
200
201	/* Write data to our pipe. */
202	ATF_REQUIRE_EQ(write(fds[1], "", 1), 1);
203
204	/* Check that both ends of our pipe are reported as ready. */
205	pfds[0].revents = -1;
206	pfds[1].revents = -1;
207	ret = poll(pfds, 2, 1);
208	ATF_REQUIRE_EQ_MSG(ret, 2, "got: %d", ret);
209	ATF_REQUIRE_EQ_MSG(pfds[0].revents, POLLIN, "got: %d",
210	    pfds[0].revents);
211	ATF_REQUIRE_EQ_MSG(pfds[1].revents, POLLOUT, "got: %d",
212	    pfds[1].revents);
213
214	ATF_REQUIRE_EQ(close(fds[0]), 0);
215	ATF_REQUIRE_EQ(close(fds[1]), 0);
216}
217
218ATF_TC(err);
219ATF_TC_HEAD(err, tc)
220{
221	atf_tc_set_md_var(tc, "descr", "Check errors from poll(2)");
222}
223
224ATF_TC_BODY(err, tc)
225{
226	struct pollfd pfd;
227	int fd = 0;
228
229	pfd.fd = fd;
230	pfd.events = POLLIN;
231
232	errno = 0;
233	ATF_REQUIRE_ERRNO(EFAULT, poll((struct pollfd *)-1, 1, -1) == -1);
234
235	errno = 0;
236	ATF_REQUIRE_ERRNO(EINVAL, poll(&pfd, 1, -2) == -1);
237}
238
239ATF_TP_ADD_TCS(tp)
240{
241
242	ATF_TP_ADD_TC(tp, 3way);
243	ATF_TP_ADD_TC(tp, basic);
244	ATF_TP_ADD_TC(tp, err);
245
246	return atf_no_error();
247}
248