1/*	$NetBSD: dislodgefd.c,v 1.1 2023/10/13 18:46:22 ad Exp $	*/
2
3/*-
4 * Copyright (c) 2023 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/socket.h>
30#include <sys/un.h>
31
32#include <pthread.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36#include <unistd.h>
37#include <err.h>
38
39pthread_barrier_t	barrier;
40int			fds[2];
41
42static void *
43reader(void *cookie)
44{
45	char buf[1];
46
47	(void)pthread_barrier_wait(&barrier);
48	printf("reader(): commencing read, this should error out... after 1s\n");
49	if (read(fds[0], buf, sizeof(buf)) == -1)
50		err(1, "read");
51
52	printf("reader(): read terminated without error??\n");
53	return NULL;
54}
55
56int
57main(int argc, char *argv[])
58{
59	pthread_t pt;
60
61	if (argc > 1 && strcmp(argv[1], "pipe") == 0) {
62		if (pipe(fds))
63			err(1, "pipe");
64	} else {
65		if (socketpair(PF_LOCAL, SOCK_STREAM, 0, fds) < 0)
66			err(1, "socketpair");
67	}
68	pthread_barrier_init(&barrier, NULL, 2);
69	if (pthread_create(&pt, NULL, reader, NULL)) {
70		errx(1, "pthread_create failed");
71	}
72	(void)pthread_barrier_wait(&barrier);
73	sleep(1);
74	printf("main(): closing the reader side fd..\n");
75	close(fds[0]);
76	printf("main(): sleeping again for a bit..\n");
77	sleep(1);
78	printf("main(): exiting.\n");
79	return 0;
80}
81