1 /* $OpenBSD: pollnval.c,v 1.2 2021/10/29 20:15:03 bluhm Exp $ */
2
3 /*
4 * Copyright (c) 2021 Leah Neukirchen <leah@vuxu.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <assert.h>
20 #include <stdio.h>
21 #include <poll.h>
22 #include <unistd.h>
23
24 int
main(void)25 main(void)
26 {
27 struct pollfd fds[1];
28
29 /* Do not hang forever, abort with timeout. */
30 alarm(10);
31
32 fds[0].fd = 0;
33 fds[0].events = POLLIN | POLLHUP;
34 close(0);
35
36 assert(poll(fds, 1, -1) == 1);
37 assert(fds[0].revents & POLLNVAL);
38
39 return 0;
40 }
41