1 /* $NetBSD: h_execsig.c,v 1.1 2025/03/13 01:27:27 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2025 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/cdefs.h>
30 __RCSID("$NetBSD: h_execsig.c,v 1.1 2025/03/13 01:27:27 riastradh Exp $");
31
32 /*
33 * Helper program for testing signal delivery during execve(2) and
34 * posix_spawn(2). The caller will:
35 *
36 * 1. fork and exec, or spawn
37 * 2. kill the child
38 * 3. write a byte to be read from the child's stdin
39 *
40 * Since the caller issues syscalls in that order, the signal should be
41 * delivered to the child first, and it should be interrupted by a
42 * signal before it returnsa byte from read(2).
43 */
44
45 #include <err.h>
46 #include <unistd.h>
47
48 int
main(void)49 main(void)
50 {
51
52 if (read(STDIN_FILENO, (char[]){0}, 1) == -1)
53 err(1, "read");
54 return 0;
55 }
56