h_spawnattr.c revision 1.3 
1/* $NetBSD: h_spawnattr.c,v 1.3 2021/11/07 15:46:20 christos Exp $ */
2
3/*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Charles Zhang <charles@NetBSD.org> and
9 * Martin Husemann <martin@NetBSD.org>.
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#include <sys/cdefs.h>
33__RCSID("$NetBSD: h_spawnattr.c,v 1.3 2021/11/07 15:46:20 christos Exp $");
34
35#include <errno.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <signal.h>
39#include <unistd.h>
40
41/*
42 * Helper to test the hardcoded assumptions from t_spawnattr.c
43 * Exit with appropriate exit status and print diagnostics to
44 * stderr explaining what is wrong.
45 */
46int
47main(int argc, char **argv)
48{
49	int parent_pipe, res = EXIT_SUCCESS;
50	sigset_t sig;
51	struct sigaction act;
52	ssize_t rd;
53	char tmp;
54
55	sigemptyset(&sig);
56	if (sigprocmask(0, NULL, &sig) < 0) {
57		fprintf(stderr, "%s: sigprocmask error\n", getprogname());
58		res = EXIT_FAILURE;
59	}
60	if (!sigismember(&sig, SIGUSR1)) {
61		fprintf(stderr, "%s: SIGUSR not in procmask\n", getprogname());
62		res = EXIT_FAILURE;
63	}
64	if (sigaction(SIGUSR1, NULL, &act) < 0) {
65		fprintf(stderr, "%s: sigaction error\n", getprogname());
66		res = EXIT_FAILURE;
67	}
68	if (act.sa_sigaction != (void *)SIG_DFL) {
69		fprintf(stderr, "%s: SIGUSR1 action != SIG_DFL\n",
70		    getprogname());
71		res = EXIT_FAILURE;
72	}
73
74	if (argc >= 2) {
75		parent_pipe = atoi(argv[1]);
76		if (parent_pipe > 2) {
77			printf("%s: waiting for command from parent on pipe "
78			    "%d\n", getprogname(), parent_pipe);
79			rd = read(parent_pipe, &tmp, 1);
80			if (rd == 1) {
81				printf("%s: got command %c from parent\n",
82				    getprogname(), tmp);
83			} else if (rd == -1) {
84				printf("%s: %d is no pipe, errno %d\n",
85				    getprogname(), parent_pipe, errno);
86				res = EXIT_FAILURE;
87			}
88		}
89	}
90
91	return res;
92}
93