1/*
2 * Check decoding of signalfd4 syscall.
3 *
4 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "tests.h"
31#include <fcntl.h>
32#include <asm/unistd.h>
33
34#if defined __NR_rt_sigprocmask \
35 && defined HAVE_SYS_SIGNALFD_H \
36 && defined HAVE_SIGNALFD \
37 && defined O_CLOEXEC
38
39# include <signal.h>
40# include <stdio.h>
41# include <unistd.h>
42# include <sys/signalfd.h>
43
44static unsigned int
45get_sigset_size(void)
46{
47	const unsigned int big_size = 1024 / 8;
48	unsigned int set_size;
49
50	for (set_size = big_size; set_size; set_size >>= 1) {
51		if (!syscall(__NR_rt_sigprocmask, SIG_SETMASK,
52			     NULL, NULL, set_size))
53			break;
54	}
55
56	if (!set_size)
57		perror_msg_and_fail("rt_sigprocmask");
58
59	return set_size;
60}
61
62int
63main(void)
64{
65	const char *const sigs = SIGUSR2 < SIGCHLD ? "USR2 CHLD" : "CHLD USR2";
66	const unsigned int size = get_sigset_size();
67
68	sigset_t mask;
69	sigemptyset(&mask);
70	sigaddset(&mask, SIGUSR2);
71	sigaddset(&mask, SIGCHLD);
72
73	int fd = signalfd(-1, &mask, O_CLOEXEC | O_NONBLOCK);
74	printf("signalfd4(-1, [%s], %u, SFD_CLOEXEC|SFD_NONBLOCK) = %s\n",
75	       sigs, size, sprintrc(fd));
76
77	puts("+++ exited with 0 +++");
78	return 0;
79}
80
81#else
82
83SKIP_MAIN_UNDEFINED("__NR_rt_sigprocmask && HAVE_SYS_SIGNALFD_H"
84		    " && HAVE_SIGNALFD && O_CLOEXEC")
85
86#endif
87