1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* Check decoding of signalfd4 syscall.
*
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016-2023 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#if defined HAVE_SYS_SIGNALFD_H \
&& defined HAVE_SIGNALFD
# include <signal.h>
# include <stdio.h>
# include <unistd.h>
# include <sys/signalfd.h>
# include "kernel_fcntl.h"
# ifndef SKIP_IF_PROC_IS_UNAVAILABLE
# define SKIP_IF_PROC_IS_UNAVAILABLE
# endif
int
main(void)
{
SKIP_IF_PROC_IS_UNAVAILABLE;
const char *const sigs1 = "USR2";
const char *const sigs2 = SIGUSR2 < SIGCHLD ? "USR2 CHLD" : "CHLD USR2";
const unsigned int size = get_sigset_size();
sigset_t mask;
sigemptyset(&mask);
sigaddset(&mask, SIGUSR2);
int fd = signalfd(-1, &mask, SFD_CLOEXEC | SFD_NONBLOCK);
# ifdef PRINT_SIGNALFD
if (fd == -1)
perror_msg_and_skip("signalfd");
# endif
printf("signalfd4(-1, [%s], %u, SFD_CLOEXEC|SFD_NONBLOCK) = %s",
sigs1, size, sprintrc(fd));
# ifdef PRINT_SIGNALFD
printf("<signalfd:[%s]>\n", sigs1);
# else
putchar('\n');
# endif
sigaddset(&mask, SIGCHLD);
fd = signalfd(fd, &mask, 0);
# ifdef PRINT_SIGNALFD
printf("signalfd4(%d<signalfd:[%s]>, [%s], %u, 0) = %s<signalfd:[%s]>\n",
fd, sigs1, sigs2, size, sprintrc(fd), sigs2);
# else
printf("signalfd4(%d, [%s], %u, 0) = %s\n", fd, sigs2, size, sprintrc(fd));
# endif
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("HAVE_SYS_SIGNALFD_H && HAVE_SIGNALFD")
#endif
|
