1 /* $NetBSD: compat___sigaction14_sigtramp.c,v 1.2 2024/01/20 14:52:46 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
34 __RCSID("$NetBSD: compat___sigaction14_sigtramp.c,v 1.2 2024/01/20 14:52:46 christos Exp $");
35 #endif /* LIBC_SCCS and not lint */
36
37 #define __LIBC12_SOURCE__
38 #include <sys/types.h>
39 #include <stddef.h>
40 #include <sys/time.h>
41 #include <compat/sys/time.h>
42 #include <signal.h>
43 #include <compat/include/signal.h>
44 #include <errno.h>
45
46 #include "extern.h"
47
__weak_alias(__sigaction14,__libc_sigaction14)48 __weak_alias(__sigaction14, __libc_sigaction14)
49
50 int
51 __libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact)
52 {
53
54 /*
55 * If no sigaction, use the "default" trampoline since it won't
56 * be used.
57 */
58 if (act == NULL)
59 return __sigaction_sigtramp(sig, act, oact, NULL, 0);
60
61 #if defined(__HAVE_STRUCT_SIGCONTEXT) && defined(__LIBC12_SOURCE__)
62 /*
63 * We select the non-SA_SIGINFO trampoline if SA_SIGINFO is not
64 * set in the sigaction.
65 */
66 if ((act->sa_flags & SA_SIGINFO) == 0) {
67 int sav = errno;
68 int rv = __sigaction_sigtramp(sig, act, oact,
69 __SIGTRAMP_SIGCONTEXT, __SIGTRAMP_SIGCONTEXT_VERSION);
70 if (rv >= 0 || errno != EINVAL)
71 return rv;
72 errno = sav;
73 }
74 #endif
75
76 /*
77 * If SA_SIGINFO was specified or the compatibility trampolines
78 * can't be used, use the siginfo trampoline.
79 */
80 return __sigaction_sigtramp(sig, act, oact,
81 __SIGTRAMP_SIGINFO, __SIGTRAMP_SIGINFO_VERSION);
82 }
83