1 /* $NetBSD: __sigaction14_sigtramp.c,v 1.1 2014/08/10 05:47:37 matt 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: __sigaction14_sigtramp.c,v 1.1 2014/08/10 05:47:37 matt Exp $");
35 #endif /* LIBC_SCCS and not lint */
36
37 #include <sys/types.h>
38 #include <stddef.h>
39 #include <signal.h>
40 #include <errno.h>
41
42 #include "extern.h"
43
__weak_alias(__sigaction14,__libc_sigaction14)44 __weak_alias(__sigaction14, __libc_sigaction14)
45
46 int
47 __libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact)
48 {
49 extern const int __sigtramp_siginfo_2[];
50
51 /*
52 * If no sigaction, use the "default" trampoline since it won't
53 * be used.
54 */
55 if (act == NULL)
56 return __sigaction_sigtramp(sig, act, oact, NULL, 0);
57
58 #ifdef __LIBC12_SOURCE__
59 /*
60 * We select the non-SA_SIGINFO trampoline if SA_SIGINFO is not
61 * set in the sigaction.
62 */
63 if ((act->sa_flags & SA_SIGINFO) == 0) {
64 extern const int __sigtramp_sigcontext_1[];
65 int sav = errno;
66 int rv = __sigaction_sigtramp(sig, act, oact,
67 __sigtramp_sigcontext_1, 1);
68 if (rv >= 0 || errno != EINVAL)
69 return rv;
70 errno = sav;
71 }
72 #endif
73
74 /*
75 * If SA_SIGINFO was specificed or the compatibility trampolines
76 * can't be used, use the siginfo trampoline.
77 */
78 return __sigaction_sigtramp(sig, act, oact, __sigtramp_siginfo_2, 2);
79 }
80