compat_sigaltstack.c revision 1.1 
1/*	$NetBSD: compat_sigaltstack.c,v 1.1 2005/09/13 01:44:09 christos Exp $	*/
2
3/*-
4 * Copyright (c) 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Klaus Klein.
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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include <sys/cdefs.h>
40#if defined(LIBC_SCCS) && !defined(lint)
41__RCSID("$NetBSD: compat_sigaltstack.c,v 1.1 2005/09/13 01:44:09 christos Exp $");
42#endif /* LIBC_SCCS and not lint */
43
44#define __LIBC12_SOURCE__
45
46#include <limits.h>
47#include <signal.h>
48#include <compat/include/signal.h>
49#include <stddef.h>
50
51int
52sigaltstack(onss, ooss)
53	const struct sigaltstack13 *onss;
54	struct sigaltstack13 *ooss;
55{
56	stack_t nss, oss;
57	int error;
58
59	nss.ss_sp = onss->ss_sp;
60	nss.ss_size = onss->ss_size;
61	nss.ss_flags = onss->ss_flags;
62
63	error = __sigaltstack14(&nss, &oss);
64
65	if (error == 0 && ooss != NULL) {
66		ooss->ss_sp = oss.ss_sp;
67		if (oss.ss_size > INT_MAX)
68			ooss->ss_size = INT_MAX;
69		else
70			ooss->ss_size = oss.ss_size;
71		ooss->ss_flags = oss.ss_flags;
72	}
73
74	return (error);
75}
76