compat_sigaltstack.c revision 1.3 
1/*	$NetBSD: compat_sigaltstack.c,v 1.3 2009/01/11 02:46:26 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 *
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_sigaltstack.c,v 1.3 2009/01/11 02:46:26 christos Exp $");
35#endif /* LIBC_SCCS and not lint */
36
37#define __LIBC12_SOURCE__
38
39#include <limits.h>
40#include <sys/time.h>
41#include <compat/sys/time.h>
42#include <signal.h>
43#include <compat/include/signal.h>
44#include <stddef.h>
45
46int
47sigaltstack(onss, ooss)
48	const struct sigaltstack13 *onss;
49	struct sigaltstack13 *ooss;
50{
51	stack_t nss, oss;
52	int error;
53
54	nss.ss_sp = onss->ss_sp;
55	nss.ss_size = onss->ss_size;
56	nss.ss_flags = onss->ss_flags;
57
58	error = __sigaltstack14(&nss, &oss);
59
60	if (error == 0 && ooss != NULL) {
61		ooss->ss_sp = oss.ss_sp;
62		if (oss.ss_size > INT_MAX)
63			ooss->ss_size = INT_MAX;
64		else
65			ooss->ss_size = oss.ss_size;
66		ooss->ss_flags = oss.ss_flags;
67	}
68
69	return (error);
70}
71