1/*
2 * Copyright (c) 2005, 2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23#include <signal.h>
24#include <errno.h>
25
26int	__sigaltstack(const stack_t * __restrict, stack_t * __restrict);
27
28/* UNIX03 only */
29int	sigaltstack(const stack_t * __restrict nstack, stack_t * __restrict ostack)
30{
31	if (nstack && nstack->ss_size < MINSIGSTKSZ) {
32		errno = ENOMEM;
33		return -1;
34	}
35	return __sigaltstack(nstack, ostack);
36}
37