[apple/libc.git] / compat-43 / sigaltstk.c

/*
 * Copyright (c) 2005, 2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
#include <signal.h>
#include <errno.h>

int     __sigaltstack(const stack_t * __restrict, stack_t * __restrict);

/* UNIX03 only */
int     sigaltstack(const stack_t * __restrict nstack, stack_t * __restrict ostack) 
{
        if (nstack && nstack->ss_size < MINSIGSTKSZ) {
                errno = ENOMEM;
                return -1;
        }
        return __sigaltstack(nstack, ostack);
}