1/*
2 * Copyright (c) 1999 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/*
24 * Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved
25 *
26 *	@(#)sigaction.c	1.0
27 */
28
29#include <unistd.h>
30#include <signal.h>
31#include <sys/signal.h>
32#include <errno.h>
33
34/*
35 *	Intercept the sigaction syscall and use our signal trampoline
36 *	as the signal handler instead.  The code here is derived
37 *	from sigvec in sys/kern_sig.c.
38 */
39extern int __sigaction (int, struct __sigaction * __restrict, struct sigaction * __restrict);
40
41int
42sigaction (int sig, const struct sigaction * __restrict nsv, struct sigaction * __restrict osv)
43{
44	extern void _sigtramp();
45	struct __sigaction sa;
46	struct __sigaction *sap;
47
48	if (sig <= 0 || sig >= NSIG || sig == SIGKILL || sig == SIGSTOP) {
49	        errno = EINVAL;
50	        return (-1);
51	}
52	sap = (struct __sigaction *)0;
53	if (nsv) {
54		sa.sa_handler = nsv->sa_handler;
55		sa.sa_tramp = _sigtramp;
56		sa.sa_mask = nsv->sa_mask;
57		sa.sa_flags = nsv->sa_flags;
58		sap = &sa;
59	}
60	return __sigaction(sig, sap, osv);
61}
62
63// XXX
64#ifdef __DYNAMIC__
65
66int
67_sigaction_nobind (sig, nsv, osv)
68        int sig;
69	register const struct sigaction *nsv;
70        register struct sigaction *osv;
71{
72    return sigaction(sig, nsv, osv);
73}
74#endif
75
76