1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #pragma prototyped
23 
24 #include <ast.h>
25 
26 #if _lib_sigflag
27 
28 NoN(sigflag)
29 
30 #else
31 
32 #include <sig.h>
33 
34 int
35 sigflag(int sig, int flags, int set)
36 {
37 #if _lib_sigaction
38 	struct sigaction	sa;
39 
40 	if (sigaction(sig, NiL, &sa))
41 		return -1;
42 	if (set)
43 		sa.sa_flags |= flags;
44 	else
45 		sa.sa_flags &= ~flags;
46 	return sigaction(sig, &sa, NiL);
47 #else
48 	return -1;
49 #endif
50 }
51 
52 #endif
53