1 /*	$NetBSD: signal.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $	*/
2 
3 /*
4  * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
5  * (Royal Institute of Technology, Stockholm, Sweden).
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  *
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  * 3. Neither the name of the Institute nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 #include <config.h>
37 
38 #include <signal.h>
39 #include <krb5/roken.h>
40 
41 /*
42  * We would like to always use this signal but there is a link error
43  * on NEXTSTEP
44  */
45 #if !defined(NeXT) && !defined(__APPLE__)
46 /*
47  * Bugs:
48  *
49  * Do we need any extra hacks for SIGCLD and/or SIGCHLD?
50  */
51 
52 ROKEN_LIB_FUNCTION SigAction ROKEN_LIB_CALL
53 signal(int iSig, SigAction pAction)
54 {
55     struct sigaction saNew, saOld;
56 
57     saNew.sa_handler = pAction;
58     sigemptyset(&saNew.sa_mask);
59     saNew.sa_flags = 0;
60 
61     if (iSig == SIGALRM)
62 	{
63 #ifdef SA_INTERRUPT
64 	    saNew.sa_flags |= SA_INTERRUPT;
65 #endif
66 	}
67     else
68 	{
69 #ifdef SA_RESTART
70 	    saNew.sa_flags |= SA_RESTART;
71 #endif
72 	}
73 
74     if (sigaction(iSig, &saNew, &saOld) < 0)
75 	return(SIG_ERR);
76 
77     return(saOld.sa_handler);
78 }
79 #endif
80