1/*
2 * Copyright (c) 1995 - 2000 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifdef HAVE_CONFIG_H
35#include <config.h>
36RCSID("$Id: signal.c 14773 2005-04-12 11:29:18Z lha $");
37#endif
38
39#include <signal.h>
40#include "roken.h"
41
42/*
43 * We would like to always use this signal but there is a link error
44 * on NEXTSTEP
45 */
46#if !defined(NeXT) && !defined(__APPLE__)
47/*
48 * Bugs:
49 *
50 * Do we need any extra hacks for SIGCLD and/or SIGCHLD?
51 */
52
53SigAction ROKEN_LIB_FUNCTION
54signal(int iSig, SigAction pAction)
55{
56    struct sigaction saNew, saOld;
57
58    saNew.sa_handler = pAction;
59    sigemptyset(&saNew.sa_mask);
60    saNew.sa_flags = 0;
61
62    if (iSig == SIGALRM)
63	{
64#ifdef SA_INTERRUPT
65	    saNew.sa_flags |= SA_INTERRUPT;
66#endif
67	}
68    else
69	{
70#ifdef SA_RESTART
71	    saNew.sa_flags |= SA_RESTART;
72#endif
73	}
74
75    if (sigaction(iSig, &saNew, &saOld) < 0)
76	return(SIG_ERR);
77
78    return(saOld.sa_handler);
79}
80#endif
81