1 /* 2 * Copyright (c) 1995, 1996, 1997 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> 36 RCSID("$Id: signal.c,v 1.10 1999/12/14 01:37:58 assar Exp $"); 37 #endif 38 39 #include <signal.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 typedef RETSIGTYPE (*SigAction)(/* int??? */); 53 54 SigAction 55 signal(int iSig, SigAction pAction) 56 { 57 struct sigaction saNew, saOld; 58 59 saNew.sa_handler = pAction; 60 sigemptyset(&saNew.sa_mask); 61 saNew.sa_flags = 0; 62 63 if (iSig == SIGALRM) 64 { 65 #ifdef SA_INTERRUPT 66 saNew.sa_flags |= SA_INTERRUPT; 67 #endif 68 } 69 else 70 { 71 #ifdef SA_RESTART 72 saNew.sa_flags |= SA_RESTART; 73 #endif 74 } 75 76 if (sigaction(iSig, &saNew, &saOld) < 0) 77 return(SIG_ERR); 78 79 return(saOld.sa_handler); 80 } 81 #endif 82