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> 36 RCSID("$Id: signal.c,v 1.12 2000/07/08 12:39:06 assar Exp $"); 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 53 SigAction 54 signal(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