1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * ssignal, gsignal: software signals 35 */ 36 #pragma weak gsignal = _gsignal 37 #pragma weak ssignal = _ssignal 38 39 #include "synonyms.h" 40 #include <sys/types.h> 41 #include <signal.h> 42 43 /* Highest allowable user signal number */ 44 #define MAXSIGNUM 17 45 46 /* Lowest allowable signal number (lowest user number is always 1) */ 47 #define MINSIG (-4) 48 49 /* Table of signal values */ 50 static int (*sigs[MAXSIGNUM-MINSIG+1])(int); 51 52 int (* 53 ssignal(int sig, int (*action)(int)))(int) 54 { 55 int (*savefn)(int); 56 57 if (sig >= MINSIG && sig <= MAXSIGNUM) { 58 savefn = sigs[sig-MINSIG]; 59 sigs[sig-MINSIG] = action; 60 } else 61 savefn = (int(*)(int))SIG_DFL; 62 63 return (savefn); 64 } 65 66 int 67 gsignal(int sig) 68 { 69 int (*sigfn)(int); 70 71 if (sig < MINSIG || sig > MAXSIGNUM || 72 (sigfn = sigs[sig-MINSIG]) == (int(*)(int))SIG_DFL) 73 return (0); 74 else if (sigfn == (int(*)(int))SIG_IGN) 75 return (1); 76 else { 77 sigs[sig-MINSIG] = (int(*)(int))SIG_DFL; 78 return ((*sigfn)(sig)); 79 } 80 } 81