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 1987 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27/* Copyright (c) 1984 AT&T */ 28/* All Rights Reserved */ 29 30#pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.2 */ 31 32/*LINTLIBRARY*/ 33/* 34 * ssignal, gsignal: software signals 35 */ 36#include <signal.h> 37 38/* Highest allowable user signal number */ 39#define MAXSIG NSIG 40 41/* Lowest allowable signal number (lowest user number is always 1) */ 42#define MINSIG (-4) 43 44/* Table of signal values */ 45typedef int (*sigfunc)(); 46sigfunc *ssigp; 47 48 49sigfunc * 50_ssig() 51{ 52 if (ssigp == 0) 53 ssigp = (sigfunc *)calloc(MAXSIG-MINSIG+1, sizeof (sigfunc)); 54 return (ssigp); 55} 56 57int 58(*ssignal(sig, fn))() 59register int sig, (*fn)(); 60{ 61 register int (*savefn)(); 62 register sigfunc *sp = _ssig(); 63 64 if (sp == 0) 65 return ((int (*)())SIG_DFL); 66 if (sig >= MINSIG && sig <= MAXSIG) { 67 savefn = sp[sig-MINSIG]; 68 sp[sig-MINSIG] = fn; 69 } else 70 savefn = (int (*)())SIG_DFL; 71 72 return (savefn); 73} 74 75int 76gsignal(sig) 77register int sig; 78{ 79 register int (*sigfn)(); 80 register sigfunc *sp = _ssig(); 81 82 if (sp == 0) 83 return (0); 84 if (sig < MINSIG || sig > MAXSIG || 85 (sigfn = sp[sig-MINSIG]) == (int (*)())SIG_DFL) 86 return (0); 87 else if (sigfn == (int (*)())SIG_IGN) 88 return (1); 89 else { 90 sp[sig-MINSIG] = (int (*)())SIG_DFL; 91 return ((*sigfn)(sig)); 92 } 93} 94