17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57257d1b4Sraf * Common Development and Distribution License (the "License"). 67257d1b4Sraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217257d1b4Sraf 227c478bd9Sstevel@tonic-gate /* 237257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 28*adc04c2dSToomas Soome /* All Rights Reserved */ 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate /* 317c478bd9Sstevel@tonic-gate * ssignal, gsignal: software signals 327c478bd9Sstevel@tonic-gate */ 337c478bd9Sstevel@tonic-gate 347257d1b4Sraf #include "lint.h" 357c478bd9Sstevel@tonic-gate #include <sys/types.h> 367c478bd9Sstevel@tonic-gate #include <signal.h> 377c478bd9Sstevel@tonic-gate 387c478bd9Sstevel@tonic-gate /* Highest allowable user signal number */ 397c478bd9Sstevel@tonic-gate #define MAXSIGNUM 17 407c478bd9Sstevel@tonic-gate 417c478bd9Sstevel@tonic-gate /* Lowest allowable signal number (lowest user number is always 1) */ 427c478bd9Sstevel@tonic-gate #define MINSIG (-4) 437c478bd9Sstevel@tonic-gate 447c478bd9Sstevel@tonic-gate /* Table of signal values */ 457c478bd9Sstevel@tonic-gate static int (*sigs[MAXSIGNUM-MINSIG+1])(int); 467c478bd9Sstevel@tonic-gate 477c478bd9Sstevel@tonic-gate int (* ssignal(int sig,int (* action)(int))487c478bd9Sstevel@tonic-gatessignal(int sig, int (*action)(int)))(int) 497c478bd9Sstevel@tonic-gate { 507c478bd9Sstevel@tonic-gate int (*savefn)(int); 517c478bd9Sstevel@tonic-gate 527c478bd9Sstevel@tonic-gate if (sig >= MINSIG && sig <= MAXSIGNUM) { 537c478bd9Sstevel@tonic-gate savefn = sigs[sig-MINSIG]; 547c478bd9Sstevel@tonic-gate sigs[sig-MINSIG] = action; 55*adc04c2dSToomas Soome } else { 56*adc04c2dSToomas Soome savefn = (int(*)(int))(uintptr_t)SIG_DFL; 57*adc04c2dSToomas Soome } 587c478bd9Sstevel@tonic-gate 597c478bd9Sstevel@tonic-gate return (savefn); 607c478bd9Sstevel@tonic-gate } 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate int gsignal(int sig)637c478bd9Sstevel@tonic-gategsignal(int sig) 647c478bd9Sstevel@tonic-gate { 657c478bd9Sstevel@tonic-gate int (*sigfn)(int); 667c478bd9Sstevel@tonic-gate 677c478bd9Sstevel@tonic-gate if (sig < MINSIG || sig > MAXSIGNUM || 68*adc04c2dSToomas Soome (sigfn = sigs[sig-MINSIG]) == (int(*)(int))(uintptr_t)SIG_DFL) { 697c478bd9Sstevel@tonic-gate return (0); 70*adc04c2dSToomas Soome } else { 71*adc04c2dSToomas Soome if (sigfn == (int(*)(int))(uintptr_t)SIG_IGN) { 72*adc04c2dSToomas Soome return (1); 73*adc04c2dSToomas Soome } else { 74*adc04c2dSToomas Soome sigs[sig-MINSIG] = (int(*)(int))(uintptr_t)SIG_DFL; 75*adc04c2dSToomas Soome return ((*sigfn)(sig)); 76*adc04c2dSToomas Soome } 777c478bd9Sstevel@tonic-gate } 787c478bd9Sstevel@tonic-gate } 79