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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 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 * POSIX signal manipulation functions. 34 */ 35 #pragma weak sigfillset = _sigfillset 36 #pragma weak sigemptyset = _sigemptyset 37 #pragma weak sigaddset = _sigaddset 38 #pragma weak sigdelset = _sigdelset 39 #pragma weak sigismember = _sigismember 40 41 #include "synonyms.h" 42 #include <sys/types.h> 43 #include <stdio.h> 44 #include <sys/param.h> 45 #include <sys/errno.h> 46 #include <sys/signal.h> 47 #include <errno.h> 48 #include "libc.h" 49 50 #define SIGSETSIZE 4 51 #define MAXBITNO (NBPW*8) 52 53 static sigset_t sigs; 54 static int sigsinit; 55 56 #define sigword(n) ((n-1)/MAXBITNO) 57 #define bitmask(n) (1L<<((n-1)%MAXBITNO)) 58 59 static int 60 sigvalid(int sig) 61 { 62 if (sig <= 0 || sig > (MAXBITNO * SIGSETSIZE)) 63 return (0); 64 65 if (!sigsinit) { 66 (void) __sigfillset(&sigs); 67 sigsinit++; 68 } 69 70 return ((sigs.__sigbits[sigword(sig)] & bitmask(sig)) != 0); 71 } 72 73 int 74 sigfillset(sigset_t *set) 75 { 76 if (!sigsinit) { 77 (void) __sigfillset(&sigs); 78 sigsinit++; 79 } 80 81 *set = sigs; 82 return (0); 83 } 84 85 int 86 sigemptyset(sigset_t *set) 87 { 88 set->__sigbits[0] = 0; 89 set->__sigbits[1] = 0; 90 set->__sigbits[2] = 0; 91 set->__sigbits[3] = 0; 92 return (0); 93 } 94 95 int 96 sigaddset(sigset_t *set, int sig) 97 { 98 if (!sigvalid(sig)) { 99 errno = EINVAL; 100 return (-1); 101 } 102 set->__sigbits[sigword(sig)] |= bitmask(sig); 103 return (0); 104 } 105 106 int 107 sigdelset(sigset_t *set, int sig) 108 { 109 if (!sigvalid(sig)) { 110 errno = EINVAL; 111 return (-1); 112 } 113 set->__sigbits[sigword(sig)] &= ~bitmask(sig); 114 return (0); 115 } 116 117 int 118 sigismember(const sigset_t *set, int sig) 119 { 120 if (!sigvalid(sig)) { 121 errno = EINVAL; 122 return (-1); 123 } 124 return ((set->__sigbits[sigword(sig)] & bitmask(sig)) != 0); 125 } 126