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 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 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 "lint.h" 42 #include <sys/types.h> 43 #include <stdio.h> 44 #include <sys/param.h> 45 #include <sys/signal.h> 46 #include <errno.h> 47 #include "libc.h" 48 49 #define SIGSETSIZE 4 50 #define MAXBITNO (NBPW*8) 51 52 static sigset_t sigs; 53 static int sigsinit; 54 55 #define sigword(n) ((n-1)/MAXBITNO) 56 #define bitmask(n) (1L<<((n-1)%MAXBITNO)) 57 58 static int 59 sigvalid(int sig) 60 { 61 if (sig <= 0 || sig > (MAXBITNO * SIGSETSIZE)) 62 return (0); 63 64 if (!sigsinit) { 65 (void) __sigfillset(&sigs); 66 sigsinit++; 67 } 68 69 return ((sigs.__sigbits[sigword(sig)] & bitmask(sig)) != 0); 70 } 71 72 int 73 sigfillset(sigset_t *set) 74 { 75 if (!sigsinit) { 76 (void) __sigfillset(&sigs); 77 sigsinit++; 78 } 79 80 *set = sigs; 81 return (0); 82 } 83 84 int 85 sigemptyset(sigset_t *set) 86 { 87 set->__sigbits[0] = 0; 88 set->__sigbits[1] = 0; 89 set->__sigbits[2] = 0; 90 set->__sigbits[3] = 0; 91 return (0); 92 } 93 94 int 95 sigaddset(sigset_t *set, int sig) 96 { 97 if (!sigvalid(sig)) { 98 errno = EINVAL; 99 return (-1); 100 } 101 set->__sigbits[sigword(sig)] |= bitmask(sig); 102 return (0); 103 } 104 105 int 106 sigdelset(sigset_t *set, int sig) 107 { 108 if (!sigvalid(sig)) { 109 errno = EINVAL; 110 return (-1); 111 } 112 set->__sigbits[sigword(sig)] &= ~bitmask(sig); 113 return (0); 114 } 115 116 int 117 sigismember(const sigset_t *set, int sig) 118 { 119 if (!sigvalid(sig)) { 120 errno = EINVAL; 121 return (-1); 122 } 123 return ((set->__sigbits[sigword(sig)] & bitmask(sig)) != 0); 124 } 125