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 /* 31 * POSIX signal manipulation functions. 32 */ 33 #pragma weak _sigfillset = sigfillset 34 #pragma weak _sigemptyset = sigemptyset 35 #pragma weak _sigaddset = sigaddset 36 #pragma weak _sigdelset = sigdelset 37 #pragma weak _sigismember = sigismember 38 39 #include "lint.h" 40 #include <sys/types.h> 41 #include <stdio.h> 42 #include <sys/param.h> 43 #include <sys/signal.h> 44 #include <errno.h> 45 #include "libc.h" 46 47 #define SIGSETSIZE 4 48 #define MAXBITNO (NBPW*8) 49 50 static sigset_t sigs; 51 static int sigsinit; 52 53 #define sigword(n) ((n-1)/MAXBITNO) 54 #define bitmask(n) (1L<<((n-1)%MAXBITNO)) 55 56 static int 57 sigvalid(int sig) 58 { 59 if (sig <= 0 || sig > (MAXBITNO * SIGSETSIZE)) 60 return (0); 61 62 if (!sigsinit) { 63 (void) __sigfillset(&sigs); 64 sigsinit++; 65 } 66 67 return ((sigs.__sigbits[sigword(sig)] & bitmask(sig)) != 0); 68 } 69 70 int 71 sigfillset(sigset_t *set) 72 { 73 if (!sigsinit) { 74 (void) __sigfillset(&sigs); 75 sigsinit++; 76 } 77 78 *set = sigs; 79 return (0); 80 } 81 82 int 83 sigemptyset(sigset_t *set) 84 { 85 set->__sigbits[0] = 0; 86 set->__sigbits[1] = 0; 87 set->__sigbits[2] = 0; 88 set->__sigbits[3] = 0; 89 return (0); 90 } 91 92 int 93 sigaddset(sigset_t *set, int sig) 94 { 95 if (!sigvalid(sig)) { 96 errno = EINVAL; 97 return (-1); 98 } 99 set->__sigbits[sigword(sig)] |= bitmask(sig); 100 return (0); 101 } 102 103 int 104 sigdelset(sigset_t *set, int sig) 105 { 106 if (!sigvalid(sig)) { 107 errno = EINVAL; 108 return (-1); 109 } 110 set->__sigbits[sigword(sig)] &= ~bitmask(sig); 111 return (0); 112 } 113 114 int 115 sigismember(const sigset_t *set, int sig) 116 { 117 if (!sigvalid(sig)) { 118 errno = EINVAL; 119 return (-1); 120 } 121 return ((set->__sigbits[sigword(sig)] & bitmask(sig)) != 0); 122 } 123