1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <errno.h> 33 #include <signal.h> 34 35 int 36 sigaddset(sigset_t *set, int signo) 37 { 38 39 if (signo <= 0 || signo > _SIG_MAXSIG) { 40 errno = EINVAL; 41 return (-1); 42 } 43 set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo); 44 return (0); 45 } 46 47 int 48 sigdelset(sigset_t *set, int signo) 49 { 50 51 if (signo <= 0 || signo > _SIG_MAXSIG) { 52 errno = EINVAL; 53 return (-1); 54 } 55 set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo); 56 return (0); 57 } 58 59 int 60 sigemptyset(sigset_t *set) 61 { 62 int i; 63 64 for (i = 0; i < _SIG_WORDS; i++) 65 set->__bits[i] = 0; 66 return (0); 67 } 68 69 int 70 sigfillset(sigset_t *set) 71 { 72 int i; 73 74 for (i = 0; i < _SIG_WORDS; i++) 75 set->__bits[i] = ~0U; 76 return (0); 77 } 78 79 int 80 sigorset(sigset_t *dest, const sigset_t *left, const sigset_t *right) 81 { 82 int i; 83 84 for (i = 0; i < _SIG_WORDS; i++) 85 dest->__bits[i] = left->__bits[i] | right->__bits[i]; 86 return (0); 87 } 88 89 int 90 sigandset(sigset_t *dest, const sigset_t *left, const sigset_t *right) 91 { 92 int i; 93 94 for (i = 0; i < _SIG_WORDS; i++) 95 dest->__bits[i] = left->__bits[i] & right->__bits[i]; 96 return (0); 97 } 98 99 int 100 sigisemptyset(const sigset_t *set) 101 { 102 int i; 103 104 for (i = 0; i < _SIG_WORDS; i++) 105 if (set->__bits[i] != 0) 106 return (0); 107 return (1); 108 } 109 110 int 111 sigismember(const sigset_t *set, int signo) 112 { 113 114 if (signo <= 0 || signo > _SIG_MAXSIG) { 115 errno = EINVAL; 116 return (-1); 117 } 118 return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0); 119 } 120