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 <sys/cdefs.h> 33 __SCCSID("@(#)sigsetops.c 8.1 (Berkeley) 6/4/93"); 34 #include <errno.h> 35 #include <signal.h> 36 37 int 38 sigaddset(sigset_t *set, int signo) 39 { 40 41 if (signo <= 0 || signo > _SIG_MAXSIG) { 42 errno = EINVAL; 43 return (-1); 44 } 45 set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo); 46 return (0); 47 } 48 49 int 50 sigdelset(sigset_t *set, int signo) 51 { 52 53 if (signo <= 0 || signo > _SIG_MAXSIG) { 54 errno = EINVAL; 55 return (-1); 56 } 57 set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo); 58 return (0); 59 } 60 61 int 62 sigemptyset(sigset_t *set) 63 { 64 int i; 65 66 for (i = 0; i < _SIG_WORDS; i++) 67 set->__bits[i] = 0; 68 return (0); 69 } 70 71 int 72 sigfillset(sigset_t *set) 73 { 74 int i; 75 76 for (i = 0; i < _SIG_WORDS; i++) 77 set->__bits[i] = ~0U; 78 return (0); 79 } 80 81 int 82 sigorset(sigset_t *dest, const sigset_t *left, const sigset_t *right) 83 { 84 int i; 85 86 for (i = 0; i < _SIG_WORDS; i++) 87 dest->__bits[i] = left->__bits[i] | right->__bits[i]; 88 return (0); 89 } 90 91 int 92 sigandset(sigset_t *dest, const sigset_t *left, const sigset_t *right) 93 { 94 int i; 95 96 for (i = 0; i < _SIG_WORDS; i++) 97 dest->__bits[i] = left->__bits[i] & right->__bits[i]; 98 return (0); 99 } 100 101 int 102 sigisemptyset(const sigset_t *set) 103 { 104 int i; 105 106 for (i = 0; i < _SIG_WORDS; i++) 107 if (set->__bits[i] != 0) 108 return (0); 109 return (1); 110 } 111 112 int 113 sigismember(const sigset_t *set, int signo) 114 { 115 116 if (signo <= 0 || signo > _SIG_MAXSIG) { 117 errno = EINVAL; 118 return (-1); 119 } 120 return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0); 121 } 122