1 /* $OpenBSD: sigsetops.c,v 1.6 2010/12/31 02:58:57 guenther Exp $ */ 2 /*- 3 * Copyright (c) 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)sigsetops.c 8.1 (Berkeley) 6/4/93 31 */ 32 33 #define _ANSI_LIBRARY 34 #include <errno.h> 35 #include <signal.h> 36 37 #undef sigemptyset 38 #undef sigfillset 39 #undef sigaddset 40 #undef sigdelset 41 #undef sigismember 42 43 int 44 sigemptyset(sigset_t *set) 45 { 46 *set = 0; 47 return (0); 48 } 49 50 int 51 sigfillset(sigset_t *set) 52 { 53 *set = ~(sigset_t)0; 54 return (0); 55 } 56 57 int 58 sigaddset(sigset_t *set, int signo) 59 { 60 if (signo <= 0 || signo >= NSIG) { 61 errno = EINVAL; 62 return -1; 63 } 64 *set |= sigmask(signo); 65 return (0); 66 } 67 68 int 69 sigdelset(sigset_t *set, int signo) 70 { 71 if (signo <= 0 || signo >= NSIG) { 72 errno = EINVAL; 73 return -1; 74 } 75 *set &= ~sigmask(signo); 76 return (0); 77 } 78 79 int 80 sigismember(const sigset_t *set, int signo) 81 { 82 if (signo <= 0 || signo >= NSIG) { 83 errno = EINVAL; 84 return -1; 85 } 86 return ((*set & sigmask(signo)) != 0); 87 } 88