1 /*- 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 /*static char *sccsid = "from: @(#)sigsetops.c 5.3 (Berkeley) 2/23/91";*/ 36 static char *rcsid = "$Id: sigsetops.c,v 1.7 1994/02/07 04:47:49 proven Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <sys/signal.h> 40 #include <errno.h> 41 42 #undef sigemptyset 43 #undef sigfillset 44 #undef sigaddset 45 #undef sigdelset 46 #undef sigismember 47 48 int 49 sigemptyset(set) 50 sigset_t *set; 51 { 52 *set = 0; 53 return (0); 54 } 55 56 int 57 sigfillset(set) 58 sigset_t *set; 59 { 60 *set = ~(sigset_t)0; 61 return (0); 62 } 63 64 int 65 sigaddset(set, signo) 66 sigset_t *set; 67 int signo; 68 { 69 if (signo <= 0 || signo >= NSIG) { 70 errno = EINVAL; 71 return -1; 72 } 73 *set |= sigmask(signo); 74 return (0); 75 } 76 77 int 78 sigdelset(set, signo) 79 sigset_t *set; 80 int signo; 81 { 82 if (signo <= 0 || signo >= NSIG) { 83 errno = EINVAL; 84 return -1; 85 } 86 *set &= ~sigmask(signo); 87 return (0); 88 } 89 90 int 91 sigismember(set, signo) 92 const sigset_t *set; 93 int signo; 94 { 95 if (signo <= 0 || signo >= NSIG) { 96 errno = EINVAL; 97 return -1; 98 } 99 return ((*set & sigmask(signo)) != 0); 100 } 101