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sigsetops.c revision 1.9 
      1 /*	$NetBSD: sigsetops.c,v 1.9 1995/02/27 06:21:23 cgd Exp $	*/
      2 
      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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)sigsetops.c	8.1 (Berkeley) 6/4/93
     36  */
     37 
     38 #if defined(LIBC_SCCS) && !defined(lint)
     39 #if 0
     40 static char sccsid[] = "@(#)sigsetops.c	8.1 (Berkeley) 6/4/93";
     41 #else
     42 static char rcsid[] = "$NetBSD";
     43 #endif
     44 #endif /* LIBC_SCCS and not lint */
     45 
     46 #include <errno.h>
     47 #include <signal.h>
     48 
     49 #undef sigemptyset
     50 #undef sigfillset
     51 #undef sigaddset
     52 #undef sigdelset
     53 #undef sigismember
     54 
     55 int
     56 sigemptyset(set)
     57 	sigset_t *set;
     58 {
     59 	*set = 0;
     60 	return (0);
     61 }
     62 
     63 int
     64 sigfillset(set)
     65 	sigset_t *set;
     66 {
     67 	*set = ~(sigset_t)0;
     68 	return (0);
     69 }
     70 
     71 int
     72 sigaddset(set, signo)
     73 	sigset_t *set;
     74 	int signo;
     75 {
     76 	if (signo <= 0 || signo >= NSIG) {
     77 		errno = EINVAL;
     78 		return -1;
     79 	}
     80 	*set |= sigmask(signo);
     81 	return (0);
     82 }
     83 
     84 int
     85 sigdelset(set, signo)
     86 	sigset_t *set;
     87 	int signo;
     88 {
     89 	if (signo <= 0 || signo >= NSIG) {
     90 		errno = EINVAL;
     91 		return -1;
     92 	}
     93 	*set &= ~sigmask(signo);
     94 	return (0);
     95 }
     96 
     97 int
     98 sigismember(set, signo)
     99 	const sigset_t *set;
    100 	int signo;
    101 {
    102 	if (signo <= 0 || signo >= NSIG) {
    103 		errno = EINVAL;
    104 		return -1;
    105 	}
    106 	return ((*set & sigmask(signo)) != 0);
    107 }
    108