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sigsetops.c revision 1.7.4.1 
      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 1.7.4.1 1995/04/26 00:15:36 jtc Exp $";
     37 #endif /* LIBC_SCCS and not lint */
     38 
     39 #include <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 __weak_reference(_sigemptyset,sigemptyset);
     56 
     57 int
     58 sigfillset(set)
     59 	sigset_t *set;
     60 {
     61 	*set = ~(sigset_t)0;
     62 	return (0);
     63 }
     64 __weak_reference(_sigfillset,sigfillset);
     65 
     66 int
     67 sigaddset(set, signo)
     68 	sigset_t *set;
     69 	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 __weak_reference(_sigaddset,sigaddset);
     79 
     80 int
     81 sigdelset(set, signo)
     82 	sigset_t *set;
     83 	int signo;
     84 {
     85 	if (signo <= 0 || signo >= NSIG) {
     86 		errno = EINVAL;
     87 		return -1;
     88 	}
     89 	*set &= ~sigmask(signo);
     90 	return (0);
     91 }
     92 __weak_reference(_sigdelset,sigdelset);
     93 
     94 int
     95 sigismember(set, signo)
     96 	const sigset_t *set;
     97 	int signo;
     98 {
     99 	if (signo <= 0 || signo >= NSIG) {
    100 		errno = EINVAL;
    101 		return -1;
    102 	}
    103 	return ((*set & sigmask(signo)) != 0);
    104 }
    105 __weak_reference(_sigismember,sigismember);
    106