xref: /illumos-gate/usr/src/lib/libc/port/gen/sigsetops.c (revision 7257d1b4)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
58cd45542Sraf  * Common Development and Distribution License (the "License").
68cd45542Sraf  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
218cd45542Sraf 
227c478bd9Sstevel@tonic-gate /*
238cd45542Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277c478bd9Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
287c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
297c478bd9Sstevel@tonic-gate 
30*7257d1b4Sraf #pragma ident	"%Z%%M%	%I%	%E% SMI"
31*7257d1b4Sraf 
327c478bd9Sstevel@tonic-gate /*
337c478bd9Sstevel@tonic-gate  * POSIX signal manipulation functions.
347c478bd9Sstevel@tonic-gate  */
35*7257d1b4Sraf #pragma weak _sigfillset = sigfillset
36*7257d1b4Sraf #pragma weak _sigemptyset = sigemptyset
37*7257d1b4Sraf #pragma weak _sigaddset = sigaddset
38*7257d1b4Sraf #pragma weak _sigdelset = sigdelset
39*7257d1b4Sraf #pragma weak _sigismember = sigismember
407c478bd9Sstevel@tonic-gate 
41*7257d1b4Sraf #include "lint.h"
427c478bd9Sstevel@tonic-gate #include <sys/types.h>
437c478bd9Sstevel@tonic-gate #include <stdio.h>
447c478bd9Sstevel@tonic-gate #include <sys/param.h>
457c478bd9Sstevel@tonic-gate #include <sys/signal.h>
467c478bd9Sstevel@tonic-gate #include <errno.h>
477c478bd9Sstevel@tonic-gate #include "libc.h"
487c478bd9Sstevel@tonic-gate 
497c478bd9Sstevel@tonic-gate #define	SIGSETSIZE	4
507c478bd9Sstevel@tonic-gate #define	MAXBITNO (NBPW*8)
517c478bd9Sstevel@tonic-gate 
527c478bd9Sstevel@tonic-gate static sigset_t sigs;
537c478bd9Sstevel@tonic-gate static int sigsinit;
547c478bd9Sstevel@tonic-gate 
557c478bd9Sstevel@tonic-gate #define	sigword(n) ((n-1)/MAXBITNO)
567c478bd9Sstevel@tonic-gate #define	bitmask(n) (1L<<((n-1)%MAXBITNO))
577c478bd9Sstevel@tonic-gate 
587c478bd9Sstevel@tonic-gate static int
sigvalid(int sig)597c478bd9Sstevel@tonic-gate sigvalid(int sig)
607c478bd9Sstevel@tonic-gate {
617c478bd9Sstevel@tonic-gate 	if (sig <= 0 || sig > (MAXBITNO * SIGSETSIZE))
627c478bd9Sstevel@tonic-gate 		return (0);
637c478bd9Sstevel@tonic-gate 
647c478bd9Sstevel@tonic-gate 	if (!sigsinit) {
657c478bd9Sstevel@tonic-gate 		(void) __sigfillset(&sigs);
667c478bd9Sstevel@tonic-gate 		sigsinit++;
677c478bd9Sstevel@tonic-gate 	}
687c478bd9Sstevel@tonic-gate 
697c478bd9Sstevel@tonic-gate 	return ((sigs.__sigbits[sigword(sig)] & bitmask(sig)) != 0);
707c478bd9Sstevel@tonic-gate }
717c478bd9Sstevel@tonic-gate 
727c478bd9Sstevel@tonic-gate int
sigfillset(sigset_t * set)737c478bd9Sstevel@tonic-gate sigfillset(sigset_t *set)
747c478bd9Sstevel@tonic-gate {
757c478bd9Sstevel@tonic-gate 	if (!sigsinit) {
767c478bd9Sstevel@tonic-gate 		(void) __sigfillset(&sigs);
777c478bd9Sstevel@tonic-gate 		sigsinit++;
787c478bd9Sstevel@tonic-gate 	}
797c478bd9Sstevel@tonic-gate 
807c478bd9Sstevel@tonic-gate 	*set = sigs;
817c478bd9Sstevel@tonic-gate 	return (0);
827c478bd9Sstevel@tonic-gate }
837c478bd9Sstevel@tonic-gate 
847c478bd9Sstevel@tonic-gate int
sigemptyset(sigset_t * set)857c478bd9Sstevel@tonic-gate sigemptyset(sigset_t *set)
867c478bd9Sstevel@tonic-gate {
877c478bd9Sstevel@tonic-gate 	set->__sigbits[0] = 0;
887c478bd9Sstevel@tonic-gate 	set->__sigbits[1] = 0;
897c478bd9Sstevel@tonic-gate 	set->__sigbits[2] = 0;
907c478bd9Sstevel@tonic-gate 	set->__sigbits[3] = 0;
917c478bd9Sstevel@tonic-gate 	return (0);
927c478bd9Sstevel@tonic-gate }
937c478bd9Sstevel@tonic-gate 
947c478bd9Sstevel@tonic-gate int
sigaddset(sigset_t * set,int sig)957c478bd9Sstevel@tonic-gate sigaddset(sigset_t *set, int sig)
967c478bd9Sstevel@tonic-gate {
977c478bd9Sstevel@tonic-gate 	if (!sigvalid(sig)) {
987c478bd9Sstevel@tonic-gate 		errno = EINVAL;
997c478bd9Sstevel@tonic-gate 		return (-1);
1007c478bd9Sstevel@tonic-gate 	}
1017c478bd9Sstevel@tonic-gate 	set->__sigbits[sigword(sig)] |= bitmask(sig);
1027c478bd9Sstevel@tonic-gate 	return (0);
1037c478bd9Sstevel@tonic-gate }
1047c478bd9Sstevel@tonic-gate 
1057c478bd9Sstevel@tonic-gate int
sigdelset(sigset_t * set,int sig)1067c478bd9Sstevel@tonic-gate sigdelset(sigset_t *set, int sig)
1077c478bd9Sstevel@tonic-gate {
1087c478bd9Sstevel@tonic-gate 	if (!sigvalid(sig)) {
1097c478bd9Sstevel@tonic-gate 		errno = EINVAL;
1107c478bd9Sstevel@tonic-gate 		return (-1);
1117c478bd9Sstevel@tonic-gate 	}
1127c478bd9Sstevel@tonic-gate 	set->__sigbits[sigword(sig)] &= ~bitmask(sig);
1137c478bd9Sstevel@tonic-gate 	return (0);
1147c478bd9Sstevel@tonic-gate }
1157c478bd9Sstevel@tonic-gate 
1167c478bd9Sstevel@tonic-gate int
sigismember(const sigset_t * set,int sig)1177c478bd9Sstevel@tonic-gate sigismember(const sigset_t *set, int sig)
1187c478bd9Sstevel@tonic-gate {
1197c478bd9Sstevel@tonic-gate 	if (!sigvalid(sig)) {
1207c478bd9Sstevel@tonic-gate 		errno = EINVAL;
1217c478bd9Sstevel@tonic-gate 		return (-1);
1227c478bd9Sstevel@tonic-gate 	}
1237c478bd9Sstevel@tonic-gate 	return ((set->__sigbits[sigword(sig)] & bitmask(sig)) != 0);
1247c478bd9Sstevel@tonic-gate }
125