7dc859a5f3
These functions (sigandset, sigisemptyset, sigorset) are commonly available in at least musl libc and glibc; sigorset, at least, has proven quite useful in qemu-bsd-user work for tracking the current process signal mask in a more self-documenting/aesthetically pleasing manner. Reviewed by: bapt, jilles, pfg MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D22187
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__SCCSID("@(#)sigsetops.c 8.1 (Berkeley) 6/4/93");
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__FBSDID("$FreeBSD$");
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#include <errno.h>
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#include <signal.h>
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int
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sigaddset(sigset_t *set, int signo)
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{
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if (signo <= 0 || signo > _SIG_MAXSIG) {
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errno = EINVAL;
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return (-1);
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}
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set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
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return (0);
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}
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int
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sigdelset(sigset_t *set, int signo)
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{
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if (signo <= 0 || signo > _SIG_MAXSIG) {
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errno = EINVAL;
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return (-1);
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}
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set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
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return (0);
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}
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int
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sigemptyset(sigset_t *set)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++)
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set->__bits[i] = 0;
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return (0);
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}
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int
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sigfillset(sigset_t *set)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++)
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set->__bits[i] = ~0U;
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return (0);
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}
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int
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sigorset(sigset_t *dest, const sigset_t *left, const sigset_t *right)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++)
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dest->__bits[i] = left->__bits[i] | right->__bits[i];
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return (0);
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}
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int
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sigandset(sigset_t *dest, const sigset_t *left, const sigset_t *right)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++)
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dest->__bits[i] = left->__bits[i] & right->__bits[i];
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return (0);
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}
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int
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sigisemptyset(const sigset_t *set)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++)
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if (set->__bits[i] != 0)
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return (0);
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return (1);
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}
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int
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sigismember(const sigset_t *set, int signo)
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{
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if (signo <= 0 || signo > _SIG_MAXSIG) {
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errno = EINVAL;
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return (-1);
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}
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return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
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}
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