freebsd-dev/lib/libc/gen/sigsetops.c

95 lines
2.6 KiB
C

/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)sigsetops.c 8.1 (Berkeley) 6/4/93
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)sigsetops.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <errno.h>
#include <signal.h>
int
sigaddset(sigset_t *set, int signo)
{
if (signo <= 0 || signo > _SIG_MAXSIG) {
errno = EINVAL;
return (-1);
}
set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
return (0);
}
int
sigdelset(sigset_t *set, int signo)
{
if (signo <= 0 || signo > _SIG_MAXSIG) {
errno = EINVAL;
return (-1);
}
set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
return (0);
}
int
sigemptyset(sigset_t *set)
{
int i;
for (i = 0; i < _SIG_WORDS; i++)
set->__bits[i] = 0;
return (0);
}
int
sigfillset(sigset_t *set)
{
int i;
for (i = 0; i < _SIG_WORDS; i++)
set->__bits[i] = ~0U;
return (0);
}
int
sigismember(const sigset_t *set, int signo)
{
if (signo <= 0 || signo > _SIG_MAXSIG) {
errno = EINVAL;
return (-1);
}
return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
}