lib/libc/gen/sigsetops.c

   1 /*-
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)sigsetops.c 8.1 (Berkeley) 6/4/93
  30  *
  31  * @(#)sigsetops.c      8.1 (Berkeley) 6/4/93
  32  * $FreeBSD: src/lib/libc/gen/sigsetops.c,v 1.7 1999/10/02 19:37:14 marcel Exp $
  33  * $DragonFly: src/lib/libc/gen/sigsetops.c,v 1.3 2005/11/13 00:07:42 swildner Exp $
  34  */
  35
  36 #include <errno.h>
  37 #include <signal.h>
  38
  39 int
  40 sigaddset(sigset_t *set, int signo)
  41 {
  42
  43         if (signo <= 0 || signo > _SIG_MAXSIG) {
  44                 errno = EINVAL;
  45                 return (-1);
  46         }
  47         set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
  48         return (0);
  49 }
  50
  51 int
  52 sigdelset(sigset_t *set, int signo)
  53 {
  54
  55         if (signo <= 0 || signo > _SIG_MAXSIG) {
  56                 errno = EINVAL;
  57                 return (-1);
  58         }
  59         set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
  60         return (0);
  61 }
  62
  63 int
  64 sigemptyset(sigset_t *set)
  65 {
  66         int i;
  67
  68         for (i = 0; i < _SIG_WORDS; i++)
  69                 set->__bits[i] = 0;
  70         return (0);
  71 }
  72
  73 int
  74 sigfillset(sigset_t *set)
  75 {
  76         int i;
  77
  78         for (i = 0; i < _SIG_WORDS; i++)
  79                 set->__bits[i] = ~0U;
  80         return (0);
  81 }
  82
  83 int
  84 sigismember(const sigset_t *set, int signo)
  85 {
  86
  87         if (signo <= 0 || signo > _SIG_MAXSIG) {
  88                 errno = EINVAL;
  89                 return (-1);
  90         }
  91         return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
  92 }