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. 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  *      @(#)sigsetops.c 8.1 (Berkeley) 6/4/93
  34  *
  35  * @(#)sigsetops.c      8.1 (Berkeley) 6/4/93
  36  * $FreeBSD: src/lib/libc/gen/sigsetops.c,v 1.7 1999/10/02 19:37:14 marcel Exp $
  37  * $DragonFly: src/lib/libc/gen/sigsetops.c,v 1.3 2005/11/13 00:07:42 swildner Exp $
  38  */
  39
  40 #include <errno.h>
  41 #include <signal.h>
  42
  43 int
  44 sigaddset(sigset_t *set, int signo)
  45 {
  46
  47         if (signo <= 0 || signo > _SIG_MAXSIG) {
  48                 errno = EINVAL;
  49                 return (-1);
  50         }
  51         set->__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo);
  52         return (0);
  53 }
  54
  55 int
  56 sigdelset(sigset_t *set, int signo)
  57 {
  58
  59         if (signo <= 0 || signo > _SIG_MAXSIG) {
  60                 errno = EINVAL;
  61                 return (-1);
  62         }
  63         set->__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo);
  64         return (0);
  65 }
  66
  67 int
  68 sigemptyset(sigset_t *set)
  69 {
  70         int i;
  71
  72         for (i = 0; i < _SIG_WORDS; i++)
  73                 set->__bits[i] = 0;
  74         return (0);
  75 }
  76
  77 int
  78 sigfillset(sigset_t *set)
  79 {
  80         int i;
  81
  82         for (i = 0; i < _SIG_WORDS; i++)
  83                 set->__bits[i] = ~0U;
  84         return (0);
  85 }
  86
  87 int
  88 sigismember(const sigset_t *set, int signo)
  89 {
  90
  91         if (signo <= 0 || signo > _SIG_MAXSIG) {
  92                 errno = EINVAL;
  93                 return (-1);
  94         }
  95         return ((set->__bits[_SIG_WORD(signo)] & _SIG_BIT(signo)) ? 1 : 0);
  96 }