openbsd-compat/sigact.c

   1 /*      $OpenBSD: sigaction.c,v 1.4 2001/01/22 18:01:48 millert Exp $   */
   2
   3 /****************************************************************************
   4  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
   5  *                                                                          *
   6  * Permission is hereby granted, free of charge, to any person obtaining a  *
   7  * copy of this software and associated documentation files (the            *
   8  * "Software"), to deal in the Software without restriction, including      *
   9  * without limitation the rights to use, copy, modify, merge, publish,      *
  10  * distribute, distribute with modifications, sublicense, and/or sell       *
  11  * copies of the Software, and to permit persons to whom the Software is    *
  12  * furnished to do so, subject to the following conditions:                 *
  13  *                                                                          *
  14  * The above copyright notice and this permission notice shall be included  *
  15  * in all copies or substantial portions of the Software.                   *
  16  *                                                                          *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  20  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  23  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  24  *                                                                          *
  25  * Except as contained in this notice, the name(s) of the above copyright   *
  26  * holders shall not be used in advertising or otherwise to promote the     *
  27  * sale, use or other dealings in this Software without prior written       *
  28  * authorization.                                                           *
  29  ****************************************************************************/
  30
  31 /****************************************************************************
  32  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  33  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  34  ****************************************************************************/
  35
  36 /* OPENBSD ORIGINAL: lib/libcurses/base/sigaction.c */
  37
  38 #include "includes.h"
  39 #include <errno.h>
  40 #include <signal.h>
  41 #include "sigact.h"
  42
  43 /* This file provides sigaction() emulation using sigvec() */
  44 /* Use only if this is non POSIX system */
  45
  46 #if !HAVE_SIGACTION && HAVE_SIGVEC
  47
  48 int
  49 sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact)
  50 {
  51         return sigvec(sig, sigact ? &sigact->sv : NULL,
  52             osigact ? &osigact->sv : NULL);
  53 }
  54
  55 int
  56 sigemptyset (sigset_t *mask)
  57 {
  58         if (!mask) {
  59                 errno = EINVAL;
  60                 return -1;
  61         }
  62         *mask = 0;
  63         return 0;
  64 }
  65
  66 int
  67 sigprocmask (int mode, sigset_t *mask, sigset_t *omask)
  68 {
  69         sigset_t current = sigsetmask(0);
  70
  71         if (!mask) {
  72                 errno = EINVAL;
  73                 return -1;
  74         }
  75
  76         if (omask)
  77                 *omask = current;
  78
  79         if (mode == SIG_BLOCK)
  80                 current |= *mask;
  81         else if (mode == SIG_UNBLOCK)
  82                 current &= ~*mask;
  83         else if (mode == SIG_SETMASK)
  84         current = *mask;
  85
  86         sigsetmask(current);
  87         return 0;
  88 }
  89
  90 int
  91 sigsuspend (sigset_t *mask)
  92 {
  93         if (!mask) {
  94                 errno = EINVAL;
  95                 return -1;
  96         }
  97         return sigpause(*mask);
  98 }
  99
 100 int
 101 sigdelset (sigset_t *mask, int sig)
 102 {
 103         if (!mask) {
 104                 errno = EINVAL;
 105                 return -1;
 106         }
 107         *mask &= ~sigmask(sig);
 108         return 0;
 109 }
 110
 111 int
 112 sigaddset (sigset_t *mask, int sig)
 113 {
 114         if (!mask) {
 115                 errno = EINVAL;
 116                 return -1;
 117         }
 118         *mask |= sigmask(sig);
 119         return 0;
 120 }
 121
 122 int
 123 sigismember (sigset_t *mask, int sig)
 124 {
 125         if (!mask) {
 126                 errno = EINVAL;
 127                 return -1;
 128         }
 129         return (*mask & sigmask(sig)) != 0;
 130 }
 131
 132 #endif