openbsd-compat/sigact.c

   1 /* OPENBSD ORIGINAL: lib/libcurses/base/sigaction.c */
   2
   3 /*      $OpenBSD: sigaction.c,v 1.3 1999/06/27 08:14:21 millert Exp $   */
   4
   5 /****************************************************************************
   6  * Copyright (c) 1998 Free Software Foundation, Inc.                        *
   7  *                                                                          *
   8  * Permission is hereby granted, free of charge, to any person obtaining a  *
   9  * copy of this software and associated documentation files (the            *
  10  * "Software"), to deal in the Software without restriction, including      *
  11  * without limitation the rights to use, copy, modify, merge, publish,      *
  12  * distribute, distribute with modifications, sublicense, and/or sell       *
  13  * copies of the Software, and to permit persons to whom the Software is    *
  14  * furnished to do so, subject to the following conditions:                 *
  15  *                                                                          *
  16  * The above copyright notice and this permission notice shall be included  *
  17  * in all copies or substantial portions of the Software.                   *
  18  *                                                                          *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  22  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  23  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  24  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  25  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  26  *                                                                          *
  27  * Except as contained in this notice, the name(s) of the above copyright   *
  28  * holders shall not be used in advertising or otherwise to promote the     *
  29  * sale, use or other dealings in this Software without prior written       *
  30  * authorization.                                                           *
  31  ****************************************************************************/
  32
  33 /****************************************************************************
  34  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  35  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  36  ****************************************************************************/
  37
  38 #include "includes.h"
  39 #include <signal.h>
  40 #include "sigact.h"
  41
  42 /* This file provides sigaction() emulation using sigvec() */
  43 /* Use only if this is non POSIX system */
  44
  45 #if !HAVE_SIGACTION && HAVE_SIGVEC
  46
  47 int
  48 sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact)
  49 {
  50         return sigvec(sig, &(sigact->sv), &(osigact->sv));
  51 }
  52
  53 int
  54 sigemptyset (sigset_t * mask)
  55 {
  56         *mask = 0;
  57         return 0;
  58 }
  59
  60 int
  61 sigprocmask (int mode, sigset_t * mask, sigset_t * omask)
  62 {
  63         sigset_t current = sigsetmask(0);
  64
  65         if (omask) *omask = current;
  66
  67         if (mode==SIG_BLOCK)
  68                 current |= *mask;
  69         else if (mode==SIG_UNBLOCK)
  70                 current &= ~*mask;
  71         else if (mode==SIG_SETMASK)
  72         current = *mask;
  73
  74         sigsetmask(current);
  75         return 0;
  76 }
  77
  78 int
  79 sigsuspend (sigset_t * mask)
  80 {
  81         return sigpause(*mask);
  82 }
  83
  84 int
  85 sigdelset (sigset_t * mask, int sig)
  86 {
  87         *mask &= ~sigmask(sig);
  88         return 0;
  89 }
  90
  91 int
  92 sigaddset (sigset_t * mask, int sig)
  93 {
  94         *mask |= sigmask(sig);
  95         return 0;
  96 }
  97
  98 int
  99 sigismember (sigset_t * mask, int sig)
 100 {
 101         return (*mask & sigmask(sig)) != 0;
 102 }
 103
 104 #endif