crypto/external/bsd/heimdal/dist/lib/roken/signal.c

   1 /*      $NetBSD: signal.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $     */
   2
   3 /*
   4  * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <config.h>
  37
  38 #include <signal.h>
  39 #include <krb5/roken.h>
  40
  41 /*
  42  * We would like to always use this signal but there is a link error
  43  * on NEXTSTEP
  44  */
  45 #if !defined(NeXT) && !defined(__APPLE__)
  46 /*
  47  * Bugs:
  48  *
  49  * Do we need any extra hacks for SIGCLD and/or SIGCHLD?
  50  */
  51
  52 ROKEN_LIB_FUNCTION SigAction ROKEN_LIB_CALL
  53 signal(int iSig, SigAction pAction)
  54 {
  55     struct sigaction saNew, saOld;
  56
  57     saNew.sa_handler = pAction;
  58     sigemptyset(&saNew.sa_mask);
  59     saNew.sa_flags = 0;
  60
  61     if (iSig == SIGALRM)
  62         {
  63 #ifdef SA_INTERRUPT
  64             saNew.sa_flags |= SA_INTERRUPT;
  65 #endif
  66         }
  67     else
  68         {
  69 #ifdef SA_RESTART
  70             saNew.sa_flags |= SA_RESTART;
  71 #endif
  72         }
  73
  74     if (sigaction(iSig, &saNew, &saOld) < 0)
  75         return(SIG_ERR);
  76
  77     return(saOld.sa_handler);
  78 }
  79 #endif