1                 : /*
       2                 :  * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
       3                 :  * (Royal Institute of Technology, Stockholm, Sweden).
       4                 :  * All rights reserved.
       5                 :  *
       6                 :  * Redistribution and use in source and binary forms, with or without
       7                 :  * modification, are permitted provided that the following conditions
       8                 :  * are met:
       9                 :  *
      10                 :  * 1. Redistributions of source code must retain the above copyright
      11                 :  *    notice, this list of conditions and the following disclaimer.
      12                 :  *
      13                 :  * 2. Redistributions in binary form must reproduce the above copyright
      14                 :  *    notice, this list of conditions and the following disclaimer in the
      15                 :  *    documentation and/or other materials provided with the distribution.
      16                 :  *
      17                 :  * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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                 : 
      34                 : #include <config.h>
      35                 : 
      36                 : #include <signal.h>
      37                 : #include "roken.h"
      38                 : 
      39                 : /*
      40                 :  * We would like to always use this signal but there is a link error
      41                 :  * on NEXTSTEP
      42                 :  */
      43                 : #if !defined(NeXT) && !defined(__APPLE__)
      44                 : /*
      45                 :  * Bugs:
      46                 :  *
      47                 :  * Do we need any extra hacks for SIGCLD and/or SIGCHLD?
      48                 :  */
      49                 : 
      50                 : ROKEN_LIB_FUNCTION SigAction ROKEN_LIB_CALL
      51                 : signal(int iSig, SigAction pAction)
      52               0 : {
      53                 :     struct sigaction saNew, saOld;
      54                 : 
      55               0 :     saNew.sa_handler = pAction;
      56               0 :     sigemptyset(&saNew.sa_mask);
      57               0 :     saNew.sa_flags = 0;
      58                 : 
      59               0 :     if (iSig == SIGALRM)
      60                 :         {
      61                 : #ifdef SA_INTERRUPT
      62               0 :             saNew.sa_flags |= SA_INTERRUPT;
      63                 : #endif
      64                 :         }
      65                 :     else
      66                 :         {
      67                 : #ifdef SA_RESTART
      68               0 :             saNew.sa_flags |= SA_RESTART;
      69                 : #endif
      70                 :         }
      71                 : 
      72               0 :     if (sigaction(iSig, &saNew, &saOld) < 0)
      73               0 :         return(SIG_ERR);
      74                 : 
      75               0 :     return(saOld.sa_handler);
      76                 : }
      77                 : #endif