usr/src/cmd/make/lib/bsd/bsd.cc

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26
  27 #include <signal.h>
  28
  29 #include <bsd/bsd.h>
  30
  31 /* External references.
  32  */
  33
  34 /* Forward references.
  35  */
  36
  37 /* Static data.
  38  */
  39 \f
  40 extern SIG_PF
  41 bsd_signal (int Signal, SIG_PF Handler)
  42 {
  43   SIG_PF                   previous_handler;
  44 #ifdef sun
  45   previous_handler = sigset (Signal, Handler);
  46 #else
  47   struct sigaction         new_action;
  48   struct sigaction         old_action;
  49
  50   new_action.sa_flags = SA_SIGINFO;
  51   new_action.sa_handler = (void (*) ()) Handler;
  52   (void) sigemptyset (&new_action.sa_mask);
  53   (void) sigaddset (&new_action.sa_mask, Signal);
  54
  55   (void) sigaction (Signal, &new_action, &old_action);
  56
  57   previous_handler = (SIG_PF) old_action.sa_handler;
  58 #endif
  59   return previous_handler;
  60 }
  61 \f
  62 extern void
  63 bsd_signals (void)
  64 {
  65   static int                    initialized = 0;
  66
  67   if (initialized == 0)
  68     {
  69       initialized = 1;
  70     }
  71
  72   return;
  73 }