lib/libc/compat/sys/compat_sigaltstack.c

   1 /*      $NetBSD: compat_sigaltstack.c,v 1.5 2012/03/20 17:06:00 matt Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Klaus Klein.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  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  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 __RCSID("$NetBSD: compat_sigaltstack.c,v 1.5 2012/03/20 17:06:00 matt Exp $");
  35 #endif /* LIBC_SCCS and not lint */
  36
  37 #define __LIBC12_SOURCE__
  38
  39 #include <limits.h>
  40 #include <sys/time.h>
  41 #include <compat/sys/time.h>
  42 #include <signal.h>
  43 #include <compat/include/signal.h>
  44 #include <stddef.h>
  45
  46 int
  47 sigaltstack(const struct sigaltstack13 *onss, struct sigaltstack13 *ooss)
  48 {
  49         stack_t nss, oss;
  50         int error;
  51
  52         nss.ss_sp = onss->ss_sp;
  53         nss.ss_size = onss->ss_size;
  54         nss.ss_flags = onss->ss_flags;
  55
  56         error = __sigaltstack14(&nss, &oss);
  57
  58         if (error == 0 && ooss != NULL) {
  59                 ooss->ss_sp = oss.ss_sp;
  60                 if (oss.ss_size > INT_MAX)
  61                         ooss->ss_size = INT_MAX;
  62                 else
  63                         ooss->ss_size = (int)oss.ss_size;
  64                 ooss->ss_flags = oss.ss_flags;
  65         }
  66
  67         return (error);
  68 }