compat-43/sigcompat.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1989, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  */
  55
  56
  57 #include <sys/param.h>
  58 #include <signal.h>
  59 #include <errno.h>
  60 #if defined(__DYNAMIC__)
  61 extern int _sigaction_nobind (int sig, const struct sigaction *nsv, struct sigaction *osv);
  62 #endif
  63
  64 static int sigvec__(signo, sv, osv, bind)
  65         int signo;
  66         struct sigvec *sv, *osv;
  67         int bind;
  68 {
  69         int ret;
  70
  71         if (sv)
  72                 sv->sv_flags ^= SV_INTERRUPT;   /* !SA_INTERRUPT */
  73 #if defined(__DYNAMIC__)
  74         if (bind) {
  75 #endif
  76             ret = sigaction(signo, (struct sigaction *)sv, (struct sigaction *)osv);
  77 #if defined(__DYNAMIC__)
  78         } else {
  79             ret = _sigaction_nobind(signo, (struct sigaction *)sv, (struct sigaction *)osv);
  80         }
  81 #endif
  82         if (ret == 0 && osv)
  83                 osv->sv_flags ^= SV_INTERRUPT;  /* !SA_INTERRUPT */
  84         return (ret);
  85 }
  86
  87 int sigvec(signo, sv, osv)
  88         int signo;
  89         struct sigvec *sv, *osv;
  90 {
  91     return sigvec__(signo, sv, osv, 1);
  92 }
  93
  94 #if defined(__DYNAMIC__)
  95 int _sigvec_nobind(signo, sv, osv)
  96         int signo;
  97         struct sigvec *sv, *osv;
  98 {
  99     return sigvec__(signo, sv, osv, 0);
 100 }
 101 #endif
 102
 103 int sigsetmask(mask)
 104         int mask;
 105 {
 106         int omask, n;
 107
 108         n = sigprocmask(SIG_SETMASK, (sigset_t *) &mask, (sigset_t *) &omask);
 109         if (n)
 110                 return (n);
 111         return (omask);
 112 }
 113
 114 int sigblock(mask)
 115         int mask;
 116 {
 117         int omask, n;
 118
 119         n = sigprocmask(SIG_BLOCK, (sigset_t *) &mask, (sigset_t *) &omask);
 120         if (n)
 121                 return (n);
 122         return (omask);
 123 }
 124
 125 int sigpause(mask)
 126         int mask;
 127 {
 128         return (sigsuspend((sigset_t *)&mask));
 129 }
 130
 131 int sighold(sig)
 132         int sig;
 133 {
 134         sigset_t mask;
 135
 136         if ((sig < 0) || (sig > NSIG))
 137                 return(EINVAL);
 138         sigemptyset(&mask);
 139         sigaddset(&mask, sig);
 140         return(sigprocmask(SIG_BLOCK, &mask,(sigset_t *)0));
 141 }
 142 int sigrelse(sig)
 143         int sig;
 144 {
 145         sigset_t mask;
 146
 147         if ((sig < 0) || (sig > NSIG))
 148                 return(EINVAL);
 149         sigemptyset(&mask);
 150         sigaddset(&mask, sig);
 151         return(sigprocmask(SIG_UNBLOCK, &mask,(sigset_t *)0));
 152 }
 153