lib/libc/compat-43/sigcompat.c

   1 /*      $NetBSD: sigcompat.c,v 1.12 2005/09/13 01:44:09 christos Exp $  */
   2
   3 /*
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 #if 0
  35 static char sccsid[] = "@(#)sigcompat.c 8.1 (Berkeley) 6/2/93";
  36 #else
  37 __RCSID("$NetBSD: sigcompat.c,v 1.12 2005/09/13 01:44:09 christos Exp $");
  38 #endif
  39 #endif /* LIBC_SCCS and not lint */
  40
  41 #include <sys/param.h>
  42 #include <signal.h>
  43 #include <compat/sys/signal.h>
  44
  45 static inline void sv2sa(struct sigaction *, const struct sigvec *);
  46 static inline void sa2sv(struct sigvec *, const struct sigaction *);
  47
  48 static inline void
  49 sv2sa(struct sigaction *sa, const struct sigvec *sv)
  50 {
  51         sigemptyset(&sa->sa_mask);
  52         sa->sa_mask.__bits[0] = sv->sv_mask;
  53         sa->sa_handler = sv->sv_handler;
  54         sa->sa_flags = sv->sv_flags ^ SV_INTERRUPT; /* !SA_INTERRUPT */
  55 }
  56
  57 static inline void
  58 sa2sv(struct sigvec *sv, const struct sigaction *sa)
  59 {
  60         sv->sv_mask = sa->sa_mask.__bits[0];
  61         sv->sv_handler = sa->sa_handler;
  62         sv->sv_flags = sa->sa_flags ^ SV_INTERRUPT; /* !SA_INTERRUPT */
  63 }
  64
  65 int
  66 sigvec(int signo, struct sigvec *nsv, struct sigvec *osv)
  67 {
  68         int ret;
  69         struct sigaction osa, nsa;
  70
  71         if (nsv)
  72                 sv2sa(&nsa, nsv);
  73
  74         ret = sigaction(signo, nsv ? &nsa : NULL, osv ? &osa : NULL);
  75
  76         if (ret == 0 && osv)
  77                 sa2sv(osv, &osa);
  78
  79         return (ret);
  80 }
  81
  82 int
  83 sigsetmask(int mask)
  84 {
  85         sigset_t nmask, omask;
  86         int n;
  87
  88         sigemptyset(&nmask);
  89         nmask.__bits[0] = mask;
  90
  91         n = sigprocmask(SIG_SETMASK, &nmask, &omask);
  92         if (n)
  93                 return (n);
  94         return (omask.__bits[0]);
  95 }
  96
  97 int
  98 sigblock(int mask)
  99 {
 100         sigset_t nmask, omask;
 101         int n;
 102
 103         sigemptyset(&nmask);
 104         nmask.__bits[0] = mask;
 105
 106         n = sigprocmask(SIG_BLOCK, &nmask, &omask);
 107         if (n)
 108                 return (n);
 109         return (omask.__bits[0]);
 110 }
 111
 112 int
 113 sigpause(int mask)
 114 {
 115         sigset_t nmask;
 116
 117         sigemptyset(&nmask);
 118         nmask.__bits[0] = mask;
 119         return (sigsuspend(&nmask));
 120 }