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      1 /*	$NetBSD: sigcompat.c,v 1.13 2005/12/24 21:11:16 perry 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 1.13 2005/12/24 21:11:16 perry 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 }
    121