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sigcompat.c revision 1.10 
      1 /*	$NetBSD: sigcompat.c,v 1.10 1998/09/27 13:21:28 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #if defined(LIBC_SCCS) && !defined(lint)
     38 #if 0
     39 static char sccsid[] = "@(#)sigcompat.c	8.1 (Berkeley) 6/2/93";
     40 #else
     41 __RCSID("$NetBSD: sigcompat.c,v 1.10 1998/09/27 13:21:28 christos Exp $");
     42 #endif
     43 #endif /* LIBC_SCCS and not lint */
     44 
     45 #include <sys/param.h>
     46 #include <signal.h>
     47 
     48 static __inline void sv2sa __P((struct sigaction *, const struct sigvec *));
     49 static __inline void sa2sv __P((struct sigvec *, const struct sigaction *));
     50 
     51 static __inline void
     52 sv2sa(sa, sv)
     53 	struct sigaction *sa;
     54 	const struct sigvec *sv;
     55 {
     56 	sigemptyset(&sa->sa_mask);
     57 	sa->sa_mask.__bits[0] = sv->sv_mask;
     58 	sa->sa_handler = sv->sv_handler;
     59 	sa->sa_flags = sv->sv_flags ^ SV_INTERRUPT; /* !SA_INTERRUPT */
     60 }
     61 
     62 static __inline void
     63 sa2sv(sv, sa)
     64 	struct sigvec *sv;
     65 	const struct sigaction *sa;
     66 {
     67 	sv->sv_mask = sa->sa_mask.__bits[0];
     68 	sv->sv_handler = sa->sa_handler;
     69 	sv->sv_flags = sa->sa_flags ^ SV_INTERRUPT; /* !SA_INTERRUPT */
     70 }
     71 
     72 int
     73 sigvec(signo, nsv, osv)
     74 	int signo;
     75 	struct sigvec *nsv, *osv;
     76 {
     77 	int ret;
     78 	struct sigaction osa, nsa;
     79 
     80 	if (nsv)
     81 		sv2sa(&nsa, nsv);
     82 
     83 	ret = sigaction(signo, nsv ? &nsa : NULL, osv ? &osa : NULL);
     84 
     85 	if (ret == 0 && osv)
     86 		sa2sv(osv, &osa);
     87 
     88 	return (ret);
     89 }
     90 
     91 int
     92 sigsetmask(mask)
     93 	int mask;
     94 {
     95 	sigset_t nmask, omask;
     96 	int n;
     97 
     98 	sigemptyset(&nmask);
     99 	nmask.__bits[0] = mask;
    100 
    101 	n = sigprocmask(SIG_SETMASK, &nmask, &omask);
    102 	if (n)
    103 		return (n);
    104 	return (omask.__bits[0]);
    105 }
    106 
    107 int
    108 sigblock(mask)
    109 	int mask;
    110 {
    111 	sigset_t nmask, omask;
    112 	int n;
    113 
    114 	sigemptyset(&nmask);
    115 	nmask.__bits[0] = mask;
    116 
    117 	n = sigprocmask(SIG_BLOCK, &nmask, &omask);
    118 	if (n)
    119 		return (n);
    120 	return (omask.__bits[0]);
    121 }
    122 
    123 int
    124 sigpause(mask)
    125 	int mask;
    126 {
    127 	sigset_t nmask;
    128 
    129 	sigemptyset(&nmask);
    130 	nmask.__bits[0] = mask;
    131 	return (sigsuspend(&nmask));
    132 }
    133