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sigcompat.c revision 1.5 
      1 /*
      2  * Copyright (c) 1989 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #if defined(LIBC_SCCS) && !defined(lint)
     35 /*static char *sccsid = "from: @(#)sigcompat.c	5.3 (Berkeley) 2/24/91";*/
     36 static char *rcsid = "$Id: sigcompat.c,v 1.5 1994/01/31 17:37:05 ws Exp $";
     37 #endif /* LIBC_SCCS and not lint */
     38 
     39 #include <sys/param.h>
     40 #include <signal.h>
     41 
     42 int
     43 sigvec(signo, sv, osv)
     44 	int signo;
     45 	struct sigvec *sv, *osv;
     46 {
     47 	int ret;
     48 	struct sigvec nsv;
     49 
     50 	if (sv) {
     51 		nsv = *sv;
     52 		nsv.sv_flags ^= SV_INTERRUPT;	/* !SA_INTERRUPT */
     53 	}
     54 	ret = sigaction(signo,(struct sigaction *)&nsv,(struct sigaction *)osv);
     55 	if (ret == 0 && osv)
     56 		osv->sv_flags ^= SV_INTERRUPT;	/* !SA_INTERRUPT */
     57 	return (ret);
     58 }
     59 
     60 int
     61 sigsetmask(mask)
     62 	int mask;
     63 {
     64 	int omask, n;
     65 
     66 	n = sigprocmask(SIG_SETMASK, (sigset_t *) &mask, (sigset_t *) &omask);
     67 	if (n)
     68 		return (n);
     69 	return (omask);
     70 }
     71 
     72 int
     73 sigblock(mask)
     74 	int mask;
     75 {
     76 	int omask, n;
     77 
     78 	n = sigprocmask(SIG_BLOCK, (sigset_t *) &mask, (sigset_t *) &omask);
     79 	if (n)
     80 		return (n);
     81 	return (omask);
     82 }
     83 
     84 int
     85 sigpause(mask)
     86 	int mask;
     87 {
     88 	return (sigsuspend((sigset_t *)&mask));
     89 }
     90