1*f14fb602SLionel Sambuc /* $NetBSD: siginterrupt.c,v 1.13 2012/06/25 22:32:43 abs Exp $ */
22fe8fb19SBen Gras
32fe8fb19SBen Gras /*
42fe8fb19SBen Gras * Copyright (c) 1989, 1993
52fe8fb19SBen Gras * The Regents of the University of California. All rights reserved.
62fe8fb19SBen Gras *
72fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without
82fe8fb19SBen Gras * modification, are permitted provided that the following conditions
92fe8fb19SBen Gras * are met:
102fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright
112fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer.
122fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright
132fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the
142fe8fb19SBen Gras * documentation and/or other materials provided with the distribution.
152fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors
162fe8fb19SBen Gras * may be used to endorse or promote products derived from this software
172fe8fb19SBen Gras * without specific prior written permission.
182fe8fb19SBen Gras *
192fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
202fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
212fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
222fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
232fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
242fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
252fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
262fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
272fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
282fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
292fe8fb19SBen Gras * SUCH DAMAGE.
302fe8fb19SBen Gras */
312fe8fb19SBen Gras
322fe8fb19SBen Gras #include <sys/cdefs.h>
332fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint)
342fe8fb19SBen Gras #if 0
352fe8fb19SBen Gras static char sccsid[] = "@(#)siginterrupt.c 8.1 (Berkeley) 6/4/93";
362fe8fb19SBen Gras #else
37*f14fb602SLionel Sambuc __RCSID("$NetBSD: siginterrupt.c,v 1.13 2012/06/25 22:32:43 abs Exp $");
382fe8fb19SBen Gras #endif
392fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */
402fe8fb19SBen Gras
412fe8fb19SBen Gras #include "namespace.h"
422fe8fb19SBen Gras #include <signal.h>
432fe8fb19SBen Gras
442fe8fb19SBen Gras #ifdef __weak_alias
452fe8fb19SBen Gras __weak_alias(siginterrupt,_siginterrupt)
462fe8fb19SBen Gras #endif
472fe8fb19SBen Gras
482fe8fb19SBen Gras extern sigset_t __sigintr;
492fe8fb19SBen Gras /*
502fe8fb19SBen Gras * Set signal state to prevent restart of system calls
512fe8fb19SBen Gras * after an instance of the indicated signal.
522fe8fb19SBen Gras */
532fe8fb19SBen Gras int
siginterrupt(int sig,int flag)54*f14fb602SLionel Sambuc siginterrupt(int sig, int flag)
552fe8fb19SBen Gras {
562fe8fb19SBen Gras struct sigaction sa;
572fe8fb19SBen Gras int ret;
582fe8fb19SBen Gras
592fe8fb19SBen Gras if ((ret = sigaction(sig, (struct sigaction *)0, &sa)) < 0)
602fe8fb19SBen Gras return (ret);
612fe8fb19SBen Gras if (flag) {
622fe8fb19SBen Gras sigaddset(&__sigintr, sig);
632fe8fb19SBen Gras sa.sa_flags &= ~SA_RESTART;
642fe8fb19SBen Gras } else {
652fe8fb19SBen Gras sigdelset(&__sigintr, sig);
662fe8fb19SBen Gras sa.sa_flags |= SA_RESTART;
672fe8fb19SBen Gras }
682fe8fb19SBen Gras return (sigaction(sig, &sa, (struct sigaction *)0));
692fe8fb19SBen Gras }
70