11.14Schristos/*	$NetBSD: siginterrupt.c,v 1.14 2024/01/03 18:41:53 christos Exp $	*/
21.5Scgd
31.1Scgd/*
41.5Scgd * Copyright (c) 1989, 1993
51.5Scgd *	The Regents of the University of California.  All rights reserved.
61.1Scgd *
71.1Scgd * Redistribution and use in source and binary forms, with or without
81.1Scgd * modification, are permitted provided that the following conditions
91.1Scgd * are met:
101.1Scgd * 1. Redistributions of source code must retain the above copyright
111.1Scgd *    notice, this list of conditions and the following disclaimer.
121.1Scgd * 2. Redistributions in binary form must reproduce the above copyright
131.1Scgd *    notice, this list of conditions and the following disclaimer in the
141.1Scgd *    documentation and/or other materials provided with the distribution.
151.12Sagc * 3. Neither the name of the University nor the names of its contributors
161.1Scgd *    may be used to endorse or promote products derived from this software
171.1Scgd *    without specific prior written permission.
181.1Scgd *
191.1Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
201.1Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
211.1Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
221.1Scgd * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
231.1Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
241.1Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
251.1Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
261.1Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
271.1Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
281.1Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
291.1Scgd * SUCH DAMAGE.
301.1Scgd */
311.1Scgd
321.8Schristos#include <sys/cdefs.h>
331.1Scgd#if defined(LIBC_SCCS) && !defined(lint)
341.5Scgd#if 0
351.5Scgdstatic char sccsid[] = "@(#)siginterrupt.c	8.1 (Berkeley) 6/4/93";
361.5Scgd#else
371.14Schristos__RCSID("$NetBSD: siginterrupt.c,v 1.14 2024/01/03 18:41:53 christos Exp $");
381.5Scgd#endif
391.1Scgd#endif /* LIBC_SCCS and not lint */
401.1Scgd
411.9Sjtc#include "namespace.h"
421.14Schristos#include "extern.h"
431.1Scgd#include <signal.h>
441.9Sjtc
451.9Sjtc#ifdef __weak_alias
461.10Smycroft__weak_alias(siginterrupt,_siginterrupt)
471.9Sjtc#endif
481.1Scgd
491.1Scgd/*
501.1Scgd * Set signal state to prevent restart of system calls
511.1Scgd * after an instance of the indicated signal.
521.1Scgd */
531.7Sjtcint
541.13Sabssiginterrupt(int sig, int flag)
551.1Scgd{
561.1Scgd	struct sigaction sa;
571.1Scgd	int ret;
581.1Scgd
591.1Scgd	if ((ret = sigaction(sig, (struct sigaction *)0, &sa)) < 0)
601.1Scgd		return (ret);
611.1Scgd	if (flag) {
621.4Sjtc		sigaddset(&__sigintr, sig);
631.1Scgd		sa.sa_flags &= ~SA_RESTART;
641.1Scgd	} else {
651.4Sjtc		sigdelset(&__sigintr, sig);
661.1Scgd		sa.sa_flags |= SA_RESTART;
671.1Scgd	}
681.1Scgd	return (sigaction(sig, &sa, (struct sigaction *)0));
691.1Scgd}
70