/* $NetBSD: siginterrupt.c,v 1.13 2012/06/25 22:32:43 abs Exp $ */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> #if defined(LIBC_SCCS) && !defined(lint) #if 0 static char sccsid[] = "@(#)siginterrupt.c 8.1 (Berkeley) 6/4/93"; #else __RCSID("$NetBSD: siginterrupt.c,v 1.13 2012/06/25 22:32:43 abs Exp $"); #endif #endif /* LIBC_SCCS and not lint */ #include "namespace.h" #include <signal.h> #ifdef __weak_alias __weak_alias(siginterrupt,_siginterrupt) #endif extern sigset_t __sigintr; /* * Set signal state to prevent restart of system calls * after an instance of the indicated signal. */ int siginterrupt(int sig, int flag) { struct sigaction sa; int ret; if ((ret = sigaction(sig, (struct sigaction *)0, &sa)) < 0) return (ret); if (flag) { sigaddset(&__sigintr, sig); sa.sa_flags &= ~SA_RESTART; } else { sigdelset(&__sigintr, sig); sa.sa_flags |= SA_RESTART; } return (sigaction(sig, &sa, (struct sigaction *)0)); } |