pause.c revision 1.11 
11.11Schristos/*	$NetBSD: pause.c,v 1.11 2012/06/24 15:26:03 christos Exp $	*/
21.4Scgd
31.1Scgd/*
41.4Scgd * Copyright (c) 1983, 1993
51.4Scgd *	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.
151.10Sagc * 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
321.5Schristos#include <sys/cdefs.h>
331.1Scgd#if defined(LIBC_SCCS) && !defined(lint)
341.4Scgd#if 0
351.4Scgdstatic char sccsid[] = "@(#)pause.c	8.1 (Berkeley) 6/4/93";
361.4Scgd#else
371.11Schristos__RCSID("$NetBSD: pause.c,v 1.11 2012/06/24 15:26:03 christos Exp $");
381.4Scgd#endif
391.1Scgd#endif /* LIBC_SCCS and not lint */
401.1Scgd
411.6Sjtc#include "namespace.h"
421.1Scgd#include <signal.h>
431.1Scgd#include <unistd.h>
441.6Sjtc
451.6Sjtc#ifdef __weak_alias
461.9Smycroft__weak_alias(pause,_pause)
471.6Sjtc#endif
481.1Scgd
491.1Scgd/*
501.1Scgd * Backwards compatible pause.
511.1Scgd */
521.1Scgdint
531.11Schristospause(void)
541.1Scgd{
551.8Schristos	sigset_t omask;
561.1Scgd
571.8Schristos	if (sigprocmask(SIG_BLOCK, NULL, &omask) == -1)
581.8Schristos		return -1;
591.8Schristos
601.8Schristos	return sigsuspend(&omask);
611.1Scgd}
62