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sigwait.c revision 1.2.8.2 
      1 /* $NetBSD: sigwait.c,v 1.2.8.2 2008/04/28 20:23:01 martin Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2003 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jaromir Dolecek.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 __RCSID("$NetBSD: sigwait.c,v 1.2.8.2 2008/04/28 20:23:01 martin Exp $");
     35 #endif /* LIBC_SCCS and not lint */
     36 
     37 #include "namespace.h"
     38 #include <sys/types.h>
     39 #include <sys/syscall.h>
     40 #include <unistd.h>
     41 #include <signal.h>
     42 
     43 #ifdef __weak_alias
     44 __weak_alias(sigwait,_sigwait)
     45 #endif
     46 
     47 int	_sigwait __P((const sigset_t * __restrict, int * __restrict));
     48 
     49 /*
     50  * This is wrapper around sigtimedwait(2), providing sigwait()
     51  * implementation for userland.
     52  */
     53 int
     54 _sigwait(const sigset_t * __restrict set, int * __restrict signum)
     55 {
     56 	siginfo_t si;
     57 	int error;
     58 
     59 	error = sigtimedwait(set, &si, NULL);
     60 	if (!error)
     61 		*signum = si.si_signo;
     62 
     63 	return (error);
     64 }
     65