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      1 /*	$NetBSD: waitid.c,v 1.4 2016/04/06 04:09:10 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2016 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      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 #include <sys/cdefs.h>
     32 __RCSID("$NetBSD: waitid.c,v 1.4 2016/04/06 04:09:10 christos Exp $");
     33 
     34 #include "namespace.h"
     35 #include <sys/types.h>
     36 #include <sys/time.h>
     37 #include <sys/wait.h>
     38 #include <sys/resource.h>
     39 
     40 #include <string.h>
     41 #include <signal.h>
     42 
     43 #ifdef __weak_alias
     44 __weak_alias(waitid,_waitid)
     45 #endif
     46 
     47 int
     48 waitid(idtype_t idtype, id_t id, siginfo_t *info, int flags)
     49 {
     50 	int status;
     51 
     52 	switch (wait6(idtype, id, &status, flags, NULL, info)) {
     53 	case -1:
     54 		return -1;
     55 	case 0:
     56 		if (info != NULL)
     57 			memset(info, 0, sizeof(*info));
     58 		/*FALLTHROUGH*/
     59 	default:
     60 		return 0;
     61 	}
     62 }
     63