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      1 /*	$NetBSD: compat_wait4.c,v 1.4 2024/01/20 14:52:46 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 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 
     32 #include <sys/cdefs.h>
     33 #if defined(LIBC_SCCS) && !defined(lint)
     34 __RCSID("$NetBSD: compat_wait4.c,v 1.4 2024/01/20 14:52:46 christos Exp $");
     35 #endif /* LIBC_SCCS and not lint */
     36 
     37 #define __LIBC12_SOURCE__
     38 
     39 #include "namespace.h"
     40 #include <sys/types.h>
     41 #include <sys/wait.h>
     42 #include <sys/resource.h>
     43 #include <compat/sys/wait.h>
     44 #include <compat/sys/resource.h>
     45 
     46 __warn_references(wait3,
     47     "warning: reference to compatibility wait3(); include <sys/wait.h> to generate correct reference")
     48 __warn_references(wait4,
     49     "warning: reference to compatibility wait4(); include <sys/wait.h> to generate correct reference")
     50 
     51 #ifdef __weak_alias
     52 __weak_alias(wait4, _wait4)
     53 __weak_alias(_sys_wait4, _wait4)
     54 __weak_alias(wait3, _wait3)
     55 #endif
     56 
     57 /*
     58  * libc12 compatible wait4 routine.
     59  */
     60 pid_t
     61 wait3(int *status, int options, struct rusage50 *ru50)
     62 {
     63 	struct rusage ru;
     64 	pid_t rv;
     65 
     66 	if ((rv = __wait350(status, options, ru50 ? &ru : NULL)) == -1)
     67 		return rv;
     68 	if (ru50)
     69 		rusage_to_rusage50(&ru, ru50);
     70 	return rv;
     71 }
     72 
     73 pid_t
     74 wait4(pid_t wpid, int *status, int options, struct rusage50 *ru50)
     75 {
     76 	struct rusage ru;
     77 	pid_t rv;
     78 
     79 	if ((rv = __wait450(wpid, status, options, ru50 ? &ru : NULL)) == -1)
     80 		return rv;
     81 	if (ru50)
     82 		rusage_to_rusage50(&ru, ru50);
     83 	return rv;
     84 }
     85