1/*
2 * Copyright (c) 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)waitpid.c	8.1 (Berkeley) 6/4/93";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: src/lib/libc/gen/waitpid.c,v 1.7 2007/01/09 00:27:56 imp Exp $");
35
36#include "namespace.h"
37#include <sys/types.h>
38#include <sys/time.h>
39#include <sys/wait.h>
40#include <sys/resource.h>
41#include "un-namespace.h"
42
43#if __DARWIN_UNIX03
44#include <errno.h>
45#endif /* __DARWIN_UNIX03 */
46#ifdef VARIANT_CANCELABLE
47int __wait4(pid_t, int *, int , struct rusage *);
48#else /* !VARIANT_CANCELABLE */
49int __wait4_nocancel(pid_t, int *, int , struct rusage *);
50#endif /* VARIANT_CANCELABLE */
51
52pid_t
53__waitpid(pid_t pid, int *istat, int options)
54{
55#if __DARWIN_UNIX03
56	/* POSIX: Validate waitpid() options before calling wait4() */
57	if ((options & (WCONTINUED | WNOHANG | WUNTRACED)) != options) {
58		errno = EINVAL;
59		return ((pid_t)-1);
60	}
61#endif	/* __DARWIN_UNIX03 */
62
63#ifdef VARIANT_CANCELABLE
64	return (__wait4(pid, istat, options, (struct rusage *)0));
65#else /* !VARIANT_CANCELABLE */
66	return (__wait4_nocancel(pid, istat, options, (struct rusage *)0));
67#endif /* VARIANT_CANCELABLE */
68}
69
70__weak_reference(__waitpid, waitpid);
71__weak_reference(__waitpid, _waitpid);
72