1/*
2 * Copyright (c) 2000 Ben Lindstrom.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "includes.h"
26
27#ifndef HAVE_WAITPID
28#include <errno.h>
29#include <sys/wait.h>
30#include "bsd-waitpid.h"
31
32pid_t
33waitpid(int pid, int *stat_loc, int options)
34{
35	union wait statusp;
36	pid_t wait_pid;
37
38	if (pid <= 0) {
39		if (pid != -1) {
40			errno = EINVAL;
41			return (-1);
42		}
43		/* wait4() wants pid=0 for indiscriminate wait. */
44		pid = 0;
45	}
46	wait_pid = wait4(pid, &statusp, options, NULL);
47	if (stat_loc)
48		*stat_loc = (int) statusp.w_status;
49
50	return (wait_pid);
51}
52
53#endif /* !HAVE_WAITPID */
54