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-rw-r--r--bsd-waitpid.c48
1 files changed, 48 insertions, 0 deletions
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1/*
2 * Redistribution and use in source and binary forms, with or without
3 * modification, are permitted provided that the following conditions
4 * are met:
5 * 1. Redistributions of source code must retain the above copyright
6 * notice, this list of conditions and the following disclaimer.
7 * 2. Redistributions in binary form must reproduce the above copyright
8 * notice, this list of conditions and the following disclaimer in the
9 * documentation and/or other materials provided with the distribution.
10 *
11 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
12 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
13 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
14 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
17 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
18 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 */
22
23#include "includes.h"
24
25#ifndef HAVE_WAITPID
26#include <errno.h>
27#include <sys/wait.h>
28#include <bsd-waitpid.h>
29
30pid_t
31waitpid(int pid, int *stat_loc, int options)
32{
33 union wait statusp;
34 pid_t wait_pid;
35
36 if (pid <= 0) {
37 if (pid != -1) {
38 errno = EINVAL;
39 return -1;
40 }
41 pid = 0; /* wait4() wants pid=0 for indiscriminate wait. */
42 }
43 wait_pid = wait4(pid, &statusp, options, NULL);
44 stat_loc = (int *)statusp.w_status;
45 return wait_pid;
46}
47
48#endif /* !HAVE_WAITPID */