1/*
2 * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#include <sys/systm.h>
30#include <sys/proc_internal.h>
31#include <sys/vnode_internal.h> // vn_getpath()
32#include <kern/task.h>
33#include <sys/user.h>
34
35int	chudxnu_pid_for_task(task_t task);
36task_t	chudxnu_task_for_pid(int pid);
37int	chudxnu_current_pid(void);
38
39__private_extern__ int
40chudxnu_pid_for_task(task_t task)
41{
42     proc_t p;
43    int pid = -1;
44
45    if(task!=TASK_NULL) {
46        p = (proc_t)(get_bsdtask_info(task));
47        if(p) {
48            return (proc_pid(p));
49        }
50    }
51    return pid;
52}
53
54__private_extern__ task_t
55chudxnu_task_for_pid(int pid)
56{
57	task_t t = TASK_NULL;
58     proc_t p = proc_find(pid);
59    if(p) {
60        t =  p->task;
61	proc_rele(p);
62    }
63    return (t);
64}
65
66__private_extern__ int
67chudxnu_current_pid(void)
68{
69    int pid = -1;
70    struct uthread *ut = get_bsdthread_info(current_thread());
71    task_t t = current_task();
72
73    if(t != TASK_NULL) {
74        pid = chudxnu_pid_for_task(t);
75    }
76    if(-1 == pid) {
77        // no task, so try looking in the uthread and/or proc
78        pid = proc_pid(current_proc());
79
80        if(-1 == pid && ut && ut->uu_proc) {
81            pid = proc_pid(ut->uu_proc);
82        }
83    }
84
85    return pid;
86}
87