1/*
2 * Copyright (c) 2000-2009 Apple 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/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
29/*
30 * Copyright (c) 1982, 1986, 1989, 1993
31 * The Regents of the University of California. All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 * must display the following acknowledgement:
43 * This product includes software developed by the University of
44 * California, Berkeley and its contributors.
45 * 4. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)kern_xxx.c 8.2 (Berkeley) 11/14/93
62 */
63/*
64 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
65 * support for mandatory and extensible security protections. This notice
66 * is included in support of clause 2.2 (b) of the Apple Public License,
67 * Version 2.0.
68 */
69
70#include <sys/param.h>
71#include <sys/systm.h>
72#include <sys/kernel.h>
73#include <sys/proc_internal.h>
74#include <sys/kauth.h>
75#include <sys/reboot.h>
76#include <sys/vm.h>
77#include <sys/sysctl.h>
78#include <sys/buf.h>
79
80#include <security/audit/audit.h>
81
82#include <sys/mount_internal.h>
83#include <sys/sysproto.h>
84#if CONFIG_MACF
85#include <security/mac_framework.h>
86#endif
87
88int pshm_cache_purge_all(proc_t p);
89int psem_cache_purge_all(proc_t p);
90
91int
92reboot(struct proc *p, struct reboot_args *uap, __unused int32_t *retval)
93{
94 char message[256];
95 int error=0;
96 size_t dummy=0;
97#if CONFIG_MACF
98 kauth_cred_t my_cred;
99#endif
100
101 AUDIT_ARG(cmd, uap->opt);
102
103 message[0] = '\0';
104
105 if ((error = suser(kauth_cred_get(), &p->p_acflag))) {
106#if (DEVELOPMENT || DEBUG)
107 /* allow non-root user to call panic on dev/debug kernels */
108 if (!(uap->opt & RB_PANIC))
109 return error;
110#else
111 return error;
112#endif
113 }
114
115 if (uap->opt & RB_COMMAND)
116 return ENOSYS;
117
118 if (uap->opt & RB_PANIC && uap->msg != USER_ADDR_NULL) {
119 if (copyinstr(uap->msg, (void *)message, sizeof(message), (size_t *)&dummy)) {
120 strncpy(message, "user space RB_PANIC message copyin failed", sizeof(message)-1);
121 }
122 }
123
124#if CONFIG_MACF
125#if (DEVELOPMENT || DEBUG)
126 if (uap->opt & RB_PANIC) {
127 /* on dev/debug kernels: allow anyone to call panic */
128 goto skip_cred_check;
129 }
130#endif
131 if (error)
132 return (error);
133 my_cred = kauth_cred_proc_ref(p);
134 error = mac_system_check_reboot(my_cred, uap->opt);
135 kauth_cred_unref(&my_cred);
136#if (DEVELOPMENT || DEBUG)
137skip_cred_check:
138#endif
139#endif
140 if (!error) {
141 OSBitOrAtomic(P_REBOOT, &p->p_flag); /* No more signals for this proc */
142 error = reboot_kernel(uap->opt, message);
143 }
144 return error;
145}
146
147int
148usrctl(struct proc *p, __unused struct usrctl_args *uap, __unused int32_t *retval)
149{
150 if (p != initproc) {
151 return EPERM;
152 }
153
154 int error = 0;
155 error = pshm_cache_purge_all(p);
156 if (error)
157 return error;
158
159 error = psem_cache_purge_all(p);
160 return error;
161}
162__attribute__((noreturn)) int network__stub__(void);
163int network__stub__(void) { panic("unimplemented network stub"); __builtin_unreachable(); }
164__attribute__((noreturn)) int network__stub1__(void);
165int network__stub1__(void) { panic("unimplemented network stub"); __builtin_unreachable(); }
166