1 | /* |
2 | * Copyright (c) 2018 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 | /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ |
29 | /* |
30 | * Copyright (c) 1982, 1986, 1991, 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 | * @(#)subr_xxx.c 8.1 (Berkeley) 6/10/93 |
62 | */ |
63 | |
64 | #include <sys/param.h> |
65 | #include <sys/systm.h> |
66 | #include <sys/kernel.h> |
67 | #include <sys/conf.h> |
68 | #include <sys/proc_internal.h> |
69 | #include <sys/vnode.h> |
70 | #include <sys/uio.h> |
71 | #include <sys/sysproto.h> |
72 | |
73 | #include <sys/signalvar.h> /* for psignal() */ |
74 | #include <kern/debug.h> |
75 | |
76 | #if DEVELOPMENT || DEBUG |
77 | TUNABLE(bool, no_sigsys, "-no_sigsys" , false); |
78 | #endif |
79 | |
80 | /* |
81 | * Unsupported device function (e.g. writing to read-only device). |
82 | */ |
83 | int |
84 | enodev(void) |
85 | { |
86 | return ENODEV; |
87 | } |
88 | |
89 | /* |
90 | * Unsupported strategy function. |
91 | */ |
92 | void |
93 | enodev_strat(void) |
94 | { |
95 | return; |
96 | } |
97 | |
98 | /* |
99 | * Unconfigured device function; driver not configured. |
100 | */ |
101 | int |
102 | enxio(void) |
103 | { |
104 | return ENXIO; |
105 | } |
106 | |
107 | /* |
108 | * Unsupported ioctl function. |
109 | */ |
110 | int |
111 | enoioctl(void) |
112 | { |
113 | return ENOTTY; |
114 | } |
115 | |
116 | |
117 | /* |
118 | * Unsupported system function. |
119 | * This is used for an otherwise-reasonable operation |
120 | * that is not supported by the current system binary. |
121 | */ |
122 | int |
123 | enosys(void) |
124 | { |
125 | return ENOSYS; |
126 | } |
127 | |
128 | /* |
129 | * Return error for operation not supported |
130 | * on a specific object or file type. |
131 | * |
132 | * XXX Name of this routine is wrong. |
133 | */ |
134 | int |
135 | eopnotsupp(void) |
136 | { |
137 | return ENOTSUP; |
138 | } |
139 | |
140 | /* |
141 | * Generic null operation, always returns success. |
142 | */ |
143 | int |
144 | nullop(void) |
145 | { |
146 | return 0; |
147 | } |
148 | |
149 | |
150 | /* |
151 | * Null routine; placed in insignificant entries |
152 | * in the bdevsw and cdevsw tables. |
153 | */ |
154 | int |
155 | nulldev(void) |
156 | { |
157 | return 0; |
158 | } |
159 | |
160 | /* |
161 | * Null system calls. Not invalid, just not configured. |
162 | */ |
163 | int |
164 | errsys(void) |
165 | { |
166 | return EINVAL; |
167 | } |
168 | |
169 | void |
170 | nullsys(void) |
171 | { |
172 | } |
173 | |
174 | /* |
175 | * nonexistent system call-- signal process (may want to handle it) |
176 | * flag error if process won't see signal immediately |
177 | * Q: should we do that all the time ?? |
178 | */ |
179 | /* ARGSUSED */ |
180 | int |
181 | nosys(__unused struct proc *p, __unused struct nosys_args *args, __unused int32_t *retval) |
182 | { |
183 | if (send_sigsys) { |
184 | psignal_uthread(current_thread(), SIGSYS); |
185 | } |
186 | return ENOSYS; |
187 | } |
188 | |